58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

www.dalbec.com    dalbec@dalbec.com

 

 

 

L Q t

Linear Q Transition

Loudspeakers

 

 

 

SPECIFICATIONS,

PRICE LIST & ADVISORY

 

 

[ revised 04.05.03 ]

 

 

 

58 King Street    Troy, NY 12180    phone (518) 272-7098    fax (518) 272-2520

 

 

 

 

 

 

 

[ 1 of 20 ]

 

 

 

L Q t

Linear Q Transition Loudspeakers

 

TABLE OF CONTENTS

 

PRICE LIST                                                                                                            PAGE

                                                RETAIL, DEALER & CONTRACTOR                                                          3

 

MODELS

                                                J 18 F - P                                                                                                         4

                                                J 18 B - P                                                                                                         5

            J 15 B                                                                                                               6

 

                2-12 DC - P                                                                                                     7

            2-12 DC                                                                                                           8

 

                1-15 MH - P                                                                                                     9

            1-15 MH                                                                                                         10

 

                CH 112 - P                                                                                                     11

            CH 112                                                                                                           12

            CH 112 - X                                                                                                     13

            CH 112 - FL                                                                                                   14

 

                CH 108                                                                                                           15

            CH 108 - X                                                                                                     16

 

            DP 208                                                                                                           17       

 

OPTIONS & ASSOCIATED COSTS

            CUSTOM TINTED FINISH                                                                           18

            CUSTOM TINTED STAIN                                                                            18

            CUSTOM PAINTED GRILLE                                                                      18

            CUSTOM COLOR CLOTH  WRAPPED GRILLE                                    18

            WEATHER RESISTANT TREATMENT                                                     18

            CUSTOM INTERNAL TRANSFORMER                                                    18

            PORTABLE HARDWARE & FINISH                                                          18

 

ADVISORY                                                                                                               19, 20

 

 

[ 2 of 20 ]

58 King Street    Troy, NY 12180   

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

                                                LIST PRICE              

J 18 F - P                           $3,600.00 ea.           

1,000w full size j-bin                   1,000w RMS 18" LF driver

 

J 18 B - P                           $1,800.00 ea.           

1,000w reduced size j-bin           1,000w RMS 18" LF driver

 

J 15 B                                  $1,400.00 ea.           

600w reduced size j-bin              600w RMS 15" LF driver

 

DC 212 -    P                     $2,000.00 ea.           

875w di-centric                          75w RMS 3" (1.4" exit) HF wave guide between two 400w RMS 12" LF drivers

 

DC 212                              $1,750.00 ea.           

650w di-centric                          50w RMS 3" (1.4" exit) HF horn between two 300w RMS 12" LF drivers

 

MH 115 - P                                 $2,250.00 ea.           

575w full range                           75w RMS 3" (1.4" exit) HF wave guide & 500w RMS 15" LF driver

 

MH 115                              $1,850.00 ea.           

450w full range                           50w RMS 3" (1.4" exit) HF wave guide & 400w RMS 15" LF driver

 

CH 112 - P                         $1,750.00 ea.           

575w concentric             75w RMS 3" (2" conical exit) HF wave guide & 500w RMS 12" LF driver

 

CH 112                              $1,200.00 ea.           

350w concentric             50w RMS 2.5" (1" conical exit) HF wave guide & 300w RMS 12" LF driver

 

CH 112 - X                         $1,400.00 ea.           

350w concentric             50w RMS 2.5" (1" conical exit) HF wave guide & 300w RMS 12" LF driver

                                                with internal 2-way passive crossover

 

CH 112 - FL                      $1,400.00 ea.           

350w front loaded for                  50w RMS 3" (1.4" exit) HF wave guide & 300w RMS 12" LF driver

stage monitor or nearfield use     with internal 2-way passive crossover & portable hardware options

 

CH 108                              $   950.00 ea.           

230w concentric             30w RMS 2.5" (1" conical exit) HF wave guide & 200w RMS 8" LF driver

 

CH 108 - X                         $1,150.00 ea.           

230w concentric             30w RMS 2.5" (1" conical exit) HF wave guide & 200w RMS 8" LF driver

                                                with internal 2-way passive crossover

 

DP 208                              $1,400.00 ea.           

430w di-polar                 30w RMS 2.5" (1" exit) HF wave guide & two 200w RMS 8" LF drivers

 

 

 FOB Dalbec Audio  /  All Prices & Terms Subject To Change Without Notice

[ 3 of 20 ]

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

J 18 F - P      1,000w full size j-bin

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low band frequencies shall be reproduced with one 2,000w Continuous Program / 3,000w Peak (1,000w RMS / EIA-RS-426A), 8 ohm 18" driver with a 4" voice coil, loaded onto a three pole symmetrical wave guide assisted system (aka "J-Bin"), covering 30Hz to 120Hz.  Horizontal directivity @ 50Hz is 240 degrees linearly increasing to 120 degrees @ 120Hz.  Woofer excursion control provided below wave guide cutoff frequency of 50Hz.

 

 

The loudspeaker is capable of producing SPL's in excess of 136db long term, and 142db short term within the specified frequency range.

 

Sensitivity (1w / 1meter) = 106db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 60" high x 24" wide x 30" deep  The loudspeaker weight shall not be greater than 160lbs.

 

Rear connectors shall utilize Neutrik NL4 ( pins 1+ & 1- ).

 

 

 

 

 

 

 

 

[ 4 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

J 18 B - P      1,000w reduced size j-bin

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low band frequencies shall be reproduced with one 2,000w Continuous Program / 3,000w Peak (1,000w RMS / EIA-RS-426A), 8 ohm 18" driver with a 4" voice coil, loaded onto a three pole symmetrical wave guide assisted system (aka "J-Bin"), covering 35Hz to 120Hz.  Horizontal directivity @ 50Hz is 240 degrees linearly increasing to 120 degrees @ 120Hz.  Woofer excursion control provided below wave guide cutoff frequency of 50Hz.

 

 

The loudspeaker is capable of producing SPL's in excess of 134db long term, and 140db short term within the specified frequency range.

 

Sensitivity (1w / 1meter) = 104db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 36" high x 24" wide x 30" deep  The loudspeaker weight shall not be greater than 130lbs.

 

Rear connectors shall utilize Neutrik NL4 ( pins 1+ & 1- ).

 

 

 

 

 

 

 

 

[ 5 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

J 15 B           600w reduced size j-bin

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low band frequencies shall be reproduced with one 1,200w Continuous Program / 1,800w Peak (600w RMS / EIA-RS-426A), 8 ohm 15" driver with a 4" voice coil, loaded into a three pole symmetrical wave guide assisted system (aka "J-Bin"), covering 35Hz to 120Hz.  Horizontal directivity @ 50Hz is 240 degrees linearly increasing to 120 degrees @ 120Hz.  Woofer excursion control provided below wave guide cutoff frequency of 50Hz.

 

The loudspeaker is capable of producing SPL's in excess of 128db long term, and 134db short term within the specified frequency range.

 

Sensitivity (1w / 1meter) = 102db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 36" high x 24" wide x 30" deep  The loudspeaker weight shall not be greater than 130lbs.

 

Rear connectors shall utilize Neutrik NL4 ( pins 1+ & 1- ).

 

 

 

 

 

 

 

 

 

[ 6 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

DC 212 - P         875w di-centric array

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low and Mid band frequencies shall be reproduced with two 800w Continuous Program / 1200w Peak (400w RMS / EIA-RS-426A), 8 ohm 12" drivers with 3" voice coils mounted on a constant directivity wave guide, covering 80Hz to 2500Hz.  Horizontal directivity @ 500Hz is 110 degrees linearly increasing to 80 degrees @ 2000Hz.  Vertical directivity averages at 60 degrees.

 

High frequencies will be reproduced with one 150w Continuous Program / 225w Peak (75w RMS / EIA-RS-426A), 8 ohm, 3" large format compression driver loading a 1.4" throated constant directivity wave guide covering 1500Hz to 20kHz.  Horizontal directivity is 60 degrees.  Vertical directivity is 40 degrees.

 

The loudspeaker is capable of producing SPL's in excess of 133db long term, and 138db short term within the specified frequency range.

 

Sensitivity (1w / 1meter) = 105db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.  A perforated, impact resistant metal grille is fitted to the front of the loudspeaker and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 36" high x 20" wide x 20" deep  The loudspeaker weight shall not be greater than 100lbs.

 

Rear connectors for bi-amp operation shall utilize Neutrik NL4 (pins 1+ & 1- for LF/MB, pins 2+ & 2- for HF).

 

 

[ 7 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

DC 212         650w di-centric array

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low and Mid band frequencies shall be reproduced with two 600w Continuous Program / 900w Peak (300w RMS / EIA-RS-426A), 8 ohm 12" drivers with 3" voice coils mounted on a constant directivity wave guide, covering 80Hz to 2500Hz.  Horizontal directivity @ 500Hz is 110 degrees linearly increasing to 80 degrees @ 2000Hz.  Vertical directivity averages at 60 degrees.

 

High frequencies will be reproduced with one 100w Continuous Program / 150w Peak (50w RMS / EIA-RS-426A), 8 ohm, 3" large format compression driver loading a 1.4" throated constant directivity wave guide covering 1500Hz to 20kHz.  Horizontal directivity is 90 degrees.  Vertical directivity is 40 degrees.

 

The loudspeaker is capable of producing SPL's in excess of 130db long term, and 136db short term within the specified frequency range.

 

Sensitivity (1w / 1meter) = 103db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.  A perforated, impact resistant metal grille is fitted to the front of the loudspeaker and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 36" high x 20" wide x 20" deep  The loudspeaker weight shall not be greater than 100lbs.

 

Rear connectors for bi-amp operation shall utilize Neutrik NL4 (pins 1+ & 1- for LF/MB, pins 2+ & 2- for HF).

 

 

[ 8 of 20 ]

 

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

MH 115 - P         575w full range system

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low and Mid band frequencies shall be reproduced with one 1,000w Continuous Program / 1,500w Peak (500w RMS / EIA-RS-426A), 8 ohm 15" driver with a 4" voice coil mounted on a constant directivity wave guide, covering 45Hz to 2000Hz.  Horizontal directivity @ 500Hz is 110 degrees linearly increasing to 80 degrees @ 1800Hz.  Vertical directivity averages at 60 degrees.

 

High frequencies will be reproduced with one 150w Continuous Program / 225w Peak (75w RMS / EIA-RS-426A), 8 ohm 3" large format compression driver loading a 1.4" throated constant directivity wave guide covering 1500Hz to 20kHz.  Horizontal directivity is 90 degrees.  Vertical directivity is 40 degrees.

 

The loudspeaker is capable of producing SPL's in excess of 130db long term, and 136db short term within the specified frequency range.

 

Sensitivity (1w / 1meter) = 103db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.  A perforated, impact resistant metal grille is fitted to the front of the loudspeaker and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 32" high x 22" wide x 22" deep  The loudspeaker weight shall not be greater than 90lbs.

 

Rear connectors for bi-amp operation shall utilize Neutrik NL4 (pins 1+ & 1- for LF/MB, pins 2+ & 2- for HF).

 

 

[ 9 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

MH 115         450w full range system

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low and Mid band frequencies shall be reproduced with one 800w Continuous Program / 1,200w Peak (400w RMS / EIA-RS-426A), 8 ohm 15" driver with a 4" voice coil mounted on a constant directivity wave guide, covering 60Hz to 2000Hz.  Horizontal directivity @ 500Hz is 110 degrees linearly increasing to 80 degrees @ 1800Hz.  Vertical directivity averages at 60 degrees.

 

High frequencies will be reproduced with one 100w Continuous Program / 150w Peak (50w RMS / EIA-RS-426A), 8 ohm 3" large format compression driver loading a 1.4" throated constant directivity wave guide covering 1500Hz to 20kHz.  Horizontal directivity is 60 degrees.  Vertical directivity is 40 degrees.

 

The loudspeaker is capable of producing SPL's in excess of 129db long term, and 135db short term within the specified frequency range.

 

Sensitivity (1w / 1meter) = 103db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.  A perforated, impact resistant metal grille is fitted to the front of the loudspeaker and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 32" high x 22" wide x 22" deep  The loudspeaker weight shall not be greater than 90lbs.

 

Rear connectors for bi-amp operation shall utilize Neutrik NL4 (pins 1+ & 1- for LF/MB, pins 2+ & 2- for HF).

 

 

[ 10 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

CH 112 - P         575w concentric system

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low and Mid band frequencies shall be reproduced with one 1,000w Continuous Program / 1,500w Peak (500w RMS / EIA-RS-426A), 8 ohm 12" driver with a 4" voice coil mounted on a constant directivity wave guide, covering 100Hz to 2500Hz.  Horizontal directivity @ 500Hz is 110 degrees linearly increasing to 80 degrees @ 2000Hz.  Vertical directivity averages at 60 degrees.

 

High frequencies will be reproduced with one 150w Continuous Program / 225w Peak (75w RMS / EIA-RS-426A), 8 ohm 3" large format compression driver loading a 2" throated, coaxially mounted conical wave guide covering 1500Hz to 20kHz.  Horizontal and vertical directivity is 60 degrees.

 

The loudspeaker is capable of producing SPL's in excess of 130db long term, and 136db short term within the specified frequency range.

 

Sensitivity (1w / 1meter) = 103db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.  A perforated, impact resistant metal grille is fitted to the front of the loudspeaker and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 20" high x 20" wide x 20" deep  The loudspeaker weight shall not be greater than 60lbs.

 

Rear connectors for bi-amp operation shall utilize Neutrik NL4 (pins 1+ & 1- for LF/MB, pins 2+ & 2- for HF).

 

 

[ 11 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

CH 112         350w concentric system

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low and Mid band frequencies shall be reproduced with one 600w Continuous Program / 900w Peak (300w RMS / EIA-RS-426A), 8 ohm 12" driver with a 4" voice coil mounted on a constant directivity wave guide, covering 100Hz to 2500Hz.  Horizontal directivity @ 500Hz is 110 degrees linearly increasing to 80 degrees @ 2000Hz.  Vertical directivity averages at 60 degrees.

 

High frequencies will be reproduced with one 100w Continuous Program / 150w Peak (50w RMS / EIA-RS-426A), 8 ohm 2.5" compression driver loading a 1" throated, coaxially mounted conical wave guide covering 1500Hz to 20kHz.  Horizontal and vertical directivity is 60 degrees.

 

The loudspeaker is capable of producing SPL's in excess of 128db long term, and 134db short term within the specified frequency range.

 

Sensitivity (1w / 1meter) = 103db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.  A perforated, impact resistant metal grille is fitted to the front of the loudspeaker and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 20" high x 20" wide x 20" deep  The loudspeaker weight shall not be greater than 60lbs.

 

Rear connectors for bi-amp operation shall utilize Neutrik NL4 (pins 1+ & 1- for LF/MB, pins 2+ & 2- for HF).

 

 

 

[ 12 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

CH 112 - X    350w concentric passive system

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low and Mid band frequencies shall be reproduced with one 600w Continuous Program / 900w Peak (300w RMS / EIA-RS-426A), 8 ohm 12" driver with a 4" voice coil mounted on a constant directivity wave guide, covering 100Hz to 2500Hz.  Horizontal directivity @ 500Hz is 110 degrees linearly increasing to 80 degrees @ 2000Hz.  Vertical directivity averages at 60 degrees.

 

High frequencies will be reproduced with one 100w Continuous Program / 150w Peak (50w RMS / EIA-RS-426A), 8 ohm 2.5" compression driver loading a 1" throated, coaxially mounted conical wave guide covering 1500Hz to 20kHz.  Horizontal and vertical directivity is 60 degrees.

 

The 2-way internal crossover shall utilize a 400w RMS, 8 ohm, 18db per octave high pass filter and a 12db per octave low pass filter at 1600Hz. Voltage dependent soft limiting resistors, high quality polycarbonate capacitors and components are surface mounted.

 

The loudspeaker is capable of producing SPL's in excess of 126db long term, and 132db short term within the specified frequency range.  Sensitivity (1w / 1meter) = 102db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.  A perforated, impact resistant metal grille is fitted to the front of the loudspeaker and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 20" high x 20" wide x 20" deep  The loudspeaker weight shall not be greater than 60lbs.

 

Rear connectors shall utilize Neutrik NL4 (pins 1+ & 1-).

 

 

[ 13 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

CH 112 - FL       700w concentric

 Directivity assist  (200-1200hz.)  stage monitor

 

 

SPECIFICATION

 

Low and Mid band frequencies shall be reproduced with one 600w Continuous Program / 900w Peak (300w RMS / EIA-RS-426A), 8 ohm 12" driver with a 3" voice coil covering 70Hz to 2500Hz.  Horizontal directivity @ 500Hz is 160 degrees linearly increasing to 100 degrees @ 2000Hz.  Vertical directivity averages at 80 degrees.

 

High frequencies will be reproduced with one 100w Continuous Program / 150w Peak (50w RMS / EIA-RS-426A), 8 ohm 2.5" compression driver loading a 1.4" throated, coaxially mounted conical wave guide covering 1500Hz to 20kHz.  Horizontal and vertical directivity is 80 degrees.

 

 

 

The loudspeaker is capable of producing SPL's in excess of 126db long term, and 132db short term within the specified frequency range.  Sensitivity (1w / 1meter) = 98db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.  A perforated, impact resistant metal grille is fitted to the front of the loudspeaker and finished to specification.

 

 

The loudspeaker dimensions shall be no larger than 16" high x 20" wide x 14" deep  The loudspeaker weight shall not be greater than 50lbs.

 

Rear connectors shall utilize dual Neutrik NL4 .

 

 

 

 

 

 

[ 14 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

CH 108         230w concentric system

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low and Mid band frequencies shall be reproduced with one 400w Continuous Program / 600w Peak (200w RMS / EIA-RS-426A), 8 ohm 8" driver with a 3" voice coil mounted on a constant directivity wave guide, covering 100Hz to 2000Hz.  Horizontal directivity @ 500Hz is 110 degrees linearly increasing to 80 degrees @ 1800Hz.  Vertical directivity averages at 60 degrees.

 

High frequencies will be reproduced with one 60w Continuous Program / 90w Peak (30w RMS / EIA-RS-426A), 8 ohm 2.5" compression driver loading a 1" throated, coaxially mounted conical wave guide covering 1500Hz to 20kHz.  Horizontal and vertical directivity is 60 degrees.

 

The loudspeaker is capable of producing SPL's in excess of 124db long term, and 130db short term within the specified frequency range.

 

Sensitivity (1w / 1meter) = 100db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.  A perforated, impact resistant metal grille is fitted to the front of the loudspeaker and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 16" high x 14" wide x 15" deep  The loudspeaker weight shall not be greater than 30lbs.

 

Rear connectors for bi-amp operation shall utilize Neutrik NL4 (pins 1+ & 1- for LF/MB, pins 2+ & 2- for HF).

 

 

 

[ 15 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

CH 108 - X    230w concentric passive system

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low and Mid band frequencies shall be reproduced with one 400w Continuous Program / 600w Peak (200w RMS / EIA-RS-426A), 8 ohm 8" driver with a 3" voice coil mounted on a constant directivity wave guide, covering 100Hz to 2000Hz.  Horizontal directivity @ 500Hz is 110 degrees linearly increasing to 80 degrees @ 1800Hz.  Vertical directivity averages at 60 degrees.

 

High frequencies will be reproduced with one 60w Continuous Program / 90w Peak (30w RMS / EIA-RS-426A), 8 ohm 2.5" compression driver loading a 1" throated, coaxially mounted conical wave guide covering 1500Hz to 20kHz.  Horizontal and vertical directivity is 90 degrees.

 

The 2-way internal crossover shall utilize a 400w RMS, 8 ohm, 18db per octave high pass filter and a 12db per octave low pass filter at 1800Hz. Voltage dependent soft limiting resistors, high quality polycarbonate capacitors and components are surface mounted.

 

The loudspeaker is capable of producing SPL's in excess of 124db long term, and 130db short term within the specified frequency range.

 

Sensitivity (1w / 1meter) = 100db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.  A perforated, impact resistant metal grille is fitted to the front of the loudspeaker and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 16" high x 14" wide x 15" deep  The loudspeaker weight shall not be greater than 30lbs.

 

Rear connectors shall utilize Neutrik NL4 (pins 1+ & 1-).

 

[ 16 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

 

DP 208          430w di-polar system

 

 

SPECIFICATIONS:

 

The loudspeaker shall be a wave guide loaded type.

 

Low and Mid band frequencies shall be reproduced with two 400w Continuous Program / 600w Peak (200w RMS / EIA-RS-426A), 8 ohm 8" driver with a 2 1/2" voice coil mounted on a in a di-pole configuration on two parallel constant directivity wave guides, covering 100Hz to 2000Hz.  Horizontal directivity @ 500Hz is 140 degrees linearly increasing to 100 degrees @ 1800Hz.  Vertical directivity averages at 60 degrees.

 

High frequencies will be reproduced with one 60w Continuous Program / 90w Peak (30w RMS / EIA-RS-426A), 8 ohm 2.5" compression driver loading a 1" throated wave guide covering 1500Hz to 20kHz.  Horizontal and vertical directivity is 60 degrees.

 

The loudspeaker is capable of producing SPL's in excess of 124db long term, and 130db short term within the specified frequency range.

 

Sensitivity (1w / 1meter) = 101db.

 

The enclosure shall be constructed of voidless multi-layer hardwood and finished to specification.  A perforated, impact resistant metal grille is fitted to the front of the loudspeaker and finished to specification.

 

All internal mounting hardware exhibiting a 10:1 safety margin shall be provided per installation specification.

 

The loudspeaker dimensions shall be no larger than 10" high x 14" wide x 10" deep  The loudspeaker weight shall not be greater than 40lbs.

 

Rear connectors shall utilize Neutrik NL4 (pins 1+ & 1- for LF/MB, pins 2+ & 2- for HF).

 

 

 

 

 

 

[ 17 of 20 ]

 

58 King Street    Troy, NY 12180

phone (518) 272-7098    fax (518) 272-2520

 

L Q t

Linear Q Transition Loudspeakers

 

OPTIONS & ASSOCIATED COSTS

Standard box finishes are black or white Duratec textured finish.  Standard perforated metal grilles are coated in black.  Custom finishes and other options are available as listed below.

 

                                                LIST PRICE     

CUSTOM

TINTED                           $  150.00 /box

DURATEC  FINISH

 

CUSTOM

TINTED STAIN               $  300.00 /box

/ CLEAR COATED

 

CUSTOM

COATED GRILLE         $  100.00 /box

COLOR

 

CUSTOM

COLOR CLOTH             $  100.00 /box

WRAPPED GRILLE

 

WEATHER
RESISTANT                
$  200.00 /box

TREATMENT

 

PORTABLE
HARDWARE                
$  200.00 /box

& FINISH                            (handles, pole cup, double coated finish)

 

CUSTOM

INTERNAL          70v            $  150.00 /box

*TRANSFORMER          *  limits loudspeaker performance to 100w RMS

 

[ 18 of 20 ]

 

Richard Dalbec

58 King Street  l  Troy, New York 12180

phone (518) 272-7098  l  fax (518) 272-2520

dalbec@dalbec.com

 

 

ADVISORY

 

 

Linear Q Transition

loudspeaker series

[ rev 05/16/03 ]

 

General Description:

Dalbec Audio's Linear Q Transition loudspeaker series, herein referred to as "LQt", exhibit numerous desirable performance characteristics not available in size or price equivalents.  The LQt series is designed to excel in mid

to far field (>50') quality reinforcement environments and performing arts applications especially in reverberant,  acoustically challenged venues, or in situations where conventional systems have not proven successful.

 

Directivity control management is the most important characteristic that differentiates the LQt series from traditional loudspeaker arrays.  Conventional compact type systems lack usable directivity control between the critical 100Hz to 2kHz range.  These systems achieve satisfactory directivity only above the HF (high frequency) cross point  (typically around 2kHz)  rendering the programming between 100Hz and 2kHz unacceptable in critical venues.  Most manufacturers publish directivity figures for their assemblies, stating only the high frequency (HF) wave guide performance.  There has been a recent trend with some manufacturers publishing "average" directivity data which still avoids specific directivity figures for frequencies under 2kHz.  It is shameful that such misrepresented estimates are used as the source data fed into the latest wave of computer generated performance predictions.

 

Manufacturers of said smaller format assemblies avoid publishing specifications on directivity control for the lower frequencies due to the fact that little or no control is present below approximately 2kHz with their units.  This results in minimal articulate distance, exaggerated room interaction, poor mid to far field balance, as well as spill over to the microphone sources which also reduces gain to feedback ratios.  Unfortunately, otherwise wonderful new installations have been compromised by misrepresented loudspeaker components, and the trend to supply these flawed systems is growing.

 

The LQt Concept:  A Solution to These Directivity Problems

The most critical performance characteristic a loudspeaker can exhibit is wideband control of directivity suited to the application.  Conventional loudspeaker parameters such as frequency response and phase coherence are easily correctable with the most basic of electronic processing, yet no device exists to convert a conventional loudspeaker with chaotic LF and MB directivity charateristics into an acceptable performer.

 

The Dalbec Audio LQt series utilizes proprietary physical design characteristics that bridge the gap between the effective yet very large and exotic far field systems and the conventional smaller format units lacking directivity control.  Through more than 15 years of research and field application, an ideal combination of compact component size and directivity performance has been realized, yielding a smooth, linear transition of directivity from the predictable high frequencies, through the critical and often neglected mid and lower frequencies, rendering conventional compact array designs unacceptable in critical applications.

 

 

 

 

 

 

 

[ 19 of 20 ]

 

 

LQt technology is a parameter we address as a function of critical performance.  Secondary advanced concept designs include the following:

 

A.        Advanced Large Format H.F. Assemblies

A significant HF driver motor to wave guide throat design removes the HF driver motor from the MB / LF (mid band / low frequency) wave guide cavity  placing the HF  wave guide at the acoustic center of the MB / LF wave guide improving coherence, in addition to eliminating all stress on the wave guide throat.  Another distinct advantage to this mounting method allows the HF wave guide exit to sum into the MB / LF wave guide without a front wave guide mounting apparatus to aberrate the mix.  CAD machining was required to enable us to duplicate the complex HF wave guide model parts from a perfect inert polymer - WOOD!  Yes, all wave guide parts are of voidless laminated hardwood, effectively inert, structurally and acoustically superior to cast or molded wave guides.

                                                                                                                                                                              B.  Our "Unconventional" 2-12, 3 Component, Two Way Line Array

            Also Solves Vertical Control Deficiencies

In addition to addressing and improving component control in the horizontal plane, we focused much attention to developing specific models with superior vertical directivity performance. Conventional vertical line arrays to date have proven to be the most accepted mechanical method to improve vertical control.  Unfortunately conventional arrays possess  inherent deficiencies, such as phase cancellations between common drivers above and below  the vertical axis center point.  Our Dalbec LQt model 2-12 DC, three component, 2-way enclosure configuration, when utilized in conjunction with a proper loudspeaker management processor, virtually eliminates vertical cancellation errors, exhibiting  vertical

Cylindrical wavefront characteristics  with point source fidelity.

 

C.        General Misc. / Details

            1.         Driver Component Selection

The source of radiation is of utmost importance in realizing faithful, reliable operation, and we utilize the best components available, which are specifically manufactured to our exacting specifications.  Our decades of field testing raw components from vendors around the world has yielded a large database of the best performing drive assemblies regardless of cost.  From our experience, most manufacturers of premium drive components don't seem to produce very good finished loudspeaker products.  Likewise, many of the names associated with premium professional loudspeaker assemblies don't produce their own drive components either.

 

            2.         Architectural & Aesthetic Considerations

Our finish department is able to provide a wide variety of custom appearances.  Although standard enclosures include black, or white in a textured satin finish, or natural birch, we can finish in any furniture grade in either satin, or full gloss clear coat.  In addition to the wide variety of optional finishes, the grilles can be custom painted or covered in a wide range of available colored acoustic fabric. Additionally, all of our components are available in weather resistant packages from high moisture to full exposure conditions.

 

 

 

[ 20 of 20 ]