Martin Audio Portable Speaker AQ28 User Manual

AQ28  
Two-way passive reflex with dual bass drivers  
PRELIMINARY DATA  
features  
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Compact two-way passive system  
Dual 8” (200mm) long-throw bass drivers  
Extended LF performance  
User rotatable 90º x 50º horn  
High power output  
Five year limited warranty  
applications  
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Restaurants and bars  
Theatres  
Cruise Ships  
The AQ28 is a two-way, dual-bass driver, passive loudspeaker  
designed to give extended LF performance from a compact,  
architecturally neutral, vented enclosure. It features dual  
8”(200mm) long-throw, 2”(50mm) coil direct-radiating bass units  
and a 1.7”(44mm) diaphragm, 1”(25mm) exit compression driver,  
mounted on a proprietary, rotatable 90° x 50° constant directivity  
horn.  
Below 250Hz both LF drivers operate together whilst above  
250Hz only the upper LF driver is used to reproduce frequencies  
up to the crossover point. This technique avoids the uneven polar  
response which would occur if both drivers were operated over  
the same frequency band. The LF drivers are also fitted with flux  
demodulation rings, which reduce intermodulation distortion, in  
order to preserve midband clarity at high signal levels.  
technical specifications  
TYPE  
Two-way passive reflex with dual bass drivers  
FREQUENCY RESPONSE (5) 60Hz-18kHz 3dB  
DRIVERS  
2 x 8” (200mm)/2” (50mm) voice coil LF drivers  
1” (25mm) exit HF compression driver  
300W AES, 1200W peak  
RATED POWER (2)  
RECOMMENDED AMPLIFIER 400W-1000W into 4 ohms  
SENSITIVITY (6)  
MAXIMUM SPL (7)  
NOMINAL IMPEDANCE  
DISPERSION (-6dB)  
CROSSOVER  
95dB  
120dB continuous, 126dB peak  
6 ohms  
90º horizontal, 50º vertical  
2.5 kHz passive  
ENCLOSURE  
FINISH  
PROTECTIVE GRILLE  
CONNECTORS  
FITTINGS  
20 litre, 15/18mm MDF  
Textured light grey paint  
Grey perforated steel  
Low profile 20 amp push-lock  
6 x M8 inserts for bracket  
2 x M8 inserts for safety point  
(W) 258mm x (H) 660mm x (D) 255mm  
(W) 10.2ins x (H) 26ins x (D) 10ins  
19kg (42lbs)  
overall dimensions  
DIMENSIONS  
WEIGHT  
Century Point, Halifax Road, Cressex Business Park,  
High Wycombe, Buckinghamshire HP12 3SL, England.  
Telephone: +44 (0)1494 535312 Facsimile: +44 (0)1494 438669  
All information is Copyright © 2008 Martin Audio Ltd.  
Due to Martin Audio’s policy of continuing improvement, we reserve the  
right to alter these specifications without prior notice.  
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