WELCOME
. . . to the Coustic world of power and clarity. These new Coustic 321QE and 481QE
Besides their sleek contoured design, the new 321QE/481QE power amplifiers offer the latest and most sophisticated audio features. This manual offers you a guided tour of all these exciting features. For the best sonic reproduction, please follow the installation suggestions and recommen- dations as closely as possible. The time you spend will prove to be worthwhile when you sit back and enjoy the high fidelity music!
To further explore the potential of your Coustic amplifier, we recommend you match it with our dynamic
Whatever you need for your ultimate car audio system, look to Coustic - for a wide range of car audio components to meet the most critical demands.
Coustic . . . a sound investment.
No part of this publication may be reproduced, stored in a retrieval system or transmitted, in any form or by any means, electronically, mechanically, or otherwise, without the prior written permis- sion of Coustic or Mitek Corporation.
Please take a moment to register your purchase on line @ coustic.com.
Please also record the serial number of your amplifier in the space provided below and keep this manual for future reference, as well as your sales receipt as proof of ownership. (The serial num- ber of your amplifier is marked on the bottom of its metal chassis.)
Serial Number:
Date of Purchase:
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FEATURES
An electronic crossover has many advantages over passive crossovers - lower cost, simplified yet more flexible system design, lower distortion and higher gain structure. The 321/481QE power amplifiers are equipped with
OVER-CURRENT, SHORT CIRCUIT AND DC OFFSET PROTECTION
The sophisticated circuitry monitors abnormal conditions such as voltage spikes, oscillation, DC off- set or short circuit. When any of these undesirable conditions exceed their respective preset limits, the circuit will shut down the audio system briefly and lights up the protection indicator to identify the problem for immediate attention. Once the problem is resolved, the amplifier will resume oper- ation automatically.
HIGH SPEED HIGH CURRENT MOSFET SWITCHING POWER SUPPLY
High current MOSFET transistors are used in the power supply section to minimize internal heat and maximize reliability. Furthermore, the combination of the very high
TRIPLE DARLINGTON HIGH CURRENT/HIGH VOLTAGE FULLY COMPLEMENTARY OUTPUT STAGE
Complementary output stage audio circuitry has long been a hallmark of "exotic" home amplifier design. Coustic is one of the very few car audio manufacturers to incorporate such elaborate audio circuitry into its power amplifiers. Triple Darlington configuration ensures the audio amplifier is always operating at its optimum conditions.
LINE OUPTUTS
The
WIDE RANGE INPUT SENSITIVITY ADJUSTMENT
The input sensitivity level of the Coustic 321/481QE amplifiers can be easily varied from as low as 100 mV to as high as 5.0 volts by adjusting the control on the Input Panel.
LINE LEVEL AND SPEAKER LEVEL INPUTS
These ampliifers feature
ADJUSTABLE BASS BOOST
This feature allows you to enhance the bass performance of your sound system. The control is con- tinuously variable with a maximum boost level of 18dB.
REMOTE SUBWOOFER GAIN CONTROL PORT (R S)
The 481QE amplifier has a
R S remote control, the subwoofer output level can be adjusted to compensate for bass fluctuations in a moving vehicle.
MULTI-FUNCTION PROTECTION INDICATOR
When the red protect indicator lights up it signifies a high operating temperature is detected and the amplifier is temporarily shut down to allow for a cooling period. As soon as the temperature returns to a safe level, the amplifier will restart and resume normal operation.
This indicator also lights up when the amplifier detects either an
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