EXONIC EX 680M User Manual

EX 680M

* Monoblock Subwoofer Amplifier

* 2 ohm Stable

* Variable LPF / Bass Booster / Subsonic Filter

* Remote Gain Control

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EEXX 668800MM

INTRODUCTION

Our Amplifiers provide high-performance sound reinforcement for your mobile audio
equipment. Its versatility enables compatibility with optional Equalizers, Frequency
Dividing Network Crossovers, and other audio processors in a customized system. The
Multi-Mode bridging capabilities allow flexibility in hosting several different speaker
configurations.

To achieve optimum performance, We suggest that your stereo components are installed
by an authorized Ample Audio dealer. It is highly recommended that you read this Owners
Manual before beginning installation.

FEATURES

Mosfet Power Supply
RCA Input and Output
Adjustable Input Sensitivity
Variable Subsonic Filter 10-60Hz 24dB/Octave
Lowpass Crossover 30 - 250Hz 12dB/Octave
Variable Bass Booster 0-18dB 45Hz
Remote Gain Control
Bare Wire Set Screw Terminal Block
Thermal/Short/Overload Protection Circuitry

WARNING

High powered audio systems in a vehicle are capable of generating “Live Concert” high
levels of sound pressure. Continued exposure to excessively high volume sound levels may
cause hearing loss or damage. Also, operation of a motor vehicle while listening to audio
equipment at high volume levels may impair your ability to hear external sounds such as;
horns, warning signals, or emergency vehicles, thus constituting to a potential traffic
hazard.

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EEXX 668800MM

PLANNING YOUR SYSTEM

Before beginning the installation, consider the following:

a. If you plan to expand your system by adding other components sometime in the

future, ensure adequate space is left, and cooling requirements are met.

b. Should you use high or low level inputs?

Your Amplifier has been designed to accept either High-Level(

speaker outputs

from your radio

) or Low-Level (

Pre-Amp outputs from your radio)

signal source.
If your radio/source is equipped with Pre-Amp outputs, it is possible to utilize them
to drive the Amplifier and connecting (

Amplifier

) to the 2 rear speakers.

Then, use the built-in power of your radio to drive the 2 front speakers.

NOTE :
Distortion level is considerably lower from Pre-Amp (Low Level) outputs,
than speaker(High Level) outputs.

c. Are your components matched? The peak power rating of your speakers must

be equal or greater than the Amplifier’s. They also must be 2 - 8 Ohms impedance.

(This information is normally printed on the speaker magnet)

d. Consider both the length of your leads, and routing when determining the

mounting location. Pre-Amp input Jacks require a length

(depending on location)

of high quality shielded male to male RCA patch cord.

MOUNTING YOUR AMPLIFIER

The mounting position of your Amplifier will have a great effect on its ability to dissipate
the heat generated during normal operation. Ample Audio has designed the heatsink for
maximum heat displation and also designed with a thermal shut down protection circuit,
making it reasonably tolerant of mounting variations. Any configuration which allows
moving air to be directed over the cooling fins will improve heat dissipation dramatically.
DO NOT enclose the amplifier in a small box or cover it so that air cannot flow around fins.
Temperatures in car trunks have been measured as high as 175 F (80 ) in the summer
time. Since the thermal shut-down point for the Amplifier is 185 F (85

), it is easy to see
that it must be mounted for maximum cooling capability. To achieve maximum
advantage of convection air flow in an enclosed trunk, mount the amplifier in a vertical
position, on vertical surface.
Cooling requirements are considerably relaxed when mounting inside the passenger
compartment since the driver will not often allow temperatures to reach a critical point.
Floor mounting under the seat is usually satisfactory as long as there is at least 1 inch

(2cm)

above the Amplifier’s fins for ventilation.

a. Select a suitable location that is convenient for mounting and is accessable for wiring

with ample room for air circulation and cooling.

b. Use the amplifier as a template to mark the mounting holes. Remove the

Amplifier and drill 6 holes. USE EXTREME CAUTION, INSPECT UNDERNEATH
SURFACE BEFORE DRILLING.

c. Secure the Amplifier using the screws provided.