Installation and Mounting

INSTALLATION STEP 3

1. AMPLIFIER LOCATION

The REFERENCE404s amplifier employs highly efficient circuitry and a unique ChassisinkTM design to maintain lower operating temperatures. Additional cooling may be required if the amplifier is located in a tightly confined area or when driving especially low impedance loads at extremely high levels.

When mounting the amplifier, it should be securely mounted to either a panel in the vehicle or an amp board or rack that is securely mounted to the vehicle. The mounting location should be either in the passenger compartment or in the trunk of the vehicle, away from moisture, stray or moving objects, and major electrical components. To provide adequate ventilation, mount the amplifier so that there are at least two inches of freely circulating air above and to the sides of it.

2. SWITCHES

Set the Coherent StereoTM/ Bridged Mono / Mixed Mono and Channel 3 & 4 input switches to the appropriate positions (see pages 14 - 17).

3.MOUNTING THE AMPLIFIER

a.Using the amplifier as a template, mark the mounting surface.

b.Remove the amplifier and drill the holes.

c.Mount the amplifier to the surface using the provided hardware.

4.WIRING

a.Run and connect the audio signal and remote turn-on cables to the amplifier from the source unit.

b.Carefully run the positive cable from the amplifier to a fuse or circuit breaker within 18” of the battery.

c.Connect the fuse or circuit breaker to the battery. Leave the circuit breaker off or the fuse out until everything is bolted down.

d.Secure the ground cable to a solid chassis ground on the vehicle. It may be necessary to sand paint down to raw metal for a good connection.

NOTE: There may be a small spark when connecting the power and ground lead to the amplifier for the first time. This is caused by current rushing into the amplifier to charge the power supply capacitors, and is completely normal.

e. Double check each and every connection! f. Re-connect the fuse or circuit breaker.

5. POWER UP

Power up the system and look at the red "High Power" LED. There may be a

INSTALLATION STEP1

COHERENT STEREO™ /

MIXED-MONO / BRIDGED MONO

The REFERENCE404s amplifier has the ability to operate in any one of the following modes:

Coherent Stereo™ with identical left and right stereo channels for maximum fidelity. Best choice for satellite speakers. Use this mode unless Mixed-Mono is necessary.

Mixed-Monoin order to drive stereo and mono simultaneously; works well for center channels. It can be used anytime you need a summed mono channel. Somewhat sacrifices sonic accuracy as additional circuitry is introduced to one channel. In Mixed-Mono, the left channel is inverted, see diagram below or on the bottom of the amplifier.

Bridged Mono for dedicated single channel operation; ideal for driving subwoofers. It is also used when large amounts of power are necessary for single speakers. In bridged mono, only the right channel input is active.

In bridged mono, only the right channel input is active.

NOTE: If you intend to drive the REFERENCE404s amp in mono but have stereo outputs from your crossover or source unit, you can put the switch in Mixed-Mono but follow the normal wiring for Bridged Mono.