US Amps AX owner manual Did You Buy the Right U.S.Amp?, Installation

Did You Buy the Right U.S.Amp?

There is a U.S.Amp for every purpose! From raw power to exquisite sound quality and everything in between, U.S.Amps offers state-of-the-art technology to meet your every need.

INSTALLATION

Amplifier Mounting: Choose an appropriate location to mount the amplifier(s). Make sure your choice is free from excess heat, moisture, and vibration. Under the vehicle seat or in the trunk are common mounting locations. Be sure the amplifier receives adequate ventilation to its heat sink and is positioned away from flying luggage and people’s feet. Do not mount to the speaker enclosures.

Ventilation: It is important to provide the amplifier with adequate ventilation to remove heat from the amplifier heat sink. During high performance applications, in which the amplifier may be exposed to extremely low impedance loads, it may be necessary to provide external ventilation via a fan or some other means. With proper ventilation, the "run time" of the amplifier between thermal protection cycles can be greatly extended.

IMPORTANT NOTICE

The Input of a U.S.Amp MUST be GROUNDED for proper amplifier operation.

The use of external ground isolation dividing devices is UNNECESSARY and may cause severe amplifier and/or system damage.

Amplifier Input: U.S.Amps feature a unique isolated input section that will accept signal voltages from 1 to 9 volts. The input section also provides amplifier ground isolation for the prevention of system and engine noise. The unique configuration of the U.S.Amps input necessi- tates a correct input ground, and is not compatible with external ground isolation devices.

Signal Level (BTL) Input: This product will accept line and signal level, and can be used with most BTL "high powered" sources. To use a BTL source, observe the following:

1)BTL outputs have two "hot" non-grounded leads per channel. Select ONE per channel, and connect it to the “center conductor” of the RCA input cables going to the amplifier input.

2)Insulate and disregard the second wire of each BTL output pair.

3)Ground the shield wires of the RCA cable to the metal body of the source unit.

Gain Control Adjustment: Always start with the gain control fully counter-clockwise (all the way down), or just slightly open. Adjust the source unit volume as high as possible without distortion. Increase the amplifier gain until the amplifier distorts, then turn the gain down slightly until the signal becomes clear. It is desirable to operate the amp at the lowest possible gain setting to help reject spurious system noise.

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