Dual DA1504D Owner's Manual download pdf (Page 8)

The input level control (gain) is used to obtain the

best possible match between the head unit audio

output and the amplifier input. Begin by turning

the input level control fully counterclockwise. Next,

turn up the head unit volume control around 3/4 of

the way up. Adjust the input level control clockwise

until audible distortion is heard, then slightly

counterclockwise to provide the best match.

Repeat for all input level controls.

The crossover is used to filter out frequencies

above or below a certain point. Choose LPF when

using the amplifier with subwoofers, HPF when

using with midrange/tweeter combinations and

FLAT when using with coaxial-type speakers.

Note: Choose FLAT when using the amplifier in

stereo/bridged simultaneous mode. In this mode,

passive crossovers are required. Failure to use

the correct passive components may damage the

amplifier and/or speakers. Consult a qualified

professional for recommendations.

This control allows precise adjustment of the

crossover frequency.

This control provides additional boost @ 45Hz

when used with subwoofers. Adjust this control

with caution - as improper use can damage

speakers!

Setting this control to the desired frequency will

limit harmful frequencies below the setting from

going to the subwoofer(s), preventing possible

damage from frequencies that subwoofers are not

designed to handle.

The green LED indicator illuminates during normal

operation (POWER) and the red LED indicator

is visible when the amplifier detects a fault

(PROTECT).

Input level Control

Crossover Mode

Crossover Frequency

Control

Bass Boost

(DA1000D)

Subsonic Filter

(DA1000D)

LED Indicators

INSTALLATION

Configuration/Setup

1 2 3 4 5 6 7 8 9 10 11 12

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Dual DA1504D Owner's Manual Page 8

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