Alto D4 Посібник користувача - Сторінка 9

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12 LOW FREQUENCY FILTER

This Filter rolls off audio signals below 30Hz. In this way bass performance will

be improved, because the subsonic motion of the cone will be cut out and more

power is made available to the woofer in the audible range of frequencies. If you

want our view: Keep the Filter ON most of the time unless you are filtering the

signal before the input of the amplifier . Especially vented speakers (bass-reflex)

are very sensitive to subsonic frequencies (below 30Hz).

13 OUTPUT MODE SELECTOR

The D series power amplifier presents three operating modes:

- Stereo Mode

In this mode, CH A and CH B operate independently (as a normal stereo amplifier)

The CH A input signal will be output from the CH A output connector , and CH B

input signal will be output from the CH B output connector .

- Parallel Mono Mode

In this mode, CH A input signal will be output from the output connectors of both

channels. Detail wiring diagram you can refer to chapter 4.

- Bridged Mode

In this mode, CH A input signal will be output from the bridge-mono output connector .

Detail wiring diagram you can refer to chapter 4.

14 COOLING FAN

This fan secures enough cooling for your amplifier . The airflow is front-to-rear . The fan

speed is electronically regulated depending on the temperature of the power devices.

3. CONTROL ELEMENTS