Ashly MA-500.8 Manual de instrucciones - Página 8

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MA Amplifier • Operating Manual

Rear Panel Features

5.1

Audio Inputs

Balanced Input

Euroblock connectors

(3.5mm) are used for

wiring input signals.

If using unbalanced

(single-ended)

inputs, connect

the signal wire to the (+)input pin, connect the

shield wire to the (-) input pin, and optionally

use a piece of wire to link between the (-) input

pin and the G pin.

5.2

Remote VCA Level Control Input

Every input channel has a

potentiometer circuit available

for remote DC level control of

that channel. The illustration to

the right shows proper wiring

per channel. Shielded wire is not

required, and there is no limit to

wire length. Do not use any other

ground source. If multiple remote DC level controls

are used for different channels, the same ground

and V+ sources can be shared.

5.3

High Pass Filter DIP Switch

An 80Hz 2nd order hipass filter is independently

available on every channel to reduce low

frequency content going to a speaker.

5.4

Clip Limiter DIP Switch

The clip limiter prevents an amplifier channel

from sending clipped audio to the speaker.

When the clip limiter is enabled, input signal

level is automatically attenuated whenever the

full rated output power is exceeded.

5.5

Output Mode DIP Switch

Output mode

for amplifier

channels can be

set as shown for

low impedance,

25V, 70V, or

100V output

using the pair of

DIP switches assigned to each channel.

5.6

Bridge Mode DIP Switch

This switch places the indicated

channel pair into bridge mode,

combining two amplifier outputs

for more power to a single speaker

load. Bridge mode uses only the odd

numbered input and level control,

disabling the even numbered input

and level control for that channel

pair. Speaker outputs in bridge

mode must be wired differently, as

shown on the back of the amplifier

and in section 5.11.

5.7

Utility DIP Switch Functions:

5.7a

Standby Polarity

The Standby Polarity DIP

switch sets the polarity

requirement for placing the

amplifier into standby using

the STBY contact closure

connector. When standby

polarity switch is set to N/O

(DOWN - normally open), the

amp goes into standby whenever the

STBY to GND circuit is closed. When

standby polarity is set to UP, or N/C

(normally closed), the amp goes into

standby whenever the STBY to GND

circuit is open.

5.7b

Front Panel Disable

The Front Panel Disable

DIP switch de-activates all

front panel level controls

and power switch when

in the UP position. NOTE:

Disabling the front panel

controls does not disable

the VCA remote DC level

controls.