APart MA60 [10/28] Mixing amplifiers

Mixing ampliﬁers

test button) on the paging mic input. Typically, 24 volt priority is

used to override volume controllers present on speaker lines.

7. Auto standby: set the switch to “enabled” to enable auto

standby.

8. Input 2: line level input on RCA connectors. Adjust the gain

potmeter so that the clip led does not light up when the signal

is at its highest level.

9. Pre-out: the pre-amp output carries the same line level signal

that is being fed to the power ampliﬁer, i.e. the signal level is

determined by the position of the master volume control.

10. Mains inlet and mains power switch: connect the mains power

cord here. Switch on the power switch to power up the unit.

The mains fuse is also located here.

Note: emergency switch and the paging contact (and the chime

test button) will mute all lower priority input signals. MIC vox

will attenuate all lower priority input signals by 30 dB. This is also

known as “voice over circuit”.

The chime can only be activated by closing the paging contact (and

the chime test button) on the paging mic.

As long as the chime sounds (approx. 2 sec), the paging message

will be muted, even if the chime level is set to the minimum (off)

level.

When the priority output is activated and loaded with full power

(24V, 0.5A), please use at an interval of at least 10 minutes and

each time no less than 1 minute.