APART MA246 Datasheet

MA246/-R/-MR
Mixing Amplifier
APart introduces the MA246: an amplifier that brings a new dimension to 100 V zone mixing
amplifiers. This 6-zone unit can be used stand-alone, or as the core of an expandable sound system.
Because the MA246 offers independent source selection for zones 1 and 2-6, it can be used as a
multi-source zoning system. Zone 1 is a fully independent pre-amplified zone and allows the installer
to use an external power amplifier to amplify it. It is especially useful for large areas that require many
speakers, like factory production areas. This has the particular advantage that the installer can use the
external amplifier to suit his power needs for that particular zone.
Zones 2 to 6 can be individually volume controlled using the integrated speaker volume controls.
Zones number 5 and 6 are 70-volt outputs, these are compatible with 100-volt speakers, but by
nature, these outputs will have a slightly reduced output level, meant for the 'quiet' zones in a multi-
zone system.
MA246 has four balanced inputs on Euroblock. Microphone input 1 is optimized to be used with our
MICPAT-6, a selective 6-zone paging microphone, designed especially for use with the MA246. This
microphone is the master microphone. Maximum five of these microphones can be switched in
parallel on this single input!
Microphone inputs 2 - 4 are designed to be used with our MICPAT-2 (2 zone groups) microphone or
any other microphone depending on the application. On the MA246, you can preset 2 paging
groups to be paged with mic 2 – 4.
Further the MA246 is equipped with 4 line inputs that can be selected via a rotary switch. As said
before, Zone 1 can have a different line source selected compared to zones 2 - 6
There are 6 different priority levels on the MA246. When any priority has been activated, integrated
24VDC supply output (max 0.6A) can switch priority relays of loudspeaker attenuators or other
devices.
In case of mains power failure, the MA246 can be powered via the 24V DC power input. If an
external 24V UPS is connected to the unit, the amplifier will automatically switch to it.
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