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Example Two: Connecting a home theater receiver or other audio source to the amplifier.
Use the stereo pre-amp or auxilary outputs on your receiver and/or component to connect to input 1
(In 1) and/or input 2 (In 2) and/or the dedicated Line Inputs on each channel of the DMA-1240/DMA-1275.
H
ow to Connect and Use the DMA-1240/DMA-1275
In this example, amplifier channels 1-8 are all set to In 1, alternating Left and Right, and so the speakers connected to
these amplifier channels will all hear the source connected to In 1. In this example that source is a music streamer, al-
though it could just as easily have been the variable output of a home theater receiver or some other audio source. Note
that controlling the volume output of the music streamer will simultaneously control the volume heard through all of the
speakers connected to amplifier channels 1 through 8.
A second music streamer is connected to amplifier channels 9 and 10, but again this could have been any audio source
with a variable volume control. If the source does not include a way to control volume, i.e. the output level is “fixed” such
as with a traditional CD player, the speakers connected to channels 9 and 10 would require an attenuating volume control
be connected somewhere between the amplifier and speakers. This volume control is typically installed in a wall within
the same room as the speakers. Music streamers, however, typically either have their own app for controlling output
volume, or the app for the music service (such as Spotify and Pandora) being streamed through the streamer will include
a way to control volume. In this example, a third streamer is similarly connected to amplifier channels 11 and 12.
In the above example, the speakers connected to amplifier channels 1-12 have been divided into three unique zones,
each with just one source available to it. The first zone likely has speakers spread across multiple rooms, while zones
two and three are likely in separate areas in or around the home. Note that the app for some music streaming devices
allow multiple devices to be grouped together in order to stream the same music service in sync. This means that it is
possible for all three zones to play the same thing at the same time (often referred to as “party mode”), while still retaining
separate volume control within each of the three zones.