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Audio Design Associates
www.ada-usa.com
PTM-3245
www.ada-usa.com
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Rack Mounting Your ADA PTM-3245
When mounted in a in a standard 19" equipment rack, the PTM-3245 chassis and front panel height
occupies three rack spaces (5 1/4" or 176 mm). A single standard rack space allows 1-3/4" vertical inches
in a 19-inch wide equipment rack. This measurement standard was developed by the EIA (Electronic
Industries Association) so manufacturers of electronic components and equipment racks could build
products in standardized heights that would fit in a uniform space.
We strongly recommend that you have someone hold the PTM-3245 in place while you screw it into
the rack. You should use nylon shoulder washers in front and behind the faceplate this will help the
unit from scratching and also prevent ground loops.
Please call ADA if you need additional advice about the placement or mounting of the PTM-3245.
Input Connections to the PTM-3245
The input connections on the rear panel of the PTM-3245 are labeled to correspond to sixteen pairs.
This makes it easy to identify each two-channel stereo zone. Zones 1-8 are located along the top row
and zones 9-16 are located along the bottom row. If you plan to split any stereo pairs for mono operation,
we recommend you keep the mono channels grouped for easy identification.
Required Input Cables:
You will need one shielded interconnect cable terminated with RCA plugs on each for each channel of
the PTM-3245 you plan to use or a shielded interconnect cable for each two-channel stereo zone.
IMPORTANT
NOTE
:
Do not use “directional cables” when connecting the PTM3245 to a controller or
preamplifier. These cables often leave the shield disconnected at one end, which can cause ground loops
and subsequent 60 Hz hum. Directional cables are usually labeled with arrows along the insulation to
identify which end to connect to the source.
Recommendations Before Connecting Inputs
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Leave the AC cord on the PTM-3245 disconnected until you have made all the other
connections
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Make sure that all your cables are long enough so they are not strained or stretched once they
are connected.
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Label the interconnect cable to correspond to the channel of the multiroom controller or preamplifier.
This procedure will save time in case troubleshooting is necessary.