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4
Connection Precautions
Disconnect the AC cord before making or changing any input, trigger, or speaker wire connec-
tions. Make sure there is no strain or tension on any wires that could cause them to pull loose.
Audio In Jacks
Connect the cables from your preamplifier or multi-room controller’s output jacks to the Model
5125’s channel 1-5 audio Input jacks. Gain is 29, fixed at THX Ultra2 Reference level, 1V input =
28.28V output.
Use channels 1 and 2 for your left front (L) and right front (R) channels. This will assure correct
operation of the auto turn on audio sensing, should you choose to use it. Here is why:
•
When you listen to a stereo source your surround controller will have audio signals only at its
left and right channel output jacks. The other channels won’t receive an audio signal for the
Auto Turn On circuit to sense.
•
Even if you always listen in a surround mode, the center and surround channel sound levels
aren’t high enough, on a consistent basis, for the auto turn on audio sensing.
5.1 Channel Connections
We recommend these connections:
5125 Input jack
5125 Speaker Terminal
Connects to Surround Controller’s Output:
Connects to:
Channel 1 Left or L channel
Left front speaker
Channel 2 Right or R channel
Right front speaker
Channel 3 Center, or Ctr channel
Center speaker
Channel 4 RS or Right surround channel
Right surround speaker
Channel 5 LS or Left Surround channel
Left surround speaker
7.1 Channel Speaker Connections
If you plan to use your 5125 in a 7.1 system you will need to use a two channel power ampli-
fier for the two additional speakers. You have two hookup options which depend on the quality
of the separate two channel power amplifier. We recommend using the better amplifier for the
left and right front speakers because their sonic contribution to your listening is more significant
than the surround back channel speakers.
