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In Reply to: AV System vs Audio System posted by Afonso on October 31, 2001 at 14:55:04:
If the Onkyo has preamp outputs, you can use the tape loop in the Plinius, assuming it has one. In my system, I have an Audio Research preamp driving two channels of a Bryston 5B-ST in stereo mode. In home theater mode, I turn on the tape monitor switch on the preamp. The tape outputs are hooked into an input on my Marantz AV-9000 preamp/processor. The signal goes into the Marantz for Dolby Pro-Logic processing, and then comes back into the preamp after being processed. It then goes out to the amplifier to provide the sound for the left and right front channels, with the mono center channel information having been subtracted back in the Marantz. The thing is that you need to have the volume control on the preamp always set to the same position whenever you put it into home theater mode (I set mine at 12:00 when I initially calibrated it and put it back at that position whenever I do this).Todd
Follow Ups:
Todd,Let me see if I understood, because I'm a little bit confused...
First of all, I think you’re trying to say, "The tape inputs are hooked into an output on my Marantz AV-9000 preamp/processor" instead of "The tape outputs are hooked into an input on my Marantz AV-9000 preamp/processor", correct?
Second, what do you mean by "tape loop"?
At last, assuming that you are talking about inputs in the preamp, why using Tape instead of Tuner or Video input?
Thanks for your help,
Afonso
No, the tape outputs on the preamp are hooked into an input on the Marantz preamp/processor (I use the CD input on the Marantz, which is available because my CD player is connected to my Audio Research preamp). Then the left and right preamp outputs on the Marantz are connected back into the tape inputs on the Audio Research preamp.This is an example of a tape loop, in which the audio signal is sent out of the preamp for processing, in this case, for Dolby Pro-Logic processing, but tape loops are more commonly used to connect in a graphic equalizer. The processed signal reenters the preamp through the tape inputs. However, not all high end preamps have this feature. When I bought it, my Audio Research LS-3 may have been the only one in their lineup that had it, as I recall.
My preamp has a switch on the front that toggles between monitor and source. When it is switched to source, the unit functions normally. When it is switched to monitor, the signal is diverted out the tape outputs to the processor and then comes back through the tape inputs. In this case, the center channel and out of phase rear channel info has been subtracted by Dolby Pro-Logic processing, leaving just the front left and right channels to go to back through the volume control and to the amplifier.Todd
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