Originally Posted by gandt154
Hi I posted the question about integrating an oppo to power amp direct connection with my av amp above and got some good feed back. But it suddenly occurs to me that the Oppo has five channel analogue out and my amp has five channel in for SACD multichannel I guess. Can I connect the XLR direct to a power amp and just connect the other channels for centre surround etc into the av amp would that work/ sync?
If I understand, you want to use a 2-channel power amp (fed via XLR from the OPPO) for Left Front / Right Front, and a 5-channel power amp (fed via RCA) for Center, Left Surround, Right Surround, Left Rear, and Right Rear.
That will work. Set Stereo Signal FRONT LEFT/RIGHT to configure the XLR outputs correctly.
There won't be a sync issue between the combined XLR and RCA outputs for audio and the video output, but you do need to be aware that the XLR outputs, by spec, are +6dB hotter than the RCA outputs. Your 2-channel amp with the XLR inputs may compensate for that by default (or via a switch setting). Be sure to check all the speaker levels match using a calibration disc -- such as the LCPM test tracks from AIX Audio Calibration, Blu-ray, and an SPL (sound pressure level) meter.
Once the levels are trimmed to match, the Volume control in the 105 will affect the RCA and XLR outputs equally.
As always when doing direct connection to a power amp -- i.e. without a pre-amp in between providing buffering -- the specs on the power amp are crucial as to whether this will sound OK -- in particular, its input impedance. In your case you'll need to check this for both amps.