Finally got my 990 and 770 plugged in and configed.

However, I am not getting any sound out of the center speaker. The two fronts and sub are working. I haven't hooked up the rear surrounds yet. Ran the auto config and then manually tested. Replaced speaker wire cable and cable from 990 to 770. Plugged the speaker back into the old amp and it worked.

Am I missing something paingfully obvious?

You've confirmed that your center speaker itself is not broken.

I'd try to isolate the problem by performing the following tests:

• Confirm the center line and center speaker cables are functional by swapping them with the left front. In either case the left front speaker should still function. If not, the cables are suspect.
• Route the left front out from the 990 to the center front input of the 770, and confirm whether there is output from the center speaker. No output suggests that the center front amplifier section of the 770 is suspect.
• Route the center line out from the 990 to the left front input of the 770, and confirm whether there is output from the left front speaker. No output suggests that the center output of the 990 preprocessor is suspect, or there is a 990 settings problem/conflict.

The manual calibration mode menu might be useful for these tests because they allow you to route the calibration signal to a particular speaker from the 990 itself.

I had a ton of problems getting the locking RCAs to work proberly since they are so close together and are locking cables which require tight connections. Try unplugging and replugging the cables and you may have success. I was missing my left channel and eventually got it plugged tightly and everything was copasetic (sp?).

Thanks for the input. I will try reconnecting the cables tonight and testing the speaker again. Just seems odd that everything else seems fine but that speaker is not working when it worked fine just before I moved it to the new amp.