Here is my equipment:

Yamaha R-V1105 Receiver
2 x Fronts B&W DM302
B&W CC3 Centre Channel
2 x RearsB&W DM305
Infinity BU-1 using the low end RV inputs - (right and left feeding into a Y connector for a single input to the reciever's subwoofer input)

What is happening is when I play a strong bass movie, such as the opening scene in Saving Private Ryan, the receiver turns off when it hits a scene with lots of bass. It will do the same thing with other movies that just have a short scene with strong bass too. Now if I keep the volume low, it will not turn off the receiver (below 1/4 of a turn). But if I turn up the volume about 1/4 of the way up to feel a little rumble in the floor, that's when it turns the receiver off.

Anyone got any ideas for me?

My first thought was that you are overdriving the amps and the receiver’s protection circuit is shutting down the unit. But your speakers are pretty efficient, so unless you are listening at absurd levels, that scenario seems unlikely. Perhaps there is a malfunction w/ your receiver.

A few things to check:

• Recheck all of your wiring to ensure no bare wires are touching or might touch from vibration.
• Ensure the receiver has adequate ventilation.
• If you are using the “large” speaker setting, temporarily set it to “small” to see if the problem persists—if this eliminates the problem, you are probably overdriving the amps.

Well, I did three things:

1) Checked for wiring touching - nope
2) Changed the Front speakers to small
- Rear was already set at small
3) Decreased the Subwoofer to -5 db. Had it at 0db.

And now it works. Now how can I resolve the "overdriving the amps" or am I just stuck due to my receiver?

BTW: Thanks for the quick and simple response. This receiver has glitches to it, from what I remember reading about it 3 or 4 years ago on hometheaterforum.com.

Well it’s possible that there is a malfunction in your receiver; perhaps the power supply (or other component) is not performing to spec. You would have to take the unit in for service to determine if this is the problem.

It is also conceivable that the amp cannot deliver adequate power to drive your speakers. Bass requires more power than higher frequencies, which is why changing the setting to “small” may have resolved the problem. I’m not familiar w/ your equipment; just based on paper specs, though, you s/d have sufficient power.

If you decide to keep the “small” setting, you may need to readjust your sub settings to achieve a proper balance. Good luck.