[Art Lloyd]

Neighbor has a newly assembled front projection HT. When his subwoofer plays loudly the receiver shuts down. I have no idea why this happens. It is not a matter of the circuit breaker. The receiver goes into its idling mode. Does anyone have an idea what might be the cause?

 

[Knucklehead90]

Is the sub a passive one? If the receiver is powering the sub that may be a problem. If it's connected via an RCA cable try using a different cable.

Listing the brand and models involved would certainly be helpful.

 

[Art Lloyd]

Active sub. Will check brands. He used RG6 for in-wall line level. If he has screwed up the RG6, shorting it, wouldn't the receiver shut down whenever it was powered up with LFE output, not just with high levels?

 

[jdsmoothie]

As the LFE is only a low level signal, it's unlikely it has anything to do with the LFE, rather it's more likely some kind of short in the line that is feeding back to the AVR.

 

[Steve.]

The first thing I would do is disconnect the RG6 from both the receiver and sub. Crank up the system with no sub. Does it cut out or go into protect mode? If not try a different sub cable, the in wall RG6 may have a short. If it cuts out with no sub at high volumes he probably has some shorted speaker wires at the receiver or speaker side.

 

[M Code]



Quote:
Originally Posted by Art Lloyd /forum/post/18115836


Neighbor has a newly assembled front projection HT. When his subwoofer plays loudly the receiver shuts down. I have no idea why this happens. It is not a matter of the circuit breaker. The receiver goes into its idling mode. Does anyone have an idea what might be the cause?

A couple of things to check..

Are the subwoofer and AVR connected to the same AC outlet circuit?


If YES, then the subwoofer when a heavy bass signal hits may be drawing down the AC line voltage. If the AC voltage to the AVR sags enough just for a split second, then the AVR may go into Stand-By. This also could happen if the house has older electrical wiring, with lower current capability. Additionally if some other applinace or component is connected to the same AC line circuit this may cause the voltage to sag as well.


Just my $0.01..