Pioneer VSX-LX505 Power Remeasurement

[EWL5]

I laughed at the last comment.
I really did shop for avrs and test most of the major commercial lines..including an integra, the 503, and an rz70 that sat in the box. My thought was if you were new to home theater the Onkyo/Pioneer products would be hard to pass up. But once you try a mid level Denon product you cannot really go back. I am not putting an avr like the rz line down. Its just that the Denon line is simply designed better. I remember using the 503 and thinking it did not make sense that you could not adjust the crossovers individually. You had to chose between 80, 100, 120 etc. I did not experience the limp mode but as somebody pointed out the average user would have to pay attention. I think user education is vital for people who want to get the best use out of thier avrs. The more educated I became, the more spending the extra money on the Denon made sense.

Agreed that most people can’t tell and are none the wiser using the 2021 PAC products. The irony is some people can tell but don’t believe the “limp mode” exists.

 

[buckaboo49]

Without unplugging or resetting the AVR, what happens when you set the speaker impedance to "4 ohms" in the AVR instead of the default "6 ohms or above"? Let us know if you still get the pop.

Feel free to unplug and replug the AVR after the above test is finished and see if you hear a difference.

I just did your test and still got the same pop. I thought at first it was the Apple TV but it seems to do it on other sources too. It does seem to be an input sound format issue. If I leave the Apple TV turned on and the Apple TV happens to have the screensaver up if I power off the receiver and back on again it doesn't pop.

 

[peng]

I just did your test and still got the same pop. I thought at first it was the Apple TV but it seems to do it on other sources too. It does seem to be an input sound format issue. If I leave the Apple TV turned on and the Apple TV happens to have the screensaver up if I power off the receiver and back on again it doesn't pop.

Regardless, until you know for sure what's causing it, you should always turn on the source first, then the AVR and the external amp last. Is your external amp trigger on, if so, is it possible to have the trigger delayed a little. The thing is, if the power amp and preamp (AVR in this case) turns on at the same time, you are going to get those pops, how often and how loud would depend on the timing. You previous AVR, a denon did not do that, because its trigger has a delay (assuming you were using the trigger). I never had pops like that with any of my Denon or Marantz AVRs/AVPs either, as long as the powering on sequence are done right.

 

[EWL5]

I just did your test and still got the same pop. I thought at first it was the Apple TV but it seems to do it on other sources too. It does seem to be an input sound format issue. If I leave the Apple TV turned on and the Apple TV happens to have the screensaver up if I power off the receiver and back on again it doesn't pop.

Have you tried unplugging, wait 30 sec, and then plugging back in?

 

[buckaboo49]

Have you tried unplugging, wait 30 sec, and then plugging back in?

Yes

 

[popej]

I don't think that any digital input can cause pops. As for AVR itself, it has relays between amps and speakers. After power on, speakers are connected with a delay, after any pops electronic could introduce.
What you can hear are relays clicking inside AVR and pops in speakers caused by idle DC offset of amps. The later should be very quiet. If it is noticable, then maybe amps need servicing.
Relay switching can be caused by changing listening mode, like stereo to multichannel. You can test it by manually switching mode at idle.