speaker is fixed, now a new problem

pmckeealaska

I got back my LSi25 from Polk and it sounds great. It was causing my amp to go into protection mode, but now it's fine. However, I have a new problem. When in two channel mode (either listening to a cd or watching satellite tv) the sound drops out and I have to turn my reciever off and back on to get sound again. Then later on, the receiver froze up and would not respond to commands at all. When I'm in surround mode, all is well it and it sounds great. I had my amp serviced at the same time as the speaker from an authorized dealer and they replaced the protection circuits, but could find nothing wrong otherwise, so I cant see how it could be a problem with the amp. The fact that the reciever "freezes up" tends to make me think that that is where the problem is. I spoke to NAD technical assitance and they had me do a factory reset, but the problem resurfaced after about an hour. I unlpugged the receiver for 5 minutes and did it again after about 1.5 hours, then I turned it off and on again and all was well for the last 3 hours before I went to bed. Does everyone agree that it is the receiver? If so, I have found out the address of an authorized NAD repair facility in Seattle and will send it in for inspection as soon as I'm convinced that is where the problem is. Thanks for any help!

amulford

Sounds like the receiver to me, man...

danger boy

there could be a short or something in your speaker wiring.. check the speaker wires in the back of your amp. make sure they are not touching the metal or something like that.

It does sound like a recevier problem though.

McLoki

Reverse the right and left channels at the reciever. If the problem stays with the same channel, its the reciever. If it stays with the speaker, call polk cs.

Michael

pmckeealaska

OK...I'm a little confused here. The two main speakers are plugged into a 2 channel rotel amp (which I had serviced just recently to make sure there were no problems with it after my recent speaker breakdown). When you say check the speaker wires in the back of my amp, do you mean the subwoofer amps on each of the speakers or do you mean the back of the Rotel? In terms of isolating a particular channel, I'm not sure what good that would do in answering the question, as it is not a particular channel where the problem arises, only when I'm in a partucular playing mode (DVD 2 channel or satellite). The fact that everything is fine in surround mode, makes me think that it is the receiver, since the amp is still powering my mains when I'm in surround mode as well as in 2 channel.

McLoki

either at the reciever or at the amplifier swap the right and left channels. play a movie and see if the problem stays with the same channel or moves with the speakers.

I was thinking it could be something with the low impedance of the speaker that is causing the amp to shut down, crossover of the speaker causing a lower impedance than it did before or a problem with your reciever. (when you play multi channel, does it have the same problem in dts as with Dolby digital?) Does it have the same problem if you plug the speakers directly into the AVR (not using the amp)?

there were quite a few changes made, (speakers and amp) - don't be to fast to blame the only thing that hasn't been in for repair yet...

Michael

amulford

Nah, it is your receiver, man. It only does it in certain modes, right? That tells me the problem is there, not in the amps or the speakers.

I would send it in, do you have a spare to use in the interim?

pmckeealaska

No amulford, I dont have a spare I can use, but I can deal with the lack of a receiver just to have this problem fixed once and for all. As I said, it only happens in certain modes, and that led me to think it was the receiver. That and the fact that the receiver froze up a couple of times and would not respond to either remote control or "on unit" commands. I had to totally unplugged and plug it back in to get it to work again.

Man, my system has been giving me fits since about mid August. I left to go up to Anchorage for the day, and when I got back, my right channel speaker was meesed up and sending my amp into protection mode after heating it up. I got the speaker fixed, the amp serviced, and everything seemed to be fine at first when I plugged everything back in. Then this damn problem! I don't know if maybe I had a power surge or something that messed with my equipment or what, but this sure has been frustrating. I have everything plugged into a Monster "Power Center" but maybe the thing is useless.


I'll be sending the receiver in for repairs down to Seattle on Monday. I hope that ends the problems.

danger boy

Before you send in the receiver... did you contact NAD.. either by phone or email? Maybe they know of a fix.. how old is the receiver?

It's very odd though that it only happens in two channel mode. What cable are you using to connect your sat recevier to the NAD? How about the DVD player? Which cables audiowise are you using?

pmckeealaska

As i said in my original post, I did speak to a NAD tech. advisor and he had me do a factory reset but it didn't change anything. In terms of cables, I have stock cables connecting my satellite box to the receiver (pretty cheap, but otherwise reliable stuff in the past). All of my other cables are Audioquest King Cobras and my speaker cables are Audioquest as well. I have been very pleased with Audioquest. I really dont think it's a cable issue and the NAD tech said it is most likely the receiver. I've only had it about 3 years, but it is no longer under warranty....bummer!

amulford

i'd get rid of that M POS, too...

pmckeealaska

sorry amulford....what does M POS mean??

danger boy

M = Monster

POS is self explanatory. (sp)

pmckeealaska

In that case....what would be folks suggestions for a replacement of the Monster Power Center I now have??

PolkWannabie

Panamax ...

pmckeealaska

OK, that's 1 vote for Panamax...anyone have any other suggestions?

pmckeealaska

Another thing about my current problem that I should add is that as I'm toggling between modes in the receiver, there is an audible "thump" out of my speakers and I don't think this could possibly be good for them. It also adds to my thinking that the receiver is the problem. I also tried running the speakers directly off of the receiver, bypassing the amp completely, and all I heard out of them was a little bit of sound from the subwwofers, no mids or highs...nothing. I really think the NAD is messed up.

amulford

Another for panamax. There's some other stuff out there. PS Audio has some nice stuff, too.

The reason I say get rid of the M is it will only last for a while. That and I just do not like them (Monster). Yeah, the stuff looks decent, but IMHO I don't think it's as good as they say. I know their cables aren't worth a **** for what they charge, and that is where they made their money. Stands to reason the other stuff follows suit...

Plus it sounds like you got hit, and that POS didn't work. JMO...

WilliamM2

While I'm not a big fan of Monster cable products, the Monster power center is fine. I have both Panamax and Monster power conditioners. The Monster is built just as well, if not better than the Panamax.

cfrizz

He needs to focus on getting his receiver fixed or replaced before he goes & changes something just because of its name & reputation.

PolkWannabie

WilliamM2 wrote:

While I'm not a big fan of Monster cable products, the Monster power center is fine. I have both Panamax and Monster power conditioners. The Monster is built just as well, if not better than the Panamax.

Monster has no regeneration capability ... does it ?

WilliamM2

Don't know about other models, but mine doesn't. Neither do my Panamax's.

amulford

None of them do as far as I know. I just remember reading the M equipment replacement guarantee being for a set amount of time. (Of cousre, it was after I bought it) I don't like that, sounds to me as it's protection degrades after time.

PolkWannabie

WilliamM2 wrote:

Don't know about other models, but mine doesn't. Neither do my Panamax's.

But some Panamax's do ... So do some PS Audio's ...

amulford

My mistake. I thought you meant something different.

Blownrx7

Sounds like the receiver for sure.
Send it in, give a detailed report of the symptoms and make sure they give a detailed report of what they found.

If it was a power surge, and you can get the repair center to say that it at could have been caused by a power surge, you could use Monster's equipment protection warranty - ok, everyone stop laughing - I would love to see Monster own up to a claim.

Maybe this should be another thread but the Monster power stuff is excellent for the "discounted" price - never pay retail...
That being said, one problem with Monster, and I think Panamax too, is that they use what is called "sacrificial" mov's (metal oxide varistors). It may work alll the time but if you get a really big surge, it will blow the MOV(s) and now you will be completely unprotected and the bad part is you may never know it.
That being said, check out the new PS Audio equipment - it addresses a lot of their previus equipment's shortcomings - inefficient, fan noise, superfluous modes (just mho..) expensive - still expensive but not as much as before. No personal experience on the new stuff but much experience on the old stuff and they addressed all my previous issues
I also liked ExactPower until the new PS Audio equipment came out. Good protection, a lot of money but a unique method of power regeneration that is very efficient AND it improves the sound!