Amp heats up and shuts off - Help!!

[msrance]

Your receiver has a downloadable manual at http://www.worldspaceradios.co.uk/celeste-manual.pdf.

I am amazed at your ability to drill out relevant URLs from obscurity. I checked out on the Worldspace.com website - and couldnt find a relevant download - so I just let it be. Thanks for this one Pal!!

There was very little to be found specifically about your Yamaha. The most information I found was at http://www.yamahamusic.com.au/main.asp?sec=products, and that didn't say a lot. There's not really a problem with the difference in volume, aside from the fact that you have to be careful when switching to the DVD. It would be nice if the Yamaha could compensate for the differences, but you may have to live with it!

I guess, You are right - I will have to live with the lack of gain compensation. Actually, the only problem is - as you say - when you switch to DVD from Tuner - the change in volume level is not for the faint of heart !!! Sometimes a guest accidently changes the inputs - and then he's in for a rude shock!!

But tell me, do the changes in signal strength affect the sound output of these satellite recievers? I mean if I get a 4 bar signal strength or a 2 bar - will it affect the final sound output and the Clarity of the output?

[jeskibuff]

I am amazed at your ability to drill out relevant URLs from obscurity.

Well, as seen earlier in this thread, I missed that Rroar II link even when it was staring me in the face!

do the changes in signal strength affect the sound output of these satellite recievers? I mean if I get a 4 bar signal strength or a 2 bar - will it affect the final sound output and the Clarity of the output?

No. Your volume control is very able to compensate for the lower signal strength coming out of the satellite receiver. With input gain compensation, you're actually boosting the signal level twice...once as the signal initially enters the preamp's input section, then again with the setting of the main volume control. The only bad thing about a low signal level coming in is the possibility of a higher noise floor. It's nice having a good strong signal coming in, because when you amplify a weak signal, you're actually boosting any noise on that line as well. What I'm saying is that you'd probably get the same output quality whether or not you have gain compensation on the Yamaha.

[msrance]

Your volume control is very able to compensate for the lower signal strength coming out of the satellite receiver. With input gain compensation, you're actually boosting the signal level twice...once as the signal initially enters the preamp's input section, then again with the setting of the main volume control. The only bad thing about a low signal level coming in is the possibility of a higher noise floor. It's nice having a good strong signal coming in, because when you amplify a weak signal, you're actually boosting any noise on that line as well.

Thanks for that one Jeski !! I seem to know so much more about Audio than I knew a month back.

[msrance]

Hello again Jeski! I know I am such a bother - but now there's this new problem that I just noticed - with the DIY 8 ohm speakers I was so happy about.
The speakers make an aweful resonating sound when pushed hard - just the LF drivers - that is. I was today playing this pop album (The only pop album I ever bought - but then TATU are barely pop - they are so overtly Popular Rock that I decided to go for them). Anyways - so when pushed close to max the speakers made this godaweful sound - that I can only describe as a flutter - and when I took off the panel to check out the driver state - they were actually fluttering ( like we say in medicine - there are normal heart contractions and then there are flutters - that is when the heart is contracting so fast that is doing nothing useful with the contraction - just harming itself) - so these HF drivers - all 4 of them at 8" were doing nothing worthwhile - but fluttering at an enormous rate and resonating witht he cabinet - and it felt like the whole assembly is gonna fall to pieces any moment now - but when pulled back to a decent volume they became alright - next time I did an experiment with it again - and this time - they started giving way earlier than the previous attempt.
Whats with this buddy? and how do I handle this? apart from the evident way of not pushing the volume too hard.

[jeskibuff]

do the changes in signal strength affect the sound output of these satellite recievers? I mean if I get a 4 bar signal strength or a 2 bar - will it affect the final sound output and the Clarity of the output?

Oops...I think I mis-read this question when I first replied to you. Yes, incoming signal strength (off the satellite) probably WILL affect the sound quality. I don't know much about satellite reception, but if it's digital, you may get dropouts on a weak signal and if it's analog, you should get noise and/or distortion. Sorry that my earlier response may have been off-base!

when pushed close to max the speakers made this godaweful sound - that I can only describe as a flutter

This sounds to me like the drivers can't handle the volume, especially with low frequencies. The Yamaha's telling them what to do, but they don't have the ability to respond properly. Being DIY speakers, this could be just inadequate design. If you could "roll-off" the bass level to just these speakers, that would probably help, but I imagine the Yamaha doesn't have that flexibility. A possible solution would be to put a capacitor in series with those speakers. That would pass only the higher frequencies and block the low ones. You'd still get the low frequencies from your "A" speakers and sub.

Anyway...that's just my "guess". Perhaps some others will have some other ideas about what's wrong.