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Throughly disappointed with my new Yamaha A-3000 Integrated.......

well, I love it when it's not shutting down.  Finally called the dealer and told them I'm done with it.  From the first day, it shut off and went into protection mode after 10 minutes of listening.  It's doing it all the time now.  I did figure out how to reset the amp, but it continues to go into protection mode.  Here's what I've done to track the issue down.  Am I missing anything?  By the way, I'm a user, not someone who can track down voltages, test wires etc etc.

1. Pulled power cord for 30 minutes- I use a PS audio PC
2. Unplugged all connections- amp stayed in protection mode with nothing plugged in.
3. I then figured out how to reset the amp.  The amp then worked for for some periods before shutting off.  Yesterday for example, playing vinyl, amp shut off after 5 minutes.  I then did the reset and listened for 2 hours without shutting down. 
4. Today, after 5 minutes it shut down again.
5. Doesn't matter if it's vinyl or CD playing.
6. I just unplugged my Sub now as the rca cables are a bit bent up; however it didn't affect play for 2 hours yesterday without shutting off.

Disappointed as I was looking forward to breaking this in over Christmas break........  
128x128dhpeck
helomech
1,727 posts
 
Dave,

Unless you're using very demanding speakers, I wouldn't be surprised if your amp's bias has drifted, possibly due to shipping. The first A-S1100 I had in my possession ran very hot, my current one barely gets warm after a couple hours. My room remains around 65°F this time of year.

When I asked the local Yamaha tech about the difference, he said all Yamahas should run warm, not hot. However, I can't say whether he has experience with the 3000, that may be a different beast. 
corks67's avatar
corks67
15 posts
 
@helomech thank you for your response, my speakers are dynaudio confidence 5, listen so far has been done with volume at 9 to 10 o'clock. .

with music it got  dry hot, yesterday I just turned it on . No music same result very hot . 
helomech
1,727 posts
 



Dave,

That’s what occurred with the first example (A-S1100) I had in my system, however, it sounded and functioned just fine. I only returned it to try another amp. Ultimately, the Yamaha sound beckoned and I bought another. This one runs warm above the capacitor bank, but only after a good hour or more.

Maybe the 3000 is biased into class A some, even though it’s not advertised as such. That wouldn’t surprise me either and might account for the heat.
arch2
308 posts
 
Dave,
The top plate of my AS300 will be warm but never really beyond that. All the speakers I have used with it have been fairly easy loads in the 6 to 8 ohm range and 88 to 91 db efficient.
Don
corks67's avatar
corks67
15 posts
 
@helomech @arch2 

thanks guys, my dynaudio are I think 86db and I think a 4 ohm. But heat seems about the same , if the amp got warm under load unstanderable, but twice now I’ve let it sit and not play any music. And still gets very hot. 

Regards dave
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