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Bryston 7B ST - Sounds anaemic. Any help?

I bought a new Bryston 7B ST recently to replace a 94 model 4B THX to drive my bass and I was hugely dissapointed. I wonder if there is a possibility that it may not be pumping 500w as it supposed to do. I have Alon Circe speakers.

I just don't get the oomph factor and I feel the 4B THX kicks better.

Would appreciate suggestions
hafeez
nanning
10 posts
 
Since there are quite some 7B users on this topic, I have a question about these amps that I'd like other 7B users to answer. When I turn off the amps (7B ST) I hear terrible squeeky sounds through the loudspeaker which then slowly fade away... First I was afraid that my speakers where being slaughtered but now I know that they don't and keep working normally. Do all Bryston amps have this strange behaviour or could there be something wrong with my Brystons?

I'd really appreciate 7B owners experience with there amps in this regard.

Thanks you!
pbb
1,140 posts
 
All power amps that I have owned did something similar. Ask Sean, but I believe it's the storage caps that are discharging.
jameswei
883 posts
 
Dear Nanning,
I have observed the same noises with my 7Bs. I agree with PBB that it is probably from capacitors discharging. It is disturbing but not damaging. There are ways to prevent these sounds, but obviously this was not done for our 7Bs. I am happy not to pay for extra circuitry. I left my 7Bs on virtually all the time anyhow.
nanning
10 posts
 
Ok, thank you for putting my audiophiles' mind to rest. I guess at Bryston less is litterally more (sounds...)

;-)
loontoon
301 posts
 
You can wire a resistor from the caps to gound to discharge the caps more quickly if you like. It is my less than humble opinion that you end up with two choices:

1) Discharge the caps, which produces heat the whole time the amp is on.
2) Add a relay which can (if done correctly with gold contacts doesn't) degrade the sound.

Last I don't believe that any transient signal has any place near my less than robust tweeters. In my opinion this is a design oversight, and is unacceptable.
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