PC for Brsyton 4B SST

You need to unplug the NAD and physically disconnect it from the Bryston to check for the buzz. I say this because I've done this test myself, and discovered that often the buzz will exist even when a connected component is turned off. When the component was disconnected the buzzing stopped or was diminished.

If you have continued buzzing with only the Bryston connected, then again, I suggest you contact Bryston. While there may be nothing wrong with the amp, they may have an idea about a solution.

You didn't mention if you've tried going straight to the wall with the Bryston's power cord.

Grounding issues are a hassle. I've tried every method suggested here on Audiogon (do a thread search), and none of them have worked in my case. Usually, I've fixed the ground loop hum by trial and error of connecting and disconnecting interconnects, trying shielded interconnects, etc.

But, I'll admit I've never had a ground loop hum when just my amp was connected to my speakers with nothing else plugged in or connected to the amp.

Good luck!

Tvad,

Thanks for the time you've taken in trying to help me.

With the reciever completely disconnected there was no buzzing but hissing. I've tried connecting the amp straight to the wall and into my powerbar to little effect.

Believe I've tried myself and thought to give it anoher try. I wish there was a device that would pinpoint the problem instead of all this trial and error.

I have searched and found ground loop isolators ranging from $9.00 to over $100.00 but I'm leary.

Many Thanks

OK, no buzz, but hiss with only the Bryston connected is normal. Did the hiss go away when the amp is connected to the Monster? If not, it would seem the Monster doesn't provide much conditioning, but perhaps some surge protection, which might be important to you. Otherwise, what's the point of the Monster other than a glorified outlet strip?

The buzz comes in when you add the receiver. Connect the receiver but leave it unplugged. Any buzz? How about when you plug the receiver in, but don't turn it on? Now, turn it on. Do you see the methodology here? I'm assuming during this you have no source connected or plugged in. If you do, then you can't isolate the problem to the receiver. Take it one step and one component at a time.

Are you connecting the receiver via balanced cables? If so, try single ended cables or vice versa.

I was doing this exercise once. I had no buzz with just the amp. I got a buzz with the preamp connected and plugged in, but without a source connected. Once I connected the source and plugged it in, the buzz went away! Who know why? I don't.

If the buzz occurs when the receiver is connected with a source, I'd try borrowing a preamp and see if the buzz goes away.

The hiss was still present with the amp connected to the powerbar. The buzz is Present when the amp is turned on. Connections are via RCA.

Here is what I've come up with so far.
Reciever on ,amp on but no RCA cables=no buzz
Reciever on,amp on connected=buzz
Reciever connected to amp but unplugged=buzz
Reciever on,amp off=no buzz
Reciever off,amp on= buzz
Both on=buzz
Source components connected/disconnected=buzz

At this point I thought it might be my rca cables but when I connected my speakers to my reciever like I used to have it the buzz was still there.

This is getting so confusing it's driving me to drink,smoke, and the night is still young.

I'd have to say it's your receiver. Borrow a preamp (or buy a good used one you can re-sell) and see if the buzz goes away. You can do a thread search for excellent inexpensive preamps. This question has been asked many times.

Also, you can decide whether the Monster is worth having. There are a number of good power strips available. Surge protection is another matter...OneAC, Powervar, Brickwall...all make good surge protector/conditioners that are high quality but inexpensive. Or, you can keep the Monster. :)