Would a power conditioner tame the intermittent buzz in my house?

I had the same problem, and it drove me nuts in my studio.

Assuming you have a well grounded system, which not everyone does, it's true that not only is the AC in some areas bad at times, but things like appliances cycling on and off, such as refrigerators, furnaces, hot water heaters, etc., not only send noise into your house's line, they can even send noise into other houses' lines.

You could try a dedicated AC line, this is the cheapest solution, but it won't solve the problem of dirty AC from the electric company, or your neighbor's fridge. It is, however, the first line of defense.

The typical power conditioners will not only NOT solve this problem properly, they will also not allow your amp to get AC juice as fast as it wants to. I've tried the expensive Tripp Lite and Furman models, and even tried the $1200 audiophile conditioners.

After tearing my hear out for a few years, I had my technician install a 2 kilovolt isolation transformer. It really solved the AC line noise problem.

However, it caused a slight problem, because it makes a very loud mechanical buzzing noise. So I had to soundproof my furnace room, which worked, and did, in fact, make my whole studio quieter when the HVAC system runs.

My tech picked up my SOLA unit used for about $800, and installation was another $300. Soundproofing ran $750, because we had to put up another layer of drywall and insulation, etc, in the furnace room. Kinda pricey, but worth it.

I have been around the block on this one, and there is, unfortunately, only one real solution if you want to permanently solve the problem.

 

Whilst I agree with what Les is saying about dedicated lines, earthing etc, and these are all good things to do to ensure a clean supply - depending on the specific problem you are experiencing, you may get a result from filters.

 

What do you mean by "as fast as it wants to" ?

 

In case you haven't already covered this; if you have light dimmers on, no amout of power conditioning will help.

 

So, the Furmans will not work? I have a similar problem and was considering a Furman unit.

 

57special
Great discovery. Sorry if my post seemed patronising - I was trying to keep it short. Good luck with the solution.

 

The typical power conditioners will not only NOT solve this problem properly, they will also not allow your amp to get AC juice as fast as it wants to. - I think this only comes into play when you are using a "switching" amp. I don't think guitar amps are of that technology.

You might also try what is called a "balanced" power supply. Furman makes a unit called an IT-1220.

 

>>The typical power conditioners will not only NOT solve this problem properly, they will also not allow your amp to get AC juice as fast as it wants to. - I think this only comes into play when you are using a "switching" amp. I don't think guitar amps are of that technology.<<

I guess I didn't clearly state what I meant. I found that a Tripp Lite and several audiophile conditioners seemed to limit the dynamic range of my tube guitar amps, and they did the same thing to my Class A Krell power amp, that was not a switching amp (such as a carver).

I mentioned this to my studio tech, and he told me that they were preventing the amp from drawing sufficient current at peak demand times. Or something like that. Anyway, they sounded bad.

I installed a 2KVA isolation transformer to solve the noise problems I was getting from the AC line, and to solve the little glitches computers and digital instruments sometimes get from noisy power lines.

>>You might also try what is called a "balanced" power supply. Furman makes a unit called an IT-1220.<<

I had one in my studio to convert the output of the big Sola iso transformer to balanced power. The thing is designed to reduce the noise floor in a studio by about 12 db. I measured about an 8 db noise floor reduction in my studio.

Just one thing to note: It requires a 20 amp line, instead of the usual 15 amp house line, and the special 20 amp wall plug. So if you're moving from room to room, or playing out and want to take it (the thing weighs 75 pounds BTW), most places haven't got the right plugs in the wall. It runs around $1200.

A balanced power supply works in a studio setting quite well, because it reduces radiated hum and noise from all the power cables, reduces ground loops, etc. I didn't plug my guitar amps into it, but I did plug my studio monitors (powered Genelec 1031As) into it, and they were quiet and didn't seem starved for peak power with it.

The problem with my IT-1220 was that after a while the fairly large transformer in it began to make a mechanical hum that drove me nuts. So my studio tech converted my big isolation transformer that lives in my HVAC room, which is soundproofed, to balanced power, and now all my wall outlets in my studio are balanced power. I sold the 1220 this past summer to a guy who said he didn't care about the mechanical hum, it was going in a machine room, but I'd recommend this type of unit to anyone with a studio.

 

Could your intermittent buzz be related to alchohol consumption, or is it a different kind of buzz?