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#2104603 - 06/18/13 07:30 PM Any other opinions on Isolation Xformer/Power Conditioner
rnaple Offline

Silver Supporter until April 24 2014


Registered: 12/23/10
Posts: 2055
Loc: Rocky Mountains
I need some kind of power supply isolation or conditioning. I can get some odd things happening. I know it has to be coming through the power line. I can hear it in my monitors. Sometimes my new Mac is slow. Appearing to be fighting something...am sure it's the power supply.

I'm looking at a good power conditioner from TrippLite. Good name brand. 1.2KW.
But then there is an absolute Isolation Transformer from TrippLite. Only 250W. Cost the same as the power conditioner above. Would need two of these boys.
Both are priced the same for each unit.

I'm thinking the power conditioner is good enough. Perhaps better? Any opinions from you engineering boys?
_________________________
Ron
Your brain is a sponge. Keep it wet. Mary Gae George
The focus of your personal practice is discipline. Not numbers. Scott Sonnon

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#2104613 - 06/18/13 07:53 PM Re: Any other opinions on Isolation Xformer/Power Conditioner [Re: rnaple]
Allan W. Offline
Full Member

Registered: 10/03/12
Posts: 371
Loc: Michigan
I don't think putting your computer onto a power conditioner is helpful. If you need a power conditioner at all, that would be a waste of capacity. Power issues would not be able to mess up your computer (without crashing your whole system) other than its analog audio interface.

That said, I understand why you might want one. My speakers make a loud popping noise every time someone switches the bathroom fan on or off. This is because switching on and off a large load like a fan causes large voltage spikes which isn't filtered out by my amplifier.

Here are the things I would do in order:

1) Use external USB audio interface. This can be separately powered. Use an audio hum isolator going from your audio interface to your speaker amplifier.
2) Put your speakers on a power conditioner. I've been thinking of doing this in order to fix the popping I mention. The power draw of my speaker amplifiers is less than 20W, although I'm not sure a tiny power conditioner would be able to handle any large transients.

#1 only needs less than 5W so you can probably get a cheap power conditioner. #2 might only need 50W at most.

You definitely want to use an external audio interface anyway, because the onboard motherboard ones are not very good. They have lots of digital noise coupled onto them (you might hear high-pitched squealing if you do some CPU-intensive tasks). For example, if I plug my headphones into my motherboard audio output and have no audio playing, I can hear squealing everytime I scroll in my web browser.


Edited by Allan W. (06/18/13 08:05 PM)
_________________________
Recent adult re-starter... http://www.youtube.com/user/allanw
Kawai MP-10 + Ivory II (pic), Young Chang Y175, 2012 (renting) (pic)

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#2104618 - 06/18/13 08:07 PM Re: Any other opinions on Isolation Xformer/Power Conditioner [Re: rnaple]
rnaple Offline

Silver Supporter until April 24 2014


Registered: 12/23/10
Posts: 2055
Loc: Rocky Mountains
I have to admit. The slowness might just be the internet. I'm just covering all bases. Big one is my monitors. I could hear them changing and noise getting through. Bear in mind. I have a computer speaker setup that would play some radio station with no audio connected. It's through the power line.

My monitors are 280w class A amp each.

I get a power conditioner or isolation transformer. I might as well get it for everything. Computer, keyboard, monitors.

Here is the power conditioner. Appears pretty good.
TrippLite 1.2KW
_________________________
Ron
Your brain is a sponge. Keep it wet. Mary Gae George
The focus of your personal practice is discipline. Not numbers. Scott Sonnon

Top
#2104625 - 06/18/13 08:19 PM Re: Any other opinions on Isolation Xformer/Power Conditioner [Re: rnaple]
Allan W. Offline
Full Member

Registered: 10/03/12
Posts: 371
Loc: Michigan
Let me know if it helps. I've seen some power line filters specifically marketed for audio applications on Amazon. I don't know if they're actually radically different from industrial power line filters like the ones you've linked, or if they're just marketed for audiophiles so they could have the price jacked up.

They have a whole line-up of products: http://www.amazon.com/gp/product/B000SXWGDI/

I haven't evaluated any myself to know if they will actually improve anything in terms of audio. I'm just 100% certain that 1) you'll want an external USB audio interface anyway and 2) your computer would completely crash if its power supply was faulty at all (if ANY single bit gets inadvertently flipped then there's a chance your computer will crash. The data interfaces within a computer run at hundreds of gigabits a second, so any real power issue will crash your computer).

If you put your computer on the filtered outputs of your power line conditioner, its power supply will add its own noise to the power line. You'll filter out some external power line noise though, which might be enough.

That's why I would suggest only conditioning your audio setup.
_________________________
Recent adult re-starter... http://www.youtube.com/user/allanw
Kawai MP-10 + Ivory II (pic), Young Chang Y175, 2012 (renting) (pic)

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#2104631 - 06/18/13 08:53 PM Re: Any other opinions on Isolation Xformer/Power Conditioner [Re: rnaple]
rnaple Offline

Silver Supporter until April 24 2014


Registered: 12/23/10
Posts: 2055
Loc: Rocky Mountains
1) The audio card in my Mac does better than the Pre Sonus USB interface I have. I don't get any noise created, etc. It's a good audio signal. I'd have to get a real good USB interface to have better. Spend some bucks. I"m working with a Mac, not a PC.


2) I apologize to inferring that my computer's power supply might have a problem When I said power supply. I meant the AC line plug in the wall. I live in an apartment building. People have all kinds of whacky, half working, goofy things plugged in. Can cause supply problems. Pulling neutral off, etc. Bad old outlet connections. Goofy things. I need to get isolated from all that.
I could imagine my computer's power supply having to sort out something going on temporarily with the AC line input. Holding up what's going on in the computer at times temporarily. I'm not sure this happens. Could?
I've got a protective outlet plugged into the wall. Plug the computer and other stuff into it. The light that indicates a ground fault on the outlet is on. This without anything plugged into the protective outlet. It might have gone bad?
Either way....would like to isolate, or protect my stuff.
I'm gonna get that conditioner. It appears to be pretty good.

Interesting thought on the computer's power supply adding noise to the power line. Something to consider. ????

EDIT: Looked at that one you linked. Doesn't say what wattage it will handle? Looks fancy. Digital Volt Meter? Lan/Phone protection and USB charging port? Fancy Fancy. Built to catch buyers?


Edited by rnaple (06/18/13 09:04 PM)
_________________________
Ron
Your brain is a sponge. Keep it wet. Mary Gae George
The focus of your personal practice is discipline. Not numbers. Scott Sonnon

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#2107963 - 06/25/13 04:55 PM Re: Any other opinions on Isolation Xformer/Power Conditioner [Re: rnaple]
rnaple Offline

Silver Supporter until April 24 2014


Registered: 12/23/10
Posts: 2055
Loc: Rocky Mountains
I definitely had a ground fault in that outlet. Checking with a volt meter. Only had .76V to ground from neutral. Didn't appear to be any big deal. But then, that ground is the ground socket in the outlet. Not sure how good it is? I don't have long leads on the volt meter. Can't go running to other grounds.
The power conditioner verified a ground fault there. Also a protective outlet I have did the same. Both show no fault in other outlets.
So I'm better off with the power conditioner anyways. We get some weird stuff going on with electricity here.
_________________________
Ron
Your brain is a sponge. Keep it wet. Mary Gae George
The focus of your personal practice is discipline. Not numbers. Scott Sonnon

Top
#2109815 - 06/28/13 05:09 PM Re: Any other opinions on Isolation Xformer/Power Conditioner [Re: rnaple]
rnaple Offline

Silver Supporter until April 24 2014


Registered: 12/23/10
Posts: 2055
Loc: Rocky Mountains
After three days. I gotta say this is working. Everything running smooth as silk. I'm glad I bought this. I would suggest it. Got plenty of capacity. It's foot print is less than a miniMac and it's about 5 times as tall. I'm very happy with it.
It's a very good price too.
Bear in mind. That company. If you get anything from them. I was surprised receiving this. Their website still had it as not shipped yet. Doh!
_________________________
Ron
Your brain is a sponge. Keep it wet. Mary Gae George
The focus of your personal practice is discipline. Not numbers. Scott Sonnon

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