Goss.. Toss...joss...hoss..?
Hmm.
Isn't spellcheck wonderful.
Jn
I must confess to little experience with such small systems. Our requirements are significantly more rigorous.
Jn
Well Ed, you are specifying the largest power supply system that I have ever encountered for audio reproduction.
I remember back 45 years ago, when John Meyer and I were asked how much stage power that might be necessary for the facility being made for The Montreux Jazz Festival. We said 50KW and they thought that we were nuts! '-)
It is tough to completely clean up a power amp power supply. Fixed regulation is inefficient, toroids are leaky, etc. Conditioners may help, but often they limit performance of the amps as well.
Parasound is coming out with a compromise using a big toroid per channel 2200VA for the output stages, and an R core for the driver and input circuits, with double regulation. I hope it makes a difference.
I remember back 45 years ago, when John Meyer and I were asked how much stage power that might be necessary for the facility being made for The Montreux Jazz Festival. We said 50KW and they thought that we were nuts! '-)
It is tough to completely clean up a power amp power supply. Fixed regulation is inefficient, toroids are leaky, etc. Conditioners may help, but often they limit performance of the amps as well.
Parasound is coming out with a compromise using a big toroid per channel 2200VA for the output stages, and an R core for the driver and input circuits, with double regulation. I hope it makes a difference.
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Hi John,
It is true power amp AC is more expensive to condition. We have set up brute force Tempest Black LP filters that are 100 dB down at 14 KHz and 15 KVA ultra isolation transformers which in series have less than 2% voltage drop at the 10 KVA power level. These were used in a serious recording studio setup in a urban area, but collectively cost $6k. The owner stated they improved the noise floor, so the dynamic range was expanded at the low end of the scale...
Cheers,
Howie
Is that what he said? Something that is easy to measure. It's a well known fact some people prefer a little RFI, can make the sound appear faster etc etc....
Yes, people like what they like, difficult to guess. As NP said here, "Anecdotally, it appears that preferences break out roughly into a third of customers liking 2nd harmonic types, a third liking 3rd harmonic, and the remainder liking neither or both. Customers have also been known to change their mind over a period of time."
If you want belt and braces, you can have 2 shieldings, on connected to chassie one to ground. I think I saw the idea in a book by Ott.
/örjan
Went back and re-read it......in a nutshell giving the amp a clean run of power from the circuit box (upgraded wiring/receptacles/cords) with the only conditioning being a parallel shuntaya defender plug in.
Also stated upgrading the amp fuse was critical.
He did mention with every improvement was getting higher ascc numbers....but no numbers were given.
Any way you look at it, seems less is more in this case.....I already have a dedicated 12/2 20a circuit from the box with hospital grade outlets so seems as though choking the available current with the Furman is possibly my problem.
Only thing is i’m in the middle of finishing my interior and won’t be able to test the theory for a couple three weeks.
Btw.....how does a parallel surge protector like the shuntaya defender work?
Does it short circuit and trip the breaker?
Edit.....after checking eBay I see the monster 7000 available for under $500....is this something that stays stable with age/use or would a used one be a can of worms?
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Is is a MK II or the original version? MK II is the one to get.
Also, shipping cost can be substantial due to the weight.
It’s a original version. My power seems fairly clean we just live in area prone to t-storms and regular blinks/surges.....that is my main concern. If the Furman is the culprit what’s the cheapest least invasive way to address that concern?
Oh dear, I was hoping the word "choke" wasn't the issue
True......thanks bill.
If I go that route I should probably wait for a mkII to show up like mark says.
Is the monster 7000 as good at surge protection or is it just fused?
Thanks Richard for posting the info. I used to have a Belkin Pure AV filter/conditioner with delayed starts and supervisory display of volts and current like this....
The filtering looks to be not dissimilar to what you implemented and it worked as advertised in terms of reducing mains noise BUT I couldn't get past the ferrite sound it injected into the system so out it went.
I now know how to eliminate or at least minimise ferrite sound so perhaps I rejected it too soon, someday I will experiment with different core materials including different ferrite formulations and powdered iron cores. What core materials did you use and where and why ?.
Dan.
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