Youduoliang

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Apr 30, 2020
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2KW Isolation transformer limits power amps' performance. Isolation Transformer's rated VA should be at least 2 times bigger than Power Amp's transformer. 3 times bigger is ideal.
 
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Mikem53

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Oct 1, 2020
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Measure the voltage output of each at that location.

Also how consistent was Ron’s placement along with things in the room?
That’s the Key .. I owned the Equitech ET2Q for over 20 years.. The secondary winding has a higher output. The unit if fed 120v, will output 124-126 V, half that on each leg. They do this to keep the voltage from sagging under load. So if you lightly load it, you will get a higher voltage, even a medium load will still yield more voltage than the incoming line..
When I removed my BAT mono amps from the system, the unit kept delivering 125+ volts, which was too high for my low powered tube gear.
 
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Uk Paul

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That’s the Key .. I owned the Equitech ET2Q for over 20 years.. The secondary winding has a higher output. The unit if fed 120v, will output 124-126 V, half that on each leg. They do this to keep the voltage from sagging under load. So if you lightly load it, you will get a higher voltage, even a medium load will still yield more voltage than the incoming line..
When I removed my BAT mono amps from the system, the unit kept delivering 125+ volts, which was too high for my low powered tube gear.

It seems that most companies are spec'ing transformer outputs to match the input at full load which in use they will never achieve. We spec ours to equal the input at 40% load which is far more realistic for an audio system, thus protecting connected equipment from overvoltage as you describe.
 
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Onepoint5

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Sep 24, 2011
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Sorry I'm late to this thread, started to explore the site again once a few vocal ratbags have left. I have an Equi=tech 1KVA unit and also a Topaz iso trans 2kVA. The Topaz with it's larger capacity has the energy to provide 'enough' power than the Equi=tech which ran out of puff at loud passages.

Have thought about connecting the Equi=tech to the source components only, and the Topaz to the pre and power amp. I started to shut down the system power and realised that separating the source components would need another GFCI (ELCB) which I didn't have to hand. Another important issue is that it could have created a differing potential in the system ground and noise could return to the wrong transformer and negate the use of the balanced system in the first place. There would need to be major change to the wiring both at the source and at the wall, so need to plan this out a little better. An off track byline.

I don't doubt that the OP measured the 3db gain and the effect was real. This is very noticeable on a Equi=tech or a balanced power supply. The amount of energy is usually in the bass. The 5th harmonic is an anti-motoring harmonic, that means for a rotating machine, the 5th acts as negative torque to what the motor produces. For a speaker, the 5th acts like a brake on the coil's movement. Remove the 5th and it's all good.
My guess is that the harmonics are not symmetrical or are cancelled out by the balanced power supply.

For the P10/P20 sounding warmer, this could be attributable to filtering or removing odd harmonics from the output, leaving even harmonics as created by tubes. The P10/P20 are inverters which inherently are common mode noise generators, with the right filtering can be removed, easiest way is with an isolation transformer. or Inductors & caps which can also clean up the square wave output of an inverter to a sine wave. This doesn't make a perfect 0% distortion sine wave, since the rest of the distortion is caused by harmonics (from the squarewave) or switching artefacts from the output stages.
 

Kingrex

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Feb 4, 2019
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The sound is louder because the voltage on the output of the transformer is higher than the output from the P10.
 
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Mikem53

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Oct 1, 2020
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The sound is louder because the voltage on the output of the transformer is higher than the output from the P10.
I had This issue with my ET2Q which added 4-5 volts to compensate for load.. The equi-tech was already getting 124 volts from the mains In the winter months as nobody was loading the power down with HVAC units. I put a 20amp VARIAC in front of the Equitech to lower voltages for my tube amps, pre, etc..
I had to get another Balanced power transformer for my system that did not Increase the voltage too much as I don’t put much of a load on it with my current system.. Worth the effort and expense, IME.
 

Kingrex

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Feb 4, 2019
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My triplite is about 3 volts higher than the main. My Topaz about the same.
 

RikkiPoo

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Nov 5, 2020
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I have a P10. I have my digital gear on it. I had to move it onto its own dedicated line. I had it on a dedicated line with a Shunyata Denali. I found it was negatively impacting the Denali and my analog gear (the Denali was feeding the P10 and it was still affecting the line when I moved it to the same wall plug as the Denali ).
I also found the adjustments for sine wave and pulse wave need to be set carefully for best (or worst) effect of the P10. It can sound bad.
I also found having SMPS's on the P10 was not a good thing, it soaked up the grunge and passed it along to components.
I found adding a PS Noise Harvester to one of the dual plugs on each zone very beneficial, those little suckers pull their weight and way more for the cost.
 
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Alrainbow

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Dec 12, 2013
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I have a P10. I have my digital gear on it. I had to move it onto its own dedicated line. I had it on a dedicated line with a Shunyata Denali. I found it was negatively impacting the Denali and my analog gear (the Denali was feeding the P10 and it was still affecting the line when I moved it to the same wall plug as the Denali ).
I also found the adjustments for sine wave and pulse wave need to be set carefully for best (or worst) effect of the P10. It can sound bad.
I also found having SMPS's on the P10 was not a good thing, it soaked up the grunge and passed it along to components.
I found adding a PS Noise Harvester to one of the dual plugs on each zone very beneficial, those little suckers pull their weight and way more for the cost.
You do pay attention well. The dinali is a very good passive filter does little of any harm . But I would not use it to feed a power conditioner as you found out.
The Regen works very well but I would use it on large power amps. I'll bet it's good on set amps .
Have you tried his multi wave ? if you have or can by a 2k bal iso tranny to feed the p10 it improves even more .
Also to me if a line conditioner can't make it your tv and cable box better , I doubt it's doing anything for our audio .
I told Paul this on his forums . I don't think he wanted it put together don't know why.
 

Phillyb

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May 31, 2012
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Like always each unit adds something to the reproduction. Base testing everything has to be everything plugged into the wall as a starting point you will then hear the sound el-natural as the designers of the gear intended. In fact, once using the system for days like that it does sound quite good.

I live with it and use key songs and make notes of what really stands out nicely, say a standup bass, piano, and vocals. I then hook up my conditioner and listen after the system is back on for a few hours, only then will the changes be self-evident for better or worse.

In my experience, the PS Audio Regenerators take all and just makes it even better, from top to bottom across the board, unlike others I've used that may increase the bass, bring out the highs more, push vocals more forward, the regenerator does not spotlight any one thing. The noise floor is nonexistent.

I have owned the top 5 conditioners over the years and the PS stayed. Having said that, I just heard an Equi-Core 1800Mkiii from a friend's system, and it had the same positive impact as the PS Audio in many ways at a much cheaper price and sounds more dynamic in some ways. Overall the P15 might be better, but for the money grab the 1800Mkiii. It does a whole lot, for a lot less, and is an improvement over the wall across the board.
 
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Alrainbow

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Dec 12, 2013
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A very simple test that shows or does not show results .plug an hd tv and cable box into it. If you don't see an obvious uptick in clarity around eyes as an example . I wonder how can it be improving our audio.
Lastly has anyone proved a power cord using this method lol.
I'll sit back and wait with the crickets for replies
 

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