That next step could easily be a deep one, LOL
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indeed, i have this one Elektrosluch 3+ – LOM and it’s super handy tool
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Have:
- Added pairs of nonmagnetic stainless steel bars to the '600s and the top of the loboy, all to reduce resonances;
- Installed IsoAcoustic Orea Bordeauxes (sp?) feet under the '600s; and
- Installed pairs of Mazda/Mullard PCC189s.
Will soon be simplifying equipment and furniture in this backend… The loboy, CC speaker, and Pass amps will be removed, with only the '600s and the Emotiva amp then spread across a narrower 1.2"-thick marble slab… This will allow more space around all this equipment, which will be safer for this chubby 80YO.
FWIW, here’s a current pic.
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I did, too…
Just got a brand new pair of these:
Their sound and sound staging is indeed addictive. Unfortunately, the transformers are humming much louder than the BHK 300s they replaced. I can now hear the transformers from my listening position, even when music is playing in the more quiet passages. To be clear, I‘m talking about the hum from the amps when no speakers are connected.
I‘ll try a DC blocker next, just to be sure. No way they are going back.
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Glad you like the 600’s. I cannot detect transformer hum with these unless I am right up on them (and it is faint) and not certainly not anywhere in the room.
You might check with PSA, and how their placement and platform may be adding resonances.
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Are the BHKs fed by the P12? Have you tried them plugged straight to the wall?
Looks like you are, like me, in the 230V part of the world, I had the same issues with P15/P20 regens. Tried ifi DC Blokers and Toroyd DC Blockers, without success. I had to replace them with a Puritan PSM-156, that was dead silent.
I know they are not a light weight but have you tried them plugged into a different place of the room far from subs/loudspeakers? Just to focus on the cause of the buzz, electrical mains (DC offset) or electromagnetic interferences around them.
Big toroidal transformers might be critical sometimes… good luck, hope you can soon find a solution.
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The P12 is a P5, and I plugged them in to see whether it would make a difference (kudos, the P5 didn’t shutdown). Even tried lowering the voltage to 220V. Originally had them connected directly to the wall. Now pulled out the isotek evo3 synchro I had from earlier experiments, which should be a decent DC blocker. None of it successful so far. Would the Puritan do something different?
The tip with isolating the components and trying one after the other could be a good direction. I seem to remember that things were fine as long as only one of them was turned on.
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Can’t say, my issue was the P15 itself so I replaced it with a Puritan. Never had other components with a toroidal transformer buzzing that a Puritan solved.
I know it’s really frustrating when you love the sound it brings but you challenge to fix that annoying hum that can drive you crazy and distract you from the music. I usually prefer the amp(s) plugged straight into the wall, it’s pretty odd that your previous amplifiers didn’t have the buzz… I can suggest you to contact PS Audio customer service, they are responsive and great guys to deal with in order to investigate deeper your issue.
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Did not mean to mislead you with that link to the available Puritan, @jens42 – I misunderstood Luca’s previous post.
Hope you resolve your hum issue soon.
By the way, it might be worth your while to play around with all of your connections. Make sure everything is nice and tight and power cables are not running too closely along side of signal cables. I seem to recall eliminating a hum with a little housecleaning once upon a time.
Of course, if the amp hums when it is powered up with NOTHING else connected to it, then good cable dressing will be of no help.
Regards.
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@jeffreybehr Is that a Vandersteen center channel speaker in the first image?
Recommended.
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Before the PowerZone era…
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Truth
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You didn’t mislead me, no harm done. I fully understood you mentioned it because of its DC blocking capability.
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