The mechanical hum from the power transformers has nothing to do with hum from speakers.
ying and yang--Lamm ML3 and darTZeel 458
- Thread starter Mike Lavigne
- Start date
The mechanical hum from the power transformers has nothing to do with hum from speakers.
Hi adyc,
I am making switch from ss to SET. Very curious what SET you were using that led you back to ss again? If so what was the driving factor behind this decision?
Cheers
I am making switch from ss to SET. Very curious what SET you were using that led you back to ss again? If so what was the driving factor behind this decision?
Cheers
If it hums still with all sources disconnected then there is either a transformer mechanically humming or there is something wrong with grounding or wiht the internal circuitry. I have rarely found an electrical hum or buzz continue when the amp is not hooked up to anything other than the speakers. Mechanical hum happens regardless...if it happens at all...
resistance is feudal. I see myself running two parallel preamp/amp combo's down the road....Slamma Lamma pre and amps and of course my Pass SS XS pre and amps...
That seems to be the best way to go if you are to maintain two different pre/amp topologies.
Mechanical hum is related to the quality of the transformers, mains quality and sometimes to mechanical resonances in the mounting of the transformer or amplifier box.
US electronics coming to Europe suffer a lot more from than those working in 60 countries - at 50 Hz transformer flux and and losses are higher, resulting in higher temperatures and dilation of transformers. Most US manufacturers do not test their electronics at 50 Hz, they do it at 230V 60Hz.
BTW, the Lamm ML1.2R are exemplary in this aspect - the most mechanical noise free amplifiers I have owned.
We can have two kinds of electrical hum - cause by the input, drive or output stage, that does not depend on volume setting, and that created by input stages before volume or signal grounds - that depend on volume setting. SE are particularly sensitive to any ripple in the power supply, as they do not benefit from differential cancellation. Unbalance in the output stages of push pull amplifiers can create electrical hum. All in general , I can not cover all design variations!
BTW, we listen mostly to harmonics noise - they are much nastier than the 50 or 60 Hz fundamental.
Steve williams
Site Founder, Site Owner, Administrator
resistance is feudal. I see myself running two parallel preamp/amp combo's down the road....Slamma Lamma pre and amps and of course my Pass SS XS pre and amps...
+1
Mike, simply, it is the price of admission...great design, from a great brain, and many, many boxes
.Cheers,
ALF
No worries Steve; Mike, with David’s help will figure it all out...David is mental about grounding; he is one well-grounded!
Cheers!
Alan
Steve williams
Site Founder, Site Owner, Administrator
even if you are only getting 90% of the Lamm ML3 performance magic ? There is no doubt that the ML3's will reach their peak performance/sound with the matching Lamm pre...This is a fact you cannot deny. Given you spent the big doe $$$$ on possibly the best tube amps on the planet, it seems counterproductive to hobble them with a SS preamp from another manufacturer.
Steve williams
Site Founder, Site Owner, Administrator
even if you are only getting 90% of the Lamm ML3 performance magic ? There is no doubt that the ML3's will reach their peak performance/sound with the matching Lamm pre...This is a fact you cannot deny. Given you spent the big doe $$$$ on possibly the best tube amps on the planet, it seems counterproductive to hobble them with a SS preamp from another manufacturer.
I totally agree
Mike...you matched your Dart amps with the Dart pre as that was the best combination. How can you deny that the best Lamm performance is obtained in any way other than with the matching Lamm Signature preamp
I sometimes use a set of mono tube amps, and I prefer them with a good solid state preamp, even over their matching tube preamp. It speeds them up a bit. I am sure the Dart pre is fantastic with the ML3's.
Hi Christian, many congrats on the American Sound and your upcoming new listening room!
It is coming together, it’s close, I will post it up in a short time...thanks for asking.
Cheers!
ALF
I'm sure the Dart will do quite well. It does not have the synergy case though. Lamm's are not slow/sluggish tube electronics either, in my experience using the Lamm LP1 sig phono.
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