Class D for Sound Lab Speakers?

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    • #907
      ACHiPo
      Participant

      There are some very good sounding Class D amps these days. I’m wondering how Class D amps would work with the electrostat load of the PX Sound Lab speakers?

      There are lists of good and not-so-good amps for Sound Labs, but I haven’t seen anything that says what it is about an amp that makes it a good match for Sound Lab speakers? AtmaSphere OTLs seem to handle the impedance curve well, as do Pass Labs (and I’ve heard Boulder and probably Dartzeel and Jeff Rowland Class A/B as well?) What is it about those amps (other than adequate power) that makes them a good match?

    • #928
      ACHiPo
      Participant

      Update: Roger suggested I check out the Benchmark AHB amps and they have glowing reviews. I’ve found some positive statements on driving Martin Logan speakers, but nothing on Sound Lab. Has anyone heard or had experience with these amps on Sound Labs?
      Benchmark AHB2 Power Amplifier

    • #929
      kilkil
      Participant

      I would be interested in hearing them, particularly as a side by side with my Pass amps. I do have a bias to Class A, i’m interested in how close other topologies can get.

    • #930
      ACHiPo
      Participant

      I’d like to hear them as well. Ultimately I decided to pull the trigger on AtmaSphere MA1s as I’ve grown accustomed to the AtmaSphere sound and from what I read they are an outstanding pairing with Sound Labs.

      I heard 545s Sunday with Pass Labs 250.8s and they sounded very good. I’m hoping 645s driven by the MA1s will be at least as good in my room.

      I have a spare 500WPC Wyred4Sound Class D stereo amp that I will use to break in the Sound Labs. I used it when I sent my M60s back to Ralph for refurb and it sounded really good on my Kefs. Not as good as the AtmaSpheres, but better than I expected from an $800 used amp.

    • #932
      kilkil
      Participant

      TWBs city system, i’m guessing?
      I know lots of people like tube amps, and i would love to hear the highly acclaimed Atmaphere’s in my system. I haven’t really heard tubes that i preferred over SS, though i will admit to recently hearing Stax 009s through an LTA Z10e and it is the best i’ve heard an electrostatic headphone to date, this system also sounded excellent powering the original Abyss 1266, which is the first headphone that i heard that i thought sounded better than my Quad system at the time. I may even like the Z10e better than my diy Gilmore designed Dynahi.

    • #933
      ACHiPo
      Participant

      Yes Tom’s city system. I was very impressed by the (big speaker-sized) diminutive 545s. They ran out of gas (bass flapping) but at SPLs much higher than I normally listen (or even comfortable). Tom’s room is quite a bit liver than mine, so I think the 645s will sound fantastic (at least I hope so!)

      I also ordered the MA-1s. I’ll keep my eyes peeled for a used Benchmark or 2 as it might be nice to have a low-heat option to drive the SLs in the summer!

      No new car for me for a few years!

    • #949
      D10
      Participant

      From my experience – no class D amps are good for SL!
      D

    • #954
      drbond
      Participant

      I’ve got a 3 year old pair of Atma-Sphere MA1’s that I’m thinking about rotating out of, if anyone is interested. Just moving on to a different sound.

    • #956
      MikeB
      Participant

      Benchmark AHB2 Power Amplifier: interesting technology, great price! Thanks for heads-up and the link.

      If someone tries one, especially ACHiPo in comparison to your Atma-sphere MA-1’s, please give us a shout out. The 100-watts would seem to be marginal and as such questionable. However, numbers can be misleading. Especially when comparing the more usual Class AB vs A circuits.

      At any rate, hearing (particularly with SoundLabs) is believing! I rule nothing OUT, or for that matter IN based on specifications, technology, part types, topography, etc., without hearing. In our wacky hobby, I’ve been surprised both positively and negatively too many times to believe otherwise.

    • #957
      MikeB
      Participant

      ACHiPo said: “I also ordered the MA-1s.” “I’ll keep my eyes peeled for a used Benchmark or 2 as it might be nice to have a low-heat option to drive the SLs in the summer!”

      I wasn’t going to say so, but now that you have, MA-1’s do indeed add some much welcomed warmth during my midwest winters. Because you already own the M-60’s, you have a clue. However, I can’t imagine the space heater warmth that the MA-2’s must emanate (grin). Then there are the MA-3’s. When firing them up, it must be campfire story and marshmallow roasting time 🙂

    • #961
      ACHiPo
      Participant

      Well, I have the Wyred4Sound Class D. I’ll likely use it to break in the Sound Labs. Will give it a listen, too, just to compare it to the MA-1s.

      Meanwhile I’ve got my eyes peeled for a Benchmark or 2. So far the only used ones I’m finding are very close to new in pricing.

      • This reply was modified 3 months, 3 weeks ago by ACHiPo.
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