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  • Class D (Switching) Amps

    Has anyone had experience listening to any of the Class D amps that are showing up. I have seen some that got pretty good review from folks I respect. And I have been surprised by the sound quality of at least one module. I would love to hear what reactions others have to them.

  • #2
    Originally posted by BillH View Post
    Has anyone had experience listening to any of the Class D amps that are showing up. I have seen some that got pretty good review from folks I respect. And I have been surprised by the sound quality of at least one module. I would love to hear what reactions others have to them.

    Only at shows and my reaction has run from awful to lukewarm to interesting. But the Class D amps all seem to have the same characteristics. Flat, kind of unfocussed and loss of information.
    Myles B. Astor, PhD, Administrator
    Senior Editor, Positive-Feedback.com
    ________________________________________

    -Magico S5 Mk.2 speakers with SPod feet
    -cj 40th Anniversary ART300 monoblock amplifiers
    -Merrill Audio Elemente 116 monoblock amplifiers
    -cj GAT preamplifier Series 2 preamplifier
    -Doshi V3.0 phonostage
    -VPI Vanquish direct-drive turntable
    -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
    -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
    -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
    -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
    -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

    Comment


    • #3
      And very dry...
      Kronos Sparta -> Trinity Phono -> Trinity Pre -> CH Precision A1 -> Magico S7s

      Comment


      • #4
        Has anyone had a chance to hear the Mola Mola?
        Myles B. Astor, PhD, Administrator
        Senior Editor, Positive-Feedback.com
        ________________________________________

        -Magico S5 Mk.2 speakers with SPod feet
        -cj 40th Anniversary ART300 monoblock amplifiers
        -Merrill Audio Elemente 116 monoblock amplifiers
        -cj GAT preamplifier Series 2 preamplifier
        -Doshi V3.0 phonostage
        -VPI Vanquish direct-drive turntable
        -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
        -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
        -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
        -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
        -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

        Comment


        • #5
          Have not heard the Mola Mola unless they were at RMAF in which case they sounded quite good. I have always liked Rowland but his new all in one amp at RMAF sounded very dark to me. I heard an Audio Research class D amp at a show a few years ago that sounded fairly good. I never heard it again and I don't know if they pursued it. In general I have found them lifeless but like Myles I have only heard them at shows. But I sure would love to own an amp that weighs only 10 lbs and can fit into a shoe box!
          TW Acustic TT with Ref motor & controller; Tri-Planar Arm; Transfiguration Proteus Cart; Arcam R Phono Preamp; Bluesound Vault-2 Music Server & Streamer; VTL 6.5 preamp, Pass Labs 150.8 Amp; Piega C711 Loudspeakers; Symposium Osiris Rack; Symposium Platforms and Roller Blocks plus grade 2.5 Balls; Shunyata Hydra 8; Shunyata AC Cords; Synergistic Research Atmosphere Excite Level 2X AC Cord & Level 3 HC AC Cord , Audio Art Ref balanced ICs, MIT Oracle IC and Magnum Speaker Cables; Schiitt Headphone Amp; Sennheiser HD700 Headphones; KLAudio Ultrasonic Record Cleaner

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          • #6
            I love your screen name: "1more record 2 clean"

            Comment


            • #7
              ^raises hand^

              I heard them in Tokyo with Lansche speakers. Not your grandpa's class D top end. Very very good in fact. Not sure if it was the Molas or the Ion tweeters but the Molas surely weren't doing any harm. Too bad the rest of the sound wasn't in the same ballpark as the highs. The transition from great highs to ordinary everything else was rather disconcerting. My bet was it was a speaker and not electronics problem.

              Comment


              • #8
                Originally posted by MylesBAstor View Post
                Has anyone had a chance to hear the Mola Mola?
                I've heard them on Giya G3s and thought they were great. Didnt you give them a thumbs up at the NY show also on Giyas (?)
                Linn Kilmax LP12 | Bakoon Japan | Innuos | Klipsch Cornwall IV

                Comment


                • #9
                  Originally posted by BillH View Post
                  I love your screen name: "1more record 2 clean"
                  And there always is one more Bill.🙄🙄🙄

                  Mark
                  TW Acustic TT with Ref motor & controller; Tri-Planar Arm; Transfiguration Proteus Cart; Arcam R Phono Preamp; Bluesound Vault-2 Music Server & Streamer; VTL 6.5 preamp, Pass Labs 150.8 Amp; Piega C711 Loudspeakers; Symposium Osiris Rack; Symposium Platforms and Roller Blocks plus grade 2.5 Balls; Shunyata Hydra 8; Shunyata AC Cords; Synergistic Research Atmosphere Excite Level 2X AC Cord & Level 3 HC AC Cord , Audio Art Ref balanced ICs, MIT Oracle IC and Magnum Speaker Cables; Schiitt Headphone Amp; Sennheiser HD700 Headphones; KLAudio Ultrasonic Record Cleaner

                  Comment


                  • #10
                    Originally posted by Rob View Post

                    I've heard them on Giya G3s and thought they were great. Didnt you give them a thumbs up at the NY show also on Giyas (?)

                    Yes I did in an oasis of sound.
                    Myles B. Astor, PhD, Administrator
                    Senior Editor, Positive-Feedback.com
                    ________________________________________

                    -Magico S5 Mk.2 speakers with SPod feet
                    -cj 40th Anniversary ART300 monoblock amplifiers
                    -Merrill Audio Elemente 116 monoblock amplifiers
                    -cj GAT preamplifier Series 2 preamplifier
                    -Doshi V3.0 phonostage
                    -VPI Vanquish direct-drive turntable
                    -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
                    -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
                    -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
                    -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
                    -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

                    Comment


                    • #11
                      I haven't heard any yet but have heard some good reviews from people that have tried them. Emotiva is supposed to be bringing out some during this year. Interested to hear some reviews of them.

                      Comment


                      • #12
                        In the next few weeks I should be getting a pair of Nord One UP NC500MB NC500 Mono Amps loaned from a friend to demo. If they are as expected, I'll be ordering a pair for myself with a couple different input buffer opamp choices. This will allow me to do some opamp-rolling.
                        Last edited by MikeCh; 04-02-2016, 11:23 AM.
                        Mike
                        Avanti Audio

                        Comment


                        • #13
                          Originally posted by BillH View Post
                          Has anyone had experience listening to any of the Class D amps that are showing up. I have seen some that got pretty good review from folks I respect. And I have been surprised by the sound quality of at least one module. I would love to hear what reactions others have to them.
                          I've read some recent reviews of newer Class D amps like the SPEC out of Japan that seem quite promising. Perhaps I'll be able to hear a few in Newport in a couple of months.

                          I did listen to some class D amps a few years back in my own system. I had some Hypex amps and some Nuforce amps. At first listen they had very good bass but after longer term listening, highs could be a bit unpleasant and soundstage wasn't great. One theory that I had was that Class D amps can put a lot of noise back into the power grid and that noise can adversely affect one's other gear. I found that the Nuforce amps sounded much better when I took rather extreme power conditioning measures, which seemed to validate my hypothesis. When used with beefy isolation transformers which were then fed into an Audience power conditioner, sound quality improved quite a bit.

                          ---Gary
                          Analog: Scheu + Immedia RPM tonearm + Koetsu Black + Pass Xono or Threshold FET 10pe
                          Amps: First Watt F7, HK Citation II
                          Pre-Amps: CJ Premier 14, Threshold FET 10e, DIY 417a with output transformer
                          Speakers: Horning Eufrodite, Reference 3A mm de capo
                          Tuners: Sansui TU9900, McIntosh MR78
                          Digital: i7 Server (Roon) + SSD, Sonore urendu + Mutec MC3+ USB + Berkeley Alpha Dac, Audiomeca Mephisto
                          Power: Audience AR12, Torus Tot, DIY filters

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                          • #14
                            I have a pair of the Hypex Ncore NC400 that have become my main amps. I also have a pair of the Nord NC500 with the Sonic Imagery 994 inputs ordered.
                            Marty

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                            • #15
                              I've only heard Class D amps at shows but outside of the Rowlands, these amplifier just aren't involving and seem too squeaky clean to me.
                              Myles B. Astor, PhD, Administrator
                              Senior Editor, Positive-Feedback.com
                              ________________________________________

                              -Magico S5 Mk.2 speakers with SPod feet
                              -cj 40th Anniversary ART300 monoblock amplifiers
                              -Merrill Audio Elemente 116 monoblock amplifiers
                              -cj GAT preamplifier Series 2 preamplifier
                              -Doshi V3.0 phonostage
                              -VPI Vanquish direct-drive turntable
                              -VPI 12-inch 3D Fat Boy dual pivot tonearm, VPI 12-inch 3D Fat Boy gimballed and SAT LM-12 arm
                              -Lyra Atlas SL, Fuuga, vdh Colibri Master Signature, MOFI Master Tracker, Sumiko Songbird cartridges
                              -Technics RS1506 with Flux Magnetic heads, Doshi V3.0 tape stage (balanced)
                              -Assorted cables including Transparent XL Gen. 5, Allnic cables, Skogrand, Viero, Kubala-Sosna, MG Audio, Audience Au24SX, Genesis Advanced Technologies Power Cords
                              -Accessories including Stillpoint Aperture panels, Cathedral Sound panels, Furutech NCF Nano AC receptacles; Silver Circle Tchaik 6 PLC, Symposium ISIS and SRA Craz racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA platforms.

                              Comment

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