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Thread: Tubehunter Class D Stereo Power Amplifier

  1. #1
    Join Date: Mar 2017

    Location: London N2

    Posts: 1,031
    I'm Edward.

    Default Tubehunter Class D Stereo Power Amplifier

    Today I got one of Duncan's (Tubehunter) class D amps which he was flogging the other day. Amp based on modules from Sure Electronics.

    Switched out my Radford STA25 and inserted the Class D Amp - and Wow! Amazing ...

    Had a few hours of settling in and these are singing very sweetly. Wide open, fast and just 'grips' the music. Very precise sound with nice balance across the dynamic range. An easy non fatiguing listen, especially once warmed up. I rather expect that over the next days they will settle in more.

    Honestly I'm shocked how musical this amp is, not as sweet/warm perhaps as my Radford STA25, but still very engaging with lots of depth and 'presentation' - really quite the opposite of what one generally expects of a Class D amp - normally expected to be thin sounding and whatnot.

    Just saying ...
    Source: Tidal/Roon
    DAC: Metrum HEX NOS

    Amp: Sugden Masterclass 2018 spec, Radford Revival STA25,
    Speakers: Tannoy Eaton


  2. #2
    Join Date: Mar 2016

    Location: Barnet, london UK

    Posts: 1,117
    I'm Adam.

    Default

    Damn ! Missed out on one of these.
    Glad you got one Edward, I'd like to hear it
    When I next drop by.
    "lack of passion is fatal"

    Vinyl: Garrard 401, Russ Collinson 'shindo style' plinth / Tenuto gun metal mat / SME-3012 j7 rewired / audio-technica ATP-12T - phonomac modified / Ortofon Vintage SPU GTE /Shure M3D / Ortofon Royal N / Cartridge Man Music Master with isolator / Miyajima Zero B 0.7mil mono / Vintage GE VRII mono / Amps: Radford STA25 mk3 / David Coe AD Audio 'Satchmo' pre & phono / Hashimoto HM-7 SUT / Digital: SW1X Audio Design DAC 1 signature / Roon / Tidal Speakers: Tannoy 12" MGs' in RFC custom 'Rutland' Cabinets with RFC custom crossovers / Cables: Duelund DCA16GA tinned copper / Kimber 12TC / SW1X Audio Design USB-SPdif / Duelund DCA20GA interconnects / SW1X Audio SPDIF Aero 6 / Mains Power Conditioner / Box Furniture sapele rack

  3. #3
    Join Date: Feb 2010

    Location: Berkshire, UK

    Posts: 3,294
    I'm Tom.

    Default

    Funny I was going to post something similar (and I also have an STA25 Mk3 in the main system at the moment)

    This is driving a pair of Tannoy DC6es in my study, preamp is a rather nicely specced Pass B1.

    It sounds very nice indeed, very musical, warm, engaging. I'm rather impressed. I will give it a go in the main rig at some point though the study will be its home. It's replacing a 2024 Tripath I also got from Duncan and while I really liked that amp this is most definitely an improvement. Very grown up sound and not in the least grainy or cold which you sometimes get from digital.
    Main: Speakers 'RFC' Tannoy Canterburys / custom crossovers with Tannoy ST25 supertweeters; Amp - Radford STA100; Pre EAR 912; Vinyl: Thorens TD124 MkII + Ikeda IT345-CR1 9 inch and Ikeda IT-407 12 inch tonearms; Cartridges Stereo - Miyajima Madake, Miyajima Takumi, Ikeda 9TT, SAEC/Excel C3; Mono - Miyajimas - Zero 0.7, Premium 1.0, Edison '78' 4.0 conical, and Shure M44 strapped for mono with several Expert Stylus conicals for different eras of 78s; Phono stage and SUT from EAR 912 + Miyajima ETR-Mono SUT; Esoteric Sound Re-Equalizer for equalisation of early mono and 78, switchable in from tape loop; Digital: Audio Note CDT2/II transport, heavily modded AN Kit DAC + Mutec MC3+USB.

    Study: Speakers - Tannoy DC6; Amp: Pass Aleph 'Mini'; tube preamp - Gate Audio tube; Vinyl: Garrard 401 with AT1503 Mk I tonearm and vintage Ortofon SL-15e with matching Ortofon 2-15k SUT; Phono Stage from Gate Audio preamp; Digital - Trichord Genesis III CDP + Arcam rBlink.

  4. #4
    Join Date: Mar 2017

    Location: London N2

    Posts: 1,031
    I'm Edward.

    Default

    Quote Originally Posted by WESTLOWER View Post
    Damn ! Missed out on one of these.
    Glad you got one Edward, I'd like to hear it
    When I next drop by.
    Anytime Adam. In fact you can borrow it when you get your speaker project up and running.

    You back in London or still on hols?
    Source: Tidal/Roon
    DAC: Metrum HEX NOS

    Amp: Sugden Masterclass 2018 spec, Radford Revival STA25,
    Speakers: Tannoy Eaton


  5. #5
    Join Date: Mar 2017

    Location: London N2

    Posts: 1,031
    I'm Edward.

    Default

    Quote Originally Posted by montesquieu View Post
    Funny I was going to post something similar (and I also have an STA25 Mk3 in the main system at the moment)

    This is driving a pair of Tannoy DC6es in my study, preamp is a rather nicely specced Pass B1.

    It sounds very nice indeed, very musical, warm, engaging. I'm rather impressed. I will give it a go in the main rig at some point though the study will be its home. It's replacing a 2024 Tripath I also got from Duncan and while I really liked that amp this is most definitely an improvement. Very grown up sound and not in the least grainy or cold which you sometimes get from digital.

    I've already mentioned to Duncan that I may ask him to build some monoblocks based on these modules/amps. Today's experience takes me closer to that idea.
    Source: Tidal/Roon
    DAC: Metrum HEX NOS

    Amp: Sugden Masterclass 2018 spec, Radford Revival STA25,
    Speakers: Tannoy Eaton


  6. #6
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 37,161
    I'm Geoff.

    Default

    Quote Originally Posted by montesquieu View Post
    Very grown up sound and not in the least grainy or cold which you sometimes get from digital.
    It's not digital Tom.

    Class D and the older Tripath amps are analogue. They use high speed switching to construct the waveform envelope. Rather like AM radio.

  7. #7
    Join Date: Jun 2015

    Location: London/Durham

    Posts: 1,984
    I'm Lawrence.

    Default

    I was mulling over these too, but in the end decided I didn't need it having a good ice power amp. Would still like to hear it though.

    The Virgos are sounding great on the end of my Ariand/Yarland EL34 amp now if you want to hear them. So much so I've arranged to buy the later version of the amp with switchable pentode/triode mode.

    Sent from my NEM-L51 using Tapatalk

  8. #8
    Join Date: Mar 2016

    Location: Barnet, london UK

    Posts: 1,117
    I'm Adam.

    Default

    Thanks Edward, back in the Smoke now.Trying to stop the Mrs. doing the sums to sell up and go to Cornwall, she does this wherever we go!
    Quote Originally Posted by Edwardlon View Post
    Anytime Adam. In fact you can borrow it when you get your speaker project up and running.

    You back in London or still on hols?
    "lack of passion is fatal"

    Vinyl: Garrard 401, Russ Collinson 'shindo style' plinth / Tenuto gun metal mat / SME-3012 j7 rewired / audio-technica ATP-12T - phonomac modified / Ortofon Vintage SPU GTE /Shure M3D / Ortofon Royal N / Cartridge Man Music Master with isolator / Miyajima Zero B 0.7mil mono / Vintage GE VRII mono / Amps: Radford STA25 mk3 / David Coe AD Audio 'Satchmo' pre & phono / Hashimoto HM-7 SUT / Digital: SW1X Audio Design DAC 1 signature / Roon / Tidal Speakers: Tannoy 12" MGs' in RFC custom 'Rutland' Cabinets with RFC custom crossovers / Cables: Duelund DCA16GA tinned copper / Kimber 12TC / SW1X Audio Design USB-SPdif / Duelund DCA20GA interconnects / SW1X Audio SPDIF Aero 6 / Mains Power Conditioner / Box Furniture sapele rack

  9. #9
    Join Date: Jul 2011

    Location: Northamptonish

    Posts: 1,594
    I'm Peter.

    Default

    Quote Originally Posted by WESTLOWER View Post
    Thanks Edward, back in the Smoke now.Trying to stop the Mrs. doing the sums to sell up and go to Cornwall, she does this wherever we go!
    Take her to Middlesbrough in February for your next holiday, Adam, that'll cure her

  10. #10
    Join Date: Aug 2012

    Location: South Beds, UK

    Posts: 1,186
    I'm kickinbacklistenintotchoons.

    Default

    Having now listened for a couple of weeks, my write up on my one of these (a little different, as it has a 500 VA Traffo) is, "For sale, one Quad 405-2, in excellent condition".
    Mike (that's me)'s stuff -

    Analogue:Garrard 401 / OL Silver / AT33PTGII, Remton 383 MkII valve phono
    Make music louder: TVC pre, Nirvana Electronic Works A60, 60W / Ch Class A power
    For when there's no Analogue: Doge 6 CDP
    To discover loads of new music: Spotify into foo'd Xiang Sheng DAC-01A
    Music boxes: Heco Celan 300
    Cleaning duties: Okki Nokki 2

    Y'know, sometimes, Satan, come as a man of peace.

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