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Thread: Tubehunter Class D Stereo Power Amplifier

  1. #11
    Join Date: Apr 2008

    Location: Warrington

    Posts: 2,835
    I'm Neil.

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    Seems like Class D is coming of age.


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  2. #12
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 33,701
    I'm Geoff.

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    I have a reasonably powerful (60 watt) ten year old Tripath power amp that sounds very good indeed. No lack of body and clean with great transparency.

  3. #13
    Join Date: Mar 2017

    Location: London N2

    Posts: 629
    I'm Edward.

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    Adam (Westlover) was over last night and we had a listen again to the Class D amp vs. the Radford. I have a custom thingamajig device that allows me to switch transparently between amps. Whilst the amps are different (in addition to the sound pressure levels) both are highly engaging, musical and, dare I say, emotional. The art of sound in other words.
    Source: Win10 server, Win10 Mini-ITX Renderer running JRiver & Tidal/Roon
    DAC / Preamp: Perreaux DP32, Secondary DAC:
    Chevron Paradox
    Amp: Radford Revival STA25, TubeHunter Class D IRS2092
    Speakers:, Tannoy Eatons, Kudos Cardea C2, BatPure Supertweeters, Acoustic Research 8BX (modded)
    Power Conditioner: ISOtek Qube 1kw
    Currently resting: Radford Revival Prototype preamp, Paul Baldwin 405C amp, PMC LB1 Signature

  4. #14
    Join Date: May 2016

    Location: Notts

    Posts: 1,244
    I'm Geoff.

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    Quote Originally Posted by walpurgis View Post
    I have a reasonably powerful (60 watt) ten year old Tripath power amp that sounds very good indeed. No lack of body and clean with great transparency.
    I bought one of the original battery powered Sonic Impact Tripath amps without knowing anything about class D or Tripath chips. I have now moved on to a pair of Nuprime monoblocks and I can confirm that class D has certainly come of age!

    Geoff
    Last edited by Sherwood; 28-10-2017 at 19:50.

  5. #15
    Join Date: Feb 2010

    Location: Berkshire, UK

    Posts: 2,821
    I'm Tom.

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    Quote Originally Posted by Sherwood View Post
    I bought one of the original battery powered Sonic Unity tripath amps without knowing anything about class D or Tripath chips. I have now moved on to a pair of Nuprime monoblocks and I can confirm that class D has certainly come of age!

    Geoff
    Geoff - which Nuprime monoblocks did you go for? I tried an STA9 stereo and thought while it wasn't **quite** there compared to a good valve amp, I thought it wasn't that far away. (Tannoys are fussy about amps in any case). I remain curious as to how a pair of monoblocked STA9's, ST10s or indeed the latest Nuprime Reference monoblocks would compare.

    I tried to fit in a visit to Nuprime's HQ last time I was in Taiwan (in April) but I didn't quite manage it, but I'll definitely make an attempt to get there at some point next year.
    Main: Speakers 'RFC' Tannoy Canterburys / custom crossovers; Amp - Radford STA100; Pre EAR 912; Vinyl: Thorens TD124 MkII + Ikeda IT345-CR1 / Ortofon 309 Limited tonearms; Cartridges Stereo - Miyajima Madake, Ortofon SPU Royal N + Shure M3D Jico stylus; Mono - Miyajimas - Zero 0.7, Premium 1.0 retipped by Ana Mighty Sound bamboo cantilever, Spirit '78' 3.0 conical from Ana, also vintage GE VRII, Shure M44 strapped for mono with several Expert Stylus conicals for different eras of 78s; Phono stage and SUT from EAR 912; 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: Duncan 'Tuberhunter' 200w class D; preamp - Pass DCB1; Vinyl: Garrard 401 with AT1503 tonearm and vintage SPU-GE; SUTs - Ortofon 2-15k & Bob's Devices; Phono Stage: Schiit Mani; Digital - Trichord Genesis III CDP + Arcam rBlink; Schiit Multibit DAC.

  6. #16
    Join Date: May 2016

    Location: Notts

    Posts: 1,244
    I'm Geoff.

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    Quote Originally Posted by montesquieu View Post
    Geoff - which Nuprime monoblocks did you go for? I tried an STA9 stereo and thought while it wasn't **quite** there compared to a good valve amp, I thought it wasn't that far away. (Tannoys are fussy about amps in any case). I remain curious as to how a pair of monoblocked STA9's, ST10s or indeed the latest Nuprime Reference monoblocks would compare.

    I tried to fit in a visit to Nuprime's HQ last time I was in Taiwan (in April) but I didn't quite manage it, but I'll definitely make an attempt to get there at some point next year.
    I use a pair of STA-9s in monoblock mode. In stereo mode a single STA-9 is good but the performance in bridged mode is rather different: more valve like though the noise floor is extremely low. Superb transients, weighty and extended bass, and very musical. On first use, I did think that the treble may have been a bit rolled off, but that may have been a burn in issue as that is not the case now.

    Geoff

  7. #17
    Join Date: Feb 2010

    Location: Berkshire, UK

    Posts: 2,821
    I'm Tom.

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    Quote Originally Posted by Sherwood View Post
    I use a pair of STA-9s in monoblock mode. In stereo mode a single STA-9 is good but the performance in bridged mode is rather different: more valve like though the noise floor is extremely low. Superb transients, weighty and extended bass, and very musical. On first use, I did think that the treble may have been a bit rolled off, but that may have been a burn in issue as that is not the case now.

    Geoff
    Yes I'd love to have tried a pair rather than a single but there's no UK dealer or distributor and the Dutch outfit I went to wasn't terribly helpful.
    Main: Speakers 'RFC' Tannoy Canterburys / custom crossovers; Amp - Radford STA100; Pre EAR 912; Vinyl: Thorens TD124 MkII + Ikeda IT345-CR1 / Ortofon 309 Limited tonearms; Cartridges Stereo - Miyajima Madake, Ortofon SPU Royal N + Shure M3D Jico stylus; Mono - Miyajimas - Zero 0.7, Premium 1.0 retipped by Ana Mighty Sound bamboo cantilever, Spirit '78' 3.0 conical from Ana, also vintage GE VRII, Shure M44 strapped for mono with several Expert Stylus conicals for different eras of 78s; Phono stage and SUT from EAR 912; 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: Duncan 'Tuberhunter' 200w class D; preamp - Pass DCB1; Vinyl: Garrard 401 with AT1503 tonearm and vintage SPU-GE; SUTs - Ortofon 2-15k & Bob's Devices; Phono Stage: Schiit Mani; Digital - Trichord Genesis III CDP + Arcam rBlink; Schiit Multibit DAC.

  8. #18
    Join Date: May 2016

    Location: Notts

    Posts: 1,244
    I'm Geoff.

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    Quote Originally Posted by montesquieu View Post
    Yes I'd love to have tried a pair rather than a single but there's no UK dealer or distributor and the Dutch outfit I went to wasn't terribly helpful.
    I bought mine directly from www.sonicunity.com

    I believe they offer a 45 day trial so that may be one way to try out a pair.

    Geoff

  9. #19
    Join Date: Feb 2010

    Location: Berkshire, UK

    Posts: 2,821
    I'm Tom.

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    Quote Originally Posted by Sherwood View Post
    I bought mine directly from www.sonicunity.com

    I believe they offer a 45 day trial so that may be one way to try out a pair.

    Geoff
    Sonic Unity are in the US. Don't fancy my chances of getting the 20% VAT or the fat courier brokerage fee back should I decide not to keep them ...
    Main: Speakers 'RFC' Tannoy Canterburys / custom crossovers; Amp - Radford STA100; Pre EAR 912; Vinyl: Thorens TD124 MkII + Ikeda IT345-CR1 / Ortofon 309 Limited tonearms; Cartridges Stereo - Miyajima Madake, Ortofon SPU Royal N + Shure M3D Jico stylus; Mono - Miyajimas - Zero 0.7, Premium 1.0 retipped by Ana Mighty Sound bamboo cantilever, Spirit '78' 3.0 conical from Ana, also vintage GE VRII, Shure M44 strapped for mono with several Expert Stylus conicals for different eras of 78s; Phono stage and SUT from EAR 912; 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: Duncan 'Tuberhunter' 200w class D; preamp - Pass DCB1; Vinyl: Garrard 401 with AT1503 tonearm and vintage SPU-GE; SUTs - Ortofon 2-15k & Bob's Devices; Phono Stage: Schiit Mani; Digital - Trichord Genesis III CDP + Arcam rBlink; Schiit Multibit DAC.

  10. #20
    Join Date: May 2016

    Location: Notts

    Posts: 1,244
    I'm Geoff.

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    Quote Originally Posted by montesquieu View Post
    Sonic Unity are in the US. Don't fancy my chances of getting the 20% VAT or the fat courier brokerage fee back should I decide not to keep them ...
    Fair point re vat but they shipped them very cheaply. Alternatively you can come and hear my pair and visit Sherwood Forest at the same time! At around 1,000 for a pair they are the best 290w per channel amps on the market at present in my view.

    Geoff

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