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  2. #2

    Re: Jeff Rowland 625 II

    At Ludwig Audio in Belgium.








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  5. #5
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    Re: Jeff Rowland 625 II

    We took this little 625 S2 on trade. Testing it out today. It’s so little!




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    My Systems: http://www.audioshark.org/showthread...481#post158481

    "We can hear everything we measure, but we can't measure everything we hear. Let your ears be your guide."

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  6. #6

    Re: Jeff Rowland 625 II

    Class D?
    Micro Seiki SX-8000 air bearing table, SME 312s arm, SME 3012R arn, Dynavector XV-1s cartridge, Lyra Etna SL cartridge, ARC Ref 3 phono stage, Otari MX-55 2 track R2R, Ampex 350 tape repros, Roon Nucleus Plus music server, PS Audio DSJ DAC, ARC Ref 6, ARC Ref 75 with KT-150s, JBL 4345 speakers, Viero Equilibro Level 3 speaker cables, and Definitive Technology Ref subs.

  7. #7
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    Jeff Rowland 625 II

    Quote Originally Posted by mep View Post
    Class D?
    Class AB with switch mode PSU.


    Sent from my iPhone using Tapatalk Pro
    My Systems: http://www.audioshark.org/showthread...481#post158481

    "We can hear everything we measure, but we can't measure everything we hear. Let your ears be your guide."

    Dealer for: Aqua Hi-Fi, Aurender, AudioQuest Cables & Power Products, Avantgarde Acoustics, Avid HiFi, Bakoon Audio, Berkeley Audio Design, Block Audio, Boulder Amplifiers, Bowers & Wilkins (B&W), Bryston, Chord, Classe’ Audio, Degritter Record Cleaning Machines, Esoteric, FirstWatt, Focal Headphones, Franco Serblin Loudspeakers, Furutech, Fyne Audio Loudspeakers, GigaFoil, Harbeth Loudspeakers, Hegel, HiFi Man, ISO Acoustics, Keces Power Supplies, Kharma Loudspeakers and Electronics, Koetsu Cartridges, Kuzma Turntables, Lumin, Luxman, Magico Loudspeakers, MBL Speakers & Electronics, MSB Technologies, MySonicLabs Phono Cartridges, Naim Audio, Nordost Cables, Ortofon, Pass Labs, Quadraspire, Rega Turntables and Electronics, Shunyata Research, SimAudio, Stein Music Products, Stillpoints, VAC, Vicoustics, Viva Audio, Vivid Audio Loudspeakers, VPI Industries, WireWorld Cables.

    https://suncoastaudio.com/
    Phone: 941-932-0282
    Facebook: https://www.facebook.com/Suncoast-Au...1105178279194/

  8. #8
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    Re: Jeff Rowland 625 II

    Of all the JRDG pieces, this one seems to get the most consistently positive reviews and user accolades.

  9. #9

    Re: Jeff Rowland 625 II

    Quote Originally Posted by Mike View Post
    Class AB with switch mode PSU.


    Sent from my iPhone using Tapatalk Pro
    That's a lot of power in a small case.
    Micro Seiki SX-8000 air bearing table, SME 312s arm, SME 3012R arn, Dynavector XV-1s cartridge, Lyra Etna SL cartridge, ARC Ref 3 phono stage, Otari MX-55 2 track R2R, Ampex 350 tape repros, Roon Nucleus Plus music server, PS Audio DSJ DAC, ARC Ref 6, ARC Ref 75 with KT-150s, JBL 4345 speakers, Viero Equilibro Level 3 speaker cables, and Definitive Technology Ref subs.

  10. #10
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    Re: Jeff Rowland 625 II

    Is this one of the LM3886 chip based amps?

    Quote Originally Posted by mep View Post
    That's a lot of power in a small case.
    Marty

  11. #11
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    Re: Jeff Rowland 625 II

    All, some clarifications on the Rowland M625 S2 stereo amplifier....

    This amp runs in class A/B, not in class D.

    It does not contain an LM3886 module.

    M625 S2's power supply subsystem contains, among other things,a Power Factor Correction (PFC) rectification module, a Switch Mode Power Supply (SMPS), and a bank of 4-pole capacitors.

    Concerning PSU.... There is no PSU inside the M625 amplifier. In the Rowland lingo, PSU is a very specific product. Its full name is Power Storage Unit. PSU is a full chassis external DC power supply created for -- and is compatible with -- the Rowland Aeris DAC, the Conductor Phono stage, and the Corus preamplifier. PSU is based on ultra-capacitors (a.k.a. supercapacitors). it extracts AC in periodic bursts from the AC mains, stores it as DC in the supercap bank, and delivers a continuous clean DC stream to the component downstream. There is no power storage circuitry inside M625 S2.

    More information on the Rowland M625 S2 can be found at:

    Jeff Rowland Design Group › model-625-s2

    Regards, Guido
    Electronics: Rowland Daemon 1500W Superintegrated, Rowland Aeris DAC+PSU, M925 430W monos, Esoteric X-01 transport
    Speakers: Vienna Die Muzik
    Cables: Cardas Clear Beyond XL PCs, Clear Reflection XLR ICs and speaker wires, Clear digital coax

  12. #12
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    Re: Jeff Rowland 625 II

    Fantastic info, thanks Guido

    Quote Originally Posted by GuidoCorona View Post
    All, some clarifications on the Rowland M625 S2 stereo amplifier....

    This amp runs in class A/B, not in class D.

    It does not contain an LM3886 module.

    M625 S2's power supply subsystem contains, among other things,a Power Factor Correction (PFC) rectification module, a Switch Mode Power Supply (SMPS), and a bank of 4-pole capacitors.

    Concerning PSU.... There is no PSU inside the M625 amplifier. In the Rowland lingo, PSU is a very specific product. Its full name is Power Storage Unit. PSU is a full chassis external DC power supply created for the Aeris DAC and the Corus preamplifier. PSU is based on ultra-capacitors (a.k.a. supercapacitors). it extracts AC in periodic bursts from the AC mains, stores it as DC in the supercap bank, and delivers a continuous clean DC stream to the component downstream. There is no power storage circuitry inside M625 S2.

    More information on the Rowland M625 S2 can be found at:

    Jeff Rowland Design Group › model-625-s2

    Regards, Guido
    Marty

  13. #13
    Senior Member
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    Re: Jeff Rowland 625 II

    this is a great amp - has more of a midrange presence than typical SS. i wouldn't say its tube like, but just sounds good. particularly if you are into jazz, vocals, etc.
    Brinkmann Bardo w/ EMT HSD-006 cart, MSB Reference DAC --> Linear Tube Audio MicroZOTL --> Ampzilla 2000, 2nd Edition --> Fyne Audio F1-12

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Jeff Rowland 625 II

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