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  • Audio Classics Releases 9b Amplifier

    Click image for larger version

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    This massive amplifier proves just how much difference an amplifier can make in high quality music reproduction. Its exceptional stability and low distortion along with its tremendous reserves of power, result in remarkably clean performance. Transient response is superb. Built-in metered adjustments. Beautiful precision construction. For superior stereo or monaural reproduction, Audio Classics offers the finest amplifier made today.
    Power Output per Channel:

    Stereo Operation:
    50 WPC @ 4 or 8 Ohms with EL34 tubes
    80WPC @ 4 or 8 Ohms with KT88 tubes

    Mono Operation:
    100 Watts @ 2 or 4 Ohms with EL34 tubes
    160 Watts @ 2 or 4 Ohms with KT88 tubes.

    Total Harmonic Distortion: At full rated power:
    less than 1.0% at mid-frequencies.
    Hum & Noise: Greater than 90 db below rated output

    Damping Factor: 8
    Rated Power Band: 20Hz to 40kHz
    Frequency Response: -3dB 10Hz to 100kHz
    Output Transformers

    Bias Meter

    Input for Rated Output: 1.2 volts RMS
    Input impedance: 100k Ohms
    Unbalanced (RCA) Input
    Balanced (XLR) Input

    Tube Complement: 4 - 12AU7 and 4 - EL34 or 4 - KT88 (not interchangeable!)

    Power Requirements: 120 Volts, 250 Watts

    Output Connectors: 5 way binding post

    Dimensions: (W x H x D) 17.5" (44.5 cm) (including cables) x 8.287" (21.05 cm) (including feet) x 15.876" (40.33 cm)

    Weight: 60 lbs (27 kg)

    Shipping Weight: 70 lbs (32 kg)
    WHAT IS AN AUDIO CLASSIC? It is an enduring work of excellence and authority. Timeless design, flawless performance, outstanding value and reliability. Potential classics are being developed by manufacturers today. Time alone can tell which of them will endure. Surely, they will be found among the companies which are today accepted as the leading authorities. Audio Classics trades in these products, products that will continue to deliver outstanding performance as the years go by. Audio Classics continuously searches for the best equipment for your home entertainment. After all, that's what it takes to be an Audio Classic.

    Contact us to learn more.
    3501 Vestal Road Vestal, NY 13850 Phone: 800-321-2834 or 607-766-3501
    Hours: Mon-Fri 8am - 5:30pm, other hours by appt
    Myles B. Astor, PhD, Administrator
    Senior Editor, Positive-Feedback.com
    ________________________________________

    -Magico S5 Mk.2 speakers with SPod feet
    -Goldmund Telos 280 stereo amp
    -Goldmund Mimesis 37S Nextgen 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 Lambda, Fuuga, vdh Colibri Master Signature, MutechHayabusa, 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, Skogrand, Viero, Kubala-Sosna, Audience Au24SX, Genesis Advanced Technologies and Ensemble 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.

  • #2
    How much?
    Micro Seiki SX-8000 table with flywheel, SME 3012R arm, SME 312S arm, Lyra Etna SL and Dynavector XV-1S cartridges, ARC Ref 3 phono stage, Otari MX-55 tape deck, Ampex 350 repros, Roon Nucleus Plus server, PS Audio DSJ DAC, ARC Ref 6 pre, ARC Ref 75 amp, JBL 4345 speakers, and Def Tech Ref subs.

    Comment


    • Rob
      Rob commented
      Editing a comment
      I saw $8k quoted

  • #3
    Originally posted by mep View Post
    How much?

    Not sure.
    Myles B. Astor, PhD, Administrator
    Senior Editor, Positive-Feedback.com
    ________________________________________

    -Magico S5 Mk.2 speakers with SPod feet
    -Goldmund Telos 280 stereo amp
    -Goldmund Mimesis 37S Nextgen 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 Lambda, Fuuga, vdh Colibri Master Signature, MutechHayabusa, 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, Skogrand, Viero, Kubala-Sosna, Audience Au24SX, Genesis Advanced Technologies and Ensemble 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


    • #4
      What is the connection to the classical Marantz 9?
      My opinions rely on listening mainly to acoustical, non amplified music. I do not care about electronic music or listening to rock at stadium levels, but I enjoy Mahler and Shostakovitch.

      Comment


      • #5
        Originally posted by microstrip View Post
        What is the connection to the classical Marantz 9?

        I could be misremembering our conversation from a year or so at a show but I think it is a copy of the original Marantz 9b, maybe with some updated parts IIRC.
        Myles B. Astor, PhD, Administrator
        Senior Editor, Positive-Feedback.com
        ________________________________________

        -Magico S5 Mk.2 speakers with SPod feet
        -Goldmund Telos 280 stereo amp
        -Goldmund Mimesis 37S Nextgen 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 Lambda, Fuuga, vdh Colibri Master Signature, MutechHayabusa, 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, Skogrand, Viero, Kubala-Sosna, Audience Au24SX, Genesis Advanced Technologies and Ensemble 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


        • #6
          VAC did their best to put the amp back into production again making it as 'original' as possible. I never had a chance to hear them side by side to see how well they pulled it off. One thing you have to give Marantz was they were probably the first audio company to make their gear look like the fine jewelry and therefore the first to bring understated bling (is that an oxymoron?) to the market. Marantz was way ahead of their time.
          Micro Seiki SX-8000 table with flywheel, SME 3012R arm, SME 312S arm, Lyra Etna SL and Dynavector XV-1S cartridges, ARC Ref 3 phono stage, Otari MX-55 tape deck, Ampex 350 repros, Roon Nucleus Plus server, PS Audio DSJ DAC, ARC Ref 6 pre, ARC Ref 75 amp, JBL 4345 speakers, and Def Tech Ref subs.

          Comment


          • #7
            The last time Dick Sequerra and I spoke, he remarked, "I look at today's tube amplifier circuits and say I made that mistake 30 years ago."
            Myles B. Astor, PhD, Administrator
            Senior Editor, Positive-Feedback.com
            ________________________________________

            -Magico S5 Mk.2 speakers with SPod feet
            -Goldmund Telos 280 stereo amp
            -Goldmund Mimesis 37S Nextgen 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 Lambda, Fuuga, vdh Colibri Master Signature, MutechHayabusa, 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, Skogrand, Viero, Kubala-Sosna, Audience Au24SX, Genesis Advanced Technologies and Ensemble 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


            • Rob
              Rob commented
              Editing a comment
              funny one. Or that the majority of today's tube amps are still heavily based on Williamson's work from the late '40s.

          • #8
            Take one look at an old copy of the RCA Receiving Tube manual and you can see that the old tube engineers could make a tube do anything damn thing they wanted it to.
            Micro Seiki SX-8000 table with flywheel, SME 3012R arm, SME 312S arm, Lyra Etna SL and Dynavector XV-1S cartridges, ARC Ref 3 phono stage, Otari MX-55 tape deck, Ampex 350 repros, Roon Nucleus Plus server, PS Audio DSJ DAC, ARC Ref 6 pre, ARC Ref 75 amp, JBL 4345 speakers, and Def Tech Ref subs.

            Comment


            • #9
              Originally posted by mep View Post
              Take one look at an old copy of the RCA Receiving Tube manual and you can see that the old tube engineers could make a tube do anything damn thing they wanted it to.
              Mark,

              Except for signal to noise/ratio - most of these amplifiers were much more noisier than current ones. Click image for larger version

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              My opinions rely on listening mainly to acoustical, non amplified music. I do not care about electronic music or listening to rock at stadium levels, but I enjoy Mahler and Shostakovitch.

              Comment


              • #10
                Francisco-I'm not trying to say that tube amplifier schematics found in the RCA Receiving Tube manual could compete with modern day amplifiers. I was talking about the talent/skill of tube engineers that could design a tube for any purpose/function they needed it to perform. I think the main thing that differentiates modern tube amps from tube amps from yesteryear is the quality of the power supplies and how stiff those power supplies are with SS rectifier bridges and large banks of capacitor storage which simply wasn't possible with tube rectifiers and the small filter networks available for use in the 1950s/1960s. So yes, modern tube gear has a much higher S/N ratio than tube gear from yesteryear.
                Micro Seiki SX-8000 table with flywheel, SME 3012R arm, SME 312S arm, Lyra Etna SL and Dynavector XV-1S cartridges, ARC Ref 3 phono stage, Otari MX-55 tape deck, Ampex 350 repros, Roon Nucleus Plus server, PS Audio DSJ DAC, ARC Ref 6 pre, ARC Ref 75 amp, JBL 4345 speakers, and Def Tech Ref subs.

                Comment

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