Announcement

Collapse
No announcement yet.

Doshi Audio V3.0 Tape Preamplifier

Collapse
X
 
  • Filter
  • Time
  • Show
Clear All
new posts

  • Doshi Audio V3.0 Tape Preamplifier

    True to his word, Nick Doshi drove up from Virginia today to drop by and set-up his latest tape preamplifier in my system. Make no mistake. This is one serious tape preamplifier!

    Here are some pictures of his unit.

    Nick with the circuitry section of his tape preamplifier. It is kind of nice to have meters back in the system. On the front of the unit on the left side is a very nice headphone jack (not throwaway by any stretch of the imagination; IIRC, one can also chose between a Class A or A/B mode for head amplifier) and a muting switch that comes in handy when rewinding tape and preventing blown tweeters. To the right of the meters is a switch for selecting either AES/IEC/NAB EQs. Which EQ was selected is indicated by a blue LED. To their right--and normally hidden behind a panel when in use--are controls for adjusting levels and HF EQ. HF EQing is adjustable for 15 ips NAB and IEC as well as 30 ips AES. On the back of the unit are controls for head loading (the same concept as for cartridges), gain and LF EQ as well as outputs, inputs and connections to the power supply. Click image for larger version

Name:	DSC_0159.JPG
Views:	894
Size:	2.50 MB
ID:	27141


    Click image for larger version

Name:	DSC_0157.JPG
Views:	908
Size:	2.60 MB
ID:	27142







    Some better pictures tomorrow!
    Myles B. Astor, PhD, Administrator
    Senior Editor, Positive-Feedback.com
    ________________________________________

    -Zellaton Plural Evo speakers
    -Goldmund Telos 300 stereo amp
    -Goldmund Mimesis 37S Nextgen preamplifier
    -Doshi EVO and Goldmund PH3.8 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 Mk. 2, 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. 6, 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 3 racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA OHIO Class 2.1+ platforms.

  • #2
    Tube complement for those who are interested. Eight tubes including;

    V1/V2: ECC99 (12BH7) Line driver output, one per channel
    V3/V4: ECC81/12AT7 Phase splitter, one per channel
    V5/V6: ECC81/12AT7 IEC EQ amplifier and driver, one per channel
    V7/V8: ECC81/12AT7 NAB EQ amplifier and driver, one per channel

    V1-V2 JJ
    V3-V8 RFT
    Myles B. Astor, PhD, Administrator
    Senior Editor, Positive-Feedback.com
    ________________________________________

    -Zellaton Plural Evo speakers
    -Goldmund Telos 300 stereo amp
    -Goldmund Mimesis 37S Nextgen preamplifier
    -Doshi EVO and Goldmund PH3.8 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 Mk. 2, 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. 6, 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 3 racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA OHIO Class 2.1+ platforms.

    Comment


    • #3
      Looks like a damn nice setup. Enjoy.
      Magnepan 1.6 QR Loudspeakers, Amherst A-2000 MOSFET 150 WPC Amp, Conrad Johnson PV-10A Modded Tube Line & Phono Stage, Electrocompaniet MC II Class A Head Amp, Audio Technica AT-OC9XML Cart (Stereo) , Graham Engineering 2.2 Tonearm (Stereo) , VPI Aries-1 Turntable (Stereo) , VPI Clamp, Denon DL-102 Cart, (Mono) , Luxman Tonearm (Mono) , Kenwood KD-500 Turntable (Mpmp) , Michell Clamp, Marantz 20B Analog FM Tuner, Pioneer SACD, Onkyo DX-6800 CD Transport, DIY 24B/192K DAC, Sennheiser HD-650 Headphones, Headroom Max Balanced Headphone Amp, DIY Silver Interconnects

      Comment


      • #4
        It will be a tapehead classic.

        Comment


        • #5
          Myles, whats your initial a/b take between the Doshi and King Cello?
          TechDAS | Graham Eng | ZYX | B.M.C. | Boulder | Magico

          "Listening to Analogue music is an act of rebellion in a digital gulag" - Simon Yorke

          Comment


          • #6
            Myles, could you post a picture of the rear of the Doshi? Thanks, Larry
            Analog- VPIClassic3-3DArm,SoundsmithZephyrII+MiyajimaZeroMono, 2xAmpex ATR-102,Doshi3.0,Merrill Trident Master Tape Pre,Herron VTPH-2A
            Dig Rip-Pyramix,IzotopeRX3Adv,Mykerinos,PacMicroModel2
            Dig Play-mchNADAC, LampiPac, Roon, HQP, Oppo105
            Electronics-Doshi Pre,CJ MET1mchPre, Cary2A3monoamps
            Speakers-AvantgardeDuosLR,3SolosC,LR,RR
            Other-2x512Engineer/Marutani Symmetrical Power, AudioDiskVinylCleaner,AirTightRecordFlat, Scott Rust Interconnects,
            Music-15KRecs(90%classical),1.3KR2Rtapes,50TBrips

            Comment


            • #7
              Some more hopefully better pics.

              With cover in place. Click image for larger version

Name:	DSC_0161.JPG
Views:	750
Size:	2.73 MB
ID:	27208





              Without cover showing some of the adjustments for setting up the tape preamplifier. Click image for larger version

Name:	DSC_0168.JPG
Views:	781
Size:	2.48 MB
ID:	27209





              Back of preamplifier for Larry. Kind of a pain to pull out but if want more will do tomorrow. Click image for larger version

Name:	DSC_0170.JPG
Views:	701
Size:	2.53 MB
ID:	27211



              Ahh yes, how could I forget the muscle behind the beast?

              Click image for larger version

Name:	DSC_0181.JPG
Views:	734
Size:	2.54 MB
ID:	27212

              Myles B. Astor, PhD, Administrator
              Senior Editor, Positive-Feedback.com
              ________________________________________

              -Zellaton Plural Evo speakers
              -Goldmund Telos 300 stereo amp
              -Goldmund Mimesis 37S Nextgen preamplifier
              -Doshi EVO and Goldmund PH3.8 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 Mk. 2, 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. 6, 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 3 racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA OHIO Class 2.1+ platforms.

              Comment


              • #8
                Originally posted by astrotoy View Post
                Myles, could you post a picture of the rear of the Doshi? Thanks, Larry
                From Nick's website.

                Click image for larger version

Name:	doshi-tape-stage-rear.jpg
Views:	697
Size:	246.6 KB
ID:	27214
                Myles B. Astor, PhD, Administrator
                Senior Editor, Positive-Feedback.com
                ________________________________________

                -Zellaton Plural Evo speakers
                -Goldmund Telos 300 stereo amp
                -Goldmund Mimesis 37S Nextgen preamplifier
                -Doshi EVO and Goldmund PH3.8 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 Mk. 2, 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. 6, 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 3 racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA OHIO Class 2.1+ platforms.

                Comment


                • Bruce B
                  Bruce B commented
                  Editing a comment
                  This is what mine looks like with the balanced in/out. Best tape pre available!!!
                  One balanced output w/ transformer... the other w/o
                  Last edited by Bruce B; 09-11-2016, 12:08 PM.

                • MylesBAstor
                  MylesBAstor commented
                  Editing a comment
                  Since I'm a single ended type guy, Nick had to modify the deck for me. Know that you are all balanced in the studio and it's a different situation.

              • #9
                Thanks, Myles. Larry
                Analog- VPIClassic3-3DArm,SoundsmithZephyrII+MiyajimaZeroMono, 2xAmpex ATR-102,Doshi3.0,Merrill Trident Master Tape Pre,Herron VTPH-2A
                Dig Rip-Pyramix,IzotopeRX3Adv,Mykerinos,PacMicroModel2
                Dig Play-mchNADAC, LampiPac, Roon, HQP, Oppo105
                Electronics-Doshi Pre,CJ MET1mchPre, Cary2A3monoamps
                Speakers-AvantgardeDuosLR,3SolosC,LR,RR
                Other-2x512Engineer/Marutani Symmetrical Power, AudioDiskVinylCleaner,AirTightRecordFlat, Scott Rust Interconnects,
                Music-15KRecs(90%classical),1.3KR2Rtapes,50TBrips

                Comment


                • #10
                  Congrats Myles,

                  Please post your impressions!

                  Nick's components are first class & represent his passion for the hobby.

                  Enjoy!

                  Comment


                  • #11
                    Originally posted by Rob View Post
                    Myles, whats your initial a/b take between the Doshi and King Cello?
                    Let me say this. Both are great tape preamplifiers and you can't go wrong with either unit. Remember also that Nick's tape preamplifier is around 4X the price of the King-Cello.That said, I'm going to defer on any definitive statements because Nick still has some fine tuning to do. It turns out the Nortronics head is high inductance and his loading value (set more for a Studer head) isn't low enough to get the best FR possible just yet. (one thing that should be further improved upon the unit's return is the sense of space.) I'll be sending it back later this week so Nick can make the appropriate modifications to can get the flattest FR.

                    Non-definitive impressions so far. The very first thing you'll hear playing the first tape--or especially early gen tape--is the Doshi's quietness and resolution. Eerily quiet and transparent. Especially if you've got a really transparent system. That quietness changes the "feeling" of the recording. With the Doshi, you're not just listening to The Doors "Riders on the Storm" in your listening room. No. Instead the Doshi magically transports you back to the recording studio.

                    Along with that is the Doshi's articulation of notes--something that Al (AlRainbow) who is a member here and dropped today to hear--commented upon. That was really evident on Grisman's wonderful mandolin solos on the "Arabia" track from that wonderful Grisman-Garcia tape. Notes just start and stop on a dime. Even the tone is slightly better here with Grisman's mandolin still having that ringing resonance without a metallic quality. By the way, the mandolin has appeared on more rock songs that we appreciate: a short list includes Rod Stewart, Led Zep, Jethro Tull, Seals and Croft, Styx, The Band, etc.

                    Another tape that I put on the Yarlung recording of Frederic Rosellet playing Johann Sebastian Bach's Suite No. 3 for solo 'cello in C Major, BWV 1009 along with György Ligeti's Sonata for solo 'cello. I recently picked this tape up and just can't recommend it highly enough. A definite must-have for tapeheads into classical music. The first thing that I noticed here with the Doshi in the system was less image wander with the cello. Two, the strings were simply cleaner sounding. Gone was a slight smearing that while adding some warm to the recording, just wasn't real. Lastly was just the lovely tone of Rosellet's cello. And it's this type of music and this area in particular that the Magicos eat up. There's just an amazing sense of linearity with no particular region drawing attention to itself.
                    Myles B. Astor, PhD, Administrator
                    Senior Editor, Positive-Feedback.com
                    ________________________________________

                    -Zellaton Plural Evo speakers
                    -Goldmund Telos 300 stereo amp
                    -Goldmund Mimesis 37S Nextgen preamplifier
                    -Doshi EVO and Goldmund PH3.8 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 Mk. 2, 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. 6, 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 3 racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA OHIO Class 2.1+ platforms.

                    Comment


                    • #12
                      Funny thing. Although the unit was broken-in, I swore it was sounding better each day. Then I realized Nick had changed the connectors so I could run the tape preamp in single-ended mode. There just seemed more depth to the notes and more information coming through.
                      Myles B. Astor, PhD, Administrator
                      Senior Editor, Positive-Feedback.com
                      ________________________________________

                      -Zellaton Plural Evo speakers
                      -Goldmund Telos 300 stereo amp
                      -Goldmund Mimesis 37S Nextgen preamplifier
                      -Doshi EVO and Goldmund PH3.8 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 Mk. 2, 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. 6, 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 3 racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA OHIO Class 2.1+ platforms.

                      Comment


                      • Gusf
                        Gusf commented
                        Editing a comment
                        Ahh the beauty of a system settling in😍

                    • #13
                      Originally posted by MylesBAstor View Post
                      Funny thing. Although the unit was broken-in, I swore it was sounding better each day. Then I realized Nick had changed the connectors so I could run the tape preamp in single-ended mode. There just seemed more depth to the notes and more information coming through.
                      hows the noise floor in comparison to the king Cello?
                      TechDAS | Graham Eng | ZYX | B.M.C. | Boulder | Magico

                      "Listening to Analogue music is an act of rebellion in a digital gulag" - Simon Yorke

                      Comment


                      • #14
                        Originally posted by Rob View Post

                        hows the noise floor in comparison to the king Cello?
                        Much lower.

                        Let me give you an example. For years, I had the Opus 3 Guitar Quartets recording on LP. Know it was a longtime resident of HP's list but could never get it to sound right on my system. The four guitars always seemed blurred (and blurred together) to me making it hard to actually pinpoint their location. Then Jan-Eric released one of the tracks from the album on the Opus 3 Sampler tape II. Far better sounding than the LP. (In fact in one of our conversations Jan-Eric mentioned he wasn't always happy with the tape transfers back then and in the end, ended up doing the mastering process himself.) Enter the King-Cello. Overall much better sound and feeling and body to the guitar. Then move to the Doshi today. Another world. Much more transparent. Finally, there's that delicacy to the guitars that's missing on many recordings (that was demonstrated to me years ago when Brian Cheney did a live vs. recorded digital copy of a guitar being played at CES. The digital copy was plunk, plunk, plunk. the liver guitar just floated in the air amidst a cloud of sound). On top of that, one can far more easily discern and separate each of the guitars now. Plus there's there's the bloom of the guitar. The tonality of the different guitar is so distinct now that its amazing.
                        Myles B. Astor, PhD, Administrator
                        Senior Editor, Positive-Feedback.com
                        ________________________________________

                        -Zellaton Plural Evo speakers
                        -Goldmund Telos 300 stereo amp
                        -Goldmund Mimesis 37S Nextgen preamplifier
                        -Doshi EVO and Goldmund PH3.8 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 Mk. 2, 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. 6, 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 3 racks, Audiodharma Cable Cooker, Symposium Ultra and assorted SRA OHIO Class 2.1+ platforms.

                        Comment


                        • #15
                          Myles, when you play back a silent portion of a tape, is it quieter, the same , or noisier than a silent groove played back on your LP system?
                          Magnepan 1.6 QR Loudspeakers, Amherst A-2000 MOSFET 150 WPC Amp, Conrad Johnson PV-10A Modded Tube Line & Phono Stage, Electrocompaniet MC II Class A Head Amp, Audio Technica AT-OC9XML Cart (Stereo) , Graham Engineering 2.2 Tonearm (Stereo) , VPI Aries-1 Turntable (Stereo) , VPI Clamp, Denon DL-102 Cart, (Mono) , Luxman Tonearm (Mono) , Kenwood KD-500 Turntable (Mpmp) , Michell Clamp, Marantz 20B Analog FM Tuner, Pioneer SACD, Onkyo DX-6800 CD Transport, DIY 24B/192K DAC, Sennheiser HD-650 Headphones, Headroom Max Balanced Headphone Amp, DIY Silver Interconnects

                          Comment

                          Working...
                          X