12au7 in phono pre

I am very fortunate to have some good relationships on this forum. It’s a pleasure to be a part of such a friendly and supportive community.

@Clipdat and @dromunds have both been kind enough to let go of some great tubes for me to roll in the Vincent (partnered with the Rega Ania)

I just got Drew ‘s shipment today. In that shipment was a pair of 1950’s Mullards. I put one in the phono and omg! The soundstage came so alive in comparison to the Genalec Gold Lion. Cymbals are so sweet sounding. What an amazing experience and I’m only one tube in!!
Thanks to both of you as I have quite a bit of experimentation to look forward to for not a lot of coin.
2ch: PS Audio Stellar Gain pre, 4 x Linn LK240 monoblocks ( bi-amping) Elac Adante AF-61's, SVS SB16 Ultra Subwoofer, Cambridge Audio CXN v2, Rega Planar 2 with Canaro 2 subplatter, dual belt pulley and upgraded bearing, Rega Ania MC cart, Vincent PHO 701 Phono pre with Mullard NOS 12au7, Audioquest Niagara 1000, AQ Thunder, AQ red river XLR's and Victoria IC's, Wireworld Stratus and Aurora power cables, Atlas EOS power cable, Denon 2910 (as transport) Sony CPD355 Jukebox cd

5.1: Marantz sr5003 (feeding mains through HT bypass) Sonus Faber solo center, AQ Carbon HDMI's, Sony XBRx900E, Xbox One S as 4k player, Definitive Technology SM350's surrounds, Tivo Bolt, Harmony Elite remote

Other gear: Totem Rainmakers (not hooked up) Sonos play 5 and play 1's x 2, Audio Technica TT and Edifier active speakers in kids room, JVC XM448 minidisc rack mount, Sony minidisc walkman, Project Debut III (currently not working), Samsung 46, and 2 x32" tvs, Samsung Soundbar, Okki Nokki LP cleaner, Second Harmony remote setup for bedroom, etc etc

Comments

  • gudnoyezgudnoyez Posts: 6,673
    Joe I put in a Electro Harmonix 12Au7 in my Vincent and was surprised, since we have the same Phono Pre would you suggest a Mullard over the Genelac Gold Lion you suggested to me a while back?
    Home Theater
    Parasound Halo A 31 OnkyoTX-NR838 Sony XBR55X850B 55" 4K RtiA9 Fronts CsiA6 Center RtiA3 Rears FxiA6 Side Surrounds Dual Psw 111's Oppo 105D Signal Ultra Speaker Cables & IC's Signal Magic Power Cable Technics SL Q300 Panamax MR4300 Audioquest Chocolate HDMI Cables Audioquest Forest USB Cable

    2 Channel
    Adcom 555II Vincent SA-T1 Marantz SA 15S2 Denon DR-M11 Clearaudio Bluemotion SDA 2.3tl's (Z) edition MIT Terminator II Speaker Cables & IC's Adcom 545II Adcom Gtp-450 Marantz CD5004 Technics M245X SDA 2B's, SDA CRS+

    Stuff for the Head
    JD LABS C5 Headphone Amplifier, Sennheiser HD 598, Polk Audio Buckle, Polk Audio Hinge, Velodyne vPulse, Bose IE2, Sennheiser CX 200 Street II, Sennheiser MX 365

    Shower & Off the beaten path Rigs
    Polk Audio Boom Swimmer, Polk Audio Urchin B)
  • joecoulsonjoecoulson Posts: 2,079
    Holy crap yes. The Sonics I am hearing right now with :
    The Doors -LAWoman
    Beck - morning phase
    Dave Grohl -Play

    Are on a whole different playing field than the G lion. Everything has opened. Bass is tighter. Cymbals are so engaging, but the imaging is off the charts. Huge improvement
    2ch: PS Audio Stellar Gain pre, 4 x Linn LK240 monoblocks ( bi-amping) Elac Adante AF-61's, SVS SB16 Ultra Subwoofer, Cambridge Audio CXN v2, Rega Planar 2 with Canaro 2 subplatter, dual belt pulley and upgraded bearing, Rega Ania MC cart, Vincent PHO 701 Phono pre with Mullard NOS 12au7, Audioquest Niagara 1000, AQ Thunder, AQ red river XLR's and Victoria IC's, Wireworld Stratus and Aurora power cables, Atlas EOS power cable, Denon 2910 (as transport) Sony CPD355 Jukebox cd

    5.1: Marantz sr5003 (feeding mains through HT bypass) Sonus Faber solo center, AQ Carbon HDMI's, Sony XBRx900E, Xbox One S as 4k player, Definitive Technology SM350's surrounds, Tivo Bolt, Harmony Elite remote

    Other gear: Totem Rainmakers (not hooked up) Sonos play 5 and play 1's x 2, Audio Technica TT and Edifier active speakers in kids room, JVC XM448 minidisc rack mount, Sony minidisc walkman, Project Debut III (currently not working), Samsung 46, and 2 x32" tvs, Samsung Soundbar, Okki Nokki LP cleaner, Second Harmony remote setup for bedroom, etc etc
  • gudnoyezgudnoyez Posts: 6,673
    Beck Morning Phase is a fantastic album. I guess my next tube will be a Mullard over the Genelac Gold Lion, thanks for posting.
    Home Theater
    Parasound Halo A 31 OnkyoTX-NR838 Sony XBR55X850B 55" 4K RtiA9 Fronts CsiA6 Center RtiA3 Rears FxiA6 Side Surrounds Dual Psw 111's Oppo 105D Signal Ultra Speaker Cables & IC's Signal Magic Power Cable Technics SL Q300 Panamax MR4300 Audioquest Chocolate HDMI Cables Audioquest Forest USB Cable

    2 Channel
    Adcom 555II Vincent SA-T1 Marantz SA 15S2 Denon DR-M11 Clearaudio Bluemotion SDA 2.3tl's (Z) edition MIT Terminator II Speaker Cables & IC's Adcom 545II Adcom Gtp-450 Marantz CD5004 Technics M245X SDA 2B's, SDA CRS+

    Stuff for the Head
    JD LABS C5 Headphone Amplifier, Sennheiser HD 598, Polk Audio Buckle, Polk Audio Hinge, Velodyne vPulse, Bose IE2, Sennheiser CX 200 Street II, Sennheiser MX 365

    Shower & Off the beaten path Rigs
    Polk Audio Boom Swimmer, Polk Audio Urchin B)
  • joecoulsonjoecoulson Posts: 2,079
    Check your PM
    2ch: PS Audio Stellar Gain pre, 4 x Linn LK240 monoblocks ( bi-amping) Elac Adante AF-61's, SVS SB16 Ultra Subwoofer, Cambridge Audio CXN v2, Rega Planar 2 with Canaro 2 subplatter, dual belt pulley and upgraded bearing, Rega Ania MC cart, Vincent PHO 701 Phono pre with Mullard NOS 12au7, Audioquest Niagara 1000, AQ Thunder, AQ red river XLR's and Victoria IC's, Wireworld Stratus and Aurora power cables, Atlas EOS power cable, Denon 2910 (as transport) Sony CPD355 Jukebox cd

    5.1: Marantz sr5003 (feeding mains through HT bypass) Sonus Faber solo center, AQ Carbon HDMI's, Sony XBRx900E, Xbox One S as 4k player, Definitive Technology SM350's surrounds, Tivo Bolt, Harmony Elite remote

    Other gear: Totem Rainmakers (not hooked up) Sonos play 5 and play 1's x 2, Audio Technica TT and Edifier active speakers in kids room, JVC XM448 minidisc rack mount, Sony minidisc walkman, Project Debut III (currently not working), Samsung 46, and 2 x32" tvs, Samsung Soundbar, Okki Nokki LP cleaner, Second Harmony remote setup for bedroom, etc etc
  • joecoulsonjoecoulson Posts: 2,079
    Here is a shot of the Mullard:

    y8156vzrhazy.jpeg
    2ch: PS Audio Stellar Gain pre, 4 x Linn LK240 monoblocks ( bi-amping) Elac Adante AF-61's, SVS SB16 Ultra Subwoofer, Cambridge Audio CXN v2, Rega Planar 2 with Canaro 2 subplatter, dual belt pulley and upgraded bearing, Rega Ania MC cart, Vincent PHO 701 Phono pre with Mullard NOS 12au7, Audioquest Niagara 1000, AQ Thunder, AQ red river XLR's and Victoria IC's, Wireworld Stratus and Aurora power cables, Atlas EOS power cable, Denon 2910 (as transport) Sony CPD355 Jukebox cd

    5.1: Marantz sr5003 (feeding mains through HT bypass) Sonus Faber solo center, AQ Carbon HDMI's, Sony XBRx900E, Xbox One S as 4k player, Definitive Technology SM350's surrounds, Tivo Bolt, Harmony Elite remote

    Other gear: Totem Rainmakers (not hooked up) Sonos play 5 and play 1's x 2, Audio Technica TT and Edifier active speakers in kids room, JVC XM448 minidisc rack mount, Sony minidisc walkman, Project Debut III (currently not working), Samsung 46, and 2 x32" tvs, Samsung Soundbar, Okki Nokki LP cleaner, Second Harmony remote setup for bedroom, etc etc
  • verbverb Posts: 5,094
    Very nice Joe! Those look minty! :smile:
    Basement: Polk SDA SRS, Rega RP1 TT, VTL 2.5 Preamplifier, Enlightened Audio Designs CD Transport, Northstar Designs DAC, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, Wireworld Oasis 8 RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1 transport, Marantz AMP-1, Acoustic Technologies Classic Speakers, SVS SB12 Plus Subwoofer, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Tjoeb 99 tube CD player (modified Marantz CD-38), Project BoxE Bluetooth Streamer, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • joecoulsonjoecoulson Posts: 2,079
    Thanks to @Clipdat for these guys.
    2ch: PS Audio Stellar Gain pre, 4 x Linn LK240 monoblocks ( bi-amping) Elac Adante AF-61's, SVS SB16 Ultra Subwoofer, Cambridge Audio CXN v2, Rega Planar 2 with Canaro 2 subplatter, dual belt pulley and upgraded bearing, Rega Ania MC cart, Vincent PHO 701 Phono pre with Mullard NOS 12au7, Audioquest Niagara 1000, AQ Thunder, AQ red river XLR's and Victoria IC's, Wireworld Stratus and Aurora power cables, Atlas EOS power cable, Denon 2910 (as transport) Sony CPD355 Jukebox cd

    5.1: Marantz sr5003 (feeding mains through HT bypass) Sonus Faber solo center, AQ Carbon HDMI's, Sony XBRx900E, Xbox One S as 4k player, Definitive Technology SM350's surrounds, Tivo Bolt, Harmony Elite remote

    Other gear: Totem Rainmakers (not hooked up) Sonos play 5 and play 1's x 2, Audio Technica TT and Edifier active speakers in kids room, JVC XM448 minidisc rack mount, Sony minidisc walkman, Project Debut III (currently not working), Samsung 46, and 2 x32" tvs, Samsung Soundbar, Okki Nokki LP cleaner, Second Harmony remote setup for bedroom, etc etc
  • mhardy6647mhardy6647 Posts: 20,982
    edited February 2
    Interesting to see a 12AU7 used in a phono preamp. It's a fairly "low mu" (technically "medium mu") tube compared to the 6922 or 12AX7 ("high mu") amplifier tubes usually used... or is the tube "just" used as a buffer after a solid stare amp/EQ stage in your preamp?

    amplification factor(s) of the 12AU7 = 17.0 (triode 1) and 19.5 (triode 2).
    http://www.tubebooks.org/tubedata/HB-3/Receiving_Tubes_Part_2/12AU7-A.PDF

    amplification factor of the 12AX7 = 100 (both triode sections).
    http://www.tubebooks.org/tubedata/HB-3/Receiving_Tubes_Part_2/12AX7-A.PDF
  • ClipdatClipdat Posts: 5,885
    edited February 2
    I believe the tube is used as a buffer for coloration.

    j9nquxzs72s3.jpeg
    • "Electronic music is human sound adapting to indulge technology, and for some, it feels like the signature sound of energy. New and abstract sounds over hypnotic rhythms can conjure vast soundscapes for escape, pleasure, and transcendence."
  • mhardy6647mhardy6647 Posts: 20,982
    that makes sense
  • joecoulsonjoecoulson Posts: 2,079
    That’s right guys. I don’t know a fraction of what you guys know, I just know when the Mullard went in, the sound was a huge change.
    2ch: PS Audio Stellar Gain pre, 4 x Linn LK240 monoblocks ( bi-amping) Elac Adante AF-61's, SVS SB16 Ultra Subwoofer, Cambridge Audio CXN v2, Rega Planar 2 with Canaro 2 subplatter, dual belt pulley and upgraded bearing, Rega Ania MC cart, Vincent PHO 701 Phono pre with Mullard NOS 12au7, Audioquest Niagara 1000, AQ Thunder, AQ red river XLR's and Victoria IC's, Wireworld Stratus and Aurora power cables, Atlas EOS power cable, Denon 2910 (as transport) Sony CPD355 Jukebox cd

    5.1: Marantz sr5003 (feeding mains through HT bypass) Sonus Faber solo center, AQ Carbon HDMI's, Sony XBRx900E, Xbox One S as 4k player, Definitive Technology SM350's surrounds, Tivo Bolt, Harmony Elite remote

    Other gear: Totem Rainmakers (not hooked up) Sonos play 5 and play 1's x 2, Audio Technica TT and Edifier active speakers in kids room, JVC XM448 minidisc rack mount, Sony minidisc walkman, Project Debut III (currently not working), Samsung 46, and 2 x32" tvs, Samsung Soundbar, Okki Nokki LP cleaner, Second Harmony remote setup for bedroom, etc etc
  • pitdogg2pitdogg2 Posts: 12,570
    joecoulson wrote: »
    That’s right guys. I don’t know a fraction of what you guys know, I just know when the Mullard went in, the sound was a huge change.

    Naaa you were just mesmerized by the mullard orange glow. That electron cookoff will get you everytime.
  • joecoulsonjoecoulson Posts: 2,079
    True^
    2ch: PS Audio Stellar Gain pre, 4 x Linn LK240 monoblocks ( bi-amping) Elac Adante AF-61's, SVS SB16 Ultra Subwoofer, Cambridge Audio CXN v2, Rega Planar 2 with Canaro 2 subplatter, dual belt pulley and upgraded bearing, Rega Ania MC cart, Vincent PHO 701 Phono pre with Mullard NOS 12au7, Audioquest Niagara 1000, AQ Thunder, AQ red river XLR's and Victoria IC's, Wireworld Stratus and Aurora power cables, Atlas EOS power cable, Denon 2910 (as transport) Sony CPD355 Jukebox cd

    5.1: Marantz sr5003 (feeding mains through HT bypass) Sonus Faber solo center, AQ Carbon HDMI's, Sony XBRx900E, Xbox One S as 4k player, Definitive Technology SM350's surrounds, Tivo Bolt, Harmony Elite remote

    Other gear: Totem Rainmakers (not hooked up) Sonos play 5 and play 1's x 2, Audio Technica TT and Edifier active speakers in kids room, JVC XM448 minidisc rack mount, Sony minidisc walkman, Project Debut III (currently not working), Samsung 46, and 2 x32" tvs, Samsung Soundbar, Okki Nokki LP cleaner, Second Harmony remote setup for bedroom, etc etc
  • verbverb Posts: 5,094
    joecoulson wrote: »
    Thanks to @Clipdat for these guys.

    I'm jealous! @Clipdat Drew where did you get those! :smile:
    Basement: Polk SDA SRS, Rega RP1 TT, VTL 2.5 Preamplifier, Enlightened Audio Designs CD Transport, Northstar Designs DAC, Conrad Johnson MF2300A Amp, Furman 15PFi Power Conditioner, Wireworld Oasis 8 RCA IC's, MIT Terminator2 Bi-Wire speaker cables
    Office: PC, Marantz CD-1 transport, Marantz AMP-1, Acoustic Technologies Classic Speakers, SVS SB12 Plus Subwoofer, MIT AVt2 speaker cables, IFI Purifier2, AQ Cinnamon USB cable
    Spare Room: Dayens Ampino Integrated, Tjoeb 99 tube CD player (modified Marantz CD-38), Project BoxE Bluetooth Streamer, Polk TSi200's
    Living Room: Pioneer SX-N30 Network Receiver, Pioneer PD10AE CD Player, Furman M8-LX Power Conditioner, Polk RT265 In Wall Speakers, Polk DSW Pro 660wi Subwoofer
  • ClipdatClipdat Posts: 5,885
    I think it's cool that they made such a big difference.
    • "Electronic music is human sound adapting to indulge technology, and for some, it feels like the signature sound of energy. New and abstract sounds over hypnotic rhythms can conjure vast soundscapes for escape, pleasure, and transcendence."
  • ClipdatClipdat Posts: 5,885
    verb wrote: »
    I'm jealous! @Clipdat Drew where did you get those! :smile:

    Came with the Backert. I believe they are originally from here: http://arizonatubesupply.com/
    • "Electronic music is human sound adapting to indulge technology, and for some, it feels like the signature sound of energy. New and abstract sounds over hypnotic rhythms can conjure vast soundscapes for escape, pleasure, and transcendence."
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