Audio Research Dual 51

vmaxer
vmaxer Posts: 5,117
in 2 Channel Audio
Not sure I'm in the correct place but does anyone know anything about this amp??
Pio Elete Pro 520
Panamax 5400-EX
Sunfire TGP 5
Micro Seiki DD-40 - Lyra-Dorian and Denon DL-160
PS Audio GCPH phono pre
Sunfire CG 200 X 5
Sunfire CG Sig 405 X 5
OPPO BDP-83 SE
SDA SRS 1.2TL Sonicaps and Mills
Ctr CS1000p
Sur - FX1000 x 4
SUB - SVS PB2-Plus

Workkout room:
Sony Bravia XBR- 32-Inch 1080p
Onkyo TX-DS898
GFA 555
Yamaha DVD-S1800BL/SACD
Ft - SDA 1C

Not being used:
RTi 38's -4
RT55i's - 2
RT25i's -2, using other 2 in shop
LSI 15's
CSi40
PSW 404
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Comments

  • vmaxer
    vmaxer Posts: 5,117
    A friend brought one by along with an Audio Research High Definition Stereo Control pre amp, model SP3 A1
    Pio Elete Pro 520
    Panamax 5400-EX
    Sunfire TGP 5
    Micro Seiki DD-40 - Lyra-Dorian and Denon DL-160
    PS Audio GCPH phono pre
    Sunfire CG 200 X 5
    Sunfire CG Sig 405 X 5
    OPPO BDP-83 SE
    SDA SRS 1.2TL Sonicaps and Mills
    Ctr CS1000p
    Sur - FX1000 x 4
    SUB - SVS PB2-Plus

    Workkout room:
    Sony Bravia XBR- 32-Inch 1080p
    Onkyo TX-DS898
    GFA 555
    Yamaha DVD-S1800BL/SACD
    Ft - SDA 1C

    Not being used:
    RTi 38's -4
    RT55i's - 2
    RT25i's -2, using other 2 in shop
    LSI 15's
    CSi40
    PSW 404
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    The ARC D-51 and SP3a-1 are from the classic Audio Research era, especially the preamp. I believe I have schematics for them if you need. The pass transistor used in the preamp's power supply will often fail and require replacing and power supply filter caps should be checked out. I believe ARC offers service and upgrading to maintain the value. The preamp can sell for triple what it originally sold for.
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  • vmaxer
    vmaxer Posts: 5,117
    Ken,

    Thanks a lot for the information. I will PM you my email as I would love to have the schematics for them. Not sure I will keep them or not yet.
    Pio Elete Pro 520
    Panamax 5400-EX
    Sunfire TGP 5
    Micro Seiki DD-40 - Lyra-Dorian and Denon DL-160
    PS Audio GCPH phono pre
    Sunfire CG 200 X 5
    Sunfire CG Sig 405 X 5
    OPPO BDP-83 SE
    SDA SRS 1.2TL Sonicaps and Mills
    Ctr CS1000p
    Sur - FX1000 x 4
    SUB - SVS PB2-Plus

    Workkout room:
    Sony Bravia XBR- 32-Inch 1080p
    Onkyo TX-DS898
    GFA 555
    Yamaha DVD-S1800BL/SACD
    Ft - SDA 1C

    Not being used:
    RTi 38's -4
    RT55i's - 2
    RT25i's -2, using other 2 in shop
    LSI 15's
    CSi40
    PSW 404
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    I'll ask my wife to scan them and send.
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    You should have received them.
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  • vmaxer
    vmaxer Posts: 5,117
    I did, thank you much!!
    Pio Elete Pro 520
    Panamax 5400-EX
    Sunfire TGP 5
    Micro Seiki DD-40 - Lyra-Dorian and Denon DL-160
    PS Audio GCPH phono pre
    Sunfire CG 200 X 5
    Sunfire CG Sig 405 X 5
    OPPO BDP-83 SE
    SDA SRS 1.2TL Sonicaps and Mills
    Ctr CS1000p
    Sur - FX1000 x 4
    SUB - SVS PB2-Plus

    Workkout room:
    Sony Bravia XBR- 32-Inch 1080p
    Onkyo TX-DS898
    GFA 555
    Yamaha DVD-S1800BL/SACD
    Ft - SDA 1C

    Not being used:
    RTi 38's -4
    RT55i's - 2
    RT25i's -2, using other 2 in shop
    LSI 15's
    CSi40
    PSW 404
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  • rooftop59
    rooftop59 Posts: 8,121
    Now that's beyond awesome customer service; that's just a sweet gesture by a great member of the forum. U rock @KennethSwauger!
    Living Room 2.2: Usher BE-718 "tiny dancers"; Dual DIY Dayton audio RSS210HF-4 Subs with Dayton SPA-250 amps; Arcam SA30; Musical Fidelity A308; Sony UBP-x1000es
    Game Room 5.1.4:     Denon AVR-X4200w; Sony UBP-x700; Definitive Technology Power Monitor 900 mains, CLR-3000 center, StudioMonitor 350 surrounds, ProMonitor 800 atmos x4; Sub - Monoprice Monolith 15in THX Ultra
    Bedroom 2.1     Harmon Kardon HK3490; Bluesounds Node N130; Polk RT25i; ACI Titan Subwoofer
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    Glad to be of help, my wife did all the work actually.
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  • vmaxer
    vmaxer Posts: 5,117
    KennethSwauger wrote: »
    Glad to be of help, my wife did all the work actually.

    Well thank her for me as well.
    Pio Elete Pro 520
    Panamax 5400-EX
    Sunfire TGP 5
    Micro Seiki DD-40 - Lyra-Dorian and Denon DL-160
    PS Audio GCPH phono pre
    Sunfire CG 200 X 5
    Sunfire CG Sig 405 X 5
    OPPO BDP-83 SE
    SDA SRS 1.2TL Sonicaps and Mills
    Ctr CS1000p
    Sur - FX1000 x 4
    SUB - SVS PB2-Plus

    Workkout room:
    Sony Bravia XBR- 32-Inch 1080p
    Onkyo TX-DS898
    GFA 555
    Yamaha DVD-S1800BL/SACD
    Ft - SDA 1C

    Not being used:
    RTi 38's -4
    RT55i's - 2
    RT25i's -2, using other 2 in shop
    LSI 15's
    CSi40
    PSW 404
    · Share on FacebookShare on Twitter
  • [Deleted User]
    [Deleted User] Posts: 7,658
    Will do.
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  • pitdogg2
    pitdogg2 Posts: 25,441
    Ken is a keeper for sure. A few years ago he came across some wire he thought was pretty decent. He posted a thread to see if any of us wanted to try it. A few of us did I was one and I am still using it, he put RCA's on it and ship all on his dime.
    GREAT GUY. There aren't many left at Polk like Ken and Kim. When Mark left and Helen retired I was a little worried but these guys ROCK.

    Ivan
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  • [Deleted User]
    [Deleted User] Posts: 7,658
    edited November 2016
    Something I should have mentioned earlier, if the D-51 is going to be used with an SDA speaker then the connections will be different than usual. The negative speaker terminal should be connected to the amp's "4" ohm tap instead of the "0" tap. Then the positive speaker connection will be to the "8" ohm tap if the speaker is 4 ohm and if the speaker is 8 ohm then use the "16" ohm tap for connection.
    "pitgogg2" I'm glad you're still using the RG62 based cables, I made some a few months ago for myself for a long tape deck connection.
    Post edited by [Deleted User] on
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  • sucks2beme
    sucks2beme Posts: 5,601
    A few years ago I emailed a request for the manual for my ARC amp to ARC.
    I paid $10 for it. They sent me that and a set of original sales flyers.
    It included schematics.
    They also answered some questions about the best tubes to use with it.
    Hard to go wrong with any of their products.
    "The legitimate powers of government extend to such acts only as are injurious to others. But it does me no injury for my neighbour to say there are twenty gods, or no god. It neither picks my pocket nor breaks my leg." --Thomas Jefferson
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