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Thread: Koss PRO-4 AA vintage headpones

  1. #31
    Join Date: Feb 2008

    Location: Sunny (occasionally) Devon

    Posts: 1,758
    I'm Shane.

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    If you want uber-kool 70's headphones, there's rally only one contender:



    If on the other hand you want good 70's headphones that won't give you cauliflower ears and neck muscles like the Minotaur (unlike anything Koss ever came up with!), then again, there's only one contender:

    Time flies like an arrow.
    Fruit flies like a banana.

  2. #32
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,496
    I'm AudioAl'sArbiterForPISHANTO.

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    Do you know, believe it or not, that's one thing I've never heard is a pair of electrostatic headphones. Somehow, they've always passed me by.....

    I prefer the look of the Koss, though, although doubtless the Stax would sound much better

    However, I'm still expecting the PRO4-AAs to be potential 'giant-killers'. Any headphones which cost nearly a week's wages for some people in 1972, and yet only cost £70 now, have to be high in the SPPV stakes!

    Marco.
    Main System

    Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & regulator mods]. Funk Firm APM Achromat with Nagaoka GL-601 Crystal Record Weight. Isonoe feet & boots. Ortofon RS-212D tonearm with Denon DL-103GL, in a Denon PCL-300 headshell, fitted with Funk Firm Houdini and Kondo SL-115 pure-silver cartridge leads.

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and Denon AU-310 SUT.

    Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.

    CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.

    Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.

    Preamps: Heavily-modified Croft Charisma-X. Power Amps: Tube Distinctions Copper Amp, fitted with Tungsol KT-150s. Quad 306.

    Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.

    Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.

    Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.

  3. #33
    Join Date: Dec 2008

    Location: Yorks

    Posts: 16,643
    I'm Nobody.

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    Quote Originally Posted by Marco View Post
    However, I'm still expecting the PRO4-AAs to be potential 'giant-killers'. Any headphones which cost nearly a week's wages for some people in 1972, and yet only cost £70 now, have to be high in the SPPV stakes!
    they were quite expensive taking into account you could buy say a Trio 'KA200A' amplifier for around £36 back in '72 depending where you went..get this though you could buy a Ferrograph Series Seven: '702D' for just under £300.00, that is an inequivalent of approx £3,000 these days

  4. #34
    Join Date: Feb 2010

    Location: Plymouth, UK

    Posts: 458
    I'm invisible.

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    I've still got mine and also the Koss case to put them in. Bought them in 75/6. Haven't used them for ages so I'm going to have to get them out of the cupboard and see how they stack up to the HD650s I use now.....
    If only it was that simple

    Main System :
    Quad II/40 amps, Music First passive pre, Tannoy Stirling SE speakers, Technics 1200 + RB301, V-LPS, digital streaming from Mac mini via Lifatec Toslink to Moon 300D. Meier Corda Arietta headphone amp, Sennheiser HD650 Phones. Mark Grant i/c cables. Speaker cables, Audioquest Rocket 44 BiWire.


    Ray.

  5. #35
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,496
    I'm AudioAl'sArbiterForPISHANTO.

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    Hi Ray,

    That would be very interesting, so let us know how you get on

    Andre, WOW... Shows the sheer the quality of Ferrograph gear!

    Marco.
    Main System

    Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & regulator mods]. Funk Firm APM Achromat with Nagaoka GL-601 Crystal Record Weight. Isonoe feet & boots. Ortofon RS-212D tonearm with Denon DL-103GL, in a Denon PCL-300 headshell, fitted with Funk Firm Houdini and Kondo SL-115 pure-silver cartridge leads.

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and Denon AU-310 SUT.

    Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.

    CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.

    Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.

    Preamps: Heavily-modified Croft Charisma-X. Power Amps: Tube Distinctions Copper Amp, fitted with Tungsol KT-150s. Quad 306.

    Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.

    Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.

    Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.

  6. #36
    Join Date: Dec 2008

    Location: Yorks

    Posts: 16,643
    I'm Nobody.

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    Aye sure does
    Last edited by Rare Bird; 20-02-2011 at 03:31.

  7. #37
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,496
    I'm AudioAl'sArbiterForPISHANTO.

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    Whoa.... Nice one. Thanks for posting that, dude - can't wait to get them now

    Marco.
    Main System

    Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & regulator mods]. Funk Firm APM Achromat with Nagaoka GL-601 Crystal Record Weight. Isonoe feet & boots. Ortofon RS-212D tonearm with Denon DL-103GL, in a Denon PCL-300 headshell, fitted with Funk Firm Houdini and Kondo SL-115 pure-silver cartridge leads.

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and Denon AU-310 SUT.

    Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.

    CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.

    Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.

    Preamps: Heavily-modified Croft Charisma-X. Power Amps: Tube Distinctions Copper Amp, fitted with Tungsol KT-150s. Quad 306.

    Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.

    Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.

    Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.

  8. #38
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,496
    I'm AudioAl'sArbiterForPISHANTO.

    Default

    Here's someone from the 70s wearing Koss headphones. As a bonus to win a packet of chocolate cigarettes and some space dust, can you tell me what the turntable is featured?





    Marco.
    Main System

    Turntable: Heavily-modified Technics SL-1210MK5G [Mike New bearing/ETP platter/Paul Hynes SR7 PSU & regulator mods]. Funk Firm APM Achromat with Nagaoka GL-601 Crystal Record Weight. Isonoe feet & boots. Ortofon RS-212D tonearm with Denon DL-103GL, in a Denon PCL-300 headshell, fitted with Funk Firm Houdini and Kondo SL-115 pure-silver cartridge leads.

    Paul Hynes MC head amp/SR5 PSU. Also modded Lentek head amp and Denon AU-310 SUT.

    Other Cartridges: Nippon Columbia (NOS 1987) Denon DL-103. USA-made Shure SC35C with NOS stylus. Goldring G820 with NOS stylus. Shure M55E with NOS stylus.

    CD Player: Audiocom-modified Sony X-777ES/DAS-R1 DAC.

    Tape Deck: Tandberg TCD 310, fully restored and recalibrated as new by RDE, plus upgraded with heads from the TCD-420a. Also with matching TM4 Norway microphones.

    Preamps: Heavily-modified Croft Charisma-X. Power Amps: Tube Distinctions Copper Amp, fitted with Tungsol KT-150s. Quad 306.

    Cables & Sundries: Mark Grant HDX1 interconnects and digital coaxial cable, plus Mark Grant 6mm UP-LCOFC Van Damme speaker cable. MCRU 'Ultimate' mains leads. Lehmann clone headphone amp with vintage Koss PRO-4AAA headphones.

    Tube Distinctions digital noise filter. VPI HW16.5 record cleaning machine.

    Speakers: Tannoy 15MGs in Lockwood cabinets with modified crossovers. 1967 Celestion Ditton 15.

  9. #39
    Join Date: Jan 2009

    Location: Essex

    Posts: 37,706
    I'm openingabottleofwine.

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    These are mine:



    Bloody uncomfortable and sonically not a patch on a pair of mid-priced Sennheiser headphones I once had (Don't remember the model). Unfortuately, a fault developed with the connecting lead on these phone, so I had to throw them away.

    Are Koss still in business? Marco are yours original (NOS), or has someone out there started re-manufacture?

    Regards
    Barry

  10. #40
    Join Date: Dec 2008

    Location: Yorks

    Posts: 16,643
    I'm Nobody.

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    Quote Originally Posted by Barry View Post
    Are Koss still in business? Marco are yours original (NOS), or has someone out there started re-manufacture?
    This is what i'm worried about, if i wouldnt expect the same quality
    Last edited by Rare Bird; 20-02-2011 at 03:31.

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