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Thread: Koss PRO-4 AA vintage headpones

  1. #21
    Join Date: Jun 2010

    Location: Southampton

    Posts: 1,623
    I'm drunk.

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    Oooh, happy days.
    I had a pair of Koss Pro4AAs back in the 80s. Absolutely stonking pair of cans. IIRC I paid about 15 notes for them off a mate who was upgrading to a pair of Stax.

  2. #22
    Join Date: Dec 2008

    Location: Yorks

    Posts: 16,643
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    (Feb '72)
    Last edited by Rare Bird; 20-02-2011 at 03:31.

  3. #23
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,466
    I'm AudioAl'sArbiterForPISHANTO.

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    Nice ad, dude - proper headphones and hi-fi mags, eh?

    Cheers, Andy. I'm hoping the new improved components used will result in the PRO4 AAs being even better than they were before

    One other point to note, looking at Andre's ad, is I'm sure that £28 in 1972 was a lot more than the £69.95 they cost today (can anyone convert it approximately?).... So in terms of VFM, they're superb!

    They're due to arrive sometime next week, so there will be full report on them with pics

    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.

  4. #24
    Join Date: Dec 2008

    Location: Yorks

    Posts: 16,643
    I'm Nobody.

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    Quote Originally Posted by Marco View Post
    Nice ad, dude - proper headphones and hi-fi mags, eh?

    Cheers, Andy. I'm hoping the new improved components used will result in the PRO4 AAs being even better than they were before

    One other point to note, looking at Andre's ad, is I'm sure that £28 in 1972 was a lot more than the £69.95 they cost today (can anyone convert it approximately?).... So in terms of VFM, they're superb.
    at a guess £300.

  5. #25
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,466
    I'm AudioAl'sArbiterForPISHANTO.

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    If it's that much, that's mental!

    How do Koss keep the price so low now, I wonder?

    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. #26
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,466
    I'm AudioAl'sArbiterForPISHANTO.

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    Lol - I'm talking about how much my Koss headphones cost, not your ROSS ones.... It was the Koss ones in your add which were priced at £28, no...?

    It did say "PRO-4AA" in bold on the ad....

    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.

  7. #27
    Join Date: Sep 2010

    Location: High Peak, Derbyshire

    Posts: 2,241
    I'm Keith.

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    I had a pair of the Koss ones in 1977. £1 a week for 36 weeks or something from my mum's catalogue. Saturday job money, plus my mum and dad were happy to chip in - can't imagine why

    Sounded great, but made my ears very sweaty and as a kid was prone to getting excema patches where I sweated, so they didn't get used for long periods. No idea what happened to them.
    Keith
    Analogue: Lenco L75 with 'PTP5' top plate in heavy birch ply plinth/re-wired Rega RB300/SAE 1000e HOMC Cartridge/Trans-Fi Reso-Mat/Moth RCM
    Files: Voyage MPD/Custom PC/Supra USB/Beresford ASYNCH-1/Beresford TOSlink cable
    CDP: Inca Katana SE
    DAC: Beresford Caiman MkII (LiPo Battery powered)
    Pre-Amp: Croft Micro 25 Power-Amp: Croft Series 7
    Speakers: DIY Frugel-Horn Mk3 ('FH3') + REL Strata subwoofer
    Headphones: Beyer Dynamics DT990 Pro (250 ohm)/Schiit Asgard Headphone Amp
    Cables - Interconnects: Mark Grant G1000HD Speaker Cables: Van Damme Blue
    Mains: Belkin PF30/Mark Grant DSP2.5 & DSP1.0 Rack: Target

    Office System: HP Win8 Laptop/JRiver/MF V-Link2/Beresford Bushmaster MkII/Topping TP20 Mk2/Mission 771e
    Bedroom System: Raspberry Pi/Raspbrian + MPD/HiFiBerry DAC/Topping TP20 Mk2/Mission 760i or DIY Hybrid Valve-MOSFET Headphone amp + Sennheiser HD595


    Gallery

  8. #28
    Join Date: Dec 2008

    Location: Yorks

    Posts: 16,643
    I'm Nobody.

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    Quote Originally Posted by keiths View Post
    I had a pair of the Koss ones in 1977. £1 a week for 36 weeks or something from my mum's catalogue. Saturday job money, plus my mum and dad were happy to chip in - can't imagine why

    Sounded great, but made my ears very sweaty and as a kid was prone to getting excema patches where I sweated, so they didn't get used for long periods. No idea what happened to them.
    Thats the thing i didnt like about them, the ear cushions made my ears sweat & the headphones felt like they were squashing my head!

  9. #29
    Join Date: Dec 2008

    Location: Yorks

    Posts: 16,643
    I'm Nobody.

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    Quote Originally Posted by Marco View Post
    Lol - I'm talking about how much my Koss headphones cost, not your ROSS ones.... It was the Koss ones in your add which were priced at £28, no...?

    It did say "PRO-4AA" in bold on the ad....

    Marco.
    Yes i just scanned it from the magazine in the attachment

  10. #30
    Join Date: Jan 2008

    Location: Wrexham, North Wales, UK

    Posts: 110,466
    I'm AudioAl'sArbiterForPISHANTO.

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    No worries, dude. Btw, you're about right in terms of inflation... I just looked up a converter, and £28 in '72 equates today to around £292.00

    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.

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