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Thread: FS J SOUNDLAB 300B integrated / power amp

  1. #1
    Join Date: Dec 2012

    Location: Stoke on trent

    Posts: 959
    I'm Steve.

    Default FS J SOUNDLAB 300B integrated / power amp

    J SOUNDLAB 300B single input integrated / power amp.
    In beautiful condition complete with two full sets of valves.

    Much revered by those who have owned one. Midrange to die for but ery punchy and sweet with it.

    Valves are:
    Black treasure 300Bs and General electric small valves.

    I'll check the branding of the others. They all operate fine but I like the black treasures and GEs best.

    I've used this with Dali 104s for a bizarrely good combination for little money and also with my WLM la divas and it sounds great with both, particularly the bloomier sounding Dalis which they gripped perfectly.

    Through my 97DB WLMs, there is a slightest hum that is audible with no music on. Not an issue for most but mentioned for completeness.

    A beautiful looking and sounding amp with real rack presence and feel of quality

    Treat yourself.

    £500

    Located on stoke on Trent

    Photos to follow very shortly!

  2. #2
    Join Date: Feb 2014

    Location: Huntingdonshire

    Posts: 1,413
    I'm Andrew.

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    Ah a thing of beauty this. Get thee behind me Satan!

  3. #3
    Join Date: Dec 2012

    Location: Stoke on trent

    Posts: 959
    I'm Steve.

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  4. #4
    Join Date: Apr 2016

    Location: Gravesend and France

    Posts: 1,498
    I'm paul.

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    Ah, that's the very one I bought from the Girshin brothers who built it. The other pair of RCA sockets I fitted for output to a subwoofer, they after the volume control. I used it with 118db compression drivers and it was silent, maybe a valve is causing the hum. I used Sophia electric premium 6SN7 along with emission labs 300B and were the best sound ever.
    Bakoon 13r Denon DP80 Stax UA-70 Shure Ultra 500 in a Martin Bastin body with jico stylus, project ds2 digital Rullit aero 8 field coils in tqwt speakers

    Office system, DIY CSS fullrange speakers with aurum cantus G2 ribbons yulong dac Sony STR6055 receiver Jvc QL-A51 direct drive turntable, Leema sub. JVC Z4S cart is in the house

    Garage system another Sony receiver, cassette deck


    System components are subject to change without warning and at the discretion of the owner.

  5. #5
    Join Date: Apr 2012

    Location: N E Kent

    Posts: 51,625
    I'm Geoff.

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    Might be an idea to quote specs Steve. Most folk won't know what they are. What speaker impedances are catered for? Power output? (I'm guessing around 7 watts). A photo of inputs/outputs would help too.

  6. #6
    Join Date: Dec 2012

    Location: Stoke on trent

    Posts: 959
    I'm Steve.

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    I think it's 7 or 8 watts. Paul will probably be able to expand more

  7. #7
    Join Date: Apr 2016

    Location: Gravesend and France

    Posts: 1,498
    I'm paul.

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    Quote Originally Posted by Bourney View Post
    I think it's 7 or 8 watts. Paul will probably be able to expand more
    Yes Steve, what's a watt amongst friends. Regardless of watts, the output transformers play a bigger part in the quality than the output in watts. This amp drove quad 63 very well at Scalford
    Bakoon 13r Denon DP80 Stax UA-70 Shure Ultra 500 in a Martin Bastin body with jico stylus, project ds2 digital Rullit aero 8 field coils in tqwt speakers

    Office system, DIY CSS fullrange speakers with aurum cantus G2 ribbons yulong dac Sony STR6055 receiver Jvc QL-A51 direct drive turntable, Leema sub. JVC Z4S cart is in the house

    Garage system another Sony receiver, cassette deck


    System components are subject to change without warning and at the discretion of the owner.

  8. #8
    Join Date: Dec 2012

    Location: Stoke on trent

    Posts: 959
    I'm Steve.

    Default

    Quote Originally Posted by walpurgis View Post
    Might be an idea to quote specs Steve. Most folk won't know what they are. What speaker impedances are catered for? Power output? (I'm guessing around 7 watts). A photo of inputs/outputs would help too.
    It's a single input, with a separate subwoofer output as shown on the photos.

    Speaker terminals are as shown on the photos. A single set facing upwards at the rear. It has that functionally funky look to it with connections in these locations.

  9. #9
    Join Date: Apr 2016

    Location: Gravesend and France

    Posts: 1,498
    I'm paul.

    Default

    Laid out properly, so the point to point wiring is tidy. A picture of the underside would show how well it's built.
    Bakoon 13r Denon DP80 Stax UA-70 Shure Ultra 500 in a Martin Bastin body with jico stylus, project ds2 digital Rullit aero 8 field coils in tqwt speakers

    Office system, DIY CSS fullrange speakers with aurum cantus G2 ribbons yulong dac Sony STR6055 receiver Jvc QL-A51 direct drive turntable, Leema sub. JVC Z4S cart is in the house

    Garage system another Sony receiver, cassette deck


    System components are subject to change without warning and at the discretion of the owner.

  10. #10
    Join Date: Jun 2010

    Location: London, UK

    Posts: 391

    Default

    I photo of the underside from when I had it.
    IMG_0531
    Paul.

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