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Thread: Audio Innovations s500

  1. #1
    Join Date: Mar 2016

    Location: Brighton, UK.

    Posts: 3,072
    I'm Mike.

    Default Audio Innovations s500

    Is there really much difference between the older model which allows for 16 ohm 'tap' and apparently has a better transformer? Been looking at a few on ebay and other sites. Might get some mods done as well if I get hold of one, of which there seem to be many.
    Current system 1210 GR. CDP - Meridian G08. Amp -Sugden A21I - Sig. Wharfedale Lintons.

  2. #2
    Join Date: Mar 2009

    Location: Nottingham

    Posts: 625
    I'm Ian.

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    Hmmmm i used to run of the early models sounded great but reliability wasnt its strong point, it was a long time ago now but something to do with shared resistors on the output valves if i remember correctly, the tl12.1 that replaced them were better in all respects, still miss th
    em

  3. #3
    Join Date: Mar 2009

    Location: Nottingham

    Posts: 625
    I'm Ian.

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    There was a fancy way of wiring bi+tri wire speakers to the terminals too but i cant remember the details something to do with optimising the wiring on the different taps

  4. #4
    Join Date: Sep 2014

    Location: Northern Ireland

    Posts: 1,403
    I'm John.

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    Think AudioAl has one, he might know.

    No big shock there I suppose, what hasn’t he got

  5. #5
    Join Date: Nov 2008

    Location: North Down /Northern Ireland/ UK

    Posts: 19,484
    I'm Neil.

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    Early ones sound better than later. The issue as designer Eric Anderson told me was Peter Q insisting on the case, they overheat easily and that causes the reliability issues. Use it on a top shelf, and with suitable speakers and they sound lovely.

    I have one and while I don't use it currently I wont part with mine, mine has the better transformers.
    Regards Neil

  6. #6
    Join Date: Mar 2016

    Location: Brighton, UK.

    Posts: 3,072
    I'm Mike.

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    Quote Originally Posted by Spectral Morn View Post
    Early ones sound better than later. The issue as designer Eric Anderson told me was Peter Q insisting on the case, they overheat easily and that causes the reliability issues. Use it on a top shelf, and with suitable speakers and they sound lovely.

    I have one and while I don't use it currently I wont part with mine, mine has the better transformers.
    Emmm, I tend to keep my amps on for long periods, 4+ hrs, sounds like a fire hazard.
    Current system 1210 GR. CDP - Meridian G08. Amp -Sugden A21I - Sig. Wharfedale Lintons.

  7. #7
    Join Date: Oct 2016

    Location: London

    Posts: 313
    I'm David.

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    I do a choke mod for these which gets rid of most of the heat issues. Both the older and newer output txs sound good, with the older ones having the edge. Some older ones need a rewire as this oxidises and crumbles badly on some examples while it's absolutely fine on others. With a few component changes and a service these make fine sounding, reliable amps
    David

    Sent from my ONEPLUS A5000 using Tapatalk

  8. #8
    Audio Al is offline Pishanto Specialist & Super-Daftee
    Join Date: May 2012

    Location: Dagenham Essex

    Posts: 11,215
    I'm Allen.

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    Quote Originally Posted by JohnJo View Post
    Think AudioAl has one, he might know.

    No big shock there I suppose, what hasn’t he got


    Yes I do indeed have one , Its superb , 4 / 8 / 16 Ohm taps , My one has never gone wrong , Had it reserected by Amp Regen, Then 5 years later Rebuilt by David at AD Audio
    My unit has the better transformers fitted
    [

  9. #9
    Join Date: Nov 2008

    Location: North Down /Northern Ireland/ UK

    Posts: 19,484
    I'm Neil.

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    Quote Originally Posted by Mikeandvan View Post
    Emmm, I tend to keep my amps on for long periods, 4+ hrs, sounds like a fire hazard.
    Not a problem if its on a top shelf with good air flow. It will though be pretty hot at switch off.

    Eric argued hard with Peter Q not to insist on the case it got, everything is too cramped, but if it had gone into the case Eric wanted it would not be the lovely looking amp it is. I think another 15 mm of height in the lower section would have helped, plus side vents, but it is what it is. I used mine for many years with the only issue being a resistor below a valve blowing after first switch on, after I had not used it in a long while.
    Regards Neil

  10. #10
    Join Date: May 2018

    Location: Somerset

    Posts: 79
    I'm Paul.

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    I loved mine but it blew up after a few years and had the circuit board replaced, it never sounded quite the same after.
    Out here on the perimeter there are no stars
    Out here we is stoned, immaculate
    The WASP - The Doors

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