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Thread: Audio Innovations s500 Choke Power Supply

  1. #1
    Join Date: Oct 2016

    Location: London

    Posts: 235
    I'm David.

    Default Audio Innovations s500 Choke Power Supply

    Iíd been wanting to do this for a long time. Upgrade an AI 500 by converting to a choke power supply along with rewiring, capacitor and resistor upgrades, and upgraded selector switch and volume pot.

    Instead of mounting the components in a separate case a la Border Patrol, I mounted the choke on the rear of the case. The sound quality is the best yet. While I donít have a Border Control power supply for direct comparison this version is right up there, or maybe even better!

    The choke is mounted on the rear panel.

    Sent from my ONEPLUS A5000 using Tapatalk

  2. #2
    Join Date: Nov 2011

    Location: Seaton, Devon, UK

    Posts: 6,540
    I'm Adrian.

    Default

    Quote Originally Posted by AD Audio View Post
    I’d been wanting to do this for a long time. Upgrade an AI 500 by converting to a choke power supply along with rewiring, capacitor and resistor upgrades, and upgraded selector switch and volume pot.

    Instead of mounting the components in a separate case a la Border Patrol, I mounted the choke on the rear of the case. The sound quality is the best yet. While I don’t have a Border Control power supply for direct comparison this version is right up there, or maybe even better!

    The choke is mounted on the rear panel.

    Sent from my ONEPLUS A5000 using Tapatalk
    I used to have a try-wired one with stepped volume pot and it sounded wonderful, I bet yours with the choke is pretty good.
    Listening is the act of aural discrimination and dissemination of sound, and accepting you get it wrong sometimes.

    Analog Inputs:
    Pro-Ject Signature 10 TT & arm
    Benz Micro LP-S, Michel Cusis MC, Goldring 2500 and Ortofon Rondo Blue cartridges
    Hitachi FT5500 mk2 Tuner

    Digital:-
    Sony 3d blu-Ray for CDs to Caiman SEG
    RaspberryPi/HifiBerry Digi to Beresford Caiman SEG DAC
    Buffalo NAS Drive

    Amplification:-
    LFD MMC special phono stage & Rothwell MCX SUT
    ALLNIC T1500 MKII SET 300B amp
    Schiit MAGNI 3 Heresy amp

    Output:
    Wilson Benesch Vector speakers
    KLH Ultimate One Headphones

    Cables:
    Furutech AG-12-R4 High Performance Phono Cable
    Eccose Conductor CA1
    Belden 8402 with Switchcraft 3502A Audiophile High-End RCA
    Chord Epic speaker leads, & signature links


    I think I am nearing audio nirvana, but donít tell anyone.

  3. #3
    Join Date: Nov 2013

    Location: HAMPSTEAD

    Posts: 1,073
    I'm brian.

    Default

    That was a genius moment David !...again. There s a lovely review on the net about one guy who put 2 border patrol s P/S on his mono blocks for fantastic results.
    Been more than happy with my B/P, A/I 500 over the years though

  4. #4
    Join Date: Oct 2016

    Location: London

    Posts: 235
    I'm David.

    Default

    Quote Originally Posted by tapid View Post
    That was a genius moment David !...again. There s a lovely review on the net about one guy who put 2 border patrol s P/S on his mono blocks for fantastic results.
    Been more than happy with my B/P, A/I 500 over the years though
    Thanks Brian. I only wish I'd had an AI500 with Border Patrol power supply to do the a/b comparison but it does sound lovely this way, with much more tuneful bass and authority. Of course, this one's not in triode mode like yours either......

  5. #5
    Join Date: Nov 2008

    Location: North Down /Northern Ireland/ UK

    Posts: 19,500
    I'm Neil.

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    Lovely amp, I won't part with mine, even though I haven't used it in years.
    Regards Neil

  6. #6
    Join Date: Jan 2009

    Location: Essex

    Posts: 23,569
    I'm openingabottleofwine.

    Default

    Quote Originally Posted by AJSki2fly View Post
    I used to have a try-wired one with stepped volume pot and it sounded wonderful, I bet yours with the choke is pretty good.
    Did you use the AI 500 with the Impulse speakers you have for sale? A friend of mine uses that combination and very good it is too.
    Barry

  7. #7
    Join Date: Nov 2011

    Location: Seaton, Devon, UK

    Posts: 6,540
    I'm Adrian.

    Default

    Quote Originally Posted by Barry View Post
    Did you use the AI 500 with the Impulse speakers you have for sale? A friend of mine uses that combination and very good it is too.
    I had one from new which I purchased from the manufacturer in Brighton in 1989/90 and I had a pair of Snell Type J's with the extremely heavy 4 pillar stands(cannot remember the make), and it sounded great. For one reason and another I had a mental fit and sold it, which I deeply regretted for several years, then after a few years break from "HiFi" I purchased a 2nd hand one in about 2001, and used it with KEF Reference 3.2's, and it sounded great. Then I got seduced with Meridian gear and moved to a Series 500 setup with a 557 amp, it wasn't necessarily better but different.

    I am now back with valves but have move to 300B's.

    I expect the H2's with any good valve amplifier that has a reasonably good output control would work well with them, they are an exceptionally good horn design.
    Listening is the act of aural discrimination and dissemination of sound, and accepting you get it wrong sometimes.

    Analog Inputs:
    Pro-Ject Signature 10 TT & arm
    Benz Micro LP-S, Michel Cusis MC, Goldring 2500 and Ortofon Rondo Blue cartridges
    Hitachi FT5500 mk2 Tuner

    Digital:-
    Sony 3d blu-Ray for CDs to Caiman SEG
    RaspberryPi/HifiBerry Digi to Beresford Caiman SEG DAC
    Buffalo NAS Drive

    Amplification:-
    LFD MMC special phono stage & Rothwell MCX SUT
    ALLNIC T1500 MKII SET 300B amp
    Schiit MAGNI 3 Heresy amp

    Output:
    Wilson Benesch Vector speakers
    KLH Ultimate One Headphones

    Cables:
    Furutech AG-12-R4 High Performance Phono Cable
    Eccose Conductor CA1
    Belden 8402 with Switchcraft 3502A Audiophile High-End RCA
    Chord Epic speaker leads, & signature links


    I think I am nearing audio nirvana, but donít tell anyone.

  8. #8
    Join Date: Nov 2008

    Location: North Down /Northern Ireland/ UK

    Posts: 19,500
    I'm Neil.

    Default

    Quote Originally Posted by AJSki2fly View Post
    I had one from new which I purchased from the manufacturer in Brighton in 1989/90 and I had a pair of Snell Type J's with the extremely heavy 4 pillar stands(cannot remember the make), and it sounded great. For one reason and another I had a mental fit and sold it, which I deeply regretted for several years, then after a few years break from "HiFi" I purchased a 2nd hand one in about 2001, and used it with KEF Reference 3.2's, and it sounded great. Then I got seduced with Meridian gear and moved to a Series 500 setup with a 557 amp, it wasn't necessarily better but different.

    I am now back with valves but have move to 300B's.

    I expect the H2's with any good valve amplifier that has a reasonably good output control would work well with them, they are an exceptionally good horn design.
    Pirate Stands.

    I always thought the S500 with Impulse speakers sounded too bright and forward.
    Regards Neil

  9. #9
    Join Date: Nov 2011

    Location: Seaton, Devon, UK

    Posts: 6,540
    I'm Adrian.

    Default

    Quote Originally Posted by Spectral Morn View Post
    Pirate Stands.

    I always thought the S500 with Impulse speakers sounded too bright and forward.
    I can't comment on that as I have never heard a pair of H2's or any other Impulse speaker with Audio Innovations S500. The H2's are a great speaker and many people vouch for that, but like any other speaker the amp used with them will obviously effect the presentation. My H2's with the 300b's certainly do not sound bright or forward, but have a natural and broad soundstage.
    Listening is the act of aural discrimination and dissemination of sound, and accepting you get it wrong sometimes.

    Analog Inputs:
    Pro-Ject Signature 10 TT & arm
    Benz Micro LP-S, Michel Cusis MC, Goldring 2500 and Ortofon Rondo Blue cartridges
    Hitachi FT5500 mk2 Tuner

    Digital:-
    Sony 3d blu-Ray for CDs to Caiman SEG
    RaspberryPi/HifiBerry Digi to Beresford Caiman SEG DAC
    Buffalo NAS Drive

    Amplification:-
    LFD MMC special phono stage & Rothwell MCX SUT
    ALLNIC T1500 MKII SET 300B amp
    Schiit MAGNI 3 Heresy amp

    Output:
    Wilson Benesch Vector speakers
    KLH Ultimate One Headphones

    Cables:
    Furutech AG-12-R4 High Performance Phono Cable
    Eccose Conductor CA1
    Belden 8402 with Switchcraft 3502A Audiophile High-End RCA
    Chord Epic speaker leads, & signature links


    I think I am nearing audio nirvana, but donít tell anyone.

  10. #10
    Join Date: Aug 2018

    Location: London Knightsbridge

    Posts: 414
    I'm Nari.

    Default

    The stands for the J,s were likely to be pirates, or could be hoygans which were the same thing really.

    I had a pair of H2,s with the series 500 did not like it at all, I had a biamped 2nd audio set up with 1000 pre which sounded great. I had that with the Voyd Reference turntable, Cylene tonearm and audionote ioltd nice set up it was. I moved onto a pair of H1,S which seemed to work better with high powered amps I ended up with a EAR 549 and G88 set up should never have sold the G88 it was a lovely pre. The series 500 worked well with the snell e,s I once had. I ended up with every snell speaker at the time up to the mighty A 111.
    Most important and used Walker Black Diamond Etsuro Gold, Micro Seiki 8000mk2 Kondo special V12 Tiger Eye, Fidelity Research FR 66 Shindo spu, EMT 927, sme 312 aluminium. Fidelity research fr66, Sme 3012 mk1, Sme V, Ikeda 407 IT Sme Model 30/2/Dynavector 507 Kodo Beat Turntable Airtangent 10B modified Fidelity fr66s Etsuro Cartridge . Kondo Gakuoh Mk1 powers G70 Pre,Audio Tekne TFA-8695PCS pre Audio Tekne TEA 8695 Phono. Lfd Battery Phono Stage heavily custom rebuilt by Dr Richard Bews, Tharx Phono Stage. Lfd Master Dual Biamp power amp, Lfd Anniversary master preamp. Shindo Latour Field Coil. Rockport Cygnus Biamped, Voigt Domestic Corner Horns/ Feastex Fildcoils. LFD Custom silver Ribbons. LFD Diamond Vipor Mk2 interconnects, Lfd Golden Cobra interconnect. Koetsu blue lace mono special order, Koetsu burma jade mono special order.

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