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Thread: Bumpy's system

  1. #1
    Join Date: Apr 2016

    Location: Bishops Stortford

    Posts: 507
    I'm Chris.

    Default Bumpy's system

    I have just nearly completed my ideal system with the installation of a pair of DRD 45 monoblocks from Ron Welborne. When I bought these, they were good but not great and had hum through the speakers that with time became increasingly invasive on the music.

    With any bit of DIY kit one is at the mercy of the builder in terms of quality and component decisions. So I handed the amps over to Slawa at SW1X to have checked over, the hum reduced, and any in particular make a start at introducing components that have better SQ.

    As expected Slawa breathed his magic into the amps. Out went the solid state power supply with horrible sounding ceramic capacitors and in came a valve based rectified power supply. Inadequate capacitance on the B+ was boosted with Audionote Kaisei capacitors. The well reviewed EML solid plate 45's were retained but a better driver valve was used to balance its modern sound. Its now a great performer. Other components were improved on.

    I will follow up with pictures of my other components soon.

    drd 45 improved_small.jpg
    Last edited by bumpy; 04-11-2016 at 11:17.

  2. #2
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 30,188
    I'm Geoff.

    Default

    I like the look of those Chris. Nice uncluttered appearance.
    Mr. Tact!

    "when common sense, logic and plausibility are ruled out. All that remain are lies and foolishness"


    Gear: MMs/ADCs/Low output MC's/One rare Japanese SUT/one scarce British phono stage/various tonearms/two hefty Japanese DD TT's/hefty Japanese BD TT/smaller Japanese BD TT and small British BD TT. One CD transport/3 CD players/2 jitter buster/2 DACs/Valve buffer. One MD deck. One tuner. Two TVC pre-amps/two valve pre-amps/solid state pre-amp/passive pre-amp. Current dumping power-amp or either of two Class A SS power-amp or Class A EL34 valve monos or big Japanese (part Class A) integrated. Big dual concentric speakers/Smaller dual concentric speakers/two way British compacts and full range speakers, amongst others. And too much more to list!

  3. #3
    Join Date: Apr 2016

    Location: Bishops Stortford

    Posts: 507
    I'm Chris.

    Default

    Quote Originally Posted by walpurgis View Post
    I like the look of those Chris. Nice uncluttered appearance.
    Ron Welborne gained a very polarised reputation. He was a great designer, working with Jack Elliano in the US to produce some very highly regarded products. But, his business acumen finally let him down with many unsatisfied customers. Jack Elliano has his own separate business.

    Looking inside the amps, there are a few obvious areas of cost cutting in components, but the basic design (priced for the DIY market) is good, and nothing a competent person like Slawa cant put right. Who knows what the future might hold for these amps, perhaps silver wiring, Black Gates throughout, and silver output transformers are available from Jack Elliano.

    I particularly like that the amps run nice and cool. It feels like the amps are coasting, but the sound suggests otherwise.
    Last edited by bumpy; 04-11-2016 at 11:25.

  4. #4
    Join Date: Apr 2012

    Location: Southall, West London

    Posts: 30,188
    I'm Geoff.

    Default

    Quote Originally Posted by bumpy View Post
    silver output transformers are available from Jack Elliano.
    Nice. But sounds like mega bucks though.
    Mr. Tact!

    "when common sense, logic and plausibility are ruled out. All that remain are lies and foolishness"


    Gear: MMs/ADCs/Low output MC's/One rare Japanese SUT/one scarce British phono stage/various tonearms/two hefty Japanese DD TT's/hefty Japanese BD TT/smaller Japanese BD TT and small British BD TT. One CD transport/3 CD players/2 jitter buster/2 DACs/Valve buffer. One MD deck. One tuner. Two TVC pre-amps/two valve pre-amps/solid state pre-amp/passive pre-amp. Current dumping power-amp or either of two Class A SS power-amp or Class A EL34 valve monos or big Japanese (part Class A) integrated. Big dual concentric speakers/Smaller dual concentric speakers/two way British compacts and full range speakers, amongst others. And too much more to list!

  5. #5
    Join Date: Apr 2016

    Location: Bishops Stortford

    Posts: 507
    I'm Chris.

    Default

    Quote Originally Posted by walpurgis View Post
    Nice. But sounds like mega bucks though.
    I know, It gets a bit frightening.

  6. #6
    Join Date: Apr 2016

    Location: Bishops Stortford

    Posts: 507
    I'm Chris.

    Default

    Music starts its travels from a 1TB external hard drive with its own power supply.

    This is connected via an unpowered USB cable to a Raspberry Pi 2 running Moode Audio software. The RPi is fitted with Wi Fi dongle to allow me to program the music from my seat using a Hudl 2.

    The RPi itself is powered by a Longdog linear power supply - a big step up from the switching power supply.

    Signal out is via USB to an SW1X USB Signature box and thence via phono interconnects to an SW1X DAC Signature. Both these SW1X boxes are pictured and are reviewed elsewhere. My feeling is that getting the signal from digital to analogue is one of the most important places to invest your money.
    Attached Images Attached Images
    Last edited by bumpy; 04-11-2016 at 13:42.

  7. #7
    Join Date: Apr 2016

    Location: Bishops Stortford

    Posts: 507
    I'm Chris.

    Default

    Today we have a look at the Open Baffle speakers. Vintage Alnico drivers throughout, Grundig tweeters, Greencone mids, and Altec subs. All silver wired with improved 1st order crossover components from SW1X including Black Gates and Audionote

    P1070317.jpg

    P1070326.jpg

    P1070329.jpg

    P1070327.jpg

    P1070328.jpg
    Last edited by bumpy; 24-11-2016 at 19:31.

  8. #8
    Join Date: Apr 2016

    Location: Bishops Stortford

    Posts: 507
    I'm Chris.


  9. #9
    Join Date: Aug 2009

    Location: Staffordshire, England

    Posts: 18,322
    I'm Martin.

    Default

    Have you not been tempted to go active with a digital crossover? You seem to have paid a lot of attention to detail with this set up so I guess you considered it.

    Very impressive set up btw
    Martin



    Current Lash Up:

    Sony X505ES CD Player * NVA P90SA passive pre / NVA A30 Power amp * JM Lab Electra 926 loudspeakers *



    "I hate to advocate drugs, alcohol, violence, or insanity to anyone, but they've always worked for me." - Hunter S Thompson

  10. #10
    Join Date: Feb 2013

    Location: W Lothian

    Posts: 38,590
    I'm Grant.

    Default

    look very nice... there were some grundig alnico tweeters like that on the bay earlier. seem nice magnet housings
    Regards,
    Grant ....

    I've said it before and I'll say it again: democracy simply-doesn't-work
    .... ..... ...... ...... ................... ..... ..... ..... ..... .....
    DENON DV2900 - TWIN PRO MONOBLOCK AMPLIFIERS - XIANG SHENG DAC\PRE\HEADPHONE AMP - AVANTREE OASIS CLASS 1 BLUETOOTH - AUDIO TECHNICA ATH-MSR7 & OPPO PM-3 PLANAR HEADPHONES - WIN10 JRIVER23, DEEZER HiFi - ECHO DOT - SMSL M6 MINIDAC - FULL RANGE TWIN TELEFUNKEN's - Q ACOUSTIC BT3 actives - CANTON SUB - MAINS REGENERATED.

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