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#1
09-22-2012, 10:36 PM
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Carnage - please look away
Just took delivery of the ref250 yesterday but something went horribly wrong by the end of the day :
  Fired up the monoblocks around 3pm. Let them workout for around 5 hours. Checked the bias & made adjustments around 8pm. Started to listen around 9pm. Just about to knockoff around 12 midnight & thought why not 1 more track. Towards the end of the track, a loud noise from the inside of the amp coupled with sparks ! Jumped out of my seat & rushed over to switch both amps off. One of the caps have completely dislodged from the PCB & must have bounced of the chassis (lucky chassis was in place) & landed upside down. What could have caused such a thing ? I only hope that it is a sub standard cap that died a premature death as the other caps still looks pretty normal upon visual inspection. My dealer is very apologetic. He will try to get things resolved while I hold his ref 210 on ransom. What do you think ? Regards, Joe Ling PS : The units sounded quite good out of the box.
__________________
Source 1 - Bergmann Sleipner + Benz Micro LP-S + ARC ref phono 10 (should have done this ages ago) Source 2 - Avid Acutus SP reference + Thales Reference tone arm + Benz Micro LPS (DS Audio Master 1 broken tip repaired but cost me USD2k. Still having issues - channel imbalance - back to dealer. However, channel issues not withstanding, sounded very very nice. Need to get it back soonest) Source 3 - DCS Vivaldi + Antelope reference clock or Cybershaft Op18 (not floating my boat so far) Source 5 - ROON ROCK with Aurender W20 as NAS & 2 units of SOTM switch with 10M input (the new frontier but still cannot beat CD for now) - ROON endpoint - Vivaldi upsampler Amplification - Naim Statement Speakers - ProAc Carbon 8 + JL FM113 x2 (replacement purchased - Stella Utopia EVO but due to lockdown, could be a year's wait) Purepower 2000 x 2 (&$@#% but sounds nice) Shunyata Denali X 2 
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#2
09-22-2012, 11:08 PM
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Sorry to hear. Total bummer to get your new toy in and it goes up in smoke. At least your dealer did the honorable thing!
__________________
Myles Astor, Senior Editor., Positive-Feedback.com, Goldmund Telos 300 amplifier, Goldmund Mimesis 37S Nextgen preamplifier, Doshi EVO phono and tape stages; Zellaton Plural EVO speakers; VPI Vanquish Turntable, VPI 12-inch Fat Boy gimbal arm and SAT LM-12 arm; Lyra Atlas SL Lambda, Fuuga mk.2, vdh Colibri Master Signature cartridges; Technics 1506/FM heads; Various cables including TA, MIT, Kubala-Sosna, Skogrand, Viero L3 Equilibrio speaker cables, Audience, SRA Craz 3 rack, Isobase and OHIO Class XL+2.1 platforms.
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#3
09-22-2012, 11:10 PM
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Apologies for my enjoyment of your Carnage, but I just love electronics in failure mode! I was an electronics tech ages ago but have not lost my fascination of electronics in failure mode!
Infant mortality most likely. (I hope it's not politically incorrect to say "infant mortality") ..but that's what we called it back in the day! one of Murphy's laws: a component, i.e resistor or capacitor, will always fail so to preserve the fuse. 
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#4
09-22-2012, 11:21 PM
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Joe,
I am glad it did not harm the speakers...... That is an amazing photo! Thanks for sharing and let us know what root problem was.
__________________
Audio Room: Sonus Faber Amati Faturas / JL Audio 13.5” Fanthom In Wall Subs / McIntosh C52 / McIntosh MCD 1100 / McIntosh MEN 220 / McIntosh MC 601’s / McIntosh MPC 1500 / McIntosh MT 5 / McIntosh MC 275’s / Luxman AS-55 Amp Selector / Silenzo (This thing is Amazing) / Gold Lion Tubes from Vintage Tube All items in green were bought thru the AA marketplace and blue from a current AA retailer
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#5
09-22-2012, 11:27 PM
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You more than likely had a tube go and it took out a resistor on the board. Sounds like a loud crack when the resistor blows. I had ARC Ref 610s and unfortunately things like that were happening all too often. That's the reason I'm no longer an owner of ARC electronics after 20 years.
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#8
09-22-2012, 11:38 PM
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Joe...it's good it did not take out anything else with it in the process. Hopefully, you will be presented with a pristine unit that has been fixed and you will have zero issues with it going forward. Everything I have read about the Ref 250s has been very positive. I hope you get to enjoy them again soon
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#9
09-22-2012, 11:48 PM
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Quote:
__________________
Dan  STUDIO - McIntosh C1000C/P, MC2301 (2), MR88, Aurender N10, Esoteric K-01X, Shunyata Sigma spdif digital cable, Sonos Connect, PurePower 2000, Stillpoints, Furutech Flux 50, Michell Gyro SE, Michell HR Power Supply, SME 309, Ortofon Cadenza Black, Wireworld, Sonus faber Amati Anniversario LIVING ROOM - McIntosh C2300, MC75 (2), MR85, Magnum Dynalab 205, Simaudio MOON Neo 260D-T, Schiit Audio Yggdrasil, Aurender N100H, Shunyata Sigma USB cable, Micro Seiki DD40, Ortofon Cadenza Blue, Nakamichi BX-300, Sony 60ES DAT, PS Audio P10, Furutech Flux 50, Sonos Connect, Stillpoints, Wireworld, Kimber, PMC EB1i, JL Audio f113 VINTAGE - McIntosh MA230, Tandberg 3011A tuner, Olive 04HD, Sony DTC-59ES DAT, McIntosh 4300V, JBL 4312A
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#10
09-23-2012, 12:24 AM
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Thanks guys. My only consolation is that my dealer is an understanding chap. His ref 210 has been on loan to me for more than 3 months & looks like will do more time in my listening room while he works out with factory what the problem is. Hopefully it's just the cap & nothing else. This looks like the main power smoothing section with many more bigger caps downstream (or upstream ? Can't tell). Well, the rest of the caps looks fine so I am hoping it's just the one cap.
Frank750, I have had the bias sense resistor fail in my ref 110 & yes it did make a loud noise. I don't think this is the case for my ref 250 though. Regards, Joe Ling
__________________
Source 1 - Bergmann Sleipner + Benz Micro LP-S + ARC ref phono 10 (should have done this ages ago) Source 2 - Avid Acutus SP reference + Thales Reference tone arm + Benz Micro LPS (DS Audio Master 1 broken tip repaired but cost me USD2k. Still having issues - channel imbalance - back to dealer. However, channel issues not withstanding, sounded very very nice. Need to get it back soonest) Source 3 - DCS Vivaldi + Antelope reference clock or Cybershaft Op18 (not floating my boat so far) Source 5 - ROON ROCK with Aurender W20 as NAS & 2 units of SOTM switch with 10M input (the new frontier but still cannot beat CD for now) - ROON endpoint - Vivaldi upsampler Amplification - Naim Statement Speakers - ProAc Carbon 8 + JL FM113 x2 (replacement purchased - Stella Utopia EVO but due to lockdown, could be a year's wait) Purepower 2000 x 2 (&$@#% but sounds nice) Shunyata Denali X 2
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