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Power Conditioners Voltage regulation to AC Regeneration |
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Thread Tools | Display Modes |
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DC Offset, and Dimmer switches with LED lights.
My MC has a hum, a hum caused by DC offset. I had an electrician come by as a recommendation from MC to troubleshoot the amp humming. While there may be a quiet hiss coming from the speakers, I can hear some noise generated by the amp itself. That noise is allegedly caused by DC power on an AC line. DC doesn't belong on an AC line, and it baffles an electrician because it's not supposed to happen. That's not the way electricity works. Anyway after convincing the electrician to put his multimeter on and check, we find DC on the AC line. It almost doesn't matter because we can't locate it's source. It could be anything in the whole home.
Anyway I got some new expensive high CRI LED lights. They hum loud. I swap my old dimmer switches for the LED compatible dimmer switches and it's just as loud. We tested them all for DC offset. Sure enough ALL old style and ALL new LED/CFL style dimmers all have some DC offset when tested with a multimeter. I even tested multiple brands. LED hum went away with the DC offset when I scrapped the dimmers for a standard switch. Now that I know every dimmer is a source for DC offset, I'll be pulling dimmer switches from my entire home. I yanked out 5 already, and that's just the kitchen and halls. Next stop is the listening/movie room. Anyone know of a dimmer switch guaranteed not to have a DC offset and noise? I liked having a dimmer. |
#2
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Emotiva makes a unit that effectively removes all DC voltage from the AC line.
https://www.amazon.com/Emotiva-CMX-2...aui_i_r_o0_img
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Ivan FLORIDA MX136, MC1.2KW(10) MC2KW(2), MCD1100, MS750(2) MVP881, C1000C/P/T, MPC1500, HT-2 SUBS(2) HT3F(2) WS350(2) XRT2K, XCS2K, XR27(2) XCS350(2) JL GOTHAM v2 SUBS(2) SILENZIO MUSIC SERVER, LUMAGEN RADIANCE SCALER, SONY VPH-G90U 4K PROJECTOR, STEWART 120" MOTORIZED SCREEN, CINEMA-TECH SEATING, WW PLATINUM CABLES Reference System: ACCUPHASE A300 AMPS, C3900 PRE-AMP, DP1000 CD/SACD TRANSPORT, DC1000 DIGITAL PROCESSOR, DG-68 DIGITAL EQUALIZER, T1200 FM STEREO TUNER, PS1230 POWER SUPPLY, HRS-SXR CUSTOM RACK w/ M3X SHELVES, TAD REFERENCE ONE MK2 LOUDSPEAKERS, WW PLATINUM CABLES CAPE COD MX150, MC501(2) MC1.2KW(10) MC2301(2) MR88, MVP881, MCD1100, MDA1000, C1000C/P/T, MPC1500, ESOTERIC K-01X 30th ANNIVERSARY (BLACK) SACD/CD PLAYER, G02-X CLOCK, HT3F(2) XRT2K, XCS2K, XR27(2) JL GOTHAM v2 SUBS(2) JL FATHOM F113v2 SUBS(4) SOUND ANCHOR STANDS(2) KALEIDESCAPE STRATO & TERRA SERVERS 80-TB, LUMAGEN RADIANCE SCALER, SONY VPH-G90U 4K PROJECTOR, STEWART 120" SCREEN, SONUS FABER STRADIVARI, SILENZIO MUSIC SERVER, FORTRESS SEATING, WW PLATINUM CABLES Analog Rig: CLEARAUDIO INNOVATION WOOD, UNIVERSAL ARM w/ Da VINCI' CART, 2nd UNIVERSAL ARM w/ GOLDFINGER STATEMENT CART, HRS-MXR REFERENCE RACK-GLOSS BLACK w/ M3X SHELVES, AESTHETIX RHEA SIG PHONO-PRE, BRYSTON BHA-1 HEADPHONE AMP, WW PLATINUM CABLES Reference System: BURMESTER 911MK3 AMP(3), 088 PRE-AMP, 089 CD PLAYER, 100 PHONO PRE-AMP, 948 POWER CONDITIONER, ACCUPHASE DG-68 VOICING EQUALIZER, AVID ACUTUS REFERENCE SP TT, GRAHAM PHANTOM II SUPREME ARM, BENZ MICRO LP-S CART, GRANDIOSO P1X/D1X STACK, G1X RUBIDIUM MASTER CLOCK, N05 NETWORK PLAYER, SILENZIO MUSIC SERVER, HRS-SXR CUSTOM RACK w/ M3X SHELVES, SONUS FABER AIDA SPEAKERS, JL FATHOM F113v2 SUBS(2) SOUND ANCHOR STANDS(2) WW PLATINUM CABLES Library System: GRANDIOSO M1 MONOBLOCK AMPS, C1 LINESTAGE PRE-AMP, K1X CD/SACD PLAYER, G1 MASTER RUBIDIUM CLOCK, E02 PHONO-PRE, SILENZIO MUSIC SERVER, AERIAL ACOUSTICS 20T V2, AERIAL SW12 SUBS(2), CANTON REF K1’s, VPI HRX TT w/ SDS POWER SUPPLY, ORTOFON CADENZA BLACK CART, KLAUDIO RCM, SHUNYATA DENALI 6000/S v2, SHUNYATA OMEGA QR’s, WW PLATINUM CABLES Esoteric/Bryston System: ESOTERIC C02-X PRE-AMP, P-02X TRANSPORT, D02-X DAC, G02-X CLOCK, BRYSTON 28B3 CUBED MONOBLOCK AMPS(4), BRYSTON BHA-1 HEADPHONE AMP, SHUNYATA DENALI 6000/S v2(2) EVEREST 8000 POWER CONDITIONER(2) ALTAIRA CG & SG HUBS, AMR-DP777-SE DAC, SILENZIO MUSIC SERVER, TAD REFERENCE ONE MK2 LOUDSPEAKERS, QUADRASPIRE RACK, WW PLATINUM CABLES Accuphase/Canton System: ACCUPHASE E800 INTEGRATED, DP570 CD/SACD PLAYER, T1200 FM STEREO TUNER, DG-68 VOICING EQUALIZER, PS530 POWER SUPPLY, CANTON REF K3’s, CANTON REF K5’s, SILENZIO MUSIC SERVER, HRS MXR REFERENCE MAHOGHANY RACK w/ M3X2 SHELVES, WW GOLD CABLES |
#3
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#4
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Not only dimmers, some appliances using half-wave rectification cause DC problems too.
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#5
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I'm disappointed that my evo3 sigmas doesn't filter it for me, but I'll be sure my next power filter tackles DC. The Emotiva model is cheap enough for proof of concept. |
#6
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Is dc a factor if your using a p10?
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#7
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DC Offset, and Dimmer switches with LED lights.
According to the podcast, they filter DC in all their regenerators. Last edited by kubla36; 09-21-2018 at 09:12 PM. |
#8
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Thanks
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#9
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I have about 10 Lutron Casetas and have zero humming from any of my LEDs which are basically 100% of my house, and neither of my 2 amps, including 1 MA252, which has zero power conditioning and a stock cord right now, dead silent. They're not cheap, about 60 dollars a piece. Maybe these will help?
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Living Room Audio research LS28SE preamplifier, Aurender N10 Streamer, Topping D90 DAC, McIntosh MC462 amplifier. Focal Sopra 3 speakers. Salamander Archetype rack, Symposium Acoustics Segue shelves, Silver Eclipse 7 XLRs, Shunyata Everest power conditioner, Alpha V2, Delta V2 and Venom V2 10/12 power cords, and Audioquest Oak speaker cables. GIK Acoustic's bass soffits and 244 bass trap Art panels room treatments. Sony XBR75X900e 4K TV and Sony UBP-X800 Blu-ray player |
#10
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