#1
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Low level hum/buzz driving me CraZy!
Help guys! I have a low level hum/buzz coming through my speakers even without signal from source. When playing a cd, the hum does not vary with volume changes in music. I'm using CJ GAT with CJ LP140's. Thought it was the input/driver tubes in the amps, but replaced those today. Then replaced Telefunkens in the GAT with some Amperex & no change. Tried to make sure my power cables were spaced out about 4" from my interconnects or @ right angles to interconnects to no avail. Hmmm. Sound is fine as long as you crank it up over the annoying buzz which is easily heard 8' from my seating position. Certainly makes low level listening unenjoyable. Have been too busy to order new input/driver tubes for amps over last couple of months, but I don't recall the buzz being this loud.
Verity Audio Amadis speakers are 93db sensitive @ 8ohms. I have a new Ayon CD 3-sx red book CD player in for demo for the next 15 days. Guess I should have made sure all my tube (or other issues...damn) were worked out prior to having a demo unit shipped in. Any thoughts fellas? I'll be calling CJ tomorrow as well. I guess this is some sort of EFI/ground loop issue. Thanks, John position_51947
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conrad-johnson GAT, conrad-johnson LP140 monoblocks, McCormack SST-1 transport, SMc Audio Ultra DAC, Dynaudio Consequence C-1 mkii, Magnan Signature IC, Digital & speaker cables, Acoustic Zen Absolute Copper IC, Harmonic Technology Magic Link II IC, Timbernation custom audio rack with solid 3" walnut shelves |
#2
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Are you sure it is not a ground loop issue?
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#3
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I'm not suggesting this as a permanent solution, but to troubleshoot you might want to try floating the ground on your mono amps by using cheater plugs. If that eliminates the buzz you will have confirmed that you have a ground loop issue and can then determine the best way to address it with help from CJ.
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#4
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Thanks for response and link on cheater plugs.
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conrad-johnson GAT, conrad-johnson LP140 monoblocks, McCormack SST-1 transport, SMc Audio Ultra DAC, Dynaudio Consequence C-1 mkii, Magnan Signature IC, Digital & speaker cables, Acoustic Zen Absolute Copper IC, Harmonic Technology Magic Link II IC, Timbernation custom audio rack with solid 3" walnut shelves |
#5
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Without signal, but other components still connected?
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#6
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yes everything connected.
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conrad-johnson GAT, conrad-johnson LP140 monoblocks, McCormack SST-1 transport, SMc Audio Ultra DAC, Dynaudio Consequence C-1 mkii, Magnan Signature IC, Digital & speaker cables, Acoustic Zen Absolute Copper IC, Harmonic Technology Magic Link II IC, Timbernation custom audio rack with solid 3" walnut shelves |
#7
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Disconnect preamp interconnects from amp and see if it still hums or not.
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#8
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Quote:
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conrad-johnson GAT, conrad-johnson LP140 monoblocks, McCormack SST-1 transport, SMc Audio Ultra DAC, Dynaudio Consequence C-1 mkii, Magnan Signature IC, Digital & speaker cables, Acoustic Zen Absolute Copper IC, Harmonic Technology Magic Link II IC, Timbernation custom audio rack with solid 3" walnut shelves |
#9
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Amps on only connected to speakers.
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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 |
#10
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Thanks Ivan. How do you think the AMR cd77 would compare to this Ayon cd3-sx I'm demoing? Do you still sell the AMR players?
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conrad-johnson GAT, conrad-johnson LP140 monoblocks, McCormack SST-1 transport, SMc Audio Ultra DAC, Dynaudio Consequence C-1 mkii, Magnan Signature IC, Digital & speaker cables, Acoustic Zen Absolute Copper IC, Harmonic Technology Magic Link II IC, Timbernation custom audio rack with solid 3" walnut shelves |
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