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JL Audio Ahead of the Curve

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  #1  
Old 04-24-2017, 02:54 PM
BlueSky BlueSky is offline
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Default F212 Transformer Hum - Problem solved.

Ever since getting my F212, I've been plagued with audible 60 Hz. hum coming from the F212's internal toroidal power transformer. The hum was elusive and would come and go without warning. Sometimes the hum was persistent for many minutes at a time. At other times, it was cyclical and would come and go with a periodicity of a three or four seconds between peaks and valleys. I reached out to several people who said it could be dimmers installed on the lighting or that it could be D.C. riding on the A.C. line. Disconnecting the dimmers didn't help and selectively powering down various circuits at the breaker panel didn't help. I also ran separate 10 AWG feeds from the breaker panel to the sub. I even tried both sides of the A.C. line to no avail. Heck, I even invested in a toroidal isolation transformer only to find the isolation transformer itself hummed quiet loudly.

At my wits end, I decided to invest in a little $100 device known as the Emotiva CMX-2 AC Line Restoration and Common Mode Filter. I also investigated a PS audio device that I found info on only to find that it was no longer being manufactured. The CMX-2 arrived several days ago and appeared to be a well-built and solid unit. To my utter surprise the problem has been resolved! The F212 is dead quiet even with my ear pressed against the cabinet of the sub! I can highly recommend this little gadget if you suspect you may be fighting D.C. riding on your A.C. line.
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  #2  
Old 04-24-2017, 03:34 PM
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jdandy jdandy is offline
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Joe.......This is good news. Thanks for letting everyone know about the Emotive CMX-2 AC Line Restoration and Common Mode Filter. Retail $119 isn't bad if it solves issues like yours.









>Precision DC offset eliminator.

>High-quality common mode and differential mode L-C noise filtering.

>Continuous line-status monitoring - provides continuous real-time indicators that show the status of Hot, Neutral, and Ground lines.

>Power Direct Connect™ mounting system, which connects the outlets directly to the circuit board.

>Premium high-quality components and a heavy-duty double sided FR4 circuit board with high current paths on both sides.

>Two commercial grade AC outlets.

>Detachable IEC high current, 14 gauge, 2 meter power cord included.

>High reliability resettable magnetic circuit breaker.

>Constructed from machined aluminum.

>Can be mounted vertically or horizontally.
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Last edited by jdandy; 04-24-2017 at 03:39 PM.
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  #3  
Old 04-24-2017, 05:02 PM
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Joe thanks, my 212 has some hum too, I have tried ground lifts and even a Furman outlet strip higher end unit and even all of that into my PS Audio conditioner, WW silver cable no help

I will order one of this asap and keep you and the thread posted.

PS Thanks so much, this will be a game changer.

My 212 even seems to add some noise when I use my MX150 but not when I am in pure 2ch mode on my C500 rig. For some reason my MX 150 even though on the same circuit as the C500 and both these even on a diff breaker and a diff PS Audio conditioner have given me fits. Sounds like your issues in similarity.

I did run another dedicated 120 circuit and another 20 amp breaker, got rid of light dimmers etc went all LED nothing and I mean nothing has helped.

When the audio system is off I power of the power to the 212 to keep it out of the loop and then even pull the power cord uggg....

Again Thanks Joe

WOW I sure hope this helps!

Can you tell me where to order at? Amazon 2-4 weeks I want it yesterday!
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Old 04-24-2017, 05:27 PM
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Quote:
Originally Posted by djwhog View Post
Joe thanks, my 212 has some hum too, I have tried ground lifts and even a Furman outlet strip higher end unit and even all of that into my PS Audio conditioner, WW silver cable no help

I will order one of this asap and keep you and the thread posted.

PS Thanks so much, this will be a game changer.

My 212 even seems to add some noise when I use my MX150 but not when I am in pure 2ch mode on my C500 rig. For some reason my MX 150 even though on the same circuit as the C500 and both these even on a diff breaker and a diff PS Audio conditioner have given me fits. Sounds like your issues in similarity.

I did run another dedicated 120 circuit and another 20 amp breaker, got rid of light dimmers etc went all LED nothing and I mean nothing has helped.

When the audio system is off I power of the power to the 212 to keep it out of the loop and then even pull the power cord uggg....

Again Thanks Joe

WOW I sure hope this helps!

Can you tell me where to order at? Amazon 2-4 weeks I want it yesterday!
I stock them!
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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
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Old 04-24-2017, 05:15 PM
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Order update, OK I ordered direct from manufacture, nothing else has helped so hope this does not sure if it will be here this week or next?

But with the new Oppo 205 on the way Wed I use it running the MX150 so I really want this hum gone.

All my other items not to hi-jack this thread helped maybe 10-20 percent each, but hum is still bad enough it is annoying and I love the F212 so i sure hope like help this does the trick. For $119 I think it is cheap investment relative to everything I have into the system, yet alone the F212.
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Old 05-17-2017, 08:21 PM
BlueSky BlueSky is offline
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Quote:
Originally Posted by djwhog View Post
Order update, OK I ordered direct from manufacture, nothing else has helped so hope this does not sure if it will be here this week or next?

And the verdict is.........?
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Old 04-24-2017, 05:37 PM
Garytn Garytn is offline
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That's a great find and great that it has worked. I'm considering a JL sub. Is this hum a common issue?
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Old 04-24-2017, 05:39 PM
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Quote:
Originally Posted by Garytn View Post
That's a great find and great that it has worked. I'm considering a JL sub. Is this hum a common issue?
Not at all; I have about 10 pairs of subs, zero hum.
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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
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Old 04-24-2017, 05:50 PM
Garytn Garytn is offline
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Good! Thanks.
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Wilson Sasha 1
Digital Sources:
Ayre QX-5 Music Hub/ DAC
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Turntable:
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12” Brinkmann arm w/ Lyra Delos
Cables:
Cardas Clear
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Old 04-24-2017, 06:51 PM
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djwhog djwhog is offline
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Ivan wish I knew this I would have ordered direct from you Sorry... I ordered from company direct
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