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#99147 - 01/23/21 11:56 AM Amplifier Hum
Phil Gilbert, Jr. Offline
Deputy Gunslinger

Registered: 06/04/09
Posts: 5
Loc: New York, NY
My 5000 has recently been exhibiting a low hum that is especially noticeable when the system is powered off and the amplifier is in standby mode. The amp is connected to a Model 976 and power is triggered from the pre.

The hum sounds like a 60-cycle hum but the power cord does not include a ground pin, so attempting to isolate the ground is not possible.

Thoughts? Anyone else seen this?
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[5.1ch]
Outlaw Model 976
Outlaw Model 5000
SVS Speakers
SVS Sub

[2ch]
McIntosh C2500
McIntosh MC162
Sonus Faber Bookshelfs

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#99148 - 01/23/21 09:33 PM Re: Amplifier Hum [Re: Phil Gilbert, Jr.]
butchgo Offline
Desperado

Registered: 06/22/07
Posts: 369
Loc: Southern Oregon coast
I had that problem with my 7500 and it was caused by dirty AC power.
I thought it was a ground loop problem so I tried the cheater plug but no difference.
I bought a Channel Islands AC filter and all of the problems went away.
Not sure if they still make them but Emotiva makes the CMX-2 that should do the same thing.
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Epson 3500 3D projector
93" Carl's Place Flexiwhite DIY screen
Outlaw 976 Pre/Pro
Outlaw 7500 for LCR & L/R surrounds
1- Emotiva Mini X-A100 for rear surrounds
2- Outlaw LFM-1 EX subs
Oppo BDP-105 Blu-ray/DVD/SACD player
Outlaw LCR (Snell Labs) for center channel duty
Tekton Lore monitors L/R
4- Emotiva ERD-1s surround speakers
Monster HTS3600MKII power center

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#99150 - 01/24/21 02:27 PM Re: Amplifier Hum [Re: butchgo]
Phil Gilbert, Jr. Offline
Deputy Gunslinger

Registered: 06/04/09
Posts: 5
Loc: New York, NY
I will check those out. Thanks!
_________________________

[5.1ch]
Outlaw Model 976
Outlaw Model 5000
SVS Speakers
SVS Sub

[2ch]
McIntosh C2500
McIntosh MC162
Sonus Faber Bookshelfs

Top

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