Previous Thread
Next Thread
Print Thread
Rate Thread
Page 1 of 2 1 2
Active Auto On/Off on EP175
#204678 04/18/08 08:57 PM
Joined: Dec 2007
Posts: 12
K
kazkru Offline OP
frequent flier
OP Offline
frequent flier
K
Joined: Dec 2007
Posts: 12
I recently purchased an EP175. For whatever reason I can't get the Active Auto On/Off feature to automatically shut the amp off after a period of time with no signal from the amp. I'm using the high level imputs, and wonder if the auto on/off feature will not work when using these. Even with the amp off for several hours, there is still a quiet humm from the amp and it is not shutting off.

Any help understanding what is wrong would be appreciated.

Thanks,

Kaz

Re: Active Auto On/Off on EP175
kazkru #204679 04/18/08 09:01 PM
Joined: May 2003
Posts: 18,044
shareholder in the making
Offline
shareholder in the making
Joined: May 2003
Posts: 18,044
I believe it will not work with the high level inputs, but I am not certain. Worth giving Axiom a call.


I am the Doctor, and THIS... is my SPOON!
Re: Active Auto On/Off on EP175
Ken.C #204682 04/18/08 09:10 PM
Joined: Jan 2004
Posts: 13,840
Likes: 13
shareholder in the making
Offline
shareholder in the making
Joined: Jan 2004
Posts: 13,840
Likes: 13
Are you using high level inputs because your receiver does not allow for using a coax sub cable?


M80s VP180 4xM22ow 4xM3ic EP600 2xEP350
AnthemAVM60 Outlaw7700 EmoA500 Epson5040UB FluanceRT85


Re: Active Auto On/Off on EP175
SirQuack #204683 04/18/08 09:12 PM
Joined: Dec 2007
Posts: 12
K
kazkru Offline OP
frequent flier
OP Offline
frequent flier
K
Joined: Dec 2007
Posts: 12
 Originally Posted By: sirquack
Are you using high level inputs because your receiver does not allow for using a coax sub cable?


Yes

Re: Active Auto On/Off on EP175
kazkru #204720 04/19/08 02:23 AM
Joined: May 2002
Posts: 10,654
shareholder in the making
Offline
shareholder in the making
Joined: May 2002
Posts: 10,654
Kaz, the use of the high level inputs should make no difference in this matter, since if there's no input there's no input, and the amp should shut off after the designed time regardless of what connection is used. You might contact Axiom directly on the possibility that the shut-off circuit on your particular EP175 isn't adjusted correctly.


-----------------------------------

Enjoy the music, not the equipment.


Re: Active Auto On/Off on EP175
kazkru #204873 04/20/08 07:49 PM
Joined: Jan 2002
Posts: 3,270
connoisseur
Offline
connoisseur
Joined: Jan 2002
Posts: 3,270
Hello Kaz,

Your remark that there is a "quiet hum" present when the EP175 has not shut off suggests to me that you have a ground loop hum. The EP175 would perceive this as a signal input even if your main AV receiver or amplifier is shut off. Ground loop hum can exist even if all the other components in your system are turned off. Check the cable-TV input. It's usually the source. Disconnect it where it enters your cable/converter box. If the quiet hum disappears, then you'll need an isolating transformer available from Axiom or (rarely) from your TV cable provider.

Try our trouble-shooting steps to getting rid of the ground loop hum (in the Articles Archive) and it should solve the problem of the sub not turning off.

As JohnK pointed out, the auto circuit operation is not dependent on using the low-level or high-level inputs.

Regards,

Alan


Alan Lofft,
Axiom Resident Expert (Retired)
Re: Active Auto On/Off on EP175
alan #204876 04/20/08 08:05 PM
Joined: Aug 2007
Posts: 3,488
Likes: 9
connoisseur
Offline
connoisseur
Joined: Aug 2007
Posts: 3,488
Likes: 9
Good one Alan! I can't believe none of us picked up on that "quiet hum"! This makes a lot more sense. \:\)


See Mojo's signature
Re: Active Auto On/Off on EP175
alan #204987 04/21/08 07:37 PM
Joined: Dec 2007
Posts: 12
K
kazkru Offline OP
frequent flier
OP Offline
frequent flier
K
Joined: Dec 2007
Posts: 12
 Originally Posted By: alan
Hello Kaz,

Your remark that there is a "quiet hum" present when the EP175 has not shut off suggests to me that you have a ground loop hum. The EP175 would perceive this as a signal input even if your main AV receiver or amplifier is shut off. Ground loop hum can exist even if all the other components in your system are turned off. Check the cable-TV input. It's usually the source. Disconnect it where it enters your cable/converter box. If the quiet hum disappears, then you'll need an isolating transformer available from Axiom or (rarely) from your TV cable provider.

Try our trouble-shooting steps to getting rid of the ground loop hum (in the Articles Archive) and it should solve the problem of the sub not turning off.

As JohnK pointed out, the auto circuit operation is not dependent on using the low-level or high-level inputs.

Regards,

Alan


Thanks for the reply, Alan. Your suggestion makes a lot of sense, however there is one problem.....it's used for stereo only, so no TV coax cable is hooked into the amp.

The only thing I can think of is that the amp is a tube amp which I'm wondering might have something to do with it. However, I would guess that whether it's a tube amp or solid state/transistor amp, when they're off, they're off, and there would be no signal either way. Might it be possible the tube amp, even when turned off, is somehow still leaking a tiny bit of juice through the speaker outputs?

I'm at work now, but when I get home tonight I will try experiment a little by unplugging the amp completely. I'll also go check out the troubleshooting article you recommended as well.

Thanks again.

Kaz


ps. thanks to all the others for their responses also.

Last edited by kazkru; 04/21/08 07:38 PM.
Re: Active Auto On/Off on EP175
kazkru #205018 04/21/08 09:29 PM
Joined: Jan 2007
Posts: 10,490
Likes: 116
M
shareholder in the making
Offline
shareholder in the making
M
Joined: Jan 2007
Posts: 10,490
Likes: 116
Kaz,

It doesn't matter if your cable isn't hooked up to your amp. Take it from me. I was in the same spot as you. I coerced the cable company to come and install an isolator at the entrance and that took care of all my problems. It has to do with the way the cable company grounds the incoming cable.


House of the Rising Sone
Out in the mid or far field
Dedicated mid-woofers are over-rated
Re: Active Auto On/Off on EP175
kazkru #205043 04/22/08 02:37 AM
Joined: May 2002
Posts: 10,654
shareholder in the making
Offline
shareholder in the making
Joined: May 2002
Posts: 10,654
Kaz, as you described the situation, it would appear to be less likely to involve a ground loop. You say that the quiet hum is coming from the sub amp(not the driver cone). This would be more likely to indicate a mechanical hum from the sub amp transformer windings(nothing very unusual or to be concerned about as such)rather than an electrical hum caused by a ground loop, coming from the driver cone. If there was a strong enough ground loop current to keep the sub amp "awake", it'd be likely that you wouldn't be asking about a slight hum from the amp which was supposed to be off, but rather a loud hum coming from the cone when the sub was on and playing.


-----------------------------------

Enjoy the music, not the equipment.


Page 1 of 2 1 2

Moderated by  alan, Amie, Andrew, axiomadmin, Brent, Debbie, Ian, Jc 

Link Copied to Clipboard

Need Help Graphic

Forum Statistics
Forums16
Topics24,940
Posts442,457
Members15,616
Most Online2,082
Jan 22nd, 2020
Top Posters
Ken.C 18,044
pmbuko 16,441
SirQuack 13,840
CV 12,077
MarkSJohnson 11,458
Who's Online Now
0 members (), 145 guests, and 4 robots.
Key: Admin, Global Mod, Mod
Newsletter Signup
Powered by UBB.threads™ PHP Forum Software 7.7.4