Active sub won't switch from stand-by to active - AVS Forum
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post #1 of 10 Old 07-09-2014, 04:32 PM - Thread Starter
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Active sub won't switch from stand-by to active

Hi,


I have a Pioneer s-21w at the moment, been using it in combination with a Sony STR-DH540 for a while now without any issues.
However, today the sub wouldn't go from stand-by to active when there was a signal (wii U for example).


What could be the issue? Is there something wrong with the sub or could it be the receiver?


If it's the sub: I had my eye on the Pioneer s-51w, would it be an upgrade?


Thanks!
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post #2 of 10 Old 07-09-2014, 04:45 PM
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Quote:
Originally Posted by Freditor View Post
Hi,


I have a Pioneer s-21w at the moment, been using it in combination with a Sony STR-DH540 for a while now without any issues.
However, today the sub wouldn't go from stand-by to active when there was a signal (wii U for example).


What could be the issue? Is there something wrong with the sub or could it be the receiver?


If it's the sub: I had my eye on the Pioneer s-51w, would it be an upgrade?


Thanks!
Eliminate the easy variables first.

1)Double check the settings upstream from the sub to be sure it is receiving a signal. Sometimes these settings can reset just due to a power outage.

2)Be sure the subwoofer cable is still plugged into the appropriate jacks

3)You can also power off the sub(and the rest of the system) and unplug the sub cable from the preamp/receiver. Then turn the sub back on and wait for it to go into standby if needed(sometimes just turning the sub on will "wake up" a stand by mode). Once in standby, touch the end of the RCA/sub cable for a second. This should wake up the sub. If it doesn't it indicates the issue may be inside the sub amp.

Tom V.
Power Sound Audio
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post #3 of 10 Old 07-09-2014, 05:15 PM
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One more easy variable: check if your receiver somehow got switched to direct audio mode (assuming that's an option) this would bypass all other circuitry to send the most pure signal to your speakers; unfortunately it bypasses the sub as well.
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post #4 of 10 Old 07-09-2014, 05:22 PM
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Increase the signal from the receiver to the sub. You may need to turn down the gain on the sub to compensate.

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http://www.avsforum.com/t/1475769/de...ently-authored 

Did you really need to quote that entire post in your reply?
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post #5 of 10 Old 07-10-2014, 01:22 AM - Thread Starter
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Thanks for all the replies!

Did all of the aforementioned but alas... with no success.

Could the sub be busted? As for the other question: would the s-51w be an upgrade?

Here's a comparison:

http://www.pioneer.eu/nl/products/42...05&__P31=48335
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post #6 of 10 Old 07-10-2014, 07:50 AM
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Quote:
Originally Posted by Freditor View Post
Thanks for all the replies!

Did all of the aforementioned but alas... with no success.

Could the sub be busted? As for the other question: would the s-51w be an upgrade?

Here's a comparison:

http://www.pioneer.eu/nl/products/42...05&__P31=48335
Subs with auto standby switches may have risk of having this problem after long period of use. Try blasting some high bass music everyday for few hours, and see if the sub 'wakes up' eventually.

If not, send to a shop to look at the parts on the auto standby circuit to look for 'wear & tear'. One good thing is that your amp still has the light, and this means that your amp is still functional and didnt kapuut.
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post #7 of 10 Old 07-10-2014, 07:52 AM
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Quote:
Originally Posted by Freditor View Post
Thanks for all the replies!

Did all of the aforementioned but alas... with no success.

Could the sub be busted? As for the other question: would the s-51w be an upgrade?

Here's a comparison:

http://www.pioneer.eu/nl/products/42...05&__P31=48335
Does the subwoofer have any type of power LED that illuminates when it is "on"?

You touched the open end of the cable and the made no noise? Try a different cable---any rca to rca cable you have laying around is fine for this temporary check. If you still get no noise from the sub, check any user serviceable fuses.

If...

1)sub is getting AC power
2)all user serviceable fuses are good
3)gain on sub is set correctly
4)You touching the open end of a cable connected to the sub produces no noise
5)You try a second cable with same results

Then...

I'd say it is safe to assume the subwoofer has an internal problem.


EDIT---I believe you'll find the s51w to be a better performer just based on the spec sheet you provided. Are you in the states? I ask because you may find something in the $100-200 range from parts express too.

Tom V.
Power Sound Audio

Last edited by Tom Vodhanel; 07-10-2014 at 07:58 AM.
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post #8 of 10 Old 07-10-2014, 07:56 AM
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Does the sub work with "auto standby" set to off?

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http://www.avsforum.com/t/1475769/de...ently-authored 

Did you really need to quote that entire post in your reply?
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post #9 of 10 Old 07-11-2014, 04:13 PM
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Why are you posting the same thread in different areas?

If it's not a BIG screen, it's not a theater...
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post #10 of 10 Old 07-11-2014, 04:20 PM
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Because he just joined and isn't aware of the proper etiquette yet.
Hopefully, something in either of the threads has helped.

Downloadable FREE demo discs:
http://www.avsforum.com/t/1475769/de...ently-authored 

Did you really need to quote that entire post in your reply?
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