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post #1 of 21 Old 08-07-2012, 10:24 AM - Thread Starter
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I have a definitive technology pro 1000 and just now i was running my receivers test tone and the subs volume has a sustaining level of output. I've never experienced this before. I haven't used my system in weeks and was making sure all levels were still correct before watching a movie and this happens.

Turning the receivers channel level down does nothing. The output is reduced only a little and can still hear the droning bass. Turning down the level on the sub has the same effect. Did the amp go bad?

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post #2 of 21 Old 08-07-2012, 11:12 AM - Thread Starter
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I played some bass tones and i hear a rattling sound when i play a 30hz and below tones.

EDIT- Actually the rattling sound was another object close by. Nevermind.

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post #3 of 21 Old 08-07-2012, 12:40 PM - Thread Starter
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Nobody has any ideas why the sub playing at a such a high level? It's really confusing me. I haven't touched the sub in weeks.

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post #4 of 21 Old 08-07-2012, 02:38 PM
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Hello,

on which way you connected your amp with the subwoofer? Is is connected via dedicated subwoofer output of receiver towards the LFE input of subwoofer?

which receiver you are using?

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post #5 of 21 Old 08-07-2012, 04:42 PM - Thread Starter
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Quote:
Originally Posted by Poison Nuke View Post

Hello,
on which way you connected your amp with the subwoofer? Is is connected via dedicated subwoofer output of receiver towards the LFE input of subwoofer?
which receiver you are using?

Im using the LFE in on the subwoofer. It's a pioneer elite SC-37.

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post #6 of 21 Old 08-07-2012, 05:17 PM
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outch, a "litte" oversized receiver for the speakers.

as Im reading it, you play the test sound from the receiver and wonder why the signal isnt getting quieter while you decrease the sound volume of the subwoofer channel inside the receiver?
In which range you can adjust the channel level?

greetz

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post #7 of 21 Old 08-07-2012, 07:42 PM - Thread Starter
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Quote:
Originally Posted by Poison Nuke View Post

outch, a "litte" oversized receiver for the speakers.
as Im reading it, you play the test sound from the receiver and wonder why the signal isnt getting quieter while you decrease the sound volume of the subwoofer channel inside the receiver?
In which range you can adjust the channel level?

I didn't buy the SC-37 specifically for the def tech speakers i have now. I bought it for when i buy new speakers. I was actually going to wait until i got the speakers i wanted, but the SC's weren't going to be available for long.

Anyway, I don't how to really explain it. The subs volume is just too high. I had it calibrated to 78db and now its at 95db! I changed the trim levels the lowest it can go; -12db. And it's still has a high volume. I played frequency tones and the output is way high. So it's not just the receivers test tone. I really don't understand whats wrong.

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post #8 of 21 Old 08-07-2012, 08:30 PM
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try to disable EQ and the THX features if active. possibly there is an error occured in the configuration. Its not the first time I have level issues with enabled Audyssey for example.

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post #9 of 21 Old 08-07-2012, 09:27 PM - Thread Starter
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It's none of those things.

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post #10 of 21 Old 08-08-2012, 04:23 AM
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I think that you have already answered your own question ... BAD AMP!

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post #11 of 21 Old 08-08-2012, 08:01 AM - Thread Starter
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Quote:
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I think that you have already answered your own question ... BAD AMP!
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But what would make this happen? It was working the last time i watched a movie.

I was watching SW Episode 1. Don't tell me the pod racing scene destroyed my sub? It was fine while watching it.

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post #12 of 21 Old 08-08-2012, 08:19 AM
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While I agree it's probably the sub amp, have you tried running the sub with some other output, such as plugging an MP3 player into it, just to absolutely rule out the receiver as being the problem?

Your questions are answered:
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post #13 of 21 Old 08-08-2012, 09:56 AM - Thread Starter
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How do i do that? Never done that before.

EDIT- i just tried my onkyo 705 receiver and the output is high also.

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post #14 of 21 Old 08-08-2012, 10:23 AM
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Electronic components fail ... that's just life. Like a light bulb that came on the last time you threw the switch, but now it doesn't because it is burnt out. An uncontrollable amp is just as bad as one that won't come on at all ... you just have the benifit of hearing its difficulty. Accept that and move on to figuring out how to repair or replace it.


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post #15 of 21 Old 08-08-2012, 10:44 AM
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Quote:
Originally Posted by saprano View Post

How do i do that? Never done that before.
EDIT- i just tried my onkyo 705 receiver and the output is high also.

Yep. Then it's definitely the sub since you've used a different device and still have the problem.

As far as testing with an mp3 player, you can hook up an mp3 player directly to a sub using a 3.5mm to RCA adapter. But no need to do that now.

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post #16 of 21 Old 08-08-2012, 10:54 AM - Thread Starter
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So the amp is toast? Sigh.

Im getting a new SVS sub anyway but not right now. No $. I guess i'll have watch movies with the current sub for awhile.

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post #17 of 21 Old 08-08-2012, 05:37 PM
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hello,

dont know how it is called exactly in english, in car-hifi for example you have rca wires with integrated resistive voltage divider, which damps the signal level, to connect equipment with diffrent signal levels (like studio equip with +4dBr output on standard hifi gear with -10dBr input level). Didt cost that much and would be a good solution until new sub arrives.

greetz

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post #18 of 21 Old 08-11-2012, 05:20 PM - Thread Starter
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I'll look that up, thanks. Still don't get if the subs amp is damaged why is the output louder? Shouldn't it not work at all?

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post #19 of 21 Old 08-12-2012, 12:59 AM
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I think only the volume control is damaged, or has no conduct, so the volume isnt reduced now at all.
Maybe contact spray would help.

greetz

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post #20 of 21 Old 08-14-2012, 09:10 PM - Thread Starter
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Quote:
Originally Posted by Poison Nuke View Post

I think only the volume control is damaged, or has no conduct, so the volume isnt reduced now at all.
Maybe contact spray would help.

You would be correct.

Turning down the nob has no effect on the volume. But when i turn it up pass the 12:00 position it gets louder.

Contact spray?

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post #21 of 21 Old 08-15-2012, 08:56 AM
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Contact spray would certainly be worth a try.

Your questions are answered:
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