Go Back   TalkBass Forums > Bass Guitar Forums > Bass Guitar Forums > Amps [BG]
Register Rules/FAQ/CUP Members List Search Today's Posts Mark Forums Read



Supporting Membership
Thank You

Latest Supporting Member
Donate to Upgrade Today

Reply
 
Thread Tools Search this Thread
  #1  
Old 01-16-2013, 08:29 AM
Registered User
 
Join Date: Nov 2011
Location: Freiberg, Germany
amp sounds fuzzy - current circuit problem???

Hi guys,

I have a little problem with my amp (ashdown abm 500 evo iii). Actually, I think its more a problem with the current circuit in our rehearsal room, but I'll come to that later. The problem in the first place is that the amp sounds really really fuzzy. However, the DI-signal (pre-eq) sounds completely clean!... So I went to my local music store (with all my gear; ABM 410 and 115, effects pedals and bass) for several times and tried to show them the problem, but the amp always worked in the store. After I tried out some other locations (my apartment, e.g.) I'm pretty sure that there must be a problem with the power supply in our rehearsal room. The problem is not entirely new. It was the same with my ashdown mag c210 combo... Funny thing is, that it only appears during wintertime. Do you guys have any ideas about my problem?

I don't know if this is relevant for the whole "current circuit thing", but I'm from Germany.

I hope my english was good enough to give you an impression of my problem.

Best regards!
Martin
  #2  
Old 01-16-2013, 02:59 PM
Registered User
 
Join Date: Jul 2007
Location: Dallas, TX
Get an outlet tester, and see for yourself if the power is what it should be. If it is, are you sure it's not your spkrs?
__________________
edit signature
  #3  
Old 01-16-2013, 03:04 PM
Registered User

Use of this field for any other purpose is prohibited
 
Join Date: May 2006
Location: austin,tx
It's possible there may be a problem with grounding, corroded connections, low voltage, etc. in your rehearsal room if that's the only place you can make the problem happen. Could also be radio interference or something there.

Best to get the electrical wiring checked out as that's potentially not safe.


Tchuss.
  #4  
Old 01-16-2013, 05:25 PM
BassmanPaul's Avatar
Registered User
 
Join Date: Aug 2007
Location: Toronto Ontario Canada
GOLD Supporting Member
At your rehearsal place when you are getting the fuzz, try disconnecting one cabinet. Does it still fuzz? If it does then reconnect the first cabinet and disconnect the second. Again does it still fuzz?? If so it could be the amp or the supply. If one cabinet produces the fuzz and the other one does not then that cabinet is blown.

My gut feeling is that your 1x15 is the culprit. At the store, I suspect, you were not at the same volume level as at your rehearsal place.
__________________
Paul

Grumpy Old Fart #3
  #5  
Old 01-16-2013, 05:35 PM
Registered User
 
Join Date: Jul 2007
Location: Dallas, TX
(I was going to mention the 15, but passed. Thanks Paul.)
__________________
edit signature
  #6  
Old 01-16-2013, 05:46 PM
B-string's Avatar
Registered User
 
Join Date: Nov 2008
Location: Lake Havasu City, Az USA
Supporting Member
It also happened with the combo and only in the winter time. I would have the power company check the supply voltage.
Martin your English was very good.
__________________
Just call me B-String 2
GK Club #488 Big Cabs #175 Peavey Amps #92 50+ Club #44 Grumpy Old Fart #2
  #7  
Old 01-16-2013, 06:33 PM
ldervish's Avatar
Registered User
 
Join Date: May 2005
Location: Johnson City, TN
Supporting Member
My friend's 112 was sounding like that. he checked and verified the battery and the cord. As a last resort before going shopping for a new amp, he spritzed each jack on the amp with contact cleaner, and ran a plug in and out a bunch of times right after spraying each one. Bingo. On his combo the signal chain runs through the headphone jack and external speaker jack and if they get dirty the output is degraded.
__________________
"Politics is the art of so plucking the goose as to obtain the most feathers with the least squawking"
- R.G. 2011
  #8  
Old 01-17-2013, 01:30 AM
Registered User
 
Join Date: Nov 2011
Location: Freiberg, Germany
Thank you guys for your replies! Yeah, the blown speaker was my first thought as well. But both work great, I checked them out with several amps at the music store. Even at high volume levels. Our music store has special rooms for playing bass, guitar, etc, so being too quiet was never a problem... Anyway, looks like I have to focus on the electrical problems of our rehearsal room... By the way, the guitar amp (marshall tsl 60) is not affected at all by this problem... I hate my guitarist for that!...
  #9  
Old 01-17-2013, 06:48 AM
Lowbrow's Avatar
Registered User
 
Join Date: Apr 2008
Location: Oregon, USA
Supporting Member
Turn on the amp, turn each knob all the way up and down and listen for a scratchy sound. Dirty pots can sound like a fuzzy amp or blown speakers. Just spray out the pots with non-silicone contact cleaner if this is the issue. Honestly, I once almost replaced all my speakers one by one until I discovered this was the issue.
__________________
Bury me with my Fender P.
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

vB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

Visit TalkBass on Facebook   Download our iOS app   Download our Android app

All times are GMT -6. The time now is 11:16 PM.




2012 Talk Music Group Inc. All rights reserved.
Play guitar too? Visit TalkGuitar.com
Powered by vBulletin® Version 3.6.12
Copyright ©2000 - 2014, Jelsoft Enterprises Ltd.