Advice Needed: "Flabby" Amp Low-End - diyAudio
Go Back   Home > Forums > Amplifiers > Tubes / Valves

Tubes / Valves All about our sweet vacuum tubes :) Threads about Musical Instrument Amps of all kinds should be in the Instruments & Amps forum

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 22nd October 2010, 01:16 AM   #1
diyAudio Member
 
Join Date: Oct 2010
Location: Ohio, USA
Send a message via AIM to independentexile Send a message via Skype™ to independentexile
Question Advice Needed: "Flabby" Amp Low-End

Hello all,

I'm looking for a little advice to help me fix a Peavey Bravo 112. The amp sounds fine when the low and mid ranges are set real low. However, when I turn up the bottom end roughly at or past halfway, the amp starts making distorted sounds - and not the good kind. The best way that I can think to describe it is "flabby". It almost reminds me of a piece of paper flopping around in the wind or when it's tied to the front of a fan. If it would help, I would be glad to post a sound file. This problem is affecting both clean and distorted channels. Turning up the mids make it even worse.

I have replaced the tubes and tried turning the reverb down all the way, but neither of these quick fixes had any effect. Any suggestions? Obviously, I'm hoping that the speaker might be the culprit, but I'm not sure. If this may be the case, any suggestions as to where to purchase a new speaker?

Thanks much!
Josh
  Reply With Quote
Old 22nd October 2010, 03:12 AM   #2
diyAudio Member
 
jerluwoo's Avatar
 
Join Date: Feb 2006
Location: Ashland,Ky U.S
easy enough to test the speaker by just hooking it to a radio and see if you hear same type of distortion.
  Reply With Quote
Old 23rd October 2010, 03:27 AM   #3
diyAudio Member
 
Join Date: Jul 2008
use the below spl calculator to determine if you have enought watts in your amp for the room and speakers you are using relative to the seating distance.

Peak SPL Calculator


the position of the volume knob does not mean anything, if you have enough input drive, you an hit your rated output before you get near volume center point.
  Reply With Quote

Reply


Hide this!Advertise here!
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

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


Similar Threads
Thread Thread Starter Forum Replies Last Post
"Audio Refinement" Complete amp blown cap & transistor: Need advice mr_macgee Solid State 13 7th May 2010 06:53 AM
Building "Munny" Speakers, need advice on damping material, grill cloth... paulmurphy Parts 1 8th August 2008 06:10 AM
DIY "speaker box" ("BOOM BOX"). Help needed. MASantos Full Range 6 2nd September 2007 12:00 PM
Continuation of 8" 45L sub with low end EQ moving_electron Multi-Way 7 10th May 2004 05:48 PM
Looking for a high-end 8"-10" (20cm) midbass Vortex Multi-Way 25 31st January 2004 09:03 PM


New To Site? Need Help?

All times are GMT. The time now is 02:16 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2