45hz bass boost on amp sounds gummed up? - diyAudio
Go Back   Home > Forums > Live Sound > Instruments and Amps
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Instruments and Amps Everything that makes music, Especially including instrument amps.

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
Thread Tools Search this Thread
Old 22nd February 2013, 02:45 AM   #1
diyAudio Member
Join Date: Sep 2012
Default 45hz bass boost on amp sounds gummed up?

it's not distorted but it sounds a bit muddy when I have 6 or 12 dB bass boost on my amp.
the bass sounds too muddy for 45hz but when I use the EQ on my computer it sounds great and clear.
tried many different speakers. from 12 inch subwoofers down to crappy 16 ohm 2 x 4 inch tv speakers rated for probably less than 5 watts.
all speakers have muddy bass at 45hz bass boost.
any idea as to why?
  Reply With Quote
Old 22nd February 2013, 02:50 AM   #2
Enzo is offline Enzo  United States
diyAudio Member
Join Date: Sep 2004
Location: Lansing, Michigan
Do you know that to double the output power of an amp is to raise the level 3db? And the reverse, if you ask a 3db increase from the amp, it has to double the power at that freq to do so. every 3db is to double the power again. SO a 12db increase or boost would be like asking your power amp to double double double double the power output. Your amp is not limitless, so it just runs out of room to produce a clean waveform.

If your speakers cannot produce 45Hz, boosting the 45Hz in the signal won;t make the speakers do it.

I suspect you are overdriving your signal path.
  Reply With Quote
Old 22nd February 2013, 02:56 AM   #3
diyAudio Member
Join Date: Feb 2008
Location: Jackson,michigan
This is becuase the crispness that you are used to hearing in bass instruments are actually higher in frequency.

They are harmonics that are higher than say the 45hz that you hear.
Typically in the 150hz to 400hz range and higher depending on the instruments timber or character of its sound.

  Reply With Quote
Old 23rd February 2013, 01:52 PM   #4
diyAudio Member
Join Date: Sep 2012
that makes sense
  Reply With Quote
Old 24th February 2013, 10:02 PM   #5
diyAudio Member
Join Date: Oct 2004
Location: Adelaide South Oz
Take a look at the "tight" switch on a Hughes an Kettner TriAmp (Clean/Crunch Channels).


The filter circuit on page E of the schematic is inserted into the cathode of the input stage (in place of a cathode bypass cap). It rolls off the sub 100Hz response very agressively to ggive a "TIGHT" response.

  Reply With Quote
Old 24th February 2013, 10:56 PM   #6
JMFahey is offline JMFahey  Argentina
diyAudio Member
JMFahey's Avatar
Join Date: Mar 2009
Location: Buenos Aires - Argentina
Many Amps famous for their good sound have switches which actually *CUT* Bass .
I'm talking Ampeg/Gallien Krueger/Sunn here.
  Reply With Quote
Old 24th February 2013, 11:20 PM   #7
tinitus is offline tinitus  Europe
diyAudio Moderator R.I.P.
Join Date: Nov 2005
Originally Posted by realflow100 View Post
....... muddy bass at 45hz bass boost.
any idea as to why?
difficult to say, especially without knowing how the boost is done

I have ongoing experiments with my 3way bass guitar speaker

my new DIY preamp was a huge improvent in every way

after that I did very small adjustment to the mid/tweeter xo
this actually resulted in greatly improved bass response from my 15" woofer
even more funny that the woofer have its own amp, and no xo of any kind

I also have a midbass horn
when I connect that, everything changes again

its just to say, its never simple at all
  Reply With Quote


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
Car subwoofer sounds muddy but hits low bass well (sluggish bass) dannyjmf Subwoofers 11 24th August 2012 07:01 AM
Bass Boost for Objective 2 Amp? jschristian44 Headphone Systems 1 30th January 2012 03:12 AM
small bass boost addon for car chip amp? 2fast Car Audio 3 10th June 2005 10:12 AM
shivas sub& bass boost circuit busterno1 Subwoofers 7 1st September 2004 08:02 AM
12 db bass boost 40hz vs 45hz...? ChesterFuzzin' Multi-Way 7 22nd November 2002 02:22 AM

New To Site? Need Help?

All times are GMT. The time now is 03:17 AM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2