Equalizing/adjusting a semi-DIY subwoofer - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

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 1st January 2012, 09:18 PM   #1
diyAudio Member
Join Date: Jan 2012
Location: Ponce
Default Equalizing/adjusting a semi-DIY subwoofer


I have some question in regards of subwoofer equalization. The Sub I have is a 12inch Sony I rescued from termites . Termites ate the entire cabinet in a matter of days so I had to remove the board and speakers to reinstall in a car "dog house" cabinet. After that I really never got to set, let alone adjust, the settings on the SW being the main reason that I dunno how to properly do it.

I have searched online but I have yet to find a tutorial easy to understand.

I want to understand what Phase (normal or reverse) and Cut Off Freq (a knob from 50Hz to 170Hz) is and do in a way a grandmother could understand. My room is a 10ft x 20ft studio apartment if that helps in any way. Any help is appreciated. Thanks a bunch!
  Reply With Quote
Old 2nd January 2012, 12:10 AM   #2
JoeDJ is offline JoeDJ  United States
diyAudio Member
JoeDJ's Avatar
Join Date: Mar 2011
Location: NY State
In very simple terms......

"Phase" refers to when all speakers are vibrating in unison... all speakers are going out and in together and no speaker is not vibrating "out" when another is vibraing "in"
This is acomplished by making sure that the + wire is conected the to + terminal on all speakers. This is called "in phase"
However, with a sub, sometimes a sys will sound better when the sub is "out of phase" (depending on the sub's placement in the room) so, a phase reversal swithch is included on the sub. Experimentation is in order to determine which is best.... which setting gives the most pleasing bass.
So, there is no right or wrong way to set it.

The frequency adjustment knob is simply adjusted to where you like the sound. The cutoff frequency is where the sub takes over for the main speakers and vice versa and/or the highest level of freqs the sub reoproduces..... depending of the way the sub is connected to the sys. Again, you simply adjust it to where you like the sound....... to where the bass sounds balanced.

Of course, a sub also has a volume control that also has to be adjusted.

Last edited by JoeDJ; 2nd January 2012 at 12:33 AM.
  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
Adjusting zero position Subwoofer Courtec Subwoofers 2 6th July 2010 03:50 PM
diy WMTMW SEMI OPEN BAFFLE joz Multi-Way 17 20th November 2009 11:02 AM
Semi-PA-Mid-horn-DIY ? TroelsM PA Systems 0 20th June 2007 06:30 AM
Equalizing input volume jaudio Chip Amps 8 19th April 2005 10:33 PM

New To Site? Need Help?

All times are GMT. The time now is 04:14 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