Go Back   Home > Forums > >
Home Forums Rules Articles diyAudio Store Blogs Gallery Wiki Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Subwoofer in-room response
Subwoofer in-room response
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 28th December 2006, 09:00 PM   #1
Pick1 is offline Pick1  United States
diyAudio Member
Join Date: Jul 2006
Default Subwoofer in-room response

I am looking at a subwoofer design using two 12" Titanic MKIII drivers (wired in series) and the Dayton 1000W amplifier. The objective is to get the best performance (good sound quality and high SPL) possible form a small enclosure. I can place these drivers in a 1.7cf enclosure with a Q of about 1 and f3 of about 37. This subwoofer will be used in a room 19ft by 14ft with 9ft ceiling. One of the 19ft walls is only half enclosed with the other half opening to the rest of the house. The subwoofer will be located near a wall, most likely near a corner.

I have considered using a Linkwitz transform circuit to achieve a lower f3. I wonder if I really need to do this (and put the drivers though the added abuse), or if the driver will provide good response down to 20Hz with room loading.

I have also been encouraged to explore vented designs. My compact enclosure requirement seems to make this approach less practical. I also have concerns with the group delay of the vented design at low frequencies.

I have been encouraged to explore the RS drivers. The excursion limits keep driving me back to the Titanic drivers.

Getting to the point, I am wondering if I need to be concerned about the 37Hz f3. Most commercial subwoofers publish specs closer to 20Hz. It is questionable in most cases if these specs are anechoic or room loaded. It is also questionable how they achieve low frequency extension. What type of musical and HT performance should I expect from the proposed design?
  Reply With Quote
Old 29th December 2006, 01:04 AM   #2
BassAwdyO is offline BassAwdyO  United States
diyAudio Member
BassAwdyO's Avatar
Join Date: Jun 2004
Location: Illinois
Send a message via AIM to BassAwdyO
A linkwitz transform just might be your friend in this situation... A Q of 1 is pretty high by most standards as far as I'm aware, so lowering that down to .7 or so electronically may yeild desireable reults...

I would aim for a F3 of 30hz myself using a sealed box
The golden rule of DIY:
Build nice, or build twice!
  Reply With Quote


Subwoofer in-room responseHide 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

Forum Jump

Similar Threads
Thread Thread Starter Forum Replies Last Post
OB in room response valleyman Full Range 11 6th August 2008 08:16 PM
desired in room response-what do you go after? terry j Multi-Way 13 18th September 2007 08:09 AM
Room response gfinlayson Multi-Way 11 15th May 2006 11:18 PM
In room response? 2litre Subwoofers 5 16th January 2006 10:26 PM
MTM - How to measure in room response? Spearmint Multi-Way 9 13th November 2004 09:09 AM

New To Site? Need Help?

All times are GMT. The time now is 12:11 PM.

Search Engine Optimisation provided by DragonByte SEO (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Resources saved on this page: MySQL 16.67%
vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright ©1999-2017 diyAudio