About sub boxes.. - Page 2 - diyAudio
Go Back   Home > Forums > Loudspeakers > Subwoofers

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 27th February 2013, 10:29 PM   #11
kouiky is offline kouiky  United States
diyAudio Member
 
Join Date: Jun 2009
Yes, and depending on the driver it may offer a wide peak.
  Reply With Quote
Old 27th February 2013, 10:36 PM   #12
tigox is offline tigox  Portugal
diyAudio Member
 
Join Date: Jul 2012
Quote:
Originally Posted by kouiky View Post
Yes, and depending on the driver it may offer a wide peak.
so what are optimal caracteristics on a driver i should look for?
  Reply With Quote
Old 27th February 2013, 10:53 PM   #13
kouiky is offline kouiky  United States
diyAudio Member
 
Join Date: Jun 2009
Generally, a Qts lower than .6, an Fs in the region that you wish to realistically reproduce without EQ, and a very low Vas, indicating a stiff mechanical compliance. The Hi-Vi SP10, Dayton Ultimax and Scan Speak aluminum 9" subwoofer each fall under the category by some means. They all will produce extended bass to 20Hz or lower in relatively small enclosures requiring no EQ. Now to answer your question- what woofer characteristics would offer a wide Q peak and maximum band gain in a small box? I can't think off the top of my head because its exactly the type of system I avoid. LOL It can however be achieved by using a low Vas/ low Qts driver in a box too small. A high Qts driver can have an unwanted narrow FR peak, like the one in the picture you generously provided.

Last edited by kouiky; 27th February 2013 at 11:05 PM.
  Reply With Quote
Old 27th February 2013, 11:35 PM   #14
kouiky is offline kouiky  United States
diyAudio Member
 
Join Date: Jun 2009
At this point one may pose the question: "If I can get great extension from a driver that makes deep bass in a small enclosure, why would I ever consider using a driver that requires a box the size of a refrigerator to do the same thing?" The answer is because they do not do the exact same thing. This brings us back full circle to efficiency and compliance. Low Vas drivers have large magnets to help overcome the high losses of stiff controlling suspension, but are still lower in efficiency compared to high Vas drivers. High Vas compliance drivers do not fight rigid suspension that is set in concrete, but often need support in the lowers frequency region. You've probably read "high efficiency drivers sound more detailed and lifelike" from many high efficiency builders, and to some degree there is truth in this. However, I've found its often mitigated by the fact that you can get superior performance from drivers in intermediate efficiency dB range that rival or outright trump many high efficiency drivers, and thus I prefer to find my intermediate point where I get the best of both worlds.

Last edited by kouiky; 27th February 2013 at 11:48 PM.
  Reply With Quote
Old 28th February 2013, 02:09 PM   #15
diyAudio Member
 
Join Date: Mar 2006
Location: Montana Missoula
Default It really can't.

Quote:
Originally Posted by tigox View Post
oh ok, but what i don't get is how can a subwoofer work in such a small space?
If you run test tones you will see very little (sub) output for a given number of watts fed into it. Those micro subs may have a nice peak at 50-60hz but drop off fast below tuning.
High excursion drivers and ton's of power/eq can work in a small box but hoffmans iron law is still in working against it.
  Reply With Quote
Old 28th February 2013, 08:01 PM   #16
diyAudio Member
 
chris661's Avatar
 
Join Date: Feb 2008
Location: Sheffield
Blog Entries: 8
^ +1

Also, electrical compression is often used to reduce the peak power into the subwoofer (you can hear it cut in occasionally when cranked).

Hook a "sub" like that up to a clean, powerful amplifier and see what it can actually do.
  Reply With Quote
Old 28th February 2013, 09:17 PM   #17
tigox is offline tigox  Portugal
diyAudio Member
 
Join Date: Jul 2012
Quote:
Originally Posted by chris661 View Post
^ +1

Also, electrical compression is often used to reduce the peak power into the subwoofer (you can hear it cut in occasionally when cranked).

Hook a "sub" like that up to a clean, powerful amplifier and see what it can actually do.
Yeah i hooked it up to my kenwood car amp and it was freakking amasing O_o , very good quality/power this kenwood amp, very worth the price


__________________________________________________ _______________


So this got me thinking, how do i calculate a box that "pulls some plugs" in these subwoofers to have a good bass for the size?
  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
Boxes or Not joaquim Full Range 118 1st August 2011 07:15 PM
Reusing Old Sub Boxes? hawkson Subwoofers 6 11th April 2011 06:36 PM
Reusing Old Sub Boxes? hawkson Parts 0 10th April 2011 11:28 AM
new boxes GringoAudio Multi-Way 2 18th August 2004 03:50 AM
2 boxes zcab911 Multi-Way 2 17th July 2003 09:38 AM


New To Site? Need Help?

All times are GMT. The time now is 02:00 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