|
[Previous Message]
[Next Message]
|
| Date: |
October 15, 2009 at 18:49:32 |
| From: |
norman bates, [oproxy.rockwellcollins.com] |
| Subject: |
I wouldn't fo anything |
|
|
|
|
2 sealed in .25ft3 is qtc .707 giving f3 of 83hz (yuck).
Now 2 in a .42ft3 ported to 40hz would require a too small port 2" near 11-12" long. The port is too small and tuned to 40hz at cranking volume, music under 40hz will bottom them out fast. A larger port requires a longer port, so that is out of the question. That is why djk recommends a passive radiator. Even a 40hz tapped horn will run out of excursion below 30hz quickly........
You are in a mini van ?
Jez, if you want bass, free up some space for a pair of 12"s, 1.5ft3 sealed each should get you some bass. A dual 12" with 1.2ft3 each box is availiable from partsexpress usually less than $40.
A low qts driver can work well with a PR tuned below optimum with massive eq to get flat response, then with subsonic filtering.
I'd aim for a sealed qtc .707 with an f3 near 45hz, that works well in any vehicle.................... I like 12's for a vehicle (manageable size) but hard to find a 12 that meets those (f3=45hz in qtc.707 that is <1.5ft3) requirements.
Even tuned to 30hz at home, I can easily skip past 8mm xmax (dual 15's) due to low freq garbage in recordings, a subsonic filter would increase the volume I make immencely without the woofers bouncing out of control.
Norman
Moderated By: brian@diysubwoofers.org
|
|
|
| View the previous message in this thread
Go to the top of this thread
View entire thread |
Posted with TalkShop version
2.77 BETA |
[Previous Message]
[Next Message]
|
|
|
Follow Ups: |
|
|
|
[
The Subwoofer DIY Page - Discussion Forum ] [ FAQ ] |
|
|
|
