Recommendations for enclosure to house 2 x 10" drivers - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 
Thread Tools
post #1 of 10 Old 04-09-2006, 10:07 AM - Thread Starter
Newbie
 
cswake's Avatar
 
Join Date: Apr 2006
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Hi everyone, this is my second DIY subwoofer project and am back again for more trouble. :) I have two (free) Bazooka subwoofers that have the following specifications:
  • 200w RMS
  • 450w Peak
  • Minimum Enclosure Volume: .3 cu ft
  • Recommended Enclosure Volume: .6 cu ft
  • Vented Enclosure Volume: 1.5 cu ft
  • Impedence: 4ohm
  • Efficiency: 90db
With that said, I am pairing the subwoofer up with a Polk system that is composed of RM201, RM202, and RM101 satellites. Since this is a "micro" system, the prioritized goals for the box are:
  1. Size of the box - minimize both external dimensions and footprint
  2. "Punch" of the box - this will be a sub for 70% music and 30% movies
  3. Quality of sound reproduction
  4. Ease of construction
  5. Cost
I'd consider only using one driver if output is good, but I was leaning toward creating an isobaric box to fulfill goal #1. Guidance is definately welcomed. :)
cswake is offline  
Sponsored Links
Advertisement
 
post #2 of 10 Old 04-09-2006, 10:14 AM
Advanced Member
 
derekbannatyne's Avatar
 
Join Date: Aug 2005
Posts: 685
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I think that almost everyone here would reccomend not using those Bazooka subwoofers because there's much better optoins out there. Could you just sell those to buy a better driver(s)?
derekbannatyne is offline  
post #3 of 10 Old 04-09-2006, 10:44 AM - Thread Starter
Newbie
 
cswake's Avatar
 
Join Date: Apr 2006
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Derek, could you elaborate on why these Bazooka's should go? Selling them off is an option, but I have a feeling they won't command too much of a price. Nevertheless, is there a specific driver you have in mind that would better fit my goals for this project? (This also opens up the possibility of going down to dual 8" drivers... or a single quality 10")
cswake is offline  
Sponsored Links
Advertisement
 
post #4 of 10 Old 04-09-2006, 12:58 PM
Advanced Member
 
derekbannatyne's Avatar
 
Join Date: Aug 2005
Posts: 685
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I think it's because that car subs are usually meant for highest spl and generally aren't suited for home use; car subs usually have a high fs and many of them sound one-noted. How big of a box can you live with and what's your budget? That will determine what kind of sub you can build. You should probably check out the DIY showcase on http://www.htguide.com/forum/forumdisplay.php4?f=6, it's a sticky on top.
derekbannatyne is offline  
post #5 of 10 Old 04-09-2006, 03:53 PM - Thread Starter
Newbie
 
cswake's Avatar
 
Join Date: Apr 2006
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
I already looked through that sticky and tried to search the forums for similar projects but didn't have too much success finding 8" and 10" based boxes. My maximum size for a box would probably be about 1.5 cu ft, but the other goals would have to compensate quite a bit. No matter what the size of the box, the budget for the project can run up to $500.
cswake is offline  
post #6 of 10 Old 04-09-2006, 05:20 PM
AVS Forum Special Member
 
Tom Brennan's Avatar
 
Join Date: Apr 2002
Location: Chicago
Posts: 1,952
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 12
What are the Thiel-Small specs-----fs, vas, qts and such?

You have to know them to work things out or for us to help you do so.
Tom Brennan is offline  
post #7 of 10 Old 04-09-2006, 06:17 PM - Thread Starter
Newbie
 
cswake's Avatar
 
Join Date: Apr 2006
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Found them:
  • FS:29
  • Qts:.25
  • Qms:5.29
  • Qes:.27
  • Vas:2.32
  • Xmax:1.14
  • Re:3.6
  • RMS:180
  • Max:250
  • Le:1.4
  • Sens:90
cswake is offline  
post #8 of 10 Old 04-09-2006, 07:47 PM
Advanced Member
 
derekbannatyne's Avatar
 
Join Date: Aug 2005
Posts: 685
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
Is that 1.14mm Xmax? That seems really low, so it's probably in inches, but that would be really high, over 30mm.
derekbannatyne is offline  
post #9 of 10 Old 04-09-2006, 08:19 PM
AVS Forum Special Member
 
DonoMan's Avatar
 
Join Date: Feb 2005
Location: Massachusetts
Posts: 4,162
Mentioned: 9 Post(s)
Tagged: 0 Thread(s)
Quoted: 290 Post(s)
Liked: 215
cm, I assume.

I don't like Bazooka. But hey, if you're determined to use them, a vented box of 76L (2.68 ft^3) tuned to 36Hz will give you a lower F3 of about 37Hz. Not that good. If you want to shoot for -4dB instead of -3dB, go 4 ft^3 tuned to 30Hz to give you a 30Hz lower F4.

Quit on 1/23/2020 due to constant "file not found" errors on the server while trying to submit posts. It's one problem for your server to have an issue but totally different for it to, day after day, continue having issues that don't get fixed. The time we spend writing this content should not be considered so worthless that the server should feel free to destroy our content.
DonoMan is offline  
post #10 of 10 Old 04-09-2006, 09:37 PM - Thread Starter
Newbie
 
cswake's Avatar
 
Join Date: Apr 2006
Posts: 7
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Liked: 10
The Xmax is in inches. I know there are issues with using a car sub in my home application, but pairing them with some MDF ($20) and an inexpensive plate amp should result in a good box.
cswake is offline  
Sponsored Links
Advertisement
 
Closed Thread DIY Speakers and Subs

Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page


Forum Jump: 

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