Repurposing an Alpine 15D2 - AVS Forum | Home Theater Discussions And Reviews
Forum Jump: 
 1Likes
  • 1 Post By TexmasterPEB
 
Thread Tools
post #1 of 9 Old 11-28-2018, 07:00 PM - Thread Starter
Member
 
Join Date: Oct 2018
Posts: 123
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 60 Post(s)
Liked: 28
Repurposing an Alpine 15D2

I tried out a lil’wrecker, and either I punted on the build, or the only position I could put the beast in my room lefts lots of voids. So I now have an Alpine 15D2 that needs a home.

The specs that came with the driver include box dimensions, with a vented enclosure that goes down to 29Hz. I know that what they provide is more geared toward car audio, so I’m curious if I could take it down a few Hz without building a monster box? This one will live in the family room, so momma says it cant be an eyesore.

This will be dual use; tv/movies and music. Power will be 300 watts rms.

Thus, my question is should I just stick with the specs Alpine provides, or can I get more out of the sub w a different volume box, port or both. If something other than whats provided, what dimensions should I build to?

Thanks

Last edited by TexmasterPEB; 11-29-2018 at 05:34 AM.
TexmasterPEB is offline  
Sponsored Links
Advertisement
 
post #2 of 9 Old 11-28-2018, 08:00 PM
AVS Forum Special Member
 
Join Date: Jan 2015
Location: United States
Posts: 2,530
Mentioned: 48 Post(s)
Tagged: 0 Thread(s)
Quoted: 1258 Post(s)
Liked: 1973
I built mine in a 6 cubic foot box ported down to around 18Hz with my Alpine 15

You can model it in WinISD Pro or other freeware programs to get an idea of your frequency response, port size, power handling and so on. It has been awhile but I think mine modeled at -5dB down at 18Hz with a 6 cubic foot box--or very close to that. Figure out the max size you can go, model it then figure out various sizes and see how it effects the curve.

Good luck!
18Hurts is offline  
post #3 of 9 Old 11-28-2018, 09:03 PM
Senior Member
 
Zarkoff500's Avatar
 
Join Date: Aug 2017
Location: Seattle
Posts: 446
Mentioned: 13 Post(s)
Tagged: 0 Thread(s)
Quoted: 180 Post(s)
Liked: 138
I was going to use my 15D2 in a Marty Cube (~4.75 cft/20 hz tune) which models pretty well in that enclosure until the UM18 went on sale and I'm going that route instead. The Alpine actually looks to have a flatter frequency response in the Marty Cube but is about 4 db down at the tuning frequency vs the UM18 according to Winisd. The Alpine will require quite a bit less watts though so you could get by with an inuke1000DSP VS an inuke3000/6000DSP for the UM18.
Zarkoff500 is offline  
Sponsored Links
Advertisement
 
post #4 of 9 Old 11-29-2018, 05:44 AM - Thread Starter
Member
 
Join Date: Oct 2018
Posts: 123
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 60 Post(s)
Liked: 28
Seems like the MartyCube will fit the bill. Thanks fellas
18Hurts likes this.
TexmasterPEB is offline  
post #5 of 9 Old 11-29-2018, 10:05 AM
Senior Member
 
tk123's Avatar
 
Join Date: Jan 2009
Posts: 430
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 168 Post(s)
Liked: 138
Have you guys had any troubles with the 15 D2 subs ? I have one that I used in my truck but I kept having problems with the coils working intermittently. So, I yanked it out and put a VBSS in its place.
Just wondering because I’m thinking about re-purposing the Alpine somewhere .
tk123 is offline  
post #6 of 9 Old 11-29-2018, 10:06 AM
AVS Forum Special Member
 
trilkb's Avatar
 
Join Date: Mar 2017
Location: Cincinnati, Oh
Posts: 1,182
Mentioned: 16 Post(s)
Tagged: 0 Thread(s)
Quoted: 643 Post(s)
Liked: 324
Mine worked strong in my quadhorn. Now its getting used at a family members house and still going good

- 6 BA CR6 array center channel, QSC AD-S82 L/R, 4 jbl 8330a surr , 8 jbl 12" subs w/Inuke 6000. JVC rs420, Denon x4000, Sony x800 -
trilkb is offline  
post #7 of 9 Old 11-29-2018, 04:33 PM
Member
 
tashspop's Avatar
 
Join Date: Jul 2007
Location: texas
Posts: 194
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 74 Post(s)
Liked: 26
I'm using 2 15d2's in sono tubes in my room now and another in my trunk, zero issues. great subs for the $. the sono tubes are 4.5 cubic feet net if memory serves correctly. My only issue is they are too light and vibrate when the volume is up. I've been thinking of redoing them in martycube similar boxes.

samsung un55hu9000 sek3500 Marantz av7702 Audiocontrol Savoy 7x150 4x MA500U
swope center, tmww fronts, tm surrounds and rears
polk audio OWM3 x4 atmos
4 12" t3 audio subs ep4000 amp 2x15" type r sonotubes
tashspop is offline  
post #8 of 9 Old 11-29-2018, 06:41 PM
Senior Member
 
VegaMan's Avatar
 
Join Date: Nov 2015
Location: Chicagoland
Posts: 266
Mentioned: 5 Post(s)
Tagged: 0 Thread(s)
Quoted: 102 Post(s)
Liked: 78
5 cubes at 20hz, 6 cubes at 18 if you can fit them. I have 4 NIB sitting here for nearfield that ill probably go 5 ft^3 @ 19 or 20hz
VegaMan is offline  
post #9 of 9 Old 12-04-2018, 06:42 AM
Member
 
Mazza's Avatar
 
Join Date: Sep 2017
Location: Australia
Posts: 40
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 11 Post(s)
Liked: 35
I love Alpine drivers, great value, great build quality, great sound.


I modeled the SWS-15D2 in the same box I used for my SWR-1522D - it works a treat and has near identical modeled response.



My in room response at the main listening position is flat to 13hz in this enclosure despite the modeled response f3 at about 28hz. Hope this helps.
Mazza is offline  
Sponsored Links
Advertisement
 
Reply 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