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View Full Version : 2 15"s-4ft3 ???



It happens
03-17-2013, 03:54 AM
i was wondering on your guys opion on this ... like the title says is 2 15" custom made subs too small for 4 ' cubed? the box is built already and desinged for 1 15" tuned to 34hz. but i was thing i might be able to retro fit it for 2 15". by cutting anouther subwoofernext to the other and possibly take out the port wall and seal up the box. or leave the port wall so it would be 2 15" in 4ft3 which sounds unrealistic to me but im not a expert. so bottom line is ... leave the box for 1 15" alone and buy/build a box for 2 15"? or 2 15s with ported or 2 15s sealed ....just wondering your opions thanks

ATLHoe
03-17-2013, 03:59 AM
4cubes is too small for 2 15s...

gckless
03-17-2013, 05:12 AM
Leave the box alone. Run one 15 in it, or get a new box for the two. What subs?

mlstrass
03-17-2013, 06:10 AM
or run 2 12's if you want to slap on another baffle

mclerico83
03-17-2013, 10:56 AM
Sealed 4 cubes could work but depends on what subs. I would build a new box though period or justkeep 1

---------- Post added at 09:56 AM ---------- Previous post was at 09:55 AM ----------

I know a sub you can put 2 sealed in 3 cubes for 15s and give them 2000rms

It happens
03-17-2013, 02:01 PM
the subs are all custom i built them ones has a tc motor and one has re motor...
what subs are those?


Sealed 4 cubes could work but depends on what subs. I would build a new box though period or justkeep 1

---------- Post added at 09:56 AM ---------- Previous post was at 09:55 AM ----------

I know a sub you can put 2 sealed in 3 cubes for 15s and give them 2000rms

mclerico83
03-17-2013, 02:14 PM
Don't mix them. 2 different motors equals 2 different subs. No go have 2 do one.

It happens
03-17-2013, 07:28 PM
now just for the sake of asking questions...whats the worst thing that could happen? lets say i build a box for them and play them at low wattagewhat could i be damageingwould it be the subs , amp, or the sound quality???

Linkz
03-17-2013, 08:00 PM
Bad sound quality. Destructive interference.

RSDXzec
03-18-2013, 02:14 AM
I know a sub you can put 2 sealed in 3 cubes for 15s and give them 2000rms

I'd also be interested in knowing which subs you are referring to.

mclerico83
03-18-2013, 09:03 AM
Cancellation issues. Can actually sound quite vs just the 1 sub

Chriszle
03-18-2013, 10:12 AM
I'm surprised that you have the ability to build custom subs, yet you are asking these questions. Is 4 cubes net, or gross? If gross, it is barely even big enough for 1 15. Mixing subs is not a good idea.

mclerico83
03-18-2013, 10:44 AM
I'd also be interested in knowing which subs you are referring to.

PWE 352 MB Quart 15" 1600W 2 Ohm DVC Subwoofer Speaker Made by Rockford Fosgate 780687314231 | eBay (http://www.ebay.com/itm/PWE-352-MB-QUART-15-1600W-2-OHM-DVC-SUBWOOFER-SPEAKER-MADE-BY-ROCKFORD-FOSGATE-/110889798633?pt=Car_Subwoofers_Enclosures&hash=item19d18c0be9&vxp=mtr)

1.5 cube sealed made in the usa by fosgate :) old stock clearance.

It happens
03-19-2013, 03:41 AM
i was i just asking for everyones opion on what they had thought on this issue

I'm surprised that you have the ability to build custom subs, yet you are asking these questions. Is 4 cubes net, or gross? If gross, it is barely even big enough for 1 15. Mixing subs is not a good idea.

tc300
03-21-2013, 04:31 AM
PWE 352 MB Quart 15" 1600W 2 Ohm DVC Subwoofer Speaker Made by Rockford Fosgate 780687314231 | eBay (http://www.ebay.com/itm/PWE-352-MB-QUART-15-1600W-2-OHM-DVC-SUBWOOFER-SPEAKER-MADE-BY-ROCKFORD-FOSGATE-/110889798633?pt=Car_Subwoofers_Enclosures&hash=item19d18c0be9&vxp=mtr)

1.5 cube sealed made in the usa by fosgate :) old stock clearance.

They model up pretty bad in small sealed on winISD ... all the Fosgate's around that time like bigger boxes and these are made by Fosgate so... That's why shyed away from getting a pair to run sealed

mclerico83
03-21-2013, 09:11 AM
Winisd is junk they work perfectly in 1.5. So you are telling me mb quart is wrong on what to put there subs in.

mclerico83
03-21-2013, 09:27 AM
They model up pretty bad in small sealed on winISD ... all the Fosgate's around that time like bigger boxes and these are made by Fosgate so... That's why shyed away from getting a pair to run sealed

Winisd is not the end all be all and I think soundeasy is a much better version. Plus winisd only tries to find the f3 flat response at .707. The problem with winisd is that it fails to take in account we are in a car and there are many issues like transfer function that have to be taken in effect. That's why many company go with a smaller response of .8 to 1 in there sealed enclosures because in a car the sub tends to then get to low of an extension and sound bloated. Also sealed enclosures size changes are notas detrimental. The f3 raises with with small box and so it gains effeciency with upper notes and power gain. But generally compliment the cabin gain of a car in a sealed box. But winisd beta cannot compute that.

macsdad
03-21-2013, 09:34 AM
The mb q 352 will work wonders in that 1.5 sealed, i have one on my home theatre in that sealed box. Had it in the car, impressive, would have had two in the car if they would have fit. If you want two 15's and are limited on space, you will not regret these in that 3 cuft sealed.

tc300
03-21-2013, 05:45 PM
Winisd is not the end all be all and I think soundeasy is a much better version. Plus winisd only tries to find the f3 flat response at .707. The problem with winisd is that it fails to take in account we are in a car and there are many issues like transfer function that have to be taken in effect. That's why many company go with a smaller response of .8 to 1 in there sealed enclosures because in a car the sub tends to then get to low of an extension and sound bloated. Also sealed enclosures size changes are notas detrimental. The f3 raises with with small box and so it gains effeciency with upper notes and power gain. But generally compliment the cabin gain of a car in a sealed box. But winisd beta cannot compute that.


Hmm.

I know my cars cabin gain, have it wrote down some where. Lol. Maybe I will go with a pair of the quarts. I can get about 4.2 cuft in my trunk...