RE Audio XXX 12" sealed box recommendations


teptepley1

Junior Member
Jun 26, 2011
30
0
Lake county, OH
I currently have one 12" 2 ohm RE Audio XXX sub on an american bass phantom series 2500 watt amp run at 1 ohm (1250 RMS) in a ported box, 3 cubes at 33Hz setup in a 2000 ford explorer. kinda pissed i got talked into ported because i bought the sub to go for all out SQL while still having good SPL, but even more pissed that i listened to RE's ported box specs. After looking around i know it is way to small. ALSO, I'm in the market for a Hifonics Brutus 2100 watt amp (BRZ2100.1D) or Brutus 2400 watt amp (BRZ2400.1D) to better power this thing.

SO, before i go build another box, i was wondering what people who have this beast would recommend for a sealed enclosure because 1.1 sounds waayy to small.

 
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teptepley1

Junior Member
Jun 26, 2011
30
0
Lake county, OH
bought brand new off sonic for 500 about a month ago so its the new one.

also i read a bunch of posts (many on here) that recommend sealed to achieve the insane xmax these subs can put out.

 

Trancer

CarAudio.com Veteran
10+ year member
Aug 9, 2002
2,768
10
Allen, Texas
Old XXX arent as fantastic as the older ones, but you will be disapointed going from that box to a sealed enclosure with that sub. But I dont think thats the problem. Your box is rather big for that sub. Try building another ported box at 2.2 cubes and tuned down to 30-31hrz...

And that sub is not going to really start wanging till you give it a few more wattage... especially in that big of a box. Bigger box = more efficiency.. You are already under powering it as it is.

So, smaller box, give it recommended wattage, and go with a lower tuning. I think you'd be alot happier doing that.

 

Trancer

CarAudio.com Veteran
10+ year member
Aug 9, 2002
2,768
10
Allen, Texas
Eh... I heard two of the new XXX's in a 7 cube box. Not sure what it was ported at, but thats pretty similar.. just .5 cube more than what he is running. It sounded kinda MEH'ish...

 
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teptepley1

Junior Member
Jun 26, 2011
30
0
Lake county, OH
Hmmm.... everything ive ever read about these subs suggests larger sealed enclosures for best use of the excursion and best sound. Has anyone every heard one (or more) in both?

and i know its way underpowered, that was just the amp i had from my last setup. im trying to get one of the hifonics amps but i havent found one for the right price yet.

 

Imtjnotu

Me Gusta Edition
10+ year member
Nov 28, 2006
13,185
298
San Diego CA
any dd....sound stream makes some good ones.....Sundown 2500d would do good off that....orion 2500d if u can find one

 

The_Grimy_One

CarAudio.com Veteran
Apr 27, 2011
4,348
52
Phoenix, AZ
I too would think that box was ideal. You could have tuned it a lil lower. Other than that, should sound good. Only think I can think of is that you need more wattage, but that wouldnt make it sound bad, just wouldnt push it to its potential.

What exactly sounds bad about it?

 
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teptepley1

Junior Member
Jun 26, 2011
30
0
Lake county, OH
More power and a HUGE sealed enclosure
How huge?

And it sounds a little sloppy on songs with double bass or just weird bass base lines. I listen to rap but not exclusively. Like this calling and, just cuz its probably the best example, I gotta feeling, sound kinda bad on it as well as others. And my experience has always been that sealed boxes help produce tighter more accurate bass.

Also about the much needed extra power, its coming very soon. I'll have around 2000 cea certified watts running to it.

 

RAM_Designs

SketchUp Master
10+ year member
Feb 26, 2006
21,735
362
Rockwall, TX
View attachment 26525551
this is the box i have it in right now.

14.25H 15D 36L

3 inch port, total port length is 26.5

port area 38.25

33.8 Hz
The issue with the RE calc is that it does not take into account any displacements other than the port. The sub itself is another .25ft^3 in this case, which shrinks your box volume and also raises your tuning a little.

What exactly do you not like about how everything currently sounds? Are you wanting more low-end? These are not efficient woofers; it takes lots of power and a proper box to get them loud.

 
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teptepley1

Junior Member
Jun 26, 2011
30
0
Lake county, OH
Its peaky. Hits real loud then just drops off. It almost sounds like it hits backwards. Not the best way to describe it but I can't think of another way to say it. I really just want a flat response from as low as I can (say 20-25) to like 80. I'm not sure If this is possible in any box but id be happy with a flatter response across a broader range than It hits now.

I've recently discovered a video of a 12 In a 4th order bandpass box that hit pretty flat in that range but I have no experience with them. Any advice on those would be appreciated too.

 

RAM_Designs

SketchUp Master
10+ year member
Feb 26, 2006
21,735
362
Rockwall, TX
You're going to want to do something like 2.25-2.5ft^3 with a 25-26hz tuning. Since the Fs is so low(21hz), tuning even at 33hz is going to give you a big peak that will just seem to drop off on either side(mainly lower). Going with a slightly smaller box and a lower tuning will hurt efficiency, but throw 3kw at it and you should get some good bass out of it. I don't expect it to play very well up to 80hz though.

 

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