Which SUB: Tempest or "XXX" (which is better?) (1 Viewer)

[Chris Carswell]

Ok, I started down the DIY sub road last week. I'm on a $200 budget so it will be tough, but I know you guys can help. I picked up a PE #300-800 150 watt plate amp cheap so now all I need is a sub. Box will be similar to Chris's Frustum Pyramid Tempest: http://www.angelfire.com/sports/RCcars/protosub.html/
I wanted to go tempest but will got over budget. I started shopping arround for others. I found this one "XXX" brand new that I can get pretty cheap & I have heard good things about it. I am not that good with stats so tell me what you guys think:
"XXX"
15" 4 ohm SVC
$85.00 my cost new (130.00 reg price)
PARAMETERS
Fs 31.88
QMS 4.72
QES 0.57
QTS 0.511
VAS (Liters) 123.79
REVC (Ohms) 1.8
SPL @ 1 watt / 1 meter (dB) 90.32
X-max Linear pk-pk (mm) 24 (so 12mm one way)
LEVC at 1k Hz (mH) 0.92
ENCLOSURE VOLUMES - Ported
Vented (Cu. Ft) 4
Vented to (Hz) 34
3dB down point (-3dB Hz) 33
Port Diameter (") 4
Port Length (") 12.25
Number of Ports 2
------------------------
Tempest:
$150.00
PARAM VALUE
Re 3.50 ohms
Le 2.9 mH
Qms 6.7
Mms 195 grams
Qes 0.40
Cms 0.34 mm/N
Qts 0.38
Rms 3.5 N*s/m
Fs 18.8 Hz
Sd 779 cm^2
Vas 317 liters
BL 14.2
Xmax 16.4 mm one way
EBP 47
SPL 89.1 dB @ 1W/1m
No 0.51%
Pmax 400W per voice coil; 750W total to the driver
Distortion

 

[Pete Mazz]

First of all, the XXX driver looks to be set up for car audio use. I don't think your amp will be able to drive a 2 ohm load. That and a high Fs makes for a sub-standard HT driver.
You won't be dissappointed with the extra outlay of cash for the Tempest.
Pete

 

[Brian Bunge]

Pete,

That's a single VC, not dual.

And I agree. Either get the Tempest or the Parts Express DVC 15" sub. I just finished a DVC 15" subwoofer today for a customer and I am thoroughly impressed! It's 175L tuned to 17.5Hz with the PE 250W plate amp and the 4" flared port. I was hitting 111dB on the "Coming Mother" scene from "The Haunting" from around 6' away and didn't have the sub anywhere near maxed out.

Brian

 

[Pete Mazz]

I was looking at RE = 1.8 ohms....

Pete

 

[Chris Carswell]

I just checked and it is a 4 ohm DVC woofer. I guess wouldn't be good to power just one of the coils to meet a 4 ohm load. I really should get something that goes lower than 30hz, dauh......

 

[Jeff Rosz]

heya,
do the dirty deed and go over budget and get the tempest. what else are budgets for? heh, im thinking the tempest will give the XXX a bloody nose in the car app too.

 

[JimPeitersen]

How about the Stryke Audio (www.stryke.com) SAE 1501 on preorder for $99? Seems to be equivalent to the Tempest and 15 DVC.

 

[ThomasW]

Fs 31.88

Just say no.....

 

[Chris Carswell]

Jeff; Are you married? You know where that is going. WAF!!!
Jim; $100 hell yah. Wow those look gooooood but,when are they shipping:frowning:?
Thomas; I know.....What was I thinking. I did see an 18" for the same price as the tempest that went to 26hz but that is still a little high.