Avalanche 18

by ssallstar598
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getting rid of my tempest and yep yep ima go for the big guns and move some SERIOUS air w/ this bad boy since ascendent is getting rid of their XBL2 technology to replace it w/ an alternative to XBL2 that they made themselves.... and its only 275 + shipping... yay!

anyways... ive looked at the ported box specs for this sub and it suggests a TON of cubes.... ive got a blazer w/ all the room in the world so that wont be a problem but WOW...

Enclosure size 20 ft3 16 ft3 12 ft3
Port tuning 12 Hz 15 Hz 16 Hz
Power handling 500 watts 750 watts 800 watts

i plan on running 600 watts to it

(specs on the sub)

Fs 16 Hz
Qms 6.00
Qes .429
Qts .400
Vas 550 L
Re 3.2 ohms
Znom* 4 ohms
Xmax 27 mm
Sd 1210 cm2
Mms 369 g
Vd 6.53 L
Pnom 800 watts
Le 2.4 mH
Cutout 16.75"
Diameter 18.5"
Depth 9.1"
Weight 42 pounds
*dual 2 ohm coils in series

anywho... can anyone design a box up for me? the winisd doesnt want to run on my computer.. it says ERROR MISSING CRITICAL FILE TO RUN PROGRAM even when i re install it....




Replies (12)
palmquist on 06/1/2005 22:27:54
hey...

i could build it for you... im not a pro ill admit but i have built 3 boxes and they sound pretty nice... im still learning alot about it, but i can do it for u for a good price

palmQ

swez on 06/1/2005 23:06:26
Seriously.... if you want bass for music, something in the 35 Hz range is plenty good. There's just not much content out there below 30 Hz., in most recordings on CD except for sound effects used in THX Video systems and the like. If you are into Church organ music, might get a few peddle tones below 30 Hz.

A smaller box will do just fine and you won't get a hernia trying to load a box of huge weight and size into your truck. Consider 6-8 ft^3 tops here and run some calcs to figure out porting needs.

Swez

PS Anticipate a few internal braces for a box of this size. Will have to take that into account, along with driver and port displacement figures as well.


P0werLifter on 06/1/2005 23:30:39
LoL serious enclosure there, I speak from personal experience, bigger isnt allways better like some people have been lead on to believe. For this current sub I'll run some tests in BassBox 6 Pro and see what i can get out of different enclosure designs.

What are u going for here? SPL? SQL? what? If u want SPL i can design the enclosure to speak at high lvl's but it will not have the flat response curve most prefer in a sound system. If you would prefer SQL or SQ i can tailor the enclosure to provide the flattest response curve.

Also, whats the largest dimensions this box can be for your automobile, keep in mind the weight factor. I currently have a 8^ ft enclosure for a single 15 and it easily weighs 300lbs+. Unless your a powerlifter, or have alot of friends that wont mind helping, try to design something smaller. Also keep in mind,,,, more weight in ur auto, more gas and power it takes to get it moving.

Let me know

-PL

swez on 06/2/2005 00:53:35
An extra 200 lbs over the rear axles will help with traction in the winter snow months. Other than that feature, bigger is not always better.

Thanks for jumping in PL... this on is right up your alley. Big boxes that go boom boom boom. GRIN

Swez

ssallstar598 on 06/2/2005 01:43:34
well ive got ALOT of room (87 s10 blazer) its got a small engine (2.8 liter V6) but im not worried about gas mileage

well im not sure what i want... by flat response curve what do you mean? im still trying to learn about enclosures IM GUESSING SQL because i dont want a 1 hit wonder its for daily driving (although sketch one up for SPL anyways... might build it for when i go to a comp)

ALSO i plan on building it myself...


the only thing i do not like about this sub though is ima hafta get a new amp.... X_x my JBL b600.1 will not run it well at 4 ohms and i dont trust it at 1 ohm... i was looking into either a US amps.... wanting 800x1 @ 1 ohm otherwise ill check into a hifonics


swez on 06/2/2005 14:17:21
The earlier JBL BP 600.1's were stable at one ohm. If you choose to use it, just make sure you monitor the amps temperature. Long periods of use at 1 ohm and full power will generate some heat there bud. Heat is the worst enemy of electronics components and circuitry.

Also, they were a bit under rated for power as JBL used 12.9 volts as the source for 600 Wrms @ 1 & 2 ohm loads. At 14.4 volts, can anticipate ~10% higher wattage performance. (650 Wrms or so)

Swez

ssallstar598 on 06/2/2005 22:00:54
well - the model i have i asked JBL about in an email and they said it is not 1 ohm stable (even though it says it in the manual) they found that it overheated while ran at 1 ohm VERY quickly



swez on 06/3/2005 10:07:27
OK, better safe then sorry here. Guess JBL should know enough about their amps to know what does and does not work.

Swez

ssallstar598 on 06/3/2005 12:36:31
i just finished cleaning all the junk out of my blazer... (it was slap full...) im going to try and get some measurements to go by now

swez on 06/3/2005 21:43:39
Talk to the sub maker and see if you can get them to give you a cf recommendation on a box that is ported down to say 30 Hz. Once you know that, the rest is figuring out what H & W dimensions maxes are. The rest will be made up in depth. I would hope you can do this in about 6-8 cf.

Swez

PS That Blazer is gonna rattle like ton of snakes when done.

ssallstar598 on 06/5/2005 18:32:07
yes it already does w/ my ported tempest...

ive got 2 layers of deadening (peel and seal roof flashing) ALL over the vehicle and ive got the panels insulated w/ GREAT STUFF (really works... just really really messy and sticky...)

one of my sunvisors fell off last week... hit me in the head X_x

ssallstar598 on 06/13/2005 16:39:37
hrmzz.... they dont seem to be responding to my email... its been almost a week since i asked them about the tuning and all



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