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hatemonger
07-13-2008, 01:06 PM
came across some cerwin vega IT-8.0 subs. thinking of experimenting a little. i've always used sealed boxes for 8's, but i want to try porting these just for sh!ts. i was thinking .75 per sub tuned to 40 hz. or maybe i should tune lower? i'm thinking i probably should raise tuning just a little to get a little louder. this is a possible feeler build in prelude to building a system with 4 dayton REF 8's.

hatemonger
07-13-2008, 01:20 PM
i forgot.the subs are 200 watts rms a piece. :laugh: i'm an idiot. i just picked up the sub out of the box and found more paper work. it's telling me to tune it to 35 hz in 1.25^3. seems a little large for an 8, but i guess that's what i'll do. so for 2 i'd need 2.5 net space. i think i'll do 2 3" round ports about 10 1/4 inches long. it still seems like a very large box for 2 8's. maybe not. haven't actually seen any ported 8's. other than prefab internally powered junk.

kovemaster559
07-13-2008, 01:22 PM
i hate 8s they are nice in a small install for people who want just a small amount of bass. like rock

dumpin907
07-13-2008, 01:23 PM
how do you calcualte port area using aeros?

hatemonger
07-13-2008, 01:28 PM
i hate 8s they are nice in a small install for people who want just a small amount of bass. like rock

i'm about to find out. i've heard both sides and want to find out for myself. i have heard sealed 8's that sounded nice, but lacked output badly. i wish i could post the frequency response chart so someone could help me understand what it means. the peak of the curve is at 35 hz @ 1 db. it then drops a little down to -5 db and straight lines at that through to 500 hz.

EDIT: says that it was in the 1.25 net/1.34 total when charted

duece212
07-13-2008, 01:31 PM
8's can be fun man. 1.25 sounds like alot for an 8 but I guess it depends on the driver. My re8's ran in .5 cubes ported each and my dd1508's were around 1 cube ported each. Higher tuning is definately gonna get you more output outta the 8's. If the paperwork says to try 35 I'd try that, not sure I'd go any higher.

scarolinablazin
07-13-2008, 01:32 PM
i hate 8s they are nice in a small install for people who want just a small amount of bass. like rock

yea cause no1 has ever hit a 50+ with 8's right??? ur stupid

pjvoc
07-13-2008, 01:32 PM
i hate 8s they are nice in a small install for people who want just a small amount of bass. like rock

ive heard 8s louder than joo :eek:

hatemonger
07-13-2008, 01:34 PM
8's can be fun man. 1.25 sounds like alot for an 8 but I guess it depends on the driver. My re8's ran in .5 cubes ported each and my dd1508's were around 1 cube ported each. Higher tuning is definately gonna get you more output outta the 8's. If the paperwork says to try 35 I'd try that, not sure I'd go any higher.

they recommend the same tuning frequency for the same model 10, 12 and 15 as well. box size obviously changes. if my math is right, 2 8's should have cone area comperable to a single 12. so there is potential.

duece212
07-13-2008, 01:37 PM
Only one way to find out, thats half the fun anyway.


i hate 8s they are nice in a small install for people who want just a small amount of bass. like rock

wrong

hatemonger
07-13-2008, 01:40 PM
i have a box that i built for a single 12. i haven't put a baffle on it yet, so i could use that. to fit them, i would have to do an upside down "v", and slightly face the subs toward each other. would that cause cancellation? it's hard to explain in words, but the box is downfired. i left the baffle out of the build so i could slide it up or down, depending on what box size i need. with 8's i would have to "v" the baffle, or angle it a little to get enough area to fit them.

kovemaster559
07-13-2008, 01:45 PM
yea cause no1 has ever hit a 50+ with 8's right??? ur stupid

ahahah yeah! UR stupid as well.

kovemaster559
07-13-2008, 01:46 PM
Only one way to find out, thats half the fun anyway.



wrong

let me rephrase that. depends on the 8s Ive seen some that killed my 1 15 setup. but generally 8= thumbs down.

hatemonger
07-13-2008, 01:47 PM
ahahah yeah! UR stupid as well.

i think they're questioning whether you've even heard 8's, other than a bazooka bass tube.

hatemonger
07-13-2008, 01:48 PM
let me rephrase that. depends on the 8s Ive seen some that killed my 1 15 setup. but generally 8= thumbs down.

which 8's killed your 15? serious question, as i am doing an 8 build.

kovemaster559
07-13-2008, 01:52 PM
which 8's killed your 15? serious question, as i am doing an 8 build.

i dont remmebr what brand but it wasnt a dd, it was a cutom built 8. he had it in a mini cooper. it sounded good and loud, i was like dam . he didint want to bass race me tho. he figured id win but beat me by .3 dbz

duece212
07-13-2008, 01:52 PM
i think they're questioning whether you've even heard 8's, other than a bazooka bass tube.

DD1508's got downright loud, but were on about 600w each tuned to 38 and they kinda sounded like poo

Soundsplinter rli8's on about 400 each got loud and sounded **** good doing it.

Re8's are fun if you run alot of them

8's are fun

hatemonger
07-13-2008, 01:56 PM
DD1508's got downright loud, but were on about 600w each tuned to 38 and they kinda sounded like poo

Soundsplinter rli8's on about 400 each got loud and sounded **** good doing it.

Re8's are fun if you run alot of them

8's are fun

i looked at all of those. i'll give them a second look though. i was seriously eyeing the dayton ref 8's. 4 of those. i have 1400 rms @ 4 ohms to work with right now. the plan is to build a false floor with the enclosure downfired in my extended cab. i need to do either 8's or shallow 12's to feasably create a low enough false floor to make it usable.

duece212
07-13-2008, 02:00 PM
i looked at all of those. i'll give them a second look though. i was seriously eyeing the dayton ref 8's. 4 of those. i have 1400 rms @ 4 ohms to work with right now. the plan is to build a false floor with the enclosure downfired in my extended cab. i need to do either 8's or shallow 12's to feasably create a low enough false floor to make it usable.

http://www.parts-express.com/pe/showdetl.cfm?partnumber=295-456

Those ones? Looks like those could be fun

hatemonger
07-13-2008, 02:03 PM
http://www.parts-express.com/pe/showdetl.cfm?partnumber=295-456

Those ones? Looks like those could be fun

yep. those are it. i have these 2 little cerwin vega's that i'm doing as sort of a feeler before i spend 400$ on 8 inch subs.

kovemaster559
07-13-2008, 02:20 PM
i think the guy who beat me was using either SI cause he was good friends with doeg stockon(si rep) or was using a brand called ultra but the woofer was unbadges. all he told me was the motor was huge and it was custom built he was using about 1000 rms.

hoxie08
07-13-2008, 02:23 PM
i cant wait till one day i can afford a buddy for my 1508... then i can run them at 2 ohms.

hatemonger
07-13-2008, 02:24 PM
i cant wait till one day i can afford a buddy for my 1508... then i can run them at 2 ohms.

how much for the dd? link to where i can buy?

plushDJ
07-13-2008, 02:29 PM
Re8's are fun if you run alot of them

8's are fun

I agree. Check my ava :D

ThatChevyGuy
07-13-2008, 02:31 PM
those dayton 8's are probably gonna be rediculous. My buddy cnote had 2 10's in .65 cube sealed boxes behind each seat on a pg 1400w amp and it was LOUD.

hatemonger
07-13-2008, 02:33 PM
I agree. Check my ava :D

ahh. you've done exactly what i'm doing. maybe with different subs, but you know first hand. you have them all in 1 chamber? because of the way my build is, my box needs to withstand some weight. i'm thinking a dual chamber to solidify it a little.

hatemonger
07-13-2008, 02:35 PM
those dayton 8's are probably gonna be rediculous. My buddy cnote had 2 10's in .65 cube sealed boxes behind each seat on a pg 1400w amp and it was LOUD.

i like the straight forward, no bull ***** look of their subs. they look solid and i would bet they put more money into how they sound more than how they look. by coincidence, they look like ***.

plushDJ
07-13-2008, 02:44 PM
ahh. you've done exactly what i'm doing. maybe with different subs, but you know first hand. you have them all in 1 chamber? because of the way my build is, my box needs to withstand some weight. i'm thinking a dual chamber to solidify it a little.

yeah man, one chamber. It sounds good and gets decently loud. I'm guesssing LOW 140's at peak.

hatemonger
07-13-2008, 03:08 PM
yeah man, one chamber. It sounds good and gets decently loud. I'm guesssing LOW 140's at peak.

looks good. i don't need high spl, but i would like to be loud enough for some bass races. when i'm done testing with the cerwin vega's, i'll probably build a bookshelf system with them.

hatemonger
07-13-2008, 03:12 PM
on a side note. i'll be running these test vega's at 16 ohms. just thought it was mildly interesting.

hatemonger
07-13-2008, 10:39 PM
well. i just installed the 2 8's ported @ 36 hz in a downfired box. 2.2 cubes. have them running @ 16 ohms getting a little more than 350 watts for the pair. they are rated at 200 rms per sub, so it's plenty. they sound really good actually. getting some 8 inch tinsel slap though. lol. cheap subs. output is at least close to a 12. they actually hit pretty **** low. handled some 3 6 mafia well. played a bunch of pantera songs, and love the way they sound. sounded nice playing some stevie ray vaughn also. i can't put my finger on it, but they have a different kind of sound than the 12's i've had. probably need a subsonic filter for these.