dd1508 issues?

[rydethaLtrain 10+ year member]

yo, i have a 1508 in a 1cuft. box tuned to 34hz. it sounds great until i really give it some power and then i get the shit sound from it like its dirty or blown, but it's not. i have a rf punch 325.2 bridged powering it and i know it's underpowered but it still flys with the bass boost up. is the box too big? it's really pissing me off any advice would be nice!//content.invisioncic.com/y282845/emoticons/furious.gif.fc81ca146dbff91fede3ed290dbc4f4c.gif

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[KHARPS 10+ year member]

yo, i have a 1508 in a 1cuft. box tuned to 34hz. it sounds great until i really give it some power and then i get the shit sound from it like its dirty or blown, but it's not. i have a rf punch 325.2 bridged powering it and i know it's underpowered but it still flys with the bass boost up. is the box too big? it's really pissing me off any advice would be nice!//content.invisioncic.com/y282845/emoticons/furious.gif.fc81ca146dbff91fede3ed290dbc4f4c.gif

That's probably a bad idea.

 

[Louisiana_CRX 5,000+ posts]

probally not tuned right...32hz for a single 8 is pretty low...i usually tune my 8's at 40hz and have no complaints...

 

[bball09124 10+ year member]

You are probably clipping the hell out of the amplifier rather than the problem being with the speaker.

 

[rydethaLtrain 10+ year member]

probably clipping the amp. anyone against using the bass boost?

 

[adas Pro Seller]

probably clipping the amp. anyone against using the bass boost?

Yes. turn it the F off. If theres one thing I've learn with 1508's sounding good, it's giving them perfectly clean power. Then they're fun

 

[grimreper912003 5,000+ posts]

DD says to tune around 40hz for their subs. your box at 1cu ft needs 15sq in of port are and a port lenght of 18".

 

[oxsign 5,000+ posts]

You are probably clipping the hell out of the amplifier rather than the problem being with the speaker.

+1 mine sound just fine with 500w each.

 

[rydethaLtrain 10+ year member]

DD says to tune around 40hz for their subs. your box at 1cu ft needs 15sq in of port are and a port lenght of 18".

by 15sq in. do you mean the opening? i guess i need a bigger amp then too.

 

[grimreper912003 5,000+ posts]

by 15sq in. do you mean the opening? i guess i need a bigger amp then too.

L x W for port area.

Also is your box 1 cu ft after diaplacement?

 

[rydethaLtrain 10+ year member]

L x W for port area.
Also is your box 1 cu ft after diaplacement?

yup, don't remeber the dim. but i remember that. loaded 1cu.

 

[rydethaLtrain 10+ year member]

hey guys, when youre clipping your amp it sounds like shit, dirty bass right? when you bottom out it makes a whole different sound i'm familiar with, how about when you turn up the bass, then it makes more like a mechanical sound like i can't describe. it seems to have gotten worse over time but the suspension isn't shot, still pretty tight. i thought it was the amp clipping but it sounds more mechanical. any help please!!

 

[Canaan 10+ year member]

DD1508's are VERY over-motored and can be picky about the box they like.

They will bottom out very fast in the wrong box.

I like to go around 0.75cuft tuned around ~38hz.

Also, they like to be loaded against a wall or the floor.

Try a loading wall ~3-4" away from the sub.

 

[lyttleviet 10+ year member]

Like everyone said, your box is tuned way too low and turn off that BB. That should solve your problems. They are great woofers.

 

[gunz4me 10+ year member]

DD1508's are VERY over-motored and can be picky about the box they like.They will bottom out very fast in the wrong box.

I like to go around 0.75cuft tuned around ~38hz.

Also, they like to be loaded against a wall or the floor.

Try a loading wall ~3-4" away from the sub.

Hmm, do you think a pair in a 1997 Civic Coupe would load well in the trunk up against the rear seats but pointed towards the license plate OR should I rethink my build?

I was thinking of doing two 1508 S4s in 1.5 cubes tuned to 40 Hz and giving them about 1,100 watts RMS.

Regardless, the dd1010 that I currently have is kicking *** and taking names!