2 dd 1508's bottom out to easy?

[memphis_vette 10+ year member]

hey guys i got my 2 dd 1508's installed. they are dual 4 ohm with carbon fiber caps. i have them hooked yp to a DD m3. i have some decent power going until they are fully broken in i will put 1k to each ive turned it up a few timd and they bottom out easy. is it just cause they have too much power or box? the box is 1.75 tuned between 35-40 hz. could it be because of the amp tuning? what could help.

Click to read more...

 

[Tw1st3d13 10+ year member]

wait till they break in yo

 

[hatedonmostly 5,000+ posts]

that

 

[corona_jeff 10+ year member]

Is that 1.75 ea or for both?

 

[memphis_vette 10+ year member]

ok well they have about 5 hours of playtime so far. it is 1.75 for both double baflle and counter sunk. with 45's in port

 

[ascitiesburn69 10+ year member]

5 hours of playtime and they still bottoming out? Hmm try setting your subsonic filter a bit higher and how much power are you throwing them? Bc i had an aq sdc10 and it would bottom out ridiculous easy until it was fully broken in then it would play well under tuning with ease.

 

[corona_jeff 10+ year member]

1k ea is not too much power for a 1508. I didnt it daily for months. I would agree check the sub sonic. The box seams fine.

 

[michaellane 5,000+ posts]

i think its the amp settings

 

[Louisiana_CRX 5,000+ posts]

I ran a pair on 1800ms each and they did fine...they probably need to be broke in and the subsonc filter turned up some...usually around the middle is where I set mine.....I'm getting ready to do 4 on a DD M4 so it should be similar power

 

[memphis_vette 10+ year member]

hey guys i checked it out and amp was out of tune. forgot to tune it for new setup. these 8's pound! very impressed

 

[Sir-Lancelot 10+ year member]

i think its the amp settings

This ^

 

[slam 5,000+ posts]

Mine bottomed out too till I shallow the box

 

[Tw1st3d13 10+ year member]

hey guys i checked it out and amp was out of tune. forgot to tune it for new setup. these 8's pound! very impressed

That's what we like to hear post a video

 

[memphis_vette 10+ year member]

ok will do ill shoot a vid 2mro thx for the help

 

[SPLaudio 5,000+ posts]

ur not bottoming them out it is spider noise. dd/aq has a crappy design with many paper thin spiders and it will make noise when pushed hard until broke in. i dont believe the coil can touch the bottom plate...