Tuning Freq. for DD 2512's

[Drunken.Swagger 10+ year member]

I'm designing a box for my 2 DD 2512's and I'm reading all the info I can find, but I'm hoping someone on here has experience and can tell me:

Would a 30Hz tuning frequency have a noticeably lower extension than a box tuned to 40Hz for these subs?

DD says that the subs can play well below the box loading point, but I want to know how true that is. This is going to be a daily driver and I love really low bass so I want to know from someone with experience what the best tuning frequency would be.

Thanks,

-Ryan

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[rc10mike 10+ year member]

sealed

 

[NightDrifter05 10+ year member]

My 3512 does just fine on the low's in my box. Mine is tuned at 38hz.

 

[rc10mike 10+ year member]

My 3512 does just fine on the low's in my box. Mine is tuned at 38hz.

Lows as in what freq?

 

[Drunken.Swagger 10+ year member]

sealed

I ran the pair in 4 ft3 sealed and the low end wasn't any better than the 1 I have in 2.2ish ft3 at 33ish Hz.

 

[rc10mike 10+ year member]

I ran the pair in 4 ft3 sealed and the low end wasn't any better than the 1 I have in 2.2ish ft3 at 33ish Hz.

DD is usually for ported Ill give you that, but when you say "lows" what specific freq are we talking here?

 

[thevic24 5,000+ posts]

dd's dont work well in sealed boxes. the sub will also use the car for loading as well and you could allways make a plexi-glass loading wall for them. i am running a 1508 with about a 35,36hz tuning and it dishes out outstanding lows. playing test tones, its very solid and quite loud down to 27hz.

so i would go for a 35hz or so tuning, you should be happy. what car are they going in?

-vic

 

[Papermaker85 5,000+ posts]

2.25 tuned to 34 would do pretty good.. althought the best alignment for SQ is 2 subes tuned to 32 with 40IN^2 of port area, there a bit inefficient but thats what you get with you want lowered grouupy delay and a flat response...