DD 1508 T/S parameters

[type[s5] 10+ year member]

see thats what I am afraid of the low end output form these woofs, mainly 30-35hz

The low end is pretty loud to me, even when tuned @ 40hz.

Yea, does anyone know what Xmax is on these?

 

[adas Pro Seller]

The low end on these is crazy.....expecially for 8" subs, and even when I'm tuned at 40hz with 36sq. in. port for 3, songs like white girl POUND

 

[duece212 5,000+ posts]

see thats what I am afraid of the low end output form these woofs, mainly 30-35hz

The low end isn't bad, pretty suprising for 8's tuned to 37-40

If you want to hear it first hand I know where you can get a pair for cheap //content.invisioncic.com/y282845/emoticons/biggrin.gif.d71a5d36fcbab170f2364c9f2e3946cb.gif

 

[snouk dogg 10+ year member]

Stupid question but is it safe to tune to let's say 40 when the FS is 52?

 

[type[s5] 10+ year member]

Stupid question but is it safe to tune to let's say 40 when the FS is 52?

Umm Fs is actually 30hz.

 

[snouk dogg 10+ year member]

DD 1508 SVC 4 ohmRevc = 3.6943 ohms

Fms = 52.0803 Hz

Zmax = 44.8851 ohms

Qes = 0.7747

Qms = 8.6373

Qts = 0.7109

Le = 3.7049 mH (at 1 kHz)

Diam = 165.1000 mm ( 6.5000 in )

Sd =21408.3884 mm^2( 33.1831 in^2)

Vas = 4.5034 L ( 0.1590 ft^3)

BL = 14.5155 N/A

Mms = 135.0167 g

Cms = 69.1681 uM/N

Kms =14457.5410 N/M

Rms = 5.1152 R mechanical

Efficiency = 0.0772 %

Sensitivity= 80.8920 dB @1W/1m

Sensitivity= 84.2477 dB @2.83Vrms/1m

Maybe your right but when I enter those parameters into Winisd, I get 52hz.

??? I'm clueless ???

 

[newusername 10+ year member]

Maybe your right but when I enter those parameters into Winisd, I get 52hz.
??? I'm clueless ???

Those measurements Chad provided were taken by himself, so either he is thinking of the wrong model or DD has serious quality control problems.

 

[type[s5] 10+ year member]

Those measurements Chad provided were taken by himself, so either he is thinking of the wrong model or DD has serious quality control problems.

Well correct me if i'm wrong, but I don't think Fms and Fs are the same?