DD 1508 T/S parameters

[type[s5] 10+ year member]

Anyone know them? DD's website doesn't have them listed for the 8's and I don't wanna wait till tomorrow to get the info from my local DD dealer. I wanna go out and buy some MDF already!

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[lilmaniac2 5,000+ posts]

i got em 1 sec

 

[Louisiana_CRX 5,000+ posts]

I haven't a clue but tell me what your trying to do with them and I'll see if I can help you with a box....

 

[Louisiana_CRX 5,000+ posts]

Chad should be able to help //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[lilmaniac2 5,000+ posts]

DD 1508 SVC 4 ohm

Revc = 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

 

[tapout 5,000+ posts]

edit, chad got it.

 

[tapout 5,000+ posts]

BTW, nvm

 

[Louisiana_CRX 5,000+ posts]

multiple drivers like smaller boxes //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[lilmaniac2 5,000+ posts]

helped measure them myself //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[type[s5] 10+ year member]

I'm trying to prepare for a comp coming up on Oct. 21st... I was suggested by our local DD dealer to make a box tuned to 45hz (he didn't specify cubes) but I wanted to try to figure out what would be best, myself. It's gonna go into a '91 corolla sedan trunk that gives me, at most, 3 cubes to play with, i believe. I've got 2 1508's to play with and hopefully I get my cadence zrs10 from CA.com by the 21st (I'm currently amp-less). Right now, they're in a 2 cube box tuned to 40Hz.

After playing tones in their current box from 30-60Hz, I notice good "by-ear" responses on 32hz w/out vibration from the car. Once I hit 40-55hz, I can hear it get louder but I'm getting a ton of vibration from the car. So now i'm wondering how to approach the situation with the time I have left til the 21st. Sound dampening the trunk fully and keep my current box, or build a bigger/higher or lower-tuned box and leave just my trunk lid deadened?

 

[type[s5] 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

Thanks man! I'll see what I can come up with now. But if anyone read my last post before this and thinks they can help, feel free to send me a PM or reply to this post.

 

[Louisiana_CRX 5,000+ posts]

If it is 2 cu ft total counting the port they should be fine...I run mine tuned at 40hz...16 sq inch port per cu. ft

 

[type[s5] 10+ year member]

If it is 2 cu ft total counting the port they should be fine...I run mine tuned at 40hz...16 sq inch port per cu. ft

Alright... yes my box is 2 cubes, port included.

I'll play around w/ the T/S params anyway but I guess I'll keep my box the way it is and concentrate on deadening the trunk as much as possible before the comp.

 

[snouk dogg 10+ year member]

What about xmax, does anyone know about it?

 

[B_Campbell 10+ year member]

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