PDA

View Full Version : Need a box design for 8's



got_focus?
06-19-2009, 01:37 PM
Specs -

FS=47.75Hz
Qms=7.334
Qes=.552
Qts=0.514
Vas=0.376 cu. ft.
Re=2.653 ohms
Le=0.157mH
Spl=85.22 @ 1w/1m

Max dimensions -

40" Wide, 18" Tall, 12" Deep

Layout -
http://i41.tinypic.com/2cgisuc.jpg

From the little I played around, the box would be best tuned to 41hz due to the 47.75hz Fs. I would like to tune in the low 30's if possible.

Hit me up on AIM under BumpnGT

iamamp3pimp
06-19-2009, 02:12 PM
seks

got_focus?
06-19-2009, 02:16 PM
butt seks

Sorry, I only pitch.

mmouse57
06-19-2009, 03:49 PM
well you ahve 3.86cf to work with internal area so can make most 15's fit if the 8's dont do if for you :)

got_focus?
06-19-2009, 09:08 PM
Problem is that I have the 8's and really want them to work, LOL.

Love using small speakers and getting away with it!

I would like to get as much SQ out of these little guys as possible.

GAM3OVR
06-19-2009, 09:23 PM
hmm, I wonder which 8's these would be :p:

SPY
06-20-2009, 02:05 AM
T-line

ciaonzo
06-20-2009, 02:07 AM
T-line

This.

Especially considering the Qts.

Use as little stuffing as possible in the line to keep it somewhat efficient but at the same time tame the impedance.

This requires that you have actual line length to support the lowest frequency you wish to reproduce.

It can be somewhat shorter if you taper the line and reduce the terminus to about 80% of the Sd.

got_focus?
06-20-2009, 11:47 AM
Hmmmmmmm, maybe T-Line IS the way I should proceed in this project!

80INCHES
06-20-2009, 12:13 PM
the q is not low enuff for a t-line
most good t-lines have low q subs in them
80

got_focus?
06-20-2009, 12:17 PM
LMAO....


80, hit me up with the box that will give me the best frequency response, SQ oriented.

iamamp3pimp
06-20-2009, 12:57 PM
he would be the one to talk to.

:)

ciaonzo
06-20-2009, 01:33 PM
the q is not low enuff for a t-line
most good t-lines have low q subs in them
80

It is true that a TL will sound the best with a lower Q driver but as long as line area is not too large, it will be far more forgiving and will extend a great deal deeper in frequency than trying to stuff a driver with a Qts of .514 into a vented enclosure tuned somewhere in the 40's as he was contemplating.

Line area is most strongly correlated with the Vas of the driver but given proper consideration it will also keep high Q drivers in good behavior when the line is properly stuffed.

ciaonzo
06-20-2009, 01:53 PM
LMAO....


80, hit me up with the box that will give me the best frequency response, SQ oriented.

Is it a safe assumption that I do not need to donate my time by continuing on with my figures?

got_focus?
06-20-2009, 05:03 PM
Is it a safe assumption that I do not need to donate my time by continuing on with my figures?

Continue with the design please. I will be building both a t-line and 4th order to see which I like better.

ciaonzo
06-21-2009, 11:04 AM
Would you like the drivers mounted on the 12" dimension or the 18"?

got_focus?
06-21-2009, 12:31 PM
Either is fine, I'm not going to complain!