Subwoofer Cab Help

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I HAVE TWO 18" KNIGHT SPEAKERS ,WOULD LIKE TO BUILD NICE SUB CAB FOR THEM . HAVE ON IDEA HOW TO DESIGN CAB , NEED SOME CAB SIZES. THIS IS THE SPEC ON SPEAKER
Model Warrior 18
FS 30hz
VAS 16.89
SD 213.82
Qts 0.746
Qes 0.786
Qms 14.76
BL 15.82
Re 6.73
Ohms 8
Le 461.96u H
Mms 151.13
X max .25"
X mech .5"
SPL 101db
Freq. Res. 28-5000hz
Coil size 3"
Coil type kapton
Cone type paper
surround type accordion
Binding posts clip type
basket type stamp
Magnet size 90oz.
Power RMS 350 watts
Power Peak 700 watts

HAVE BUILT CABS BEFORE ,JUST NEVER DESIGNED ONE.
 
With a SPL of 101dB per watt these drivers are completely out
of the realm of domestic hifi, and will require huge cabinets for
smooth bass, these drivers are designed for mindnumbing SPL
levels that are required in professional PA rigs.

As stated reflex is completely out of the question,
even sealed boxes are going to be very big.

I assume Vas is 17 cuft.

10 cuft will give you a Q of 1.2 and Fb of 50Hz which is on the
limit of useable, 20 cuft gives you a Q of 1 and Fb of 40Hz
which is a much better alignment but 20 cuft is a huge box.

Possibly could be used in open baffles, with a small amplifier,
otherwise simply not suited to domestic use.

🙂 sreten.
 
I WILL BE USING THESE IN A MOBILE DJ RIG , I HAVE BUILT OTHE BOXES . JUST WANTED NICE PLANS FOR THIS SPEAKER . HAVE SEEN PLANS FOR FOLDED HORNS IN FANE BOOK I HAVE, DID NOT THINK THEY WOULD SOUND WELL . WANT A NICE DEEP BASS
GUESS 18" SUBS WILL NOT DO IN ANY TYPE OF ENCLOSURE.

IF ANYONE CAN HELP WITH ENCLOSURE TYPE ,AND PLANS WOULD HELP
 
like I said for high efficiency you need big boxes, volumes in litres :

(Its the Q of the drivers that is the problem)

🙂 sreten.
 

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