View Full Version : help with sealed box its been long time for sealed

02-25-2009, 10:45 PM
I cant remeber the last time I built a sealed box got a few?

is this the outside measurements of the box or the inside

It says to build the box to .365 cubes sealed

so that would be 10" by 10" by 6.3" right or do you add for the sub

this is for a 8in polk marine speaker going in a boat

these are the specs I have

Parameters MM840SVC
Type 8" (203.2mm)
Frequency response 26-200Hz
Fs (Hz) 35Hz
Re 3.25 Ω
Le 2.3mH
Qms 5.5
Qes 0.7
Qts 0.6
Vas 0.54ft3
Sd 35.65in
Sensitivity 89dB
Oneway/Excursion 3/4"
Voicecoil Diameter 1 1/2"
Mounting depth 4"
Mounting Diameter 7 1/16"

02-25-2009, 11:49 PM
Those are inner dimensions.

02-26-2009, 12:17 AM
yes inner