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Matei Alin 18th January 2011 04:56 AM

help with bandpass dimensions
 
Hy guys can you help me with the dimension for a 4th order bandpass enclosure.
And what is the correct cutoff frequency, i`m thinking at 200hz?

Monacor - Romania

palesha 18th January 2011 09:54 AM

Quote:

Originally Posted by Matei Alin (Post 2437498)
Hy guys can you help me with the dimension for a 4th order bandpass enclosure.
And what is the correct cutoff frequency, i`m thinking at 200hz?

Monacor - Romania


Will need the driver specifications to go ahead.
If u want 200 hz cut off on higher side ( i assume) then the lower side cutoff will be from 80~100 hz normally.

Matei Alin 18th January 2011 12:35 PM

the driver specification are in the link. but i`ll post them here to. I`m refering at the cutoff frequency for the subwoofer.
It`s dual coil
Impedance (Z)2 x 8Ω
Resonant frequency (fs)23Hz
Max. frequency rangef3-2,000Hz
Rec. crossover freq. (fmax.)1,000Hz
Music power2 x 250WMAX
Power rating (P)2 x 120WRMS
SPL (1W/1m)91dB
Suspension compl. (Cms)0.85mm/N
Moving mass (Mms)68g
Mech. resistance (Rms)3.2kg/s
Mech. Q factor (Qms)3.03
Electr. Q factor (Qes)0.26
Total Q factor (Qts)0.24
Equivalent volume (Vas)290 l
DC resistance (Re)2 x 6.3Ω/3.2Ω
Voice coil induct. (Le)2 x 1.0mH/1.0mH
Voice coil diameter 50mm
Voice coil former aluminium
Voice coil winding height16mm
Air gap height8mm
Linear excursion (XMAX)±4mm
Eff. cone area (Sd)495cm2
Volume displacement (Vd)198cm3
Force factor (BxL)10.3Tm
Reference efficiency (No)1.3%
Magnet diameter156mm
Magnet weight1.4kg
Mounting cutoutŲ 280mm
Mounting depth140mm
DimensionsŲ 306mm
Weight4.0kg
Rec. net cabinet volume
Closed38 l
Bass-reflex72 l

Thawach 18th January 2011 01:18 PM

quickly to simulate and still don't see any details i post the link to download cab design. Matei Alin high freq cut off about 100-150 is better than 200 hz

monacor.rar

Matei Alin 18th January 2011 01:35 PM

The size isn`t a issue for me. And the port diameter is? Tnx (is this the best size) in bass box 6 it give me v1= 30l v2 = 27l.

What about this
http://img210.imageshack.us/img210/9769/capture2gq.png
Uploaded with ImageShack.us

http://img11.imageshack.us/img11/9799/capture1vy.png
Uploaded with ImageShack.us

http://img209.imageshack.us/img209/9453/captureug.png
Uploaded with ImageShack.us

Thawach 18th January 2011 07:54 PM

i don't sure the bass box 6 count the length of port with the two flare ends. about the flare port design,u can read this website they also have flare port calc to download.

Port Flares

Matei Alin 18th January 2011 10:46 PM

uokey, tnx, i`ll build this :), tnx a lot :*


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