Ground Zero GZIW 200X-II
Ground Zero GZIW 200X-II
Model

Ground Zero GZIW 200X-II

Rating
DIAM
8"
FS(Hz)
38.4
VAS(l)
27
QTS
0.48
PWR(W)
300
SPL(dB)
86.5
IMP(Ohm)
4x1
avb
PROD

+130 vpeti89

12 Apr 2020, 21:16

Description

I used the woofer's stock parameters from SBL database and Pe = max power. I tried to simulate all other types of boxes too, but this 6th order bandpass basically pulls the most out of this woofer (deepness / loudness), and matching my needs too: ideal power handling down to high 20ish frequencies, no negative peak around the low Fb, acceptable group delay at 20 Hz and higher frequencies, and the compactness is acceptable too.

Enclosure

BP6, Vbfront: 9.6l, Fbfront: 35.7Hz, Vbrear: 3.2l, Fbrear: 170.8Hz

+130 vpeti89

13 Apr 2020, 11:37

Description

In this project I simulated all boxes from woofer's original datasheet: https://www.ground-zero-audio.com/wp-content/uploads/GZIW-200X-II-1.pdf using the stock parameters from SBL database (for boxes: same Vbs and approx. the same vent areas + lengths like in datasheet). The differences are the same like in the simulations on the datasheet, and the results are just a little bit different, so I can say: SBL's accuracy is really acceptable. For boxes: just power handling and vent air velocity are not so good.

Enclosure

BP4, Vbfront: 15l, Fbfront: 67.3Hz, Vbrear: 15l