Model
Blaupunkt GBW120
Rating
DIAM
12"
FS(Hz)
32
VAS(l)
38.6
QTS
0.5
PWR(W)
800
SPL(dB)
85.1
IMP(Ohm)
4x1
avb
PROD
+156 P-Bass
5 Dec 2019, 20:09
Enclosure
Vented, Vb: 81.9l, Fb: 24.5Hz
+15 aaron.oban
20 Jul 2019, 23:53
Description
Blaupunkt lists Fs=32. I measured Fs=39. Enter Fs=39 into the calculator to see how this box preforms. The box is built to function as s side table in my living room . The objectives of the build are: -LOW COST -Use 5/8' plywood I had on hand -F3 close to 35Hz -Form factor my wife would allow in the house. -Moderate SPL -High efficiency so Chinese 100w amp can drive it. So far the SPL is enough. 1.25lb per cubic foot polyfill was needed otherwise too boomy 3 rods side to side for bracing Vent is 3/4"
Enclosure
Vented, Vb: 69.3l, Fb: 33.2Hz
Description
This woofer in this box can sound well down to 20 Hz without passing over X-max @ RMS power, and not passing over X-max above box's Fb @ max power. First I googled out the correct parameters of the woofer, so I put in the correct SD and the usable X-max. Then I find that few people measured and/or recounted all the parameters for this woofer. So I made first a lot of simulations, then I find that this box's VB is the smallest for this FB to be sure to not pass over the X-max at these power levels.