ENCLOSURE RECOMMENDATIONS
woofer-displacement:
box type
optimisation for:
loud
normal
low / definition
sealed
net box volume [Liter] *
-
25
34
free field SPL at 90 Hz [dB/Wm]
-
89,5
89,2
mech. power handling [Watt RMS]
-
200
200
low cut frequency (free flield) Flow [Hz]
-
40
36
vented
net box volume [Liter] *+**
32
32
55
port diameter x length [cm]
10 x 26
7 x 21
10 x 34
free field SPL at 90 Hz [dB/Wm]
92
90,3
89,5
mech. power handling [Watt RMS]
200
200
230
high cut frequency for subsonic filter[Hz]
28
25
24
power handling with subsonic filter [W]
300
300
300
low cut frequency (free flield) Flow [Hz]
42
35
27
single vented band pass
net box volume [Liter] * V1
-
19
30
net box volume [Liter] ** V2
-
19
18
port diameter x length [cm] in V2
-
2 pc. 10 x 34
3 pc. 7 x 39
free field SPL at 90 Hz [dB/Wm]
-
91
88
mech. power handling [Watt RMS]
-
250
250
low cut frequency (free flield) Flow [Hz]
-
36
27
V 1 V 2
double vented band pass
net box volume [Liter] * + ** V1
25
37
45
port diameter x length [cm] in V1
7 x 32
7 x 25
7 x 36
net box volume [Liter] ** V2
24
23
23
port diameter x length [cm] in V2
2 pc. 10 x 20 2 pc. 10 x 27 2 pc. 10 x 36
free field SPL at 90 Hz [dB/Wm]
93,3
91,6
90
mech. power handling [Watt RMS]
250
250
275
high cut frequency for subsonic filter[Hz]
22
22
15
power handling with subsonic filter [W]
300
300
300
V 1 V 2
low cut frequency (free flield) Flow [Hz]
43
34
26
*): add additional 2,8 L for woofer!
**): calculate and add volume displacement of port(s)
formula: outer diameter [dm] square times 3,14 devided by 4, times length [dm]
ports should be rounded (aeroports)! In cases where round tubes don't fit,
channels with same cross-section (rounded at both ends) may be built.
damping: sealed encl. Fill loosely with poly-padding, vented encl.: 2 walls covered by acoustic foam.
enclosure wall thickness: MDF/Multilayer: 19 to 22 mm. Woofer screwed by metric thread knock-in nuts.
Subsonic-Filter: high pass filter of 3rd order or higher
mounting size:
mounting hole diameter:
282 mm
mounting depth:
169 mm
magnet diameter:
156 mm
recomm. freeplay behind magnet:
> 20 mm
if flange gets lowered into baffle:
without -
with rubber gasket
grinding diameter:
306 mm
312 mm
grinding depth:
14 mm
16 mm
ALPINE SWE-1243E 30 cm Subwoofer
2,8 Liter
130.com.ua
Autogood products internet store http://130.com.ua
