Specifications
ENCLOSURE RECOMMENDATIONS
woofer-displacement:
box type optimisation for: loud normal low / definition
sealed net box volume [Liter] * 20 35 100
free field SPL at 90 Hz [dB/Wm] 87,7 87 86,5
mech. power handling [Watt RMS] 200 200 150
low cut frequency (free flield) Flow [Hz] 42 37 28
vented net box volume [Liter] *+** 35 50 80
port diameter x length [cm] 10 x 24 10 x 22 10 x 22
free field SPL at 90 Hz [dB/Wm] 91,5 90,1 88,5
mech. power handling [Watt RMS] 150 120 100
high cut frequency for subsonic filter[Hz] 35 32 27
power handling with subsonic filter [W] 250 250 200
low cut frequency (free flield) Flow [Hz] 45 34 25
single vented band pass net box volume [Liter] * V1 12 18 28
net box volume [Liter] ** V2 20 20 20
port diameter x length [cm] in V2 12 x 18 12 x 26 12 x 36
free field SPL at 90 Hz [dB/Wm] 92 90 87,6
mech. power handling [Watt RMS] 250 200 150
low cut frequency (free flield) Flow [Hz] 46 37 30
V 1 V 2
double vented band pass net box volume [Liter] * + ** V1 - 30 -
port diameter x length [cm] in V1 7 x 38
net box volume [Liter] ** V2 23
port diameter x length [cm] in V2 12 x 20
free field SPL at 90 Hz [dB/Wm] 91
mech. power handling [Watt RMS] 200
high cut frequency for subsonic filter[Hz] 24
power handling with subsonic filter [W]
250
V 1 V 2 low cut frequency (free flield) Flow [Hz] 35
*): add additional 1,5 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: 233 mm
mounting depth: 117 mm
magnet diameter: 134 mm
recomm. freeplay behind magnet: > 20 mm
if flange gets lowered into baffle: without -
grinding diameter: 258 mm
grinding depth: 9 mm
ALPINE SWE-1044E 25 cm Subwoofer
1,5 Liter