All Comparisons
Down4sound PRO-FAB Birch FLAT PACK 12 | 1 12 Sub Box | DIY 12-Inch Ported Subwoofer Enclosure Box

Down4sound PRO-FAB Birch FLAT PACK 12 | 1 12 Sub Box | DIY 12-Inch Ported Subwoofer Enclosure Box

Down4Sound
$139.99
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VS
U-Series v.2 12" Subwoofer

U-Series v.2 12" Subwoofer

Sundown Audio
$549.99
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Subwoofer Spec Comparison

ParameterDown4sound PRO-FAB Birch FLAT PACK 12 | 1 12 Sub Box | DIY 12-Inch Ported Subwoofer Enclosure BoxU-Series v.2 12" Subwoofer
Electromechanical
Re (DC Resistance)—3.84 Ω
Fs (Resonant Frequency)32 Hz41.33 Hz
Qts (Total Q)—0.441
Qes (Electrical Q)—0.486
Qms (Mechanical Q)—4.75
Le (Inductance)—3.186 mH
Physical / Acoustic
Vas (Eq. Compliance)68 L14.76 L
Xmax (Excursion)—30 mm
Mms (Moving Mass)—358.6 g
Sd (Cone Area)165.1 cm²—
BL (Force Factor)—27.27 T·m
Cms (Compliance)—0.041 mm/N
EBP (Efficiency Bandwidth Product)—85.041
Ideal Enclosure—Flexible (Sealed or Ported)