All Comparisons
Power Pack: 2 VFL 10 D4 Subwoofers + VFL Stealth 5500.1D Amplifier

Power Pack: 2 VFL 10 D4 Subwoofers + VFL Stealth 5500.1D Amplifier

American Bass
$554.51
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VS
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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Subwoofer Spec Comparison

ParameterPower Pack: 2 VFL 10 D4 Subwoofers + VFL Stealth 5500.1D AmplifierDown4sound PRO-FAB Birch FLAT PACK 12 | 1 12 Sub Box | DIY 12-Inch Ported Subwoofer Enclosure Box
Electromechanical
Fs (Resonant Frequency)—32 Hz
Physical / Acoustic
Vas (Eq. Compliance)—68 L
Sd (Cone Area)—165.1 cm²