All Comparisons
Nightshade NS-Series NS6 18" 3500W Subwoofer NS v.6

Nightshade NS-Series NS6 18" 3500W Subwoofer NS v.6

Sundown Audio
$1099.99
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VS
SB 10" SUBWOOFER - DVC | 500W RMS

SB 10" SUBWOOFER - DVC | 500W RMS

Down4Sound
$749.99
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Subwoofer Spec Comparison

ParameterNightshade NS-Series NS6 18" 3500W Subwoofer NS v.6SB 10" SUBWOOFER - DVC | 500W RMS
General
RMS Power—500 W