This is the older version and is a great sub for the $ The newer version is no slouch and worth the money . I have the 10" version DVC4 and slamms very nicey in 2.0 at approx 33 htz. ran on a Hifonics VII Hurcules for a bit and an Autotek Mean machine 99 in a Bazooka tube it did pretty well also(save space and light weight and ported in a co. truck for some bass)
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