zydrix Posted June 1, 2013 Report Share Posted June 1, 2013 I really don't think the HDC3 subs will only like 3 cubes each. They love big boxes. I would do 4-5 cubic ft per 15 an 7-8 cubic ft for each 18. I did just under 3 cubic ft for 1 hdc3 12 an it loved it. My build 98 s10 2.2 3 american bass HD 15s with psi soft parts. (on there way here) atomic at-3000.1 (soon) 146.2 outlaw @39hz., bad alt an bad batt when termed (old 2 12" build) alpine 6.5s in doors infinty 4x6s in dash. clarion cz201 HU. mechman 240a H/O alt stuff i still need. SHCA 2/0 wire SHCA 1/0 to 2/0 adapters Atomic AT-3000.1 Lots of sound deadner new mids an highs, still debating on what to do. A few Deka g31 batts. Link to comment Share on other sites More sharing options...
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