i believe its a 2 channel and only 2 ohm stable..with subs u got its prolly gonna have to be run at 8 ohms a piece and split to 4 ....it just sounds to me like a bad sub amp match...if im correct on the amp
With two 4-ohm DVC subs, you can wire them to 2-ohms each, and hook each one up to a seperate channel. Or wire each to 2 ohms, and series them for a single 4-ohm load, and bridge the amp. Or wire each one to 8 ohms, and parallel them for a 4-ohm load. Exact same result either way...