Amp Trouble

the MRV-T230 this amp is  2OHM stereo stable.

if you have 2 or speakers in parallel, the impedence is halved, eg 2 4OHM speakers in parallel make 2OHM, and if these are bridged across 2 channels this means the amp sees 1 OHM per channel, which is over loading the amp especially when you turn up the VOL cos the impedence drops even further making the amp work harder. You should only have 2 or more ohms per channel. impedence is resistence in an AC circuit, the lower the resistence - the higher the current and vice-versa.

in other words if you are running two speakers (4ohm each), put one speaker per channel.Bridging two together over both channels will over heat the amp.

the down side is it wont go as loud.(since the amp sees 8 ohm) youll have to buy another amp to bridge the other speaker.1 speaker per amp

or a cheaper way is to buy two more speakers and then just wire 2 speakers per channel giving four speakers in total of 1 amp running 2 ohm stereo stable. this optiion will go twice as loud.

good luck

also make sure that none of the subs are blown