sounds like a load problem, ie the amp is seeing a low impedance and going into protect mode,

make sure your amp is not seeing under 3 ohms.

also you should be running at least 50% headroom with amps, so lets say you have 2x600w vibe black air drivers, there is a potential of 1200w. you should be running an amp that delivers at least 2000w to run correctly.

dont think if you run smaller amps into big speakers they wont blow your speakers, it is actually more likely to happen due to early square waves into your drivers, causeing coil destruction..

be carefull mate,, as you know vibe drivers arnt cheap lol

good luck, let me know if you need any help