Random loss of power to amp?

[CraigLovelock]

When driving sometimes the power cuts out to my amp.

Somes times when i hit a big bump but also sometimes just randomly cuts out and you can hear the sub kinda pop or w.e

It then randomly comes back on.

However, sometimes it makes like a helicopter noise throught the speakers and the sub keeps going.

Both front comps and sub are on the amp.

Any ideas?

[coalpoolwalla]

bad earth point maybe... hence when going over a bump it cuts out as the earth is moving on whatever its connected to