I think they are reliable, i owned 3 cobras and one of them had a problem but it was during shipping and the distribution sent me a new one and told me to send the old one back once the new one arrived. They also paid the shipping both ways for me, i didnt bother going thru my dealer and went to the distributor which was danabgoods at the time, they was awsome. Its too bad its so hard to get a cobra now. Its a great sounding amp with the right speakers and pickups.