It is an Apex Jr amp plate amp. It is basically the same (at least to my eye) as the 120w PE plate amp. It decieded to bite the dust one day. It still has a thump when turned on and off. Only think that I can think possibly happened to it is a dead short between the leads (however, this is just a possibility). I'd appreciate it if you fine folks would help me trouble shoot , find the problem and fix it. Thanks for any help in advance.