how to test amp? blown?

I just got this amp off ebay...MTX600XD ...perfect condition...lights come on, fueses are good....but it just doesn't seem to be amplifying....I don't know. How do I know if I should get my money back? I know I don't have it hooked up wrong....easy setup.

Does the amp have any output at all?   Some MTX amplifiers can be muted by turning the gains all of the way down.  Have you checked to make sure the gains were not all the way down?  Have you checked the plus and minus configuration on the speaker terminals?  Some amps have the speaker terminals Plus Plus Minus Minus.

yeah....everything is hooked up as it should be. And it is playing through the speaker.....but It's not getting very loud at all....I don't thiunk it's working. It's doing about as much as it would if I wired it directly to the head unit...like 35 watts or whatever.....I have such bad luck. How do I test this thing so I know if I can turn this thing sideways and shove it up dudes ass

Do you have a dual voice coil woofer connected to the amp? If so disconnect one of the voice coils and see if it plays loud then.

nope....single coil....and the speaker was fine when I last used it

Well if you know you have good signal getting to the amp, it sounds to me as the amp is bad. If you have the tools necessary to take it apart, I can tell you what to look for just to make sure it is bad before you go and wrongfully turn it sideways.

I just had it apart and everything looked great....I can see no visible burns/breaks etc. Everything looks brand new. I don't get it. Unless they droped it during shipping

Did you remove any of the clamps that hold the transistors down to the heat sink? The power supply transistors could be cracked, but the amp will play with very low output, just as you are describing.

The power supply transistors are the ones nearest the transformer, the round ring with multi colored wires wrapped around it.

no...I think that is beyond my abilities....I don't want to F things up....unless it's easy....got any pics of what you are talking about?

Not of that particular amp. Do you have a digital camera so you can take a picture of the inside of the amp and send it to me?

I have no way to get pics. I tested the sub, and it's working...pluged it in to a buddies system. The amp light is staying red....which is protect mode....it should be green......why is it staying in protect???

Chances are it has shorted output transistors. This problem is not something you can see. You initially said the amp was playing at low volume. It will not play at all if it is in protect. The info about the protect light being on would have saved us both a lot of typing.

well I don't know if it is a protect light. I know they normaly are red in protect, and green in on mode.  This amp doesn't say that. The red light may just mean it's getting power. Wouldn't it say if it were a protect light?  Sorry about that, I could have sworn I said it was on...maybe not