Amplifier works at low volume levels. When volume is turned up it cuts out for a few seconds then there is a click and it comes back on and then cuts out again until the volume is returned to a low level.

Try looking at the rear of the amplifier to see what the speaker load should be...it will be measured in Ohms...you will then want to look at the speakers to see what the impedance is on the speakers...if it is LOWER than what is on the back of the amplifier, then you have an impedance mismatch which is causing the amp to go into protect... If the speakers are in fact the proper impedance then you probably have a bad speaker...you can test this out by disconnecting one speaker and trying it,,,and then the other and so on...another thing to try would be to obtain another pair of speakers with the proper impedance to see if they work...now if you try all this and the amp still cuts out..them there probably is a problem inside the amp...I specialize in Vintage Audio so try these things first...if you have questions feel free to email at [email protected]