I have a Vox DA5 with the battery power out of service. I thought it was just a bad connection but that does not seem to be true. I had a good amp tech look at it. He said that he thinks there is a transistor out. He can jump it so the battery works but then the on/off switch does not work. He needs a schematic to get any further.

Does anyone have any ideas?

Thanks,

Carl

I am building a speaker cabinet to use with a Valve Junior (4 ohm output) and a Vox DA 5 (8 ohm output). The speaker I want to use comes in 4 ohm or 8 ohm versions. Is there some way to wire the 4 ohm so it can also be used for the other?

Thanks,

Carl

I want to use a Ruby as a preamp for a Sonic Impact T Amp. Can it be directly connected or will I need some kind of a buffer?

Any help will be appreciated.

I want to build a battery powered amp comparable to a Roland KC 60. It is rated 40 watts and the maximum power on the rating plate is 45 watts. There is no additional information on the Roland site. Is there any way to find out what the RMS power is?

I want to use a Sonic Impact  T Amp to build a battery powered keyboard / mini PA amp similar to the Roland Cube Monitor. The Cube Monitor has 30 watts through a  6 ½" speaker and weighs 11 pounds. The T Amp has 9 watts per channel. I want to use an 8" Eminence Alpha with an SPL of 100.9 so it should be loud enough.

Is there a way to put both channels through the same speaker, or will I need to use two speakers?

Carl