Homebrew amplifier with 4 x 6146 tubes, outlet is around 200 watts nominal power. 

The Studio we use sins 2006.
I have worked on the studio for 4 months it’s fully isolated for sound heat and cold
There is a nice heater in it so in the winter I still having a good time there
I also use lots of equipment to get the music nice and heavy on the radio played
The following stuff I use

• Receiver is a frg 7700 and I also use a tube radio from aristona this one gives deep bass

• Behringer  dx 1000 7 channel mixer

• 2 cd players from Philips

• 1 minidisk player from sony

• A big computer with thousands of mp3 files 

• Yamaha rev 100 voice effects

• Behringer compressor limiter

• Behringer snr 202 to quit the high audio tones to avoid splatter