It is a transistor amp originally planned for Basses.
There are 2 entrances bass / guitar line input, a headphone output.
The power is given to 20 watts.
There are volume, treble, mid, bass and presence.
Usage is simple.
The sound is very bad.
No manual supplied with, at the time I wanted to What was the presence button??
This is an amp that I had been sold in mammoth as a guitar amp.
But removing a small blue sticker next to the logo BA-20 I saw there was written qu'l Bass.
So I think it s is a bass amp.
So I played with a guitar over (millnot MSM's) and there was a horrible. So I bought a distortion pedal Shred Master (for no effect) to play the song that I liked at the time (Nirvana, Punk metal).
So I sold in '98 to buy a Marshal Vavelstate VS65R, and then I finally got to play with a good sound.
I have a score of 2 because I had a distortion pedal, otherwise I would have been 1.
I used this amp 3 years, it is up to you disgusted sound.
I recommend very highly.
I did nothing in this amp, even the outline of carpet was so horrible.
Flee you fools.