Samson A35 - Manual (Page 11)

9
Your A series amplifier features a CD input which you can use
with a portable CD player, cassette, mini disk or MP3 player to
jam with pre-recorded tracks or learn a riff from a favorite tune.
In fact, you can plug any line level signal into the CD input
including the signal from a keyboard or drum machine. Connect
the CD player or other Line level device to the CD Input using
standard RCA cable. You will want to use the volume control on
the CD player or other Line level device to set the balance
between the track and your bass. So, start with the volume con-
trol all the way down and slowly raise it until you reach a good
balance with your bass.
Using the CD Input