Lasonic TRC-9912

Wow, this must be the rarest Lasonic. And it's one of the only mono boxes with 3 speakers. It also has separate bass and treble, Loudness, and both an LED meter and an analog one. And like many Lasonics, there's a switch to choose AC or battery power, in contrast to the vast majority of models that have a built-in switch inside the AC cable input.