Transistor technology and lamp
I had to buy an extension for the power Racker
Extensive connection that lets you do many things.

UTILIZATION

For a small mono amp can be configured quite complicated things, such as using both TRS and XLR inputs for finding an interesting tonal balance.

SOUND QUALITY

Personally I do not really use the lamp circuit which introduces a little unnatural thing (to my ears). The transistor circuit is against great heat, softness and definition I use for guitars, bass, vocals. Compared to Bae 1073Mp I find it very good except a little lack of punch, but for the price it is fine.

OVERALL OPINION

I use it for four years now. I bought it to make supplements taken home for records that had started on a big Neve console in the studio. Before I worked on a Motu 828mk2.
What I like most is the sound, and setting options
What I do not like is the finish is not great. Taking XLR input has always bugged me since I got it.
Very good quality / price ratio.
I would do the same choice