Cool find, Fran...wish I had found it!
R.
The 300K works real well with the Hammond XK3c/XK1 organs, Russ, and just a few weeks ago, a friend of mine let me play his Hammond XK3c dual manual system through a Yorkville/Traynor K4. The bass was a tad tight, but still acceptable.
These amps are as tough as a bag of horseshoes (and nearly as heavy

) and also make terrific acoustic guitar amplification systems.
They made a Mono Block II Bass Head back in the early 70's that is still highly sought after today.
A great company with really well made and supported products.
Ian