New Coincident Frankenstein 300B Stereo Version

Sim,

As you know, you will get a significantly different sonic presentation with the amp you are considering over the amp you are now using. My experience with SET was mixed, BUT the mid range was glorious. Tones sounded lifelike and spatial qualities  were most satisfying. I don’t think you will lose bass but you should get a much different sound. I am not familiar with the amp you are considering and perhaps an audiophile near you might be able to let you listen to his 300B rig.

I actually live in the same city as Israel. I wanted to audition but he told me it's not possible.

I recommend that you contact the manufacturer, Israel, and see if he will let you audition the amplifier. He might even be willing to pay a small fee and shipping for the opportunity. You will never otherwise know.