Pani, I have a First Watt J2. It is an excellent SS amp, but I like my Frankenstein 300b amps better.
The J2 goes deeper in the bass is a little more dynamic and has very good resolution, but compared to my Frankenstein 300b amps the trailing edge is shortened and isn't as liquid sounding. Using a video analogy the J2 is 1080p and the tube amp is 4K. The pixels (grain) are smaller.
I like both, but my Franks are more organic sounding and engaging.
Joe
The J2 goes deeper in the bass is a little more dynamic and has very good resolution, but compared to my Frankenstein 300b amps the trailing edge is shortened and isn't as liquid sounding. Using a video analogy the J2 is 1080p and the tube amp is 4K. The pixels (grain) are smaller.
I like both, but my Franks are more organic sounding and engaging.
Joe