EL34 vs EL34L vs KT77 Marshall jmp

Sound comparison of JJ EL34, EL34L and KT77 in a marshall jmp50W.
The EL34L is an EL34 with a bit more power, the KT77 is a beam power tetrode instead of a pentode. Does it make a lot of difference? Draw your own conclusions...
Marshall settings: pretty clean preamp, power amp clipping. In this zone, power tubes are more likely to reveal their character. I used a homebuilt overdrive to get just a bit more grit. Postprocessing: subtle eq. & a tiny bit of room reverb.
The LP special was recorded with exactly the same knob settings.

Check http://www.broekrock.nl/hosenlander/ for my guitar related tech info pages
Check    • Softclipping overdrive using the Spin...   for my softclipping demo using the Spin Semiconductor DSP