Any amp head, 100 watt lamps with lamps, dual reverb that is an adjustable reverb on each channel (clear and saturation)
Effects loop connects to the back (send and return), can reduce the output power to keep the heat without power (though effective)

UTILIZATION

Config super simple and intuitive.
After one day, after testing and adjustments, is adopted.
It's a basic amp in its design, but he is quick to find a wide variety of colors and heat.

SOUNDS

I play rock, very fat, very big and there is the foot. This amp, it always kills me for 10 years.
I have two guitars: Les Paul and Ibanez jem 777.
The Paul and the JCM is a couple, they are on the same wavelength. Anything goes. The most saturated to crunch huge very big and warm, this amp is beautiful. The harmonics sound, the amp sings, it twists, it's hot almost burning.
I can compare it to two other amps that I bought in parallel, and passion that I have. Mesa Boogie and Carvin, the dux all lamps: I kept one, the JCM 900. And I'm not ready to sell it.
Only flat, clean sounds sound better with the JEM, but with the les paul, it is very pleasant to play tight or small ruthmiques arpeggios with reverb on 7-8.

OVERALL OPINION

Used for 10 years
This is a serious amp that tears
Yes, I have tried many styles by his passion, I bought 2 (see above) and no better.
I paid 8000 F at the time (1200 €) and how they regret?
I do not know what I would search other amp modeling effects? I rest on authentic sounds, mega hot, with an amp that I am screaming and defending itself.