Simple

[allard6]

My only AD experience is AD140, I do not know how to compare a 30 tone, but I imagine it is very different due to many reasons.

[Les Paul Lover]

3 main difference:

- Bigger transformers and more watts = more low end and higher headroom (cleans can be much louder)

- EL34 vs EL84 - the AD140 has a more brutal crunch at hand.

- with the valve rectifier, the AD30 is more compressed, and has more sag. With a solid state rectifier, the AD140 is much tighter.