yep.
I do this mod to D104's and have for a while now.
it works great, and really opens up the bass response.
I will say however, that the gain is a bit less than the stock two transistor amp.
It has never been a problem, but if you are someone who is used to the sound of a cranked D104, then you will notice it doesn't get as loud.
as far as voice articulation and fidelity, i get more compliments with this setup in my silver eagle than i ever did before.
LC