Dan D'Agostino MOMENTUM M400 MONOBLOCK Owner's Manual - Page 2

Browse online or download pdf Owner's Manual for Amplifier Dan D'Agostino MOMENTUM M400 MONOBLOCK. Dan D'Agostino MOMENTUM M400 MONOBLOCK 9 pages.

Print Page

Thank you for purchasing the Momentum amplifier. I'm eager for you to hear it, because

the Momentum amps have been a special labor of love for me.

Everybody was thrilled with the original Momentum monoblock and stereo. And I was

really happy with them, too—I thought they were the best amp I've ever made. Still, even

though some thought the Momentum amplifiers might be as good as an amplifier could

get, I couldn't stop tinkering with it. As I developed more amps using the circuit concepts

I developed for the Momentum monoblock and stereo, I kept getting more ideas for how

I might make the Momentum amps just a little bit better. One by one, I tried them all out,

and kept notes how they affected the amp's sound and performance.

The result of all that testing is the M400 and S250. One change is obvious: The monoblock

is rated at 400 watts, up from the original 300 and the stereo is rated at 250 watts, up

from the original 200. This increase came not from any particular desire on my part for

more power, but more as a natural result of the improvements I made.

I started by replacing the original transformer with a new, ultra-quiet 1800VA unit. Right

off the bat, this gave me 20 percent more power to work with. I then upgraded the driver

stage—the transistors that interface the gain stage with the output stage. I switched to a

fully complementary design, with separate transistors for the positive and negative halves

of the audio signal. This nearly doubled the current capacity. I then expanded the output

stage to make the most of all this additional energy potential.

The result is an amp that accomplishes something I wasn't sure was possible: The

M400 and S250 sound even richer and more authoritative than the original Momentum

monoblock and stereo. I hope you agree.

As with every product that bears my name, the M400 and S250 are built by hand in our

Arizona factory, literally just steps away from my workbench. Because we keep such a

tight control on the manufacturing process, we can use techniques others can't—such

as through-hole construction, which sounds better and lasts longer than surface-mount

construction.

Thank you again for your support, and I hope you enjoy your new amplifier as much as I

enjoyed designing it!

" Musical, warm sounding and

authoritative. My best work."

Sincerely,

The Team from Dan D'Agostino Master Audio Systems

DAN D'AGOSTINO Founder, and Chief Designer of Dan D'Agostino Master Audio Systems