User's Manual
4
CHAPTER 1
Thank you for purchasing a
Sunfire Theater Grand Amplifier
. We hope you enjoy it and the music it
makes as much as we have enjoyed creating it for you.
The
TGA-7401
can produce
400 watts rms per channel into 8 ohms
and
800 watts rms into
4 ohms
.
The
TGA-7201
can produce
00 watts rms per channel into 8 ohms,
and
400 watts rms into
4 ohms
.
The big breakthrough is the uncanny tracking downconverter, which uses 18 Herculean Mosfets
in the TGA-7401 and the TGA-7201. This allows the amplifier to produce phenominal power output,
without the heat generated by conventional designs.
The circuit boards are heavy glass epoxy, double sided, with a Faraday shield on the back side. All
resistors in the signal path are 1% tolerance, metal-film. Critical capacitors are film devices with high
dielectric strength and ultra low absorption characteristics. An enormous power source built around a
massive power transformer provides the ultimate muscle for limitless dynamics.
We could go on and on, but here’s the best part: we’ve included two kinds of outputs on the
front
left
and
front right
channels:
(1) a standard
voltage-source
(i.e., near zero impedance) output for all typical applications and:
(2) a higher-impedance
current-source
output, which many prefer for electrostatic, planar mag-
netic, or ribbon speakers, such as our Cinema Ribbon line. Or you can biwire your system with
the voltage source driving the woofer(s) and the current source driving the upper part of the
system. In many cases this provides by far the best possible interface between the amplifier
and the speaker system.
Whichever way you decide to hook up the amplifier, it will create a multilayered soundstage that is
deep, wide, three-dimensional, and utterly believable. The optional current-source output can coax
forth a sensuous, delicately detailed musical voice long associated with low-powered classic tube
amplifiers. (The current-source characteristic of vacuum tubes is the dominant factor in the sound
-
stage delivery of classic tube amplifiers).
Introduction
