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User's Manual
Introduction
Dear Friend:
Thank you for purchasing my
Sunfire Cinema Grand
five channel power amplifier. I hope
you enjoy it and the music it makes as much as I have enjoyed creating it for you.
This magnificent amplifier represents my very latest thinking and I’ve spent over twenty years
developing it. The
Cinema Grand
can produce 225 watts rms per channel into 8 ohms, and 450
watts rms per channel into 4 ohms.
The big breakthrough feature of the
Cinema Grand
is its uncanny tracking downconverter,
which uses 12 Herculean Mosfets.
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
Cinema
Grand
power source built around a massive power transformer provides the ultimate muscle for
limitless dynamics.
I could go on and on, but here’s the best part: I’ve included two kinds of outputs on the front
left and front right:
(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. 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
Sunfire Cinema Grand
, 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 soundstage delivery of classic tube amplifiers).
Bob Carver, Amplifier Designer, Physicist
Introduction