Coda AMPLIFIER 15.0 Especificações descarregar pdf (Página 7)

DESCRIPTIONDESCRIPTION

DESCRIPTION

AMPLIFIER SECTIONAMPLIFIER SECTION

AMPLIFIER SECTION

Differential voltage gain throughout provides

exceptional rejection of external noise and

contributes to the inherent stability of the circuit.

The unit also uses output followers operating

without feedback.

The front end is designed to provide a slew rate

of 50 V/us without entering class B operation as

is common in many other designs. This com-

bined with excellent high frequency design

insures linear operation at high speed. The

supplies take a very direct approach to high

performance. A top quality toroidal transformer

capable of 2,000 VA is utilized, and 40,000 uF of

total capacitance assure an overbuilt power

supply.

The current stage is capable of producing peak

current outputs in excess of 50 peak Amperes

with a degree of linearity and speed which is not

matched by other designs when producing only

a fraction of this current. This is achieved by the

implementation of several distinct circuit fea-

tures.

Each channel uses 18 individual output transis-

tors with a combined power rating of 3,600 Watts

and 75 Amperes and a bandwidth of 10 MHz.

The Unison 3.3 operates in Class A up to approx-

imately 7 Watts. At higher output levels, the

amplifier slides into Class AB operation. The bias

section is designed to produce a precision trans-

ition with no abrupt changes in distortion or output

impedance. This "Precision Bias" technique yields

seamless performance regardless of the complexity

of the load impedance. With such linearity and

bandwidth no overall feedback correction is used.

One advantage of this is a high degree of immunity

from interactions with complex speaker loads or

cables.

The AC power entry module has a line fuse, a

spare fuse and a power switch. Since the power

draw is low, the preamp may be left on, except

when installing, changing cables, or changing

system components.

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