DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
DESCRIPTION
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The remote controlled Continuum Electronics
Unison Integrated Amplifier is designed with a
level of thoroughness reserved only for the finest
preamplifier and amplifier gain stages. Analyti
cal, design techniques both objective and
subjective, are applied in an open-minded
fashion with musical perfection as the goal.
PREAMPLIFIER SECTION
PREAMPLIFIER SECTION
PREAMPLIFIER SECTION
PREAMPLIFIER SECTION
PREAMPLIFIER SECTION
On the faceplate, the straightforward controls
and display provide comprehensive functionality
to the user. All input selections have LEDs to
show when they are in use. Buttons control both
volume and balance, with an LED display to
show which channels are being adjusted.
Settings for the volume and balance are pre
cisely indicated in dB of attenuation by the LED
display.
Gain is provided by the high performance
Burr-Brown PGA2310, successor to the highly
acclaimed Crystal Semiconductor CS3310.
This new digitally controlled analogue device
features an improved output buffer and increased
voltage swing for high level input signals.
Digitally controlled level tracking allows 1 dB per
step attenuation without error. The digitally
controlled stepped resistors and a zero crossing
detection circuit allow for "zipperfree" operation.
Total harmonic distortion is less than 0.005%
with a signal to noise ratio approaching 130 dB.
Unlike other integrated amplifiers, Unison offers
true “separates” performance. The preamplifier
power supply even has its own independent
transformer taps.
A reference voltage is developed by delivering
constant current to zener diodes. The resulting
voltage is heavily filtered and delivered through
class-A followers. The non-reactive, low-imped-
ance and extremely wide bandwidth voltage rails
yield a perfectly stable power source for the gain
stages.
