The Viola Legacy mono power amplier is capable of
delivering 100 watts of Class A power into 16, 8, 4 and 2
ohms. The Legacy is fully balanced design with very low
distortion, wide dynamics and reproduction of low level
detail. Class A operation eliminates crossover distortion
inherent in Class B and Class AB designs.
Legacy Audio Design
The Legacy is a Class A biased push-pull amplier that utilizes
low global feedback. Two matched power amplier modules
that are driven into a center-tapped output transformer. This
allows fully balanced operation from input to output. Soft
clipping circuitry limits sonic degradation should the amplier
be overdriven. The Legacy is capable of switching to Class AB
to deliver more power into demanding loads while still pre-
serving subtle aspects of the music signal. The Legacy is
protected against overvoltage, over temperature, excessive
current and DC offset.
Legacy Power Supply
As with all Viola ampliers designs, the Legacy features a
choke input power supply. The Legacy power supply reduces
high charging currents that are prevalent in capacitor input
supplies. This minimizes intermodulation distortion on the
power supply rails and ground returns. This also has the
benet of reducing stress on the power supply components.
Onboard decoupling capacitors eliminate wire inductance
along with lm capacitors provide a uniformly low power
supply impedance.
Viola Legacy Specications
Class of Output Operation A
Power Rating 100W continuous average power into 16, 8, 4,
and 2 ohms 20 Hz to 20 kHz at less than
0.25% THD
IM Distortion (SMPTE) 1W to 100W <0.01%
THD <0.08% @ 20 kHz/100 watts
Frequency Response 1W into 8 ohms (10Hz – 20kHz) +/-0.25 db;
100k <-3db
Power Bandwidth 5 Hz to 100 kHz (-3dB points)
SN Ratio <-110 db at 1 kHz / 100W; C weighted
Gain 26 dB
Input Impedance 1M Ohm / 1M Ohm balanced
Inputs 2 x Balanced – XLR
Output Connections 1 pair of binding posts for spade terminals for
each impedance tap
Power Consumption Approximately 450W at idle
Weight Amplier 168 lbs. (76.2kg)
Dimensions Height w/feet 12 3⁄16’’ (31.0 cm)
Width 17 9⁄16’’ (44.6 cm)
Depth w/binding posts 26 1⁄2’’ (67.3cm)
© Viola Audio Labs 2010
4
CLASS A MONO POWER AMPLIFIER
LEGACY
(14 paginas)
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