Introduction:
Congratulations! You have just purchased a
new, state of the art, 70.7V Digital Power
Amplifier which will provide you with many
years of reliable service. Stewart Audio’s
commitment to innovation in design and
quality workmanship has provided its
customers with a unique combination of
performance and reliability. This commitment
to excellence has gained the respect of
industry professionals around the world.
The DA-770-2 Series Professional Power
Amplifier utilizes a new high speed switching
power supply and Class “T” output topology.
The amplifier will deliver over 80 Watts @
70.7V of power per channel and is offered in a
2 channel configuration. This remarkable
performance comes in a very compact package
weighing a mere 3.4 pounds and occupying
just one-half standard rack space. The DA-
770-2 Series Amplifiers are convection cooled
and require no noisy fans for cooling.
We at Stewart Audio strive to bring you the
finest in professional electronics, and we thank
you for your choice, which we see as an
appreciation for our efforts.
The Stewart Audio Design Team
4
Specifications
17
8 Ohm Stereo Power 35 Watts/Ch
4 Ohm Stereo Power 70 Watts/Ch
Frequency Response
(+0, –0.5 dB, 1W)
20 Hz—20 kHz
Full Power Bandwidth
(20-Hz-20 kHz)
±
.7 dB
Signal to Noise >93 dB
THD+N < .25%
Input Sensitivity 1V (0 dBV)
Standard Voltage Gain 17X (25 dB)
Input impedance
(Balanced / Unbalanced)
20k Ohms / 5k Ohms
Class Damped Ternary Modulation
Input Connectors Phoenix Type
Output Connectors Phoenix Type
Power Supply High Speed Switching
Cooling Convection (No Fans)
Controls Power on/off, Channel Gain
LED Indicators Power & Clip
Construction Steel & Aluminum Chassis
Dimensions (height, width, depth) 1.75”H x 8.26”W x 10.6”D
Max Weight 3.4 lbs (1.54 kg)
Warranty 3 years Parts & Labor
