The Wadia a315 digital stereo amplifier provides 150 watts per channel at 8 ohms or 250 watts per channel at 4 ohms. It shares the same sleek, modern industrial design as the 321 decoding computer, making it a perfect amp to use with the 321. Both will blend nicely with virtually any room styling.
The a315 features some of the latest technology from Wadia. Frequency Switching Transmission™ (FST) is an adaptive modulation design in the amplifier circuitry that assures full output power is delivered over the entire audio spectrum. Signal Surveyor™ monitors the output signal and stops amplification if unsafe levels of DC voltage are detected, thus protecting your speakers.
Both balanced and unbalanced inputs are available for connecting your other system components. Specially designed 5-way binding posts will securely hold your speaker wire; they are designed for easy finger tightening and come with a special tool if even more snug connections are desired. A trigger input and output makes it simple to control the power state of your entire system when the a315 is turned on/off.

Technical specifications

POWER OUTPUT
150 watts into 8 ohm loads
250 watts into 4 ohm loads

OUTPUT LOAD IMPEDANCE
8 ohms or 4 ohms

RATED POWER BAND
20Hz to 20kHz

TOTAL HARMONIC DISTORTION
0.1% maximum harmonic distortion at any level from 250 milliwatts to one-half of rated power output, 20Hz to 20kHz;
0.5% maximum harmonic distortion at any level from one-half to full rated power output, 20Hz to 20kHz

DYNAMIC HEADROOM
1dB 8 ohm load
1.6dB 4 ohm load

FREQUENCY RESPONSE
+0, -0.5dB from 20Hz to 20kHz
+0, -3.0dB from 10Hz to 70kHz

INPUT SENSITIVITY
2.4V Balanced
1.2V Unbalanced

A-WEIGHTED SIGNAL TO NOISE RATIO
90dB (112dB below rated output) Balanced
88dB (110dB below rated output) Unbalanced

INTERMODULATION DISTORTION
0.1% maximum if instantaneous peak power output does not exceed the rated output for any combination of frequencies from 20Hz to 20kHz

WIDE BAND DAMPING FACTOR
Greater than 320, 8 ohm load
Greater than 160, 4 ohm load

INPUT IMPEDANCE
10K ohms Balanced and Unbalanced

VOLTAGE GAIN
29dB

TRIGGER INPUT
5-15VDC, <1mA

TRIGGER OUTPUT
12VDC, 50mA maximum, delayed 0.2 seconds

OVERALL DIMENSIONS
Width 17-7/8 inches (45.4 cm)
Height 3-3/8 inches (8.6 cm) including feet
Depth 20 inches (50.8 cm) including cables

WEIGHT: 12.2 kg