Wadia 321 DAC Preamplifier and 315 Stereo Amplifier - DEMO

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Beautiful Wadia Sound - this makes a great two channel system...

Wadia 321 DAC Preamplifier and 315 Stereo Amplifier - DEMO

Warranty Included

The Wadia 321 DAC/Pre has two optical, two coaxial and one high speed USB digital input, allowing music from all sources to be reproduced with the extreme precision and elegance audiophiles expect from Wadia Digital. The truly exceptional sound quality is facilitated by the variable balanced and unbalanced audio outputs, offering premium noise rejection for optimal performance. The clean glass top panel, aluminum construction and fiber optic light diffuser panel illumination of the chassis add aesthetic beauty and an extremely comprehensive user interface to the superior sound quality of the Wadia 321, resulting in a complete solution component for the most discerning customer. Pair this with the Wadia a315 Stereo Amplifier for stunning music reproduction.


• 192 kHz/24 bit sampling rate
• Five digital inputs, including USB
• Variable analog output
• Beautiful industrial design of glass and aluminum

Frequency Response
+/-0.5dB from 4Hz to 20,000Hz
+0.5/-3dB from 4Hz to 68,000Hz (Source dependent) 

Total Harmonic Distortion 

Variable Output level
0-4.0Vrms Unbalanced/0-8.0Vrms Balanced 

Signal-to-Noise Ratio (A-Weighted) 

Dynamic Range 

Output Impedance
600 ohms Unbalanced and Balanced

Digital Input Format 

Digital Input Sample Rate 
Coaxial and Optical: Up to 192KHz, 24-Bit
USB: Up to 192KHz, 32-Bit 

Digital Inputs 
Coaxial 1 and 2: 0.5V p-p/75 ohms
Optical 1 and 2: - 15dbm to -21dbm (TOS Link) 
USB: USB Type B Connector

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

25 pounds (11.4 kg)

The Wadia a315 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.

Along with all of our new generation amplifiers, the a315 is able to deliver massive amounts of power directly to your speakers with very little energy wasted in heat dissipation thanks to its electronic switching design. Large cooling fins or noisy fans often found in other high power amplifiers are no longer needed. The result is a greener, compact and energy efficient amplifier.

The a315 features some of the latest technology from Wadia. Frequency Switching Transmission™ (FST), an adaptive modulation design, reduces distortion at any power level over the entire audio spectrum. Using a feedback technique, it makes real time micro-adjustments to the switching carrier frequency to improve linearity, thereby significantly reducing audio distortion. The higher the amplifier’s power output, the greater observed reduction in distortion. 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.


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

OUTPUT LOAD IMPEDANCE - 8 ohms or 4 ohms

20Hz to 20kHz

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

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

INPUT SENSITIVITY - 2.4V Balanced / 1.2V Unbalanced

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

10K ohms Balanced and Unbalanced



12VDC, 50mA maximum, delayed 0.2 seconds

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 - 27 pounds (12.2 kg)

Note: All Specifications are with AC Line voltage of 120V.


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