Due to their electronic switching design, our new generation of amplifiers - including the a340 - are able to deliver massive amounts of power directly to your speakers with very little energy wasted in heat generation and dissipation. The large cooling fins or noisy fans often found in other high power amplifiers are no longer necessary. The result is a greener, compact and energy efficient amplifier.

The a340 includes the latest technology from Wadia. It features a comprehensive balanced signal design from input through output stage known as IO Symmetry™ that provides total system differential pairing - resulting in increased audio quality and noise reduction. 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. To protect your speakers, Signal Surveyor™ monitors the output signal and stops amplification if unsafe levels of DC voltage are detected.

Both balanced and unbalanced inputs are available for connecting your other system components; balanced and unbalanced outputs are also included for ease of connecting bi-amp configurations. 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 a340 is turned on/off. 

Technical specifications

POWER OUTPUT
400 watts into 8 ohm loads
500 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
1.7dB 8 ohm load
2.7dB 4 ohm load

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

INPUT SENSITIVITY
4V Balanced
2V Unbalanced

A-WEIGHTED SIGNAL TO NOISE RATIO
90dB (116dB below rated output) Balanced
87dB (113dB 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 kg

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