BasX A3+ Three-Channel Power Amplifier

The BasX A3+ is a three channel power amplifier. The BasX A3+ combines classical audiophile amplifier architecture, based on a heavy-duty linear power supply, and a carefully designed high current short signal path Class A/B output stage, with advanced microprocessor-controlled monitoring and protection circuitry, to deliver superb sound quality at a truly reasonable price.

Power Output (ALL channels driven)

140 watts RMS per channel; 20 Hz – 20 kHz; THD < 0.1%; into 8 Ohms
200 watts RMS per channel; 1 kHz; THD < 1%; into 4 Ohms

Power Output (two channels driven)

150 watts RMS per channel; into 8 Ohms250 watts RMS per channel; into 4 Ohms

• Power Bandwidth (at rated power; 4 Ohm - 8 Ohm load): 20 Hz to 20 kHz (+ / – 0.02 dB)

• Broad Band Frequency Response: 10 Hz to 80 kHz +0/-1.8 dB

• THD + noise: < 0.02% (A-weighted); ref rated power

• Signal to Noise Ratio (8 Ohm load): > 112 dB; ref rated power; (A-weighted)

• Minimum Recommended Load Impedance (per channel): 4 Ohms (equals one 4 Ohm load or two paralleled 8 Ohm loads)

• Damping Factor (8 Ohm load): > 500

• Input Sensitivity (for rated power; 8 Ohm load): 1.25

• Gain: 29 dB• Input Impedance: 27 kOhms

Input Connections

Unbalanced (RCA); one each per channel
Balanced (XLR); one each per channel

Speaker Output Connections

Audiophile grade 5-way binding posts

Trigger

• Trigger Input: 5 – 12 V (AC or DC); <10 mA input current required

• Trigger Output: 12 VDC; can drive any load up to 120 mA

Power Requirements

• 115 VAC or 230 VAC @ 50 / 60 Hz (automatically detected)

Protection

• The BasX A3+ is protected against excessive operating temperature, shorted speaker connections, ground faults, and other common fault conditions.

Front Panel Controls and Indicators

• Standby: push button
• Status LEDs: one per channel; blue
• Standby LED: amber

Rear Panel Controls

• AC Power switch: rocker switch (switches AC main power)
• Status LEDs switch: disables front panel Status LEDs

Dimensions

• 17” wide x 4” high x 15-1/2” deep (not including connectors)
• 21-1/2” wide x 8” high x 21” deep (boxed)

Weight

25 lbs (unboxed)31 lbs (boxed)