The BasX A2+ is a two-channel power amplifier that delivers 160 watts per channel into 8 ohms and 250 watts per channel into 4 ohms, all channels driven, with a rated THD+N of less than 0.02% and an A-weighted signal-to-noise ratio of 112 dB. The A2+ features a robust linear power supply built around an oversized toroidal transformer, a refined Class A/B output stage, transparent fault protection, and both trigger input and output for flexible system integration. 

New to the A2+ are balanced XLR inputs in addition to the unbalanced RCA inputs for each channel, giving it even broader compatibility with a wide range of stereo preamps, processors, and receivers with preamp outputs. The heavy-duty five-way binding posts accept banana plugs, spade lugs, or bare wire for solid speaker connections. Together, these features allow the BasX A2+ to deliver clean, dynamic audiophile soundat a price that puts high-end performance within reach.

The BasX A2+ is the perfect solution anywhere two channels of reliable, great-sounding power are needed. It’s ideal for building a dedicated two-channel system with a stereo preamp or DAC, and a smart way to upgrade the front channels of a surround sound receiver or a stereo receiver with preamp outputs. It’s also well-suited for powering a second zone with true hi-fi clarity. 

Whether you're a newcomer stepping into high-performance audio or a seasoned listener building out your system, the A2+ brings serious value, versatility, and sound quality to any setup.

Circuit Topology

The BasX A2+ is a two-channel
power amplifier that 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 affordable price.

Audio Specifications

• Power Output (BOTH channels driven):

160 watts RMS per channel; 20 Hz – 20 kHz; THD < 0.1%; into 8 Ohms.

250 watts RMS per channel; 1 kHz; THD < 1%; into 4 Ohms.

• Gain: 29 dB.

• Power Bandwidth (at rated power; 4 Ohm - 8 Ohm
load): 

20 Hz to 20 kHz (+ / – 0.07 dB).

• Broad Band Frequency Response:

5 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).

> 95 dB; ref 1 watt; (A-weighted.

• Minimum Recommended Load Impedance (per
channel): 

4 Ohms (equals one 4 Ohm speaker or two paralleled 8 Ohm speakers).

• Damping Factor: 

(8 Ohm load): > 500.

• Input Impedance: 

27 kOhms.

Input And Output Connections

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

Environmental

Dimensions: 

17” wide x 4-1/4” high x 15-1/2” deep (unboxed; including feet).

17” wide x 3-1/2” high x 15-1/2” deep (unboxed; without feet).

Weight: 

25.2 pounds (unboxed).

User Manual

User Manual