The BasX A11 is an eleven-channel power amplifier that delivers 105 watts / channel into 8 Ohms and 140 watts / channel into 4 Ohms, all channels driven, with a rated THD+N of < 0.1%, and an A-weighted S/N ratio of <115 dB. The BasX A11 features a heavy-duty linear power supply, high-quality Class A/B amplification, transparent fault protection, and a trigger input and output. High quality industry standard unbalanced RCA inputs enable the BasX A11 to be used with almost any preamp or processor. Audiophile grade five-way speaker terminals accept banana plugs, spade lugs, or bare wires. These features combined allow the BasX A11 to deliver true audiophile performance and sound-quality at an amazingly affordable price.

The BasX A11 is a great choice if you're looking for a high-quality power amp to pair with a pre/pro, like our MC1 to power all the speakers in a 7.1.4 channel system. Because the A11 provides so many channels of amplification in a single chassis, it also allows some other interesting connectivity options, such as powering the channels in a formidable 7.1 system with bi-amped main LCR speakers!

Circuit Topology

The BasX A11 is an eleven-channel power amplifier. It combines classical audiophile amplifier architecture, based on a heavy-duty Class H 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 and high efficiency at a truly reasonable price.

Audio Specifications

Power Output (ALL channels driven):
• 105 watts RMS per channel; 20 Hz – 20 kHz; THD < 0.1%; into 8 Ohms
• 140 watts RMS per channel; 1 kHz; THD < 1%; into 4 Ohms

Power Output (two channels driven)
• 160 watts RMS per channel; into 8 Ohms
• 260 watts RMS per channel; into 4 Ohms

Power Output (5 channels driven)
• 145 watts RMS per channel; into 8 Ohms
• 200 watts RMS per channel; into 4 Ohms

Power Output (7 channels driven)
• 125 watts RMS per channel; into 8 Ohms
• 180 watts RMS per channel; into 4 Ohms

• Power Bandwidth (at rated power; 4 Ohm - 8 Ohm load): 20 Hz to 20 kHz (+ / – 0.07 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):
> 115 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): 1.2 V

• Gain: 29 dB

• Input Impedance: 27 kOhms

Input And Output Connections

• Input Connections: Unbalanced (RCA); 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)

Front Panel Controls and Indicators

• Standby: push button
• Status LEDs: one per channel; blue
• Status LEDs change to red to indicate a fault condition
• Standby LED: amber

Rear Panel Controls

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

Protection

• The BasX A11 is protected against excessive operating temperature, shorted speaker connections, ground faults, and other common fault conditions.

Mechanical

Dimensions:
• 17” wide x 7 3/4” high x 15-1/2” deep (not including connectors)
• 23” wide x 13” high x 21 1/2” deep (boxed)

Weight:
• 51 lbs (unboxed)
• 57 lbs (boxed)

Downloads

Download Product Manual