The BasX A7 is a seven channel power amplifier that delivers 90 watts / channel into 8 Ohms and 125 watts / channel into 4 Ohms, all channels driven, with a rated THD+N of < 0.02%, and an A-weighted S/N ratio of 115 dB. The BasX A7 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 A7 to be used with almost any preamp or processor and audiophile grade five way speaker terminals accept banana plugs, spade lugs, or bare wire. These features combine to enable the BasX A7 to deliver true audiophile performance and sound quality at an amazingly affordable price.

The BasX A7 is a great choice if you're looking for a high quality seven channel amplifier to go with a processor in a new 7.1 channel surround sound system, or if you're looking for an easy way to upgrade the amps in your existing surround sound receiver.

Circuit Topology

The BasX A7 is a seven channel power amplifier. The BasX A7 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.

Audio Specifications

Power Output (ALL channels driven):

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

• 125 watts RMS per channel; 1 kHz; THD < 1%; into 4 Ohms

Power Output (two channels driven):

• 120 watts RMS per channel; into 8 Ohms

• 175 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):
> 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 A7 is protected against excessive operating temperature, shorted speaker connections, ground faults, and other common fault conditions.

Mechanical

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:

• 30 lbs (unboxed)

• 36 lbs (boxed)

Downloads

Download Product Manual