Emotiva BasX A4 / 4-Channel Power Amplifier

Circuit Topology
The BasX A4 is a four channel power amplifier. The BasX A4 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):
100 watts RMS per channel; 20 Hz 20 kHz; THD < 0.1%; into 8 Ohms
130 watts RMS per channel; 1 kHz; THD < 1%; into 4 Ohms

Power Output (two channels driven):
100 watts RMS per channel; into 8 Ohms
175 watts RMS per channel; into 4 Ohms

Power Bandwidth (at rated power; 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