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XPA Gen 3 Amplifiers

Circuit Topology

The BasX A-300 is a two channel power amplifier. The BasX A-300 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 (both channels driven):
150 watts RMS per channel; 20 Hz – 20 kHz; THD < 0.1%; into 8 Ohms. 300 watts RMS per channel; 1 kHz; THD < 1%; into 4 Ohms. Power Bandwidth (at rated power; 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): > 120 dB; ref rated power; (A-weighted).
> 100 dB; ref 1 watt; (A-weighted).
Minimum Recommended Load Impedance (per channel): 4 Ohms
(which 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 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 (halo ring changes color to indicate Standby or On). Status LEDs: one per channel; blue. Status LEDs change to red to indicate a fault condition. Rear Panel Controls AC Power switch: rocker switch (switches AC main power). Status LEDs switch: disables front panel Status LEDs. Protection The BasX A-300 is protected against excessive operating temperature, shorted speaker connections, ground faults, and other common fault conditions. Mechanical Dimensions: 17” wide x 4” high x 15.5” deep (not including connectors). 21-1/2” wide x 8” high x 21” deep (boxed). Weight: 25.2 lbs (unboxed) 33 lbs (boxed) $399

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