Emotiva XPA-2 Gen3 2 Channel Power Amplifier

Circuit Topology and Specifications of XPA-2 Gen3

1. Circuit Topology:
   • Fully modular audio power amplifier.
   • High-efficiency switch mode power supply (SMPS).
   • Independent, fully discrete, dual differential, high current, short signal path Class A/B amplifier modules.
   • Optimized Class H™ power supply topology.
   • Microprocessor-controlled fault protection.
2. Audio Specifications:
   • Features two High-Powered Single Channel Modules.
   • Power Output (Single Channel Modules):
     • 300 watts RMS/channel; 20 Hz – 20 kHz; THD<0.1%; 8 Ohms; one channel driven.
     • 550 watts RMS/channel; 20 Hz – 20 kHz; THD<0.2%; 4 Ohms; one channel driven.
     • 300 watts RMS/channel; THD<0.1%; 8 Ohms; two channels driven.
     • 490 watts RMS/channel; THD<0.1%; 4 Ohms; two channels driven.
   • Power Bandwidth: 20 Hz to 20 kHz (+/- 0.1 dB).
   • Broad Band Frequency Response: 5 Hz to 80 kHz +0/-2 dB.
   • THD + noise: < 0.005% at 100 watts RMS; 1 kHz; 8 Ohms.
   • Signal to Noise Ratio (8 Ohm load): > 117 dB (A-weighted, FTC rated power); > 91 dB (ref 1 watt).
   • Minimum Recommended Load Impedance: 4 Ohms per channel.
   • Damping Factor (8 Ohm load): > 500.
   • Input Sensitivity: 1.5 V for rated power; 8 Ohm load.
   • Gain: 29 dB.
   • Maximum Power Consumption: 1,000 watts.
   • Input Impedance: 33 kOhms (balanced); 23.5 kOhms (unbalanced).
3. Input and Output Connections:
   • Input Connections (Single Channel Modules): Unbalanced (RCA); balanced (XLR); one each per channel.
   • Speaker Output Connections: Audiophile grade, gold plated, 5-way binding posts.
   • Trigger: Input: 5 – 12 V (AC or DC); Output: 12 VDC; up to 120 mA load.
4. Power Requirements:
   • Between 100 VAC and 250 VAC @ 50 / 60 Hz (auto-detected).
5. Front Panel Controls and Indicators:
   • Standby: push button with color-indicating halo ring.
   • Status LEDs: one per channel (blue; turns red to indicate faults).
6. Rear Panel Controls:
   • AC Power switch: rocker switch.
   • Status LEDs switch: disables front panel LEDs, dims Standby button halo.
   • Input selector switches: metal toggle switches for each channel.
   • Circuit Breaker: press button to reset.
7. Protection Mechanisms:
   • Protection against excessive operating temperature, shorted speaker connections, ground faults, and other common faults.
8. Mechanical Specifications:
   • Dimensions:
     • 17” wide x 8” high x 19” deep (unboxed; including feet).
     • 17” wide x 7” high x 19” deep (unboxed; without feet).
     • 24-1/2” wide x 12” high x 24-3/4” deep (boxed).
   • Weight:
     • 35.5 lbs (unboxed).
     • 40.5 lbs (boxed).