Circuit Topology
The XPA-11 Gen3 is a fully modular audio power amplifier with a 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, and microprocessor-controlled fault protection.
The XPA-11 is powered by a high efficiency, audiophile grade, Switch Mode Power Supply (SMPS).
 
Audio Specifications
The XPA-11 Gen3 features three of our High-Powered Single Channel Modules and four of our Stereo Modules.  
 
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Audio Specifications (Stereo Modules):
Power Output:
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• 80 watts RMS/channel; THD<0.1%; 8 Ohms; two channels driven
• 100 watts RMS/channel; THD<0.1%; 4 Ohms; two channels driven
• 80 watts RMS/channel; THD<0.1%; 8 Ohms; eleven channels driven
• 100 watts RMS/channel; THD<0.1%; 4 Ohms; eleven channels driven
Power Bandwidth (at rated power; 4 Ohm - 8 Ohm load): 20 Hz to 20 kHz (+ / – 0.1 dB)
Broad Band Frequency Response: 50 Hz to 80 kHz +0/-1.5 dB
THD + noise: < 0.1%; at 80 watts RMS; 1 kHz; 8 Ohms
Signal to Noise Ratio (8 Ohm load):
• > 105 dB; ref FTC rated power; unbalanced input (A-weighted)
• > 85 dB; ref 1 watt; unbalanced input (A-weighted)
Minimum Recommended Load Impedance (per channel): 4 Ohms (one 4 Ohm load or two paralleled 8 Ohm loads)
Damping Factor (8 Ohm load): > 500
Input Sensitivity (for rated power; 8 Ohm load): 0.8 V (800 mV)
Gain: 29 dB
Input Impedance:
• 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.
 
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:
• 53 lbs (unboxed)
• 58 lbs (boxed)