The power amplifier performs the simple but critical job of boosting the output signals from each channel of your stereo preamp or surround sound processor to the level necessary to drive your loudspeakers. While this may seem trivial, a really good power amp is essential to having a great audio system, because any flaws in the performance of your power amp are going to limit the performance of your entire system. Every amplifier in the new Third Generation XPA series was carefully designed to deliver superb technical performance, unsurpassed sound quality, and an exceptionally accurate and dynamic rendition of all types of music, thus ensuring that your entire system will sound its absolute best. Each individual XPA amplifier is modular, and can be customized to provide exactly the power and number of channels you need today, and expanded later if your needs change; and multiple matching chassis enables you to add even more channels, or more power, for a nearly endless variety of options.

Circuit Topology

• The XPA HC-1 is a monoblock audio power amplifier, with a fully discrete, dual differential, high current, short signal path Class A/B amplifier section, Optimized Class H™ power supply topology, and microprocessor-controlled fault protection.
• The XPA HC-1 is powered by a high efficiency, audiophile grade, Switch Mode Power Supply (SMPS).

Audio Specifications

• The XPA HC-1 features a single High-Powered Single Channel Amplifier Module.

Power Output: 300 watts RMS; 20 Hz – 20 kHz; THD <0.1%; 8 Ohms.  600 watts RMS; 20 Hz – 20 kHz; THD<0.2%; 4 Ohms.

• Power Bandwidth (at rated power; 4 Ohm - 8 Ohm load): 20 Hz to 20 kHz (+ / – 0.1 dB).
• Broad Band Frequency Response: 5 Hz to 80 kHz +0/-2 dB.
• THD + noise: < 0.015%; at 100 watts RMS; 1 kHz; 8 Ohms.
• Signal to Noise Ratio (8 Ohm load): > 120 dB; ref FTC rated power; unbalanced input (A-weighted). > 95 dB; ref 1 watt; unbalanced input (A-weighted).
• Minimum Recommended Load Impedance: 4 Ohms
• Damping Factor (8 Ohm load): > 500.
• Input Sensitivity (for rated power; 8 Ohm load): 1.7 V.
• Gain: 29 dB.
• Input Impedance: 33k Ohms (balanced). 23.5k Ohms (unbalanced).

Input And Output Connections

• Input Connections: Unbalanced (RCA); balanced (XLR); independently selectable.
• Speaker Output Connections: Audiophile grade, gold plated, 5-way binding posts.
• Trigger:

Power Requirements Between 100 VAC and 250 VAC @ 50 / 60 Hz (automatically detected).

Front Panel Controls and Indicators Standby: push button (halo ring changes color to indicate Standby or On).

Status LED: one; blue.

Rear Panel Controls  

• AC Power switch: rocker switch (switches AC main power).
• Status LED switch: disables front panel Status LED and dims Standby button halo.
• Input selector switch:
• Circuit Breaker: press button to reset circuit breaker.

Protection The XPA HC-1 is protected against excessive operating temperature, shorted speaker connections, ground faults, and other common fault conditions.

Mechanical Dimensions:  8-3/8” wide x 7-5/8” high x 19” deep (unboxed; including feet and connectors).  24-3/4” wide x 12” high x 14-1/2” deep (boxed).

• Weight:  Boxed: 28 lbs. Unboxed: 21.5 lbs.

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