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 enable you to add even more channels, or more power, for a near endless variety of options.
XPA-4
The new XPA-4 is a four-channel audiophile quality power amplifier, and is perfect for powering:
Any surround, height, or ceiling speakers.
Connecting an XPA-4 to the preamp outputs of your current high-quality AVR is a great way to upgrade the performance and sound quality of the Atmos/DTSX effects channels like surrounds, ceiling, and height speakers.
Configuration:
4 x High-Powered Single-Channel Modules
(four module slots remain available for future expansion)
Power output:
260 watts/channel RMS into 8 Ohms; all channels driven
300 watts/channel RMS into 8 Ohms; two channels driven
490 watts/channel RMS into 4 Ohms; two channels driven
Learn About Gen 3
Circuit Topology
The XPA-4 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-4 is powered by a high efficiency, audiophile grade, Switch Mode Power Supply (SMPS).
Audio Specifications
The XPA-4 Gen3 features three of our High-Powered Single Channel Modules.
Audio Specifications (Four High-Powered Single Channel Modules):
Power Output:
• 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
• 260 watts RMS/channel; THD<0.1%; 8 Ohms; ALL FOUR channels driven
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: < 0.005%; at 100 watts RMS; 1 kHz; 8 Ohms
Signal to Noise Ratio (8 Ohm load):
• > 117 dB; ref FTC rated power; unbalanced input (A-weighted)
• > 91 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): 1.5 V
Gain: 29 dB
Maximum Power Consumption: 1,700 watts.
Note: The values shown refer to the amount of power the amplifier wouldconsume while playing test tones continuously, on all channels, at full power, into a load bank. Therefore, they are not at all characteristic of what you would expect when playing music or the soundtrack from a movie.
Normal audio signals are dynamic, so the amount of power they require from second to second varies widely, and the average is far lower than this. With normal content, even playing very loudly, one of our amplifiers will consumefarless power than indicated in the chart, so these values should not be considered to be a circuit requirement for normal operation.
Input Impedance:
• 33 kOhms (balanced)
• 23.5 kOhms (unbalanced)
Input And Output Connections
Input Connections (High-Powered Single Channel Modules): Unbalanced (RCA); balanced (XLR); one each per channel, independently selectable.
Input Connections (Stereo Modules):
2 Unbalanced (RCA); 2 balanced (XLR); two per channel, independently selectable.
Speaker Output Connections: Audiophile grade, gold plated, 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
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 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 and dims Standby button halo.
• Input selector switches (one per channel):
metal toggle switches; select between balanced and unbalanced inputs.
• Circuit Breaker: press button to reset circuit breaker.
Protection
The XPA Gen3 is protected against excessive operating temperature, shorted speaker connections, ground faults, and other common fault conditions.
Mechanical
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:
• 42 lbs (unboxed)
• 48 lbs (boxed)
