**We should make this the thread for XPA1 amplifier owners **
XPA-1 Differential Reference Mono-block Power Amplifier

500 watts RMS x 1 into 8 ohms, 1,000 watts RMS x 1 into 4 ohms.

Effortless power. Performance. Sound. A true reference level amplifier.

You know that sweet spot all amplifiers have? That magical level where things are rich, full, but still a bit relaxed? The amp is in its comfort zone, open, but not overworked. What if you could find that sweet spot at practically any volume level?

It's all about control, and the XPA-1 is a control freak. 500 watts RMS into 8 ohms, 1,000 watts RMS into 4 ohms. All the performance you'd expect to see for an audiophile reference level amplifier. But what about the sound? Big...expansive...powerful...and yet very refined...and defined. This is what you get when you have control.

Mono-block amplifiers have typically been a company's flagships. They define the ultimate expression of a company's approach to design and construction. The XPA-1 amplifier puts our ultimate expression within your reach at market-shattering prices.

Our commitment to build quality, superior design and ultimate performance is reelected in every facet of the XPA-1. Effortless. Period.

Power output:

8 ohms = 500 WRMS

4 ohms = 1000 WRMS

Stable below 4 ohms

Gain structure - 32db.

Frequency response is 20 to 20Khz with less than 0.2db deviation.

Broadband frequency response: 10 to 100Khz at +0db-3db.

Signal to noise ratio at 1 watt: <89db and <117db referenced to full power output.

THD at rated power for all impedance is 0.001% (referenced from 20 to 20Khz)

True Differential Reference design

Discrete front end

Fully balanced quad differential input stage

Darlington VAS stage with optimized C dominant pole

Ultra high current ON Semiconductor output stage with low output impedance

24) output devices

1200VA transformer with 130,000uF of secondary capacitance

Laser etched serial number on faceplate

High resolution LED metering (defeatable)

Effortless. The XPA-1. $999

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