M600 ($53,000)

Technical Audio Devices’ new M600 monaural amp is a beast by any definition—it delivers a whopping 600 watts of power at 4 ohms. It utilizes single-stage voltage amplification in a 77-pound graphite cast-iron monocoque chassis, which provides a sturdy, vibration-resistant base. Pair this amp with TAD’s Reference One or Compact Reference speakers for a mind-blowing two-channel home-audio setup. (213.268.2748, tad-labs.com)

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