Linear Tube Audio microZOTL 2S

For Sale, Original Owner, MICROZOTL MZ2S HEADPHONE AMP / PREAMP / 1-WATT SPEAKER AMP with STOCK SWITCHING PSU
The second generation of the product that started LTA, the microZOTL MZ2 contains years of product development in one compact chassis. Built on the 6SN7 tube, the MZ2 remains the reference introduction to the unique ZOTL circuit.
“my experience with the Linear Tube Audio MicroZOTL2.0 headphone amp/preamplifier has been one of the most remarkable and surprising experiences I have ever had as a listener and reviewer. The MicroZOTL2.0 may be a very inexpensive, ordinary-looking, unpretentious headphone amplifier/preamplifier, but it's one of the best-sounding preamplifiers on the market. This was an amazing discovery, particularly when you consider the product's price. Because of its spatiality, three-dimensional imaging, lack of a noise floor, beautiful timbres and instrument colors, tremendously powerful taut bottom end, and overall dynamics, the MicroZOTL2.0 does not take a back seat to any preamplifier.” - Home Theater Review
FEATURES • Designed by David Berning - one of the world’s premier amplifier designers • Hand-made just outside Washington, DC • External power supply - extremely low noise floor • Drive high efficiency speakers (95db efficiency or higher) to adequate volume. • Transparent cover • Universal voltage power supply or high quality linear power supply • 2 selectable inputs • Class A preamplifier output • Transformer-less design eliminates intermodulation distortion inherent in all transformer designs • Simulates the correct transformer turns ratio using impedance converter • Low impedance output easily matches wide range of headphones and speakers • No heavy power or audio transformers • Optimized tube life expectancy of 10 - 20 years based on use • One year warranty including tubes (international pays shipping)
SPECIFICATIONS • Amplifier class: Push-pull Class A, no feedback • Sensitivity: 0.6V RMS [full output] • Output impedance: (measured @ 0.5A, 60 Hz) 2 ohms • Input impedance: 50k • Power Supply Input: Auto-switching 100V / 120V / 220 / 240V operation or linear supply user-switchable between 110/120 and 220/240 (contact us if in need of a 100V linear supply) • Power Supply Output: 12VDC 2.5 amps • Hum and noise: minimum 60mV RMS or 90dB below full output (20Hz-20kHz) • Power consumption from ac power source: 33W • Power output: with 4-ohm load: 1W, 1% THD, with 14-ohm load: 0.5W, 1% THD • Channel separation: (4-ohm loads) 46dB, 100Hz-10kHz, (14-ohm loads): 54 dB, 100Hz-10kHz • Frequency response full power: (4-ohm load) +0, -1dB 10Hz-20kHz, (14-ohm load): +0, -1dB 5Hz-50kHz, • Voltage gain: (4-ohm load): 10.3dB, (14-ohm load): 12.4dB • Size: • Amplifier: 9 1/2 inches (24.1 cm) wide, 4 3/4 inches (12.0 cm) tall, 7 7/8 inches (19.7 cm) deep (including connectors) Linear power supply: 12" (30.48 cm) x 3.25" (8.26 cm) x 4.25" (10.8 cm) • Net weight: • With switching supply: 5.35 lbs (2.5 kg) - amplifier and external power supply) With linear supply: 8.94 lbs (4.1 kg) - amplifier and external power supply) • Finish: Aluminum case w/ lexan top • Tube complement per channel: 12AT7/6201 input, 6SN7 or 12SN7 output

The TAS reviewer said: The microZOTL2.0 is one of the few headphone amplifiers that can truly deliver an emotionally charged listening experience. Since the microZOTL2.0 is sold direct to the public, without the usual dealer markup, it represents an uncommonly good deal. But it’s more than simply a question of money. Here, for the first time, via ZOTL technology, it is possible to experience the magic of a 6SN7 “power” tube. This may sound like a TV commercial, but the new and improved microZOTL outshines the original. That should not come as a surprise given the use of enhanced passive parts and better tubes. To my mind, the microZOTL2.0 is the pinnacle of desirability when it comes to headphone amplifiers.

The Stereophile Reviewer said: Conclusions
I am a major fan of fusion audio components. Now that LPs are truly back, and DACs are getting smaller and improving with extreme rapidity, components like Linear Tube Audio's microZOTL2.0 seem prophetic—equally at home in desktop systems or full-scale audiophile rigs. Almost unbelievably, the microZOTL2.0 delivered top-level sound quality as: a 1W integrated amplifier; a line stage that, because of its radical transparency, would hold its own in a cost-no-object system; and a headphone amplifier that could hold its own at thrice the price. Highly recommended times three!