Did we mention the stunning sound of the MicroZOTL2.0?

MicroZOTL2.0 Headphone Amplifier and Preamplifier

Hand-built using quality premium components, the MicroZOTL2.0 headphone amplifier delivers stunning, award-winning realism and sound quality designed to last a lifetime. The MicroZOTL2.0, manufactured by Linear Tube Audio, utilizes patented Zero hysteresis Output Transformer-Less (ZOTL) technology to eliminate the distortion and noise typically found in tube amplifiers. Performing at the theoretically correct turns ratio, a previously unheard of achievement, Linear Tube Audio’s MicroZOTL2.0 delivers an unparalleled, enlightening and stunningly realistic experience wherever it's plugged in.

Originally manufactured in 2000 till 2007 by David Berning, the original microZOTL has a reputation as one of the finest and most realistic headphone amplifiers ever made. Linear Tube Audio's reconfiguration of the original microZOTL amplifier lives up to its name and utilizes a highly refined, no feedback, Class A triode design with a separated power supply to eliminate noise.

The MicroZOTL2.0 can easily drive headphones from low-impedance planar types to high-impedance dynamics. For example, the MicroZOTL2.0 drives the HiFiMAN HE1000 headphones with power to spare and has no trouble with 600 ohm Beyerdynamics.

The MicroZOTL2.0 is also an excellent preamplifier. It has outputs that enable it to drive power amplifiers as a Class A preamplifier.

The microZOTL2.0 can drive efficient speakers via its speaker outputs (89db or higher sensitivity, depending on whether you're using a desktop or room-sized setup) to moderate levels in offices, bedrooms and other small rooms.

The MicroZOTL2.0 comes in black or midnight blue.

Features

Designed by David Berning - one of the world’s premier amplifier designers
Hand-made in Washington, DC
External power supply - extremely low noise floor
Drive low efficiency planar headphones easily
Drive high efficiency speakers (89 db efficiency or higher) to adequate volume
Transparent cover
Universal voltage 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
Same technology & tone as more expensive Berning amplifiers
No heavy power or audio transformers
Patented impedance conversion technology
Optimized tube life expectancy of 10 - 20 years based on use
One year warranty

Premium Components

Tung-Sol Russian vacuum tubes
Locking Neutrik headphone jack with silver contacts
Silver coated copper wire with teflon insualtion
ALPS volume control
Hand-wound coils and impedance converters
Gold connectors throughout audio signal path

Specifications

Amplifier class: Push-pull Class A, no feedback
Sensitivity: 0.6V RMS for full output
Output impedance: (measured at 0.5A, 60 Hz) 2 ohms
Input impedance: 50k
Power Supply Input: Auto-switching 100V / 120V / 220/ 240V operation
Power Supply Output: 12VDC, 2.5A
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: 7 7/8 inches (19.7 cm) deep, 9 1/2 inches (24.1 cm) wide, 4 3/4 inches (12 cm) tall (including connectors)
Net weight: 5.35 lbs. (total amplifier and external power supply)
Finish: Aluminum case with lexan top
Tube complement per channel: 12AT7 input, phase splitter, 6SN7 p-p output