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Linear Tube MICROZOTL2.0 HEADPHONE AMPLIFIER and Preamp w/ Linear Tube Power Supply

Hand-built using quality premium components, the MicroZOTL2.0 headphone amplifier and preamp delivers stunning, award-winning realism and sound quality designed to last a lifetime. RETAIL $1695 MINT DEMO $1499

$1499 Floor Sample

The MicroZOTL2.0 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, stunningly realistic experience wherever it's plugged in.

Originally manufactured from 2000 to 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, external power supply to further eliminate noise.

At 1-watt per channel output, the MicroZOTL2.0 can easily drive even low-efficiency planar type headphones. For example, the MicroZOTL2.0 drives the HIFIMAN HE1000 headphones with power to spare.

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

The MicroZOTL2.0 can even drive efficient speakers via its speaker outputs (89db or higher sensitivity) to moderate levels in offices, bedrooms and other small rooms.

The MicroZOTL2.0 comes in black or midnight blue.


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 and 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 far more expensive amplifiers
No heavy power or audio transformers
Patented power supply & impedance conversion technology
Optimized tube life expectancy of 10 - 20 years based on use
One year warranty including tubes (international pays shipping)


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
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: 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)
Net weight: 5.35 lbs (2.5 kg) - amplifier and external power supply)
Finish: Aluminum case w/ lexan top
Tube complement per channel: 12AT7 input, phase splitter, 6SN7 p-p output