David Berning Linear Tube Audio ZOTL40 Power Amplifier NEW

Performing at the theoretically correct turns ratio, Linear Tube Audio’s ZOTL40 delivers a previously unattainable, unparalleled and stunningly realistic experience wherever it's plugged in.  Considered the only significant advance in tube circuitry since the 1960’s, ZOTL technology eliminates the output transformer in order to remove the inherent distortion found in transformer-type amplifiers.  

Perfect for high efficiency speakers, the ZOTL40 produces a much lower hum than most tube amplifiers and requires no adjustments since tubes are auto-biased.  With Russian Tung-Sol tubes, push-pull Class AB output stage, an Alps volume control and inputs for direct connection to high output sources, the ZOTL40 Power Amplifier delivers a potent, experience defining realism.


Designed by David Berning - one of the world’s premier amplifier designers
Hand-wound coils & impedance converters
40 watts per channel with little or no hum
Transformer-less design eliminates intermodulation distortion inherent in all transformer designs
Impedance converters simulate correct theoretical output transformer turns ratio
Low impedance output easily matches a wide range of speakers and cannot be damaged with no load
No adjustments – tubes are auto-biased
Automatic protection circuitry
High voltage turn on delay to maximize tube life
10 - 20 years tube life depending on use
Push-pull, Class AB output stage
No heavy power or audio transformers
Universal voltage power supply (autosensing 100-240VAC 50/60Hz)
Has one input through Alps volume control for direct connection to high output sources
Second set of inputs bypass volume control for direct input


TUNG-SOL Russian vacuum tubes
Locking headphone jack w/ silver contacts
Silver-coated Teflon copper insulated wiring
Alps volume control
Hand-wound coils & impedance converters
Gold connectors throughout signal path
5-way gold binding posts  
High quality metal film resistors  

Hand-built in Washington, DC, with premium components, the ZOTL40 is available through Urban Hifi.