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ZOTL40 Reference
USER GUIDE:
Linear Tube Audio
Takoma Park, MD, USA
301-448-1534
hifi@lineartubeaudio.com
WARNING: For safety, the cover of this amplifier should be secured
at all times.
This amplifier contains extremely high voltages and the user should
not attempt to service the amplifier.
Furthermore, this amplifier
generates radio-frequency energy that can interfere with
communications equipment.
Introduction
The ZOTL40 Reference is a Class AB tube amplifier utilizing ZOTL
(Zero-hysteresis Output Transformer-Less) technology. It is a stereo
power amplifier that can also be used in a mono-block
configuration.
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Summary of Contents for Linear Tube Audio ZOTL40 Reference
- Page 1 Introduction The ZOTL40 Reference is a Class AB tube amplifier utilizing ZOTL (Zero-hysteresis Output Transformer-Less) technology. It is a stereo power amplifier that can also be used in a mono-block configuration.
- Page 2 7. Linear Tube Audio reserves the right to improve or change its products without obligation to modify previously manufactured units.
- Page 3 Specifications Circuit Type: Push-Pull Class AB Power Output: 51W (4 Ohm), 46W (8 Ohm) Input Sensitivity: 1.2V RMS for full output Input Impedance: Output impedance: 1.6 Ohms Gain: 23dB Noise: -94dB Frequency Response: +0dB, -.5dB, 8Hz-50kHz Input Voltage: Universal Tube Complement: (2x) 12AU7, (2x) 12AX7, (4x) EL34 Size: W: 17”...
- Page 4 (see Operating Modes for more information) Attach the power cable to the IEC connector and plug into an outlet. The ZOTL40 Reference uses a Berning-designed auto- switching power supply and can be used universally. Hook up your source and speakers.
- Page 6 Operating Modes MONO/STEREO Switch: Two ZOTL40 Reference amplifiers can be operated as mono-blocks, which deliver approximately 1.7x the power into 8 Ohms. To operate in the mono mode: 1. Set the MONO/STEREO switch to Mono. 2. Use the left RCA input.
- Page 7 Tubes The ZOTL40 Reference is supplied with selected vintage tubes including old-stock Mullard EL34s. The tubes operate at low current, which allows them to have an extended life. Changing tubes: EL34: The power tubes are self-biasing and do not need to be matched for gain.
- Page 8 NOTES...
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