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HEADPHONE AMPLIFIER, PREAMP, & STEREO AMPLIFIER
WARNING: For safety, the cover of this amplifier should be secured at all times. DC
voltages as high as 450V and peak AC voltages as high as 800V are present inside. The service
information contained in this manual is intended only for trained service personnel. Furthermore,
this amplifier generates radio-frequency energy that can interfere with communications
equipment.
Quick Start Guide
-Remove the amp and power supply from the box and bags.
-Plug the AC cable into the power supply and into an outlet.
-The DC cable will have one end with a locking connector and one end with a plain connector. The
locking connector attaches to the back of the amp, where you should screw it securely but not as tight as
you can onto the threads of the DC jack.
-Insert the non-locking end of the DC cable into the DC jack on the power supply.
-Turn on the power supply using its toggle switch (if you are outside the US, make sure the voltage is set
correctly on the linear power supply, which is visible directly above the IEC connector).
-Turn on the amp with the power button on the faceplate. You may want to attach interconnects or
speakers before powering on, but it isn't necessary. If you are using the MZ2/MZ2-S as a preamp, it is
best to have your power amp off (and necessary to have it off if it is a DC-coupled amp) when
powering on and connecting the MZ2/MZ2-S, to avoid off/on transients. Please read this entire guide if
using a DC-coupled power amp.
Introduction
The MicroZOTL2.02.0 is a high quality Class A tube headphone amplifier utilizing ZOTL (Zero-
hysteresis Output Transformer-Less) technology. Additional uses of MicroZOTL2.0 include
tweeter amplifier, preamplifier, and high-efficiency speaker amplifier recommended for small
rooms or desktop setups.
Features
• External power supply – extremely low noise floor
• More than enough power for standard headphones
• Drives all types of dynamic and planar headphones of any impedance
MZ2/
MZ2-S
USER GUIDE
Linear Tube Audio
Takoma Park, MD, USA
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Table of Contents
Summary of Contents for microZOTL MZ2
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Page 1: User Guide
-Turn on the amp with the power button on the faceplate. You may want to attach interconnects or speakers before powering on, but it isn’t necessary. If you are using the MZ2/MZ2-S as a preamp, it is best to have your power amp off (and necessary to have it off if it is a DC-coupled amp) when powering on and connecting the MZ2/MZ2-S, to avoid off/on transients. - Page 2 100VAC to 240VAC, or from 50Hz to 60 Hz. Power consumption is 33 watts. *The linear power supply that comes with the MicroZOTL2.0 Deluxe and MZ2-S requires a manual switching from 115V to 220V, which can easily be done without opening the power supply case.
- Page 3 Burn in Units sometimes are sent to customers without having been fully burned in. After about 80-100 hours of use, the MicroZOTL2.0 should be fully burned in and sounding near its best. Rear View Speaker Outputs The amplifier outputs 1 watt (4 ohms). If your speakers are 90db efficiency or higher, speakers can be driven to a surprising volume with only a watt.
- Page 4 Front View Dual Inputs* There are two inputs that are switched with toggle switch in the front, labeled “1” and “2”. The inputs are connected using the two pairs of RCA jacks on the back of the unit labeled “Input 1”...
- Page 5 2 and 4. If you accidentally plug a 12 volt tube into a microZOTL configured for 6 volts, it won’t hurt it, it just won’t work. If you accidentally plug a 6 volt tube into a 12 volt heater, it will glow very brightly and will burn out in a few minutes.
- Page 6 Technology In 1996 David Berning developed a new and technically advanced vacuum tube architecture designated as ZOTL. ZOTL stands for Zero-Hysteresis Output-Transformer-Less amplifiers. The ZOTL architecture eliminated the problematic sound quality issues that audio-output transformers caused. Since ZOTL technology was introduced in 1996, the MicroZOTL2.0 amplifier has the lowest power output of all ZOTL amps so far.
- Page 7 (including connectors) • Net weight: 2.5 kg (5.3 lb) • Finish: Aluminum case with acrylic cover • Tube complement: two 12AT7 and two 6SN7 (The MZ2-S uses two 12AT7 (shipped with 6201/12AT7 equivalents) tubes and two 12SN7 tubes) Limited One-Year Warranty* 1.
- Page 8 2. Any units returned for warranty repair must be shipped prepaid after receiving return authorization. For safe handling, and if at all possible, the unit should be shipped in its original carton. If such is not possible, the unit should be well packed with particular attention paid to protection of all corners and avoidance of any looseness in the carton.
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