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Owner’s Manual OTL Tube Headphone Amplifier/Preamplifier with USB DAC www.lab12.gr manual v1.6...
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Lab12 hpa- OTL Tube Headphone Amplifier/Preamplifier with USB DAC Table of Contents It is yours…………………………………………………………… Unpacking and Warnings………………………………….. Features……………………………………………………………… Installation & Placement……………………………………. Front Panel…………………………………………………………. Rear Panel………………………………………………………….. Main connections……………………………………………….. For the safety of your equipment……………………… Specifications…………………………………..………………… Page 2 of 8...
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Do not forget that your hpa is totally handcrafted with perfectly matched parts of the finest selections. In order to reach the optimal performance your hpa needs at least 150 hours of listening. In this time all components go from “burn in” period to stable.
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You should never place another component directly on top of this device. Make sure that your hpa has an adequate flow of air around it. Hpa could be warm in some points; this is normal and within parts’ specifications.
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Lab12 hpa- OTL Tube Headphone Amplifier/Preamplifier with USB DAC Front Panel HPA Front panel In the front panel you will see three indication LEDs, a VU meter, the Volume control and the headphone output. The center LED (C) indicates that the device is powered on.
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Lab12 hpa- OTL Tube Headphone Amplifier/Preamplifier with USB DAC Rear Panel HPA Rear panel In the rear panel you will find the connection inputs and outputs. On the left side you will find the Input selector knob (A). You can select between a USB and two analog inputs (1, 2).
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Volume before connecting your headphones. Note The coaxial spdif output and the USB LEDs (E) and (D) are active even if the hpa is turned off, so you can use it only for USB to Coaxial spdif converter.
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Make sure that all your equipment is turned off before any connection. ! To avoid damaging your speakers you must turn on hpa some seconds before turning on your power amplifier and turn it off some seconds after turning off your power amplifier.
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