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Summary of Contents for TL Audio PA-2001 VALVE
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Page 1: User Manual
T L Audio INDIGO SERIES User Manual PA-2001 VALVE PRE-AMPLIFIER Tony Larking Professional Sales Limited, Letchworth, England. Tel: 01462 490600. International +44 1462 490600. Fax: 01462 490700. International +44 1462 490700. - Page 2 INTRODUCTION The T L Audio Indigo Series combines classic valve techniques with low noise solid state circuitry to produce audio processing units offering very high quality signal paths with comprehensive control facilities and the unique valve sound. The PA-2001 is a four channel valve microphone pre-amplifier. Featuring very low noise and an exceptionally wide bandwidth, it provides continuously variable input and output gain controls, high pass filter and phase reverse switches, and independently switched +48V phantom power.
- Page 3 PRECAUTIONS The T L Audio PA-2001 Pre-Amplifier requires very little installation, but like all electrical equipment, care must be taken to ensure reliable, safe operation. The following points should always be observed: - All mains wiring should be installed and checked by a qualified electrician, - Ensure the correct operating voltage is selected on the rear panel before connecting to the mains supply,...
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Page 4: Installation
INSTALLATION AC Mains Supply. The unit is fitted with an internationally approved 3 pin IEC connector. A mating socket with power cord is provided with the unit, wired as follows: Brown: Live. Blue: Neutral. Green/Yellow: Earth (Ground). All mains wiring should be performed by a qualified electrician with all power switched off, and the earth connection must be used. - Page 5 Microphone Inputs. Each channel has a female, 3 pin XLR connector, suitable for balanced low impedance (150 to 600 ohm) microphones. The mating connector should be wired as follows: - Pin 1 = Ground (screen). - Pin 2 = Signal Phase (also known as “+” or “hot”). - Pin 3 = Signal Non-Phase (“-”...
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Page 6: Operation
Rear Panel. The rear panel connectors are identified in fig.3. Make sure that all settings, mains and audio connections have been made as described above before attempting to operate the equipment. OPERATION. Front Panel. The front panel controls are identified in fig.2. Each of the four sections is identical. Phantom Power. - Page 7 Peak LED. Each channel is equipped with a red LED, which is intensity modulated to indicate the signal level in the valve stages. Reducing the input gain will result in the peak LED illuminating later. However, reducing the output level will have no affect on the peak LED, although it will, of course, reduce the output signal level.
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Page 8: Specifications
SPECIFICATIONS Microphone Input: Electronically balanced. Input impedance greater than 2Kohm. Gain range +10dB to +60dB. Noise -127dBu (EIN with 150 ohm source, 22Hz - 22KHz and maximum gain). 3 pin female XLR connector. Phantom Power: +48V at 10mA maximum per microphone. High Pass Filter: -3dB at 90Hz, 12dB per octave. - Page 9 Power Requirements: Rear panel selectable for 220-240V 50Hz or 110-120V 60Hz operation. Rear panel fuse 20mm, 1AT, 250V. Power consumption 30VA typical. Detachable 3 pin IEC connector, mating connector and cable supplied. Front panel On/Off switch with green LED. Weight: 4Kg.
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