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Summary of Contents for TL Audio Ebony A1
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Page 1: User Manual
T L Audio User Manual Ebony Series A1 Dual Pre-Amp TL Audio Limited, Letchworth, England. Tel 01462 492090, Fax 01462 492097. www.tlaudio.co.uk email: info@tlaudio.co.uk... -
Page 2: Table Of Contents
TABLE OF CONTENTS..........................1 INTRODUCTION ............................2 -A?............................2 LASS ?..............................3 UBES I/O?..........................3 ALANCED A1 D ..........................3 PRECAUTIONS ............................5 BLOCK DIAGRAM............................6 INSTALLATION............................7 AC Mains Supply............................. 7 Audio Inputs............................. 7 Instrument Inputs............................. 8 Outputs..............................8 Ventilation.............................. -
Page 3: Introduction
INTRODUCTION New from TL Audio, The Ebony Series is a sleek looking range of discrete Class A processors designed to heighten your audio experience. The range consists of 3 units, all of which use Discrete Class A circuitry and have an optional tube stage with variable drive putting you in control of how ‘creamy’... -
Page 4: Why Tubes
The range is also compatible with unbalanced equipment, as described above. The A1 Dual Pre-Amp. The Ebony Series A1 Pre-Amp features two independent channels, with each channel offering mic and instrument inputs. - Page 5 The block diagram of one of the channels is shown in fig.1. A discrete Class A electronically balanced mic input amplifier is used, delivering superior audio performance with very low noise, low distortion and wide bandwidth. The mic input is suitable for low impedance (150-600 ohm) microphones, with a gain control range of +16 to +60dB.
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Page 6: Precautions
PRECAUTIONS The T L Audio Ebony Series units require 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 mains operating voltage stated on the rear panel is correct before connecting to the mains supply,... -
Page 7: Block Diagram
BLOCK DIAGRAM. -
Page 8: Installation
INSTALLATION AC Mains Supply. The unit is fitted with an internationally approved 3 pin IEC connector. A mating socket with power cord and mains plug is supplied. All mains wiring should be performed by a qualified electrician with all power switched off, and the earth connection must be used. -
Page 9: Instrument Inputs
in a loss of level and/or increased noise. Good quality screened cable should be used, particularly for microphone or low level sources, to prevent hum or noise pickup. Instrument Inputs. A 2 pin (mono) jack plug is required, which should be wired as follows: - Tip = Signal Phase (“+”... -
Page 10: Operation
OPERATION. Microphone Input The 2 XLR mic inputs are at the rear of the Ebony A1. Virtually any low impedance professional microphone can be used. Condenser microphones will require the 48V phantom power button to be engaged for correct operation, but before using Dynamic and Ribbon microphones ensure that the phantom power is switched off. -
Page 11: Tube Stage Drive And Peak Leds
Tube Stage Drive and Peak LEDs. These LEDs indicate the drive level to the tube, or valve, stage. The Drive LED is a variable intensity indicator, starting to glow when the tube harmonic distortion is around 1%, and being fully illuminated at approximately 5% harmonic distortion. The distortion is predominately second harmonic, unless very high drive levels are used, in which case the tube is eventually pushed into harsher saturation, indicated by the tube Peak LED. -
Page 12: Getting Started
This variation in tone is one of the great strengths of the Ebony A1 - you have the option of running it very clean, or nice and warm as you increase the valve drive via the ‘Tube Warmth’ control. -
Page 13: Mic Input
SPECIFICATION. Mic Input: Discrete Class A circuitry from input to output (unless Tube stage In). Gain Range: +16dB to +60dB (-14dB to +30dB with pad), Maximum Input level: +10dBu (without pad), +30dB (with pad), Frequency Response: 10Hz to 40KHz, +0, -0.5dB, @ 40dB gain, Distortion (THD + Noise): 0.025%, 20Hz to 20KHz @ 40dB gain, Noise (EIN): -127dBu unweighted, 22Hz to 22KHz, 150 ohm source termination. -
Page 14: Tube Stage
Tube Stage: Typical Distortion: 1% to 10%, depending on “Drive” level, predominately second harmonic. Noise: -80dBu (22Hz to 22KHz), output gain @ 0dB. Metering: Tube “Drive” LED: Variable intensity over 10dB level range, typically corresponding to 1% to 5% THD. Tube “Peak”... -
Page 15: Service
Please record the following details, and retain proof of purchase date: Serial Number......Date purchased......Dealer......... TL Audio Limited, Letchworth, England. Tel: 01462 490600. International +44 1462 490600 Fax: 01462 490700. International +44 1462 490700 www.tlaudio.co.uk email: info@tlaudio.co.uk...
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