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Summary of Contents for TL Audio Ebony A2
- Page 1 T L Audio User Manual Ebony Series A2 Stereo Processor TL Audio Limited, Letchworth, England. Tel 01462 492090, Fax 01462 492097. www.tlaudio.co.uk email: info@tlaudio.co.uk...
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Page 2: Table Of Contents
TABLE OF CONTENTS TABLE OF CONTENTS..........................1 INTRODUCTION ............................2 -A?............................2 LASS ?..............................3 UBES I/O?..........................3 ALANCED A2 S ........................4 TEREO ROCESSOR PRECAUTIONS ............................5 BLOCK DIAGRAM............................6 INSTALLATION............................7 AC Mains Supply............................. 7 Audio Inputs............................. 7 Outputs. -
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
Why Tubes? Valves - or “Tubes” - have long been associated with excellent audio quality, recognised as adding “warmth” or “depth” to a signal. Driving the valves harder results in an increasing level of mainly second harmonic distortion, which is responsible for the characteristic overdriven valve sound. -
Page 5: The A2 Stereo Processor
The A2 Stereo Processor. The Ebony Series A2 Processor is a dedicated stereo unit, providing gain and phase control, compression and equalisation. A tube stage is available to each signal path, with variable drive control. The block diagram of the unit is shown in fig.1. -
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: Outputs
in a loss of level and/or increased noise. Good quality screened cable should be used, to prevent hum or noise pickup. Outputs. The outputs are via balanced, 3 pin male XLR connectors. The mating connectors should be wired as follows: - Pin 1 = Ground (screen), - Pin 2 = Signal Phase (“+”... -
Page 10: Operation
OPERATION. Input Gain stage The input gain sets the levels of the line level signals coming in to the Ebony A2. Increasing the input gain control setting will also have a pronounced effect on the amount of compression, as the threshold will remain constant as the input level increases. -
Page 11: Overview Of Compressor Operation
With the Ebony A2, you have pristine Discrete Class A audio with the added benefit of a valve stage that can be activated into the input stage of the signal path, this then offers a warmth, clarity and presence just not obtainable with solid state or digital products. -
Page 12: Attack And Release
A slow release time should be used if distortion is still experienced. Knee The Knee switch enables the Ebony A2 to be operated in two different modes - soft Knee or hard Knee. Soft knee mode offers a gentle compression curve around the threshold point, and is traditionally employed to yield a more subtle, musical type of compression effect. -
Page 13: Compressor On
EQ section, and greatly boosting one or more bands can cause the red Peak LED to illuminate as the Ebony A2 is driven towards clipping. In this case you need to compensate by bringing down the Ebony A2 output gain control until the Peak LED is extinguished. -
Page 14: Eq On
This control effectively acts like an output fader, and is very useful when recording direct to tape or hard disc through the Ebony A2. You may find that some digital recorders require a good deal of input level in order to register a 0dB reading on their meters (+18dBu analogue usually matches 0dBFS in the digital domain). -
Page 15: Digital Output
Digital Output. The digital output is an option for the Ebony A2. The card converts the analogue signal at 24-bit resolution and is selectable to 44.1 or 48 kHz sample rates. The digital connector is a coaxial SPDIF format on an RCA phono type connector. The card also has a word clock BNC connector for clocking to an external digital source. -
Page 16: Using As An Inserted Dynamic Effect
The A2 can be used as an insert into a mixing console for dynamic processing or as a mixdown compressor / EQ, or simple mastering solution. Using as an inserted dynamic effect Many mixers have sockets called ‘insert points’, which allow processors such as dynamics devices and EQs to be patched in-line into the mixer signal path at various points. - Page 17 Now we’ll assume that the A2 is connected via its line inputs/outputs to the master insert points of a mixer. 1. The first stage is to set up the gains of the A2. With the compressor and EQ stages switched out, start with the A2 input gain at minimum and output gains at 0dB.
- Page 18 reduced. By switching the compressor ‘in’ and ‘out’, you can compare the levels and the subjective sound quality of the original and compressed signals. With the compressor active, use the Gain Make- Up control to set the level so that when disabling the compressor, there is no level drop.
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Page 19: Specifications
SPECIFICATIONS Line Inputs: Discrete Class A circuitry from input to output (unless Tube stage In), Gain Range: -20dB to +20dB, Maximum Input level: +26dBu, Frequency Response: 10Hz to 40KHz, +0, -0.5dB, Distortion: 0.007% @ 1KHz, +4dBu @ 0dB gain, Distortion (THD + Noise): 0.025%, 10Hz to 40KHz, Noise: -94dBu, 22Hz to 22KHz, @ 0dB gain at input and output. -
Page 20: Equaliser
Equaliser: LF: +/-15dB @ 80Hz, shelving, Mid: +/-15dB, swept 150Hz to 7KHz, Q = 0.7, HF: +/-15dB @ 12KHz, shelving, “Pre” and “Sidechain” (Compressor) switches. Metering: Tube “Drive” LEDs: Variable intensity over 10dB level range, typically corresponding to 1% to 5% THD. Tube “Peak”... -
Page 21: 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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