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Summary of Contents for T L Audio INDIGO EQ-2011 Series
- Page 1 T L Audio INDIGO SERIES User Manual EQ-2011 VALVE EQUALISER 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 EQ-2011 is a two channel valve equaliser. Four bands of EQ are provided on each channel, each with a switched frequency selection to cover the full audio bandwidth.
- Page 3 PRECAUTIONS The T L Audio EQ-2011 Valve Equaliser 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...
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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 Each channel has a female, 3 pin XLR connector, suitable for balanced or unbalanced line sources at a nominal level of +4dBu. The mating connector should be appropriately wired as follows for balanced or unbalanced operation: Balanced inputs: - Pin 1 = Ground (screen). - Pin 2 = Signal Phase (also known as “+”...
- Page 6 Balanced Outputs. The output is via a balanced, 3 pin male XLR connector. The mating connector should be wired as follows: - Pin 1 = Ground (screen), - Pin 2 = Signal Phase (“+” or “hot”), - Pin 3 = Signal Non-Phase (“-” or “cold”). Unbalanced Outputs.
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Page 7: Operation
OPERATION. Front Panel. The front panel controls are identified in fig.2. Input Gain. The input gain of the equaliser may be varied over a range of +/-20dB, which combined with the different sensitivity inputs, provides adequate and precise control of signal level. Generally, enough gain should be applied to make the peak LED glow on the louder sections of music, without causing the LED to illuminate brightly for an extended time. - Page 8 LM Band. The LM (Low-Mid Frequency) band has a peaking characteristic - i.e. it boosts or cuts a section of the audio spectrum around its selected centre frequency only. A four position rotary switch is used to select the centre frequency to 250Hz, 500Hz, 1KHz or 2K2Hz.
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Page 9: Specifications
SPECIFICATIONS Balanced Line Input: Electronically balanced, unbalanced compatible, with input impedance greater than 5Kohm. Gain range -20dB to +20dB. Nominal input level +4dBu. Maximum input level +26dBu. 3 pin female XLR connector. Unbalanced Input: Input impedance greater than 5Kohm. Gain range -20dB to +20dB. Nominal input level -10dBu. - Page 10 HF Band: +/-12dB at 8KHz or 12KHz. Shelving response. Balanced Outputs: Electronically balanced, unbalanced compatible. Nominal level +4dBu. Output impedance 47 ohms. Maximum level +26dBu. 3 pin male XLR connector. Unbalanced Outputs: Output impedance 47 ohms. Nominal level -10dBu. Maximum level +18dBu into 10Kohms. 2 pole 0.25”...
- Page 11 Detachable 3 pin IEC connector, mating connector and cable supplied. Front panel On/Off switch with green LED. Dimensions: 19” rack mounting, 1U high. 483mm wide x 44mm high x 250mm deep. Weight: 4Kg. he above specifications are subject to change without notice. SERVICE Should the equaliser require service, it must be taken or posted to an authorised dealer.
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