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Summary of Contents for T L Audio INDIGO Series
- Page 1 T L Audio INDIGO SERIES User Manual VP-2051 VALVE VOICE PROCESSOR Tony Larking Professional Sales Limited, Letchworth, England. interstage Phistersvej 31, 2900 Hellerup, Danmark Telefon 3946 0000, fax 3946 0040 www.interstage.dk - pro audio with a smile...
- 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 VP-2051 is a single channel valve voice processor, combining a high quality microphone pre-amplifier, four band equaliser and a compressor.
- Page 3 PRECAUTIONS The T L Audio VP-2051 Voice Processor 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 Audio Inputs. Microphone Input. The microphone input is via 3 pin female XLR connector, suitable for balanced or unbalanced microphones. 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 - Pin 3 = Signal Ground When using unbalanced signals, the signal ground may be obtained by linking pins 1 and 3 in the mating XLR connector. If this connection is not made, a loss in level may result. Unbalanced Line Inputs. An unbalanced line level input at a nominal level of -10dBu is also provided, on a 0.25”...
- Page 7 to preserve the signal path through the insertion point. When used in this manner, the send will be post- compressor. Balanced Output. 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 (“+”...
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Page 8: Operation
The voice processor may be free standing, or mounted in a standard 19” rack. 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. - Page 9 Line Input. A line level signal should already be at about the correct operating level, but this may be checked by bypassing the compressor (i.e. turning off the COMP IN switch) and monitoring the level on the bargraph meter. The input gain should be adjusted until the 0dB LED is illuminated on music of normal loudness, with the red LEDs illuminating occasionally on higher volume peaks.
- Page 10 Aux Input. The front panel auxiliary input sockets may be switched between high level signals (“LO GAIN”, suitable for active guitars and keyboards) and low level signals (“HI GAIN”, suitable for microphones, pick ups or passive guitars), and are also controlled by the input gain control. LF Cut Filter.
- Page 11 A common use of sidechain equalisation is “de-essing” to reduce sibilance on vocals. Suitable equalisers which can be inserted into the sidechain are the TL Audio Indigo Series 2011 or 2012 valve equalisers, which match the 2051 in audio levels and styling.
- Page 12 The Compressor In switch allows the processing to be bypassed for comparison of the compressed signal (with any gain make up that has been applied), with the original signal. Stereo Operation. Two 2051 voice processors may be configured for stereo operation of the compressor section by inserting a Link cable between the two units.
- Page 13 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. The mid bands possess a low Q, wide bandwidth, response which results in effective equalisation without harshness, and this means that there is a good degree of overlap between the frequency options.
- Page 14 Master Level. The master level control is an output fader, which enables the voice processor output to be matched to the following equipment. The control is calibrated for 0dB at its centre, with a further 18dB of gain available by turning the knob fully clockwise.
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Page 15: 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 16 Switchable for high or low gain, plus 40dB gain variation. Maximum input level +18dBu. 2 pole 0.25” jack socket. Compressor: Threshold -20dBu to +20dBu, Attack 0.5msec or 20msec, Release 40msec or 2 seconds, Ratio 1:1.5 to 1:30, Gain Make-Up 0 to +20dB. Equaliser: LF Band: +/-12dB at 80Hz or 120Hz.
- Page 17 Unbalanced Outputs: Output impedance 47 ohms. Maximum level +18dBu into 10Kohms. 2 pole 0.25” jack socket. Frequency Response: 10Hz to 40KHz, +0, -1dB. Dynamic Range: 108dB (Line input @ 0dB gain). Sidechain Insertion Points: Unbalanced, switched 3 pin jack socket, tip = send, ring = return.
- Page 18 Weight: 4Kg. he above specifications are subject to change without notice.
- Page 19 SERVICE Should the processor require service, it must be taken or posted to an authorised dealer. Please retain the original packing for possible future use, and ensure the unit is suitably protected during transit. The manufacturer cannot accept responsibility for damage caused during transportation. The processor is supported by a limited warranty for a period of one year from the date of purchase.
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