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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: [email protected]

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Содержание Ebony A1

Страница 1: ...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...

Страница 2: ...7 Audio Inputs 7 Instrument Inputs 8 Outputs 8 Ventilation 8 OPERATION 9 Microphone Input 9 Instrument Input 9 Input Gain 9 30dB Pad Switch 9 Phantom Power 9 Tube Stage Drive and Peak LEDs 10 Output...

Страница 3: ...fers superior analogue processing to accompany a digital world Why Class A Class A circuits are designed with a constant current flowing through all of the transistors which is sufficient to drive the...

Страница 4: ...phase connections which form a differential pair independent of the ground or earth connection Noise particularly mains hum and high frequency interference can often be present in unbalanced systems d...

Страница 5: ...d a dedicated valve input stage Phase reverse and high pass filter switches are provided affecting both mic and instrument inputs The tube stage has a variable drive control with the signal level indi...

Страница 6: ...rved 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 Never oper...

Страница 7: ...6 BLOCK DIAGRAM...

Страница 8: ...taken to an approved service centre Alternate supply voltages may also require a different power cable or mains plug If in doubt consult local electrical regulations Warning attempted operation on the...

Страница 9: ...as follows Pin 1 Ground screen Pin 2 Signal Phase or hot Pin 3 Signal Non Phase or cold If an unbalanced output is required pins 1 and 3 should both be connected to ground Ventilation The unit generat...

Страница 10: ...normal to have to apply larger amounts of gain for less sensitive microphones such as dynamic types and similarly apply much less input gain for high output condenser mics some of which may even need...

Страница 11: ...nic 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...

Страница 12: ...hould now start to hear some sound and as the output is increased the red signal LEDs will start to illuminate Set the output level to a comfortable level so that you are getting a good metered level...

Страница 13: ...Distortion THD Noise 0 025 20Hz to 20KHz 40dB gain Noise EIN 127dBu unweighted 22Hz to 22KHz 150 ohm source termination Instrument Input Tube input stage plus discrete Class A circuitry to output Gain...

Страница 14: ...Bu on output VU Meter Switchable to Channel 1 or 2 and Input or Ouput Nominal calibration 0VU 4dBu 10dB switch calibration 0VU 14dBu Power Requirements Internally set to 230V 50Hz or 115V 60Hz operati...

Страница 15: ...hip will be repaired free of charge The warranty excludes damage caused by deliberate or accidental misuse tampering operation on the incorrect mains voltage or without the correct type and value of f...

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