Instruction/ maintenance manual of the product STEREO TUBE PREAMP Nilfisk-ALTO
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MICtube STEREO TUBE PREAMP User's Manual www .altoproaudio.com V ersion 2.3 September 2005 English.
1 SAFETY RELA TED SYMBOLS CAUTION RISK OF ELECTRIC SHOCK DO NOT OPEN This symbol, wherever used, alerts you to the presence of un-insulated and dangerous voltages within the product enclosure. These are voltages that may be sufficient to constitute the risk of electric shock or death.
2 Do not install this product near any direct heat source. Do not block areas of ventilation. Failure to do so could result in fire. Keep product away from naked flames. IMPORT ANT SAFETY INSTRUCTIONS Read these instructions Follow all instructions Keep these instructions.
Preface 3 Dear Customer , . Thank you very much. L TO AUDIO TEAM Thanks for choosing L TO Stereo T ube Preamplifier and thanks for choosing one of the results of L TO AUDIO TEAM job and researches. For our L TO AUDIO TEAM, music and sound are more than a job.
4 T ABLE OF CONTENT 1. INTRODUCTION ............................................................................................5 2. FEA TURE LIST ..............................................................................................5 3. CONTROL ELEMENTS .
1. INTRODUCTION 5 Half rack space Robust and Compact design Dual Servo Microphone Preamplifier 20dB pad +48V phantom power Phase Reverse 8-Digit Output Level meter 12AX7W A Low Noise Tubes Output sect.
6 a. Guidepost of the front panel (1) Power LED (2) CHANNEL 1 Output Level Display LED (3) CHANNEL 2 Output Level Display LED (4) Phantom Power Switch (5)(6) Phase Reverse Switch (7)(8) 20dB P AD (9)(10) Combination Microphone (XLR) and Instrument (1/4 inch) input (1 1)(13) Input Gain Control (0 to 30 dB) (12)(14) Drive Control (0 to 40 dB) b.
3.2 The Rear Panel 7 - Drive (12 for CHANNEL 1 and 14for CHANNEL 2): a. Power Supply Connection Please use the 18V AC AC/AC Adaptor provided by L TO to connect your MICtube. Detail your can follow the illustration. 18V AC b. Analogue Inputs / Outputs The Output XLR Connector is servo balanced and operates at +4dBu.
4. INST ALLA TION & CONNECTION: 4.1 Mains Connection - Please ensure that the L TO MICtube Stereo Microphone Preamplifier is connected to the correct supply voltage before operating this unit. - Only use the 18V AC AC/AC Adaptor provided by L TO. 4.
9 4.3 Rack Mounting 5. APPLICA TIONS 5.1 The MICtube as icrophone reamplifier AM P Unbalanced Balanced Tip Ring Sleeve Tip Ring Sleeve Tip Sleeve Tip Sleeve Tip Sleeve Cent e r Cent e r Centre Screen .
10 5.2 The MICtube as Direct-Injection ox (DI Box) AB When audio signals produced by instruments such as guitars, keyboards, etc. are transported over long unbalanced lines, the transmission quality may be affected by Hum or other interference signals included in the cable.
11 1 2 3 4 A B C D 4 3 2 1 D C B A 1 2 3 4 5 6 X1 X2 X3 2 1 3 4 2 1 3 22 11 33 B Block Diagram U1(INA163) TUBE-12AX7 2 1 3 2 3 22 33 2 1 3 1 2 3 4 5 6 X1 X2 X3 POWER SUPPL Y AC18V +12VDC +15VDC -15VDC.
12 6.2 Specifications XLR Impedance 1/4" High Z Connectors Phase Reverse 20dB Pad +48V Phantom Power XLR Balanced 1/4" Unbalanced T ube Drive Gain Power Supply Rejection Amplifier T ype THD .
13 7. W ARRANTY 1. W ARRANTY REGISTRA TION CARD T o obtain Warranty Service, the buyer should first fill out and return the enclosed W arranty Registration Card within 10 days of the Purchase Date.
14 3.5 In no event shall be liable for any incidental or consequential damages. Some LT O states do not allow the exclusion or limitation of incidental or consequential damages, so the above exclusion or limitation may not apply to you.
NF00870-2.3 No. 1, Lane 17, Sec. 2, Han Shi West Road, T aichung 40151 T aiwan http://www .altoproaudio.com T el: 886-4-22313737 email: alto@altoproaudio.com Fax: 886-4-22346757 c All rights reserved to AL TO. All features and content might be changed without prior notice.
An important point after buying a device Nilfisk-ALTO STEREO TUBE PREAMP (or even before the purchase) is to read its user manual. We should do this for several simple reasons:
If you have not bought Nilfisk-ALTO STEREO TUBE PREAMP yet, this is a good time to familiarize yourself with the basic data on the product. First of all view first pages of the manual, you can find above. You should find there the most important technical data Nilfisk-ALTO STEREO TUBE PREAMP - thus you can check whether the hardware meets your expectations. When delving into next pages of the user manual, Nilfisk-ALTO STEREO TUBE PREAMP you will learn all the available features of the product, as well as information on its operation. The information that you get Nilfisk-ALTO STEREO TUBE PREAMP will certainly help you make a decision on the purchase.
If you already are a holder of Nilfisk-ALTO STEREO TUBE PREAMP, but have not read the manual yet, you should do it for the reasons described above. You will learn then if you properly used the available features, and whether you have not made any mistakes, which can shorten the lifetime Nilfisk-ALTO STEREO TUBE PREAMP.
However, one of the most important roles played by the user manual is to help in solving problems with Nilfisk-ALTO STEREO TUBE PREAMP. Almost always you will find there Troubleshooting, which are the most frequently occurring failures and malfunctions of the device Nilfisk-ALTO STEREO TUBE PREAMP along with tips on how to solve them. Even if you fail to solve the problem, the manual will show you a further procedure – contact to the customer service center or the nearest service center
