MICtube
STEREO TUBE PREAMP
User's Manual
www.altoproaudio.com
Version 2.3 September 2005
English
Page 1: ...MICtube STEREO TUBE PREAMP User s Manual www altoproaudio com Version 2 3 September 2005 English ...
Page 2: ...ould 1 result in damage to the product and External Connection Do not Remove any Covers Fuse To prevent fire and damage to the product use only the recommended fuse type as indicated in this manual Do not short circuit the fuse holder Before replacing the fuse make sure that the product is OFF and disconnected from the AC outlet Always use proper ready made insulated mains cabling power cord Failu...
Page 3: ...rician Protect the power cord and plug from any physical stress to avoid risk of electric shock Do not place heavy objects on the power cord This could cause electric shock or fire Cleaning When required either blow off dust from the product or use a dry cloth Do not use any solvents such as Benzol or Alcohol For safety keep product clean and free from dust Servicing Refer all servicing to qualifi...
Page 4: ... one confirming the quality of our job we would like to share with you our work and our dreams pay attention to your suggestions and your comments Following this idea we create our products and we will create the new ones From our side we guar antee you and we will guarantee you also in future the best quality and the best fruits of our continuous researches and the best prices Our MICtube Stereo ...
Page 5: ...ion b Analogue Inputs Outputs 4 INSTALLATION CONNECTION 8 5 APPLICATIONS 9 5 1 The MICtube as icrophone reamplifier A M P 5 2 The MICtube as Direct Injection ox DI Box A B 5 3 The as evel ranslator A L T MICtube 6 TECHNICAL SPECIFICATIONS 11 6 1 Block Diagram 6 2 Specifications 7 WARRANTY 13 4 1 Mains Connection 4 2 Audio Connection a Wiring Configuration b In Line Connection 4 3 Rack Mounting ...
Page 6: ... Stereo Microphone Preamplifier which is based on many years of experience and findings in amplifier technology and is used through the world in renowned studios sound reinforcement systems as well as in broadcast and televi sion studios The LTO MICtube meets highest and no compromise requirements in terms of operation sound specifications and workmanship The LTO MICtube is a half rack space unit ...
Page 7: ...are using an appropriate microphone before you activate this switch to supply the 48V phantom power Read the operating instructions accompanying the microphone Some condenser mics might need another type of power supply old dynamic microphones could be damaged by the 48V voltage and unbalanced microphones should never be operated in combination with a 48V power supply This Phase Reverse Switch rev...
Page 8: ...nts that have a built in preamp If you should require more signal out of the preamp for a hotter recording level cranking up the gain should provide all the signal that you ll need The effect achieved by this control can be subtle to extreme depending on the settings being used A warming up of the sound can be noticed at lower settings This desirable effect is especially good for microphones and o...
Page 9: ... loss Either the 1 4 TRS Tip Ring Sleeve phone jack or the XLR servo connector can be wired in balanced and unbalanced modes which will be determined by the actual application status Please wire your systems as the following examples For 1 4 Phone jack For XLR connector XLR Type alanced B XLR Type Unbalanced Pin3 Pin2 Pin1 Linked to Pin1 manually Pin1 Pin2 Pin3 TRS Type Balanced Tip Ring Sleeve TR...
Page 10: ...s icrophone reamplifier A M P Unbalanced Balanced Tip Ring Sleeve Tip Ring Sleeve Tip Sleeve Tip Sleeve Tip Sleeve Cent e r Cent e r Centre Screen Screen Screen 1 2 3 Tip Ring Sleeve 1 2 3 1 2 3 TIP SLEEVE TIP SLEEVE TIP RING SLEEVE TIP RING SLEEVE 1 2 3 ...
Page 11: ...erated with a nominal level of 10dBV while the level used in studios and other professional application is 0dBu or 4dBu So when you connect devices of both types to each other you should consider some kind of level translators of course The LTO MICtube as a Stereo Microphone Preamplifier is pretty suited for this application The Input Gain control allows you to raise or lower your input signal lev...
Page 12: ...1 INA163 TUBE 12AX7 2 1 3 2 3 22 33 2 1 3 1 2 3 4 5 6 X1 X2 X3 POWER SUPPLY AC18V 12VDC 15VDC 15VDC 48VDC PHANTOM CH1 MICROPHONE INPUT CH2 OUTPUT 2 1 3 4 PHASE PHASE PAD 20dB CH1 MICROPHONE INPUT U2 INA163 PAD 20dB VOLTAGE REGULATORUPPLY CH1 OUTPUT 6 TECHNICAL SPECIFICATIONS 6 1 Block Diagram 1 11 ...
Page 13: ...ignal To Noise 8 Digit LED Chassis Panel Weight Dimensions Power Transformer Performance Meter Physical Power Supply Type Input 5K Ohm 1M Ohm Neutrik Combo TM 100 Ohms 100 Ohms 0dB to 30dB 0dB to 40dB 90dB 0 5 98dB Dual Servo 24dBu to 18dBu 1 05Kg Steel Brushed Aluminum LTO Style R 18VAC Servo controlled stabilized 14 Watts External Wall Mount 199 W 153 D 45 H mm Input Output Panel Controls ...
Page 14: ...AND CONDITIONS 3 1 warrants that this product will be free from any defects in materials and or workman LTO ship for a period of 1 year from the purchase date if you have completed the Warranty Registration Card in time 3 3 During the warranty service may repair or replace this product at its own option LTO at no charge to you for parts or for labor in accordance with the right side of this limite...
Page 15: ...llow the exclusion or limitation of incidental or consequential damages so the above exclusion or limitation may not apply to you 3 6 This warranty gives you the specific rights and these rights are compatible with the state laws you may also have other statutory rights that may vary from state to state ...
Page 16: ...3737 email alto altoproaudio com Fax 886 4 22346757 c All rights reserved to ALTO All features and content might be changed without prior notice Any photocopy translation or reproduction of part of this manual without written permission is forbidden Copyright 2005 SEIKAKU GROUP SE KAKU TECHNICAL GROUP LIMITED I ...
