User's Manual
LTO
R
www.altoproaudio.com
Version 1.0 AUGUST 2005
English
MC250.4
FOUR CHANNELS POWER AMPLIFIER
Page 1: ...User s Manual LTO R www altoproaudio com Version 1 0 AUGUST 2005 English MC250 4 FOUR CHANNELS POWER AMPLIFIER ...
Page 2: ...t away from naked flames Read these instructions Follow all instructions Keep these instructions Do not discard Heed all warnings Only use attachments accessories specified by the manufacturer Do not tamper with the power cord or plug These are designed for your safety Do not remove Ground connections If the plug does not fit your AC outlet seek advice from a qualified electrician Protect the powe...
Page 3: ...nters in Italy Netherlands United Kingdom and Taiwan The core of our digital audio products is a sophisticated Software Team for many years Following this idea we create our products and we will create the new ones From our side we guarantee you and we will guarantee you also in future the best quality the best fruits of our continuous researches and the best prices Nothing else to add but that we...
Page 4: ... OF CONTENTS WARRANTY 13 9 TECHNICAL SPECIFICATIONS 12 8 BLOCK DIAGRAM 11 7 CAUTION FOR APPLICATION 10 6 5 APPLICATION 8 4 4 INSTALLATION INSTALLATION 7 3 CONTROL ELEMENTS 5 2 FEATURES 4 1 INTRODUC ION T 4 3 ...
Page 5: ... total reliability and a trouble free use even in the most demanding conditions We believe the MC250 4 not only look great but provide a perfect performance what you get is unprecedented performance at an incredibly attractive price 2 FEATURE Innovative design and high stability power amplifier Fan cooled AB class high power amplifier in 19 2U size 4 independent channels with separate protection s...
Page 6: ...ge is corrected the protection systems deactivate automatically this indicator goes out and normal amplifier operation is resumed Output Limiter LED Set the clip limit switch at ON position the yellow LED lights up when the unit is limiting the output signal Level Control This pot provides smooth level changes control Fan The unit is equipped with two fans which can accelerate the flow of air to l...
Page 7: ...el mode Mode Selector You can choose the right function and output you need via the mode selector switch In order to make you acquire these settings now let me introduce the dip switch This switch is made up of 10 small dip switches these small dip switches from1 to 5 control one channel these rest ones 6 10 control the other channel ok you can choose the right mode setting you need via these smal...
Page 8: ...ned in this manual unless you are qualified to do so Please turn off this unit before any installation and connection esp when you connect your unit into the sound system This is important to prevent damage to the unit itself as well as other consequent speaker system This is important to prevent damage to the unit itself as well as other consequent speaker system The mains connection of the MC 25...
Page 9: ...tional stereo amp The channel 1 input signal will be output from the channel 1 output jacks and the channel 2 input signal will be output form the channel 2 output jacks take channel 1 and channel 2 for example Apparaten skall anslutas till jordat uttag nar den ansluts till ett natverk BREAKER BREAKER CH1 CH2 CH3 CH4 INPUTS CH1 MODE SWITCHES CH2 CH3 MODE SWITCHES CH4 OUTPUTS BRIDGE MONO AC INPUT M...
Page 10: ... 5 6 7 8 910 SWITCH SETTINGS TO BRIDGE CHANNEL PAIRS SET INPUT SWITCHES AS SHOWN USE THE LOWER NUMBERED CHANNEL S INPUT AND GAIN CONTROL CONNECT SPEAKER AS SHOWN CH1 AND CH2 CH3 AND CH4 BRIDGEABLE CHANNEL PAIRS BRIDGE MONO CH3 CH1 CH4 CH2 BRIDGE MONO OUTPUTS SERIAL MODEL 1 2 3 4 5 6 7 8 910 PARALLEL MODE 1 2 3 4 5 6 7 8 9 10 1 2 3 4 5 6 7 8 9 10 Use only with a 250V fuse FILTERS 35Hz FILTER FILTER...
Page 11: ...ure to use a speaker system that has sufficient input capacity If the input capacity of your speaker system is lower than the rated output of the MC250 4 power amplifier you can protect your speakers by connecting a fuse serially between the speaker and the amplifier as shown below 10 Apparaten skall anslutas till jordat uttag nar den ansluts till ett natverk BREAKER BREAKER CH1 CH2 CH3 CH4 INPUTS...
Page 12: ...11 7 BLOCK DIAGRAM ...
Page 13: ... 22dB 10Kohms unbalanced 20 Kohms balanced Front AC Switch Ch1 Ch4 Gain Knobs Rear MODE SWITCHS Power On Blue LED Protection Green LED LIMITER Yellow LED Clip Red LED Parallel input Yellow LED Bridge Yellow LED Level Green LED 20 and 10dB Connectors each channel Input Terminal Block Output Screw terminal Barrier Block Power supply cooling Load protection Dimensions Net weight Continuously variable...
Page 14: ...TO 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 at no charge to you for LTO parts or for labor in accordance with the right side of this limited warranty 3 4 This warranty does not apply to the damages to this product that occurred as the following conditions Normal...
Page 15: ... 22313737 email alto altoproaudio com Fax 886 4 22346757 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 SEIKAKU TECHNICAL GROUP LIMITED NF02244 1 0 c ...
