E90 OPERATORS MANUAL 2 MC AUDIO Ltd., Units 6-8, Kingsgate, Heathpark Industrial Estate, HONITON, Devon EX14 1YG England Tel: ++(0)1404.44633 Fax: ++(0)1404.44660 www.mc2-audio.co.
CONTENTS EC DECLARATION OF CONFORMITY 3 IMPORTANT SAFETY INSTRUCTIONS 4, 5, 6, 7 INSTALLATION 4 8 8 Electrical RF Emissions Mechanical GENERAL INFORMATION 9 CONNECTIONS Inputs Outputs 10 11 OPERATION Switching on Level controls Bar signal indicators -3dB indicator Limiters PRC indicators Temperature control Fault indicator CH Link LED 11 11 11 11 11 11 12 12 12 MAINTENANCE 12 TECHNICAL SPECIFICATION 13 APPENDIX 14 Table of PRC settings and resulting output 2
Important Safety Instructions 1) Read and keep these instructions. 2) Heed all warnings. 4) Follow all instructions. 5) Do not block any ventilation openings, install in accordance with the manufacturer’s instructions. 6) Unplug this apparatus during lightning storms or when unused for long periods of time. 7) Clean only with a dry cloth.
WARNING To reduce the risk of fire or electric shock, do not expose this apparatus to rain or moisture. WARNING To prevent injury, this apparatus must be securely attached to the rack in accordance with the installation instructions WARNING Apparatus with CLASS I construction shall be connected to a MAINS socket outlet with a protective earthing connection TO AVOID ELECTRICAL SHOCK DO NOT REMOVE COVERS. REFER ALL SERVICING TO QUALIFIED PERSONNEL.
WARNING: Apparatus with CLASS I construction shall be connected to a MAINS socket outlet with a protective earthing connection. WARNING: To prevent injury, this apparatus must be securely attached to the rack in accordance with the installation instructions. 1. Read these instructions. 2. Keep these instructions. 3. Heed all warnings. 4. Follow all instructions. 5. Do not use this apparatus near water. 6. Clean only with a dry cloth. 7.
ATTENTION: Appareils de construction de CLASSE I doit être raccordé au réseau électrique via une prise de courant reliée à la terre. ATTENTION: Pour éviter toute blessure, cet appareil doit être solidement fixé à la torture, conformément aux instructions d'installation. 1. Lisez ces instructions. 2. Gardez ces instructions. 3. Faites attention à tous les avertissements. 4. Suivez toutes les instructions. 5. N'utilisez pas cet appareil près de l'eau. 6.
INSTALLATION EMC (RF Emissions) The high frequency resonant converters in the E Series amplifiers have been designed to have very low radio frequency (RF) emissions, which can cause interference with other equipment. In order for this to be optimised, the amplifier should be mounted in a metal rack enclosure, which should have a separate (technical) Earth. Alternatively a separate earth should be attached to the amplifier at the rear rack mounting bracket.
General Information Your E90 power amplifier utilises a proprietary designed switching output (Class-D), which couples the advantages of extremely high power output levels with very high efficiency and yet maintains a high sonic performance consistent with MC2 Audio philosophy. Sophisticated internal controls and protection circuits maintain the amplifier at optimum performance level regardless of situation.
Connections INPUTS Note: This amplifier is wired to the latest industry recommendations. PIN1 is connected directly to the chassis/mains earth. If ground loops (mains hum) are encountered remove the screen connection from the other end of the cable and leave it open circuit. If problems persist, consult your dealer/supplier, DO NOT TAMPER WITH OR ALTER ANY GROUND (EARTH) CONNECTIONS INSIDE THE AMPLIFIER.
OUTPUTS Channel A and Channel B speaker outputs are via Neutrik Speakon connectors. 4 poles are used. 2-pole (NL2FC) or 4-pole (NL4FC) connectors can be used. Terminations are as follows :- Pin Pin +1, +2 = +ve -1, -2 = -ve NOTE: 1. Negative (-ve) output terminals from Channel A & B must not be joined together, since they are not both at 0V.
Temperature Control The cooling fans respond to temperature sensors within the unit to maintain a safe operating temperature. In the event of excessive temperature, the protection circuit will operate, disabling the output. The red ‘AUDIO-PROTECT’ (A/P) LED will indicate this condition. (See fault indicator.) There are 2 fans connected permanently with variable speed. Normal dynamic signals will not cause the amplifier to overheat unless the ventilation is inadequate.
AIR FILTER The filter behind the air intake apertures on the front of E SERIES amplifiers should be cleaned or replaced periodically, e.g. 3-6 months. (Filters in amplifiers located in more 'dirty' atmospheres may require more frequent maintenance). Access is via the blue front panel retained by 2.5mm Hex screws. The filter should be 'dry' cleaned, using a vacuum cleaner preferably. Running the unit without a filter is not recommended unless it is within a 'clean room'.
Power requirements The E90 can be supplied for nominal mains voltage of 115V or 230V. An internal link can be set to either 100V or 120V for the 115V version and 220V or 240V for the 230V version. Normally these are set to 120V and 240V respectively. This amplifier will only operate to its very high specification if it is installed and operated as described in this manual.
