E4E4-75 OWNER’S 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, 6, 7 INSTALLATION 4 5 5 Electrical RF Emissions Mechanical GENERAL INFORMATION 8 CONNECTIONS Inputs Outputs Bridged Operation 8 9 9 OPERATION Switching on Level controls Limiters Signal level indicators PRC indicators Temperature control Fault indicator 11 11 11 11 11 11 12 MAINTENANCE 12 TECHNICAL SPECIFICATION 13 NOTE THAT ALL AMPLIFIERS* BEFORE SERIAL NUMBER 7E70004 HAVE A DIFFERENT WIRING CONFIGURATION FOR THE I
IMPORTANT SAFETY INSTRUCTIONS 1) Read these instructions. 2) Keep these instructions. 3) Heed all warnings. 4) Follow all instructions. 5) Do not block any ventilation openings and 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.
DO NOT USE THE UNIT IF THE ELECTRICAL POWER CORD IS FRAYED OR BROKEN. The power supply cords should be routed so that they are not likely to be walked on or pinched by items placed upon or against them, paying particular attention to cords and plugs and the point where they exit from the appliance. ALWAYS OPERATE THE UNIT WITH THE AC GROUND WIRE CONNECTED TO THE ELECTRICAL SYSTEM GROUND. Precautions should be taken so that the means of grounding of a piece of equipment is not defeated.
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.
GENERAL INFORMATION Your E4-75 power amplifier utilises proprietary designed load impedance sensing output circuitry, which enables the amplifier to drive the high voltage swings associated with speaker impedances of 8 ohms and above, but automatically switches to a high current/medium voltage output required by 4 ohm loads. Fan speed is varied as required to keep the amplifier within its temperature limits. Signal limiters are included to protect speakers from clipped signals.
The amplifier is designed to operate with fully balanced equipment and ground loops or loss of performance may be experienced if connected to unbalanced sources. If it is unavoidable however, the following wiring should be used. The cable should still be twin core plus screen. Pin 1 - Screen - connected to the chassis of the unbalanced equipment - or left disconnected at the unbalanced end. Pin 2 - +ve signal Pin 3 - -ve signal Note: This amplifier is wired to the latest industry recommendations.
Channels C & D +ve = channel D +ve (pin +1 on connector D or +2 on connector C) -ve = channel C –ve (pin -1 on connector C) Note: Both level controls must be set to the same position. When operating in bridged mode, the minimum impedances are 8 ohms. Note: 1. Negative (-ve) output terminals must not be joined together, since they are not both at 0V. 2.
Operation SWITCHING ON At ‘switch-on’ the protection circuit will initially activate whilst the circuits stabilise. Assuming no faults are detected after a few seconds, the red A/P LED will go off. PANEL CONTROLS AND INDICATORS Level controls These are analogue controls allowing precise level settings. Note that in ‘BRIDGED’ mode, both level controls must be set to the same position.
Fault Indicator (Audio Protection – red LED) If the outputs are shorted or if DC is present, the protection circuit will disengage the outputs and the A/P LED will illuminate. The amplifier will continue to be monitored and depending on the type of fault, will either reset after the fault has cleared or require manual resetting by switching off at the mains switch and then on again after a few seconds. (See also temperature control above.
TECHNICAL SPECIFICATION Main Specifications - E series Amplifiers Parameter (Units) E90 E45 E25 E15 E100 E475 8 ohms 2500 1250 700 450 1400 775 4 ohms 4800 2500 1350 850 2800 900 2 ohms 8200 4200 2400 1550 3700 NA Output Power (per channel) (Watts) Output Power (bridged) ( Watts) 8 ohms 9600 5000 2700 1700 5300 1800 4 ohms 16400 8400 4800 3100 7400 NA @1kHz (@1dB below max output power) < 0.15 0.015 0.008 0.008 0.08 0.
