Coda Audio C45 Power Amplifier User Guide version 1.
Contents EC Declaration of Conformity Important Safety Instructions Installation Instructions Electrical Mechanical EMC (RF Emissions) General Information 3 4 4 4 5 5 5 -3 dB Indicators Power Reduction Circuit (PRC) 6 6 Level controls Signal indicators -3 dB indicator Limiters PRC indicators Temperature control Fault indicator Bridged LED 8 8 8 8 8 8 8 8 Notes on Dynamic Amplifiers Connections Inputs Outputs Bridged Operation Link Socket Operation Switching on Panel Controls and Indicators Maintenanc
C45 User Guide Version 1.
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, 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. To avoid electrical shock do not remove covers. Refer all servicing to qualified personnel. Do not use this 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.
The C-Series introduces three user-controlled features previously not seen on Coda Audio amplifiers: -3 dB indicators Power reduction control (PRC) User-settable gain/sensitivity (internal) The latest version now also has improved signal level indication with 3 green LEDs in a ‘bar chart’ format. This gives a much clearer indication of level to the operator. The -3 dB and Limit LEDs continue the bar format.
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. PIN1 - Screen - connected to the chassis of the unbalanced equipment - or left disconnected at the unbalanced end. PIN2 - Signal Hot PIN3 - Signal Cold Note: This amplifier is wired to the latest industry recommendations.
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, only the ‘POWER’ LED (and ‘SIGNAL’ indicators if signal is applied) will illuminate. Panel controls and indicators Level controls These are analogue controls allowing precise level settings. Note that in ‘BRIDGED’ mode only ‘channel A’ control is active.
Maintenance Caution: These servicing instructions are for use by qualified personnel only. Ensure that Electrical power to the unit is disconnected before carrying out any maintenance. Gain/Sensitivity settings Gain settings are changed internally by simple jumper links. Two rows of pins marked - GAIN A and GAIN B - are situated on the input PCB (PCB701). A jumper link sets the gain and the settings are as follows: Link 1 & 2 Link 3 & 4 Link 2 & 3 Note: gives gives gives 32 dB gain 26 dB gain approx.
Technical Specification Output power (Watts RMS) per channel 8 Ohm @ 1 kHz 4 Ohm @ 1 kHz 2 Ohm @ 1 kHz 1200 2250 3200 Mono Bridged 8 Ohm @ 1 kHz 4 Ohm @ 1 kHz 4400 6400 THD @ rated power 4 Ohm 1 kHz 20 Hz-20 kHz <0.009 % <0.03 % Input CMRR >90 dB Hum & Noise -105 dB Gain (selectable) +32 dB/+26 dB/+35.7 dB Sensitivity for rated output, 4 Ohm +9.75 dBu/+15.75 dBu/+6 dBu (1.5 V) Damping Factor 1 kHz, 8 ohms >400 Frequency response 20 Hz-20 kHz - +0/-0.
Appendix Table of PRC settings and resulting Output Output Per Channel (Watts) Bridged Mode (Watts) Max Power into 4 Ohm -2 dBu PRC Setting -4 dBu PRC Setting -6 dBu PRC Setting 2250 1400 900 560 6400 4000 2500 1600 Max Power into 8 Ohm -2 dBu PRC Setting -4 dBu PRC Setting -6 dBu PRC Setting 1200 800 525 350 4400 2800 1800 1200 Max Power into 2 Ohm -2 dBu PRC Setting -4 dBu PRC Setting -6 dBu PRC Setting 3200 2000 1250 800 N/A N/A N/A N/A C45 User Guide Version 1.
Coda Audio GmbH Boulvard der EU 6 30539 Hannover Germany Phone: +49 (0) 511 – 866 55 888 Fax: +49 (0) 511 – 866 55 887 E-Mail: contact@codaaudio.com Website: www.codaaudio.
