Coda Audio C25 - Manual (Page 8)

8 C25 User Guide Version 1.0
Bridged (Mono) Operation
Use centre Speakon connector marked ‘BRIDGED’ and connect as follows:
For bridged operation:
Pin 1- = -ve (Ch A)
Pin 2+ = +ve (Ch B)
For 4-pole connection to both channels: Pin 1+ = Ch. A +ve
(Bridged switch de-selected [ie Out]) Pin 1- = Ch. A -ve
Pin 2+ = Ch. B +ve
Pin 2- = Ch. B -ve
When operating in bridged mode, the minimum impedances are doubled. The minimum load in
bridged mode is: 4 Ohm.
Link Socket
Each channel is provided with a 3-pin XLR connector marked ‘LINK’ which allows the input signal to
be linked to further amplifiers etc. The connections are the same as for the input XLR.
Operation
Switching on
At ‘switch-on’ the protection circuit will initially activate whilst the circuits stabilize. 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.
Signal Indicators (3 Green LEDs)
These are active from a minimum output level of approximately 10 Watts and are only an indication of
signal level.
-3dB Indicators (yellow LED)
These are active when the signal is 3dB below the limiting level.
Limiters (Red LED)
The C25 incorporates signal limiters, which are preset to prevent clipping with high levels of drive.
The amber LEDs on the front panel illuminate to indicate operation of the limiters.
PRC Indicators (green LED)
These indicate when the PRC circuit for that specific channel has been selected with the rear panel
switches.
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.)
The C25 has four fans connected permanently with variable speed and a jumper link to enable them
from cold.