Coda Stereo Amplifier 40.0 User Manual
TECHNOLOGIES INC.
CODA TECHNOLOGIES INC.
RCA/YL
XLR/GN
LEFT RIGHT
BIAS INPUT
PR ECI SION BIAS AB AMPLI FIER
33.0
AMPLIFIER 33.0
OPERATION MANUAL
SAFETY PRECAUTIONS
INTRODUCTION
INITIAL SETUP
DETAILED INSTALLATION
DESIGN PHILOSOPHY
TECHNICAL DATA
CARE AND HANDLING
WARRANTY & DISCLAIMER
WARRANTY REGISTRATION
1
2
3
4
9
12
13
14
15
SAFETY PRECAUTIONS 1
CAUTION
CAUTION
WARNING
WARNING
CAUTION: TO PREVENT ELECTRIC SHOCK,
DO NOT REMOVE COVER. NO USER
SERVICEABLE PARTS INSIDE, REFER
SERVICING TO QUALIFIED SERVICE
PERSONNEL.
THIS SYMBOL IS TO ALERT YOU OF THE
PRESENCE OF UNINSULATED DANGEROUS VOLTAGE WITHIN THE UNIT'S
ENCLOSURE THAT MAY BE OF SUFFICIENT MAGNITUDE TO CONSTITUTE A
RISK OF ELECTRIC SHOCK.
!
WARNING:
CAUTION -
THIS SYMBOL IS INTENDED TO ALERT
YOU OF THE PRESENCE OF IMPORTANT
OPERATING AND MAINTENANCE
!
TO PREVENT FIRE OR SHOCK HAZARD, DO NOT
EXPOSE THIS UNIT TO RAIN OR MOISTURE. TO
AVOID ELECTRICAL SHOCK, DO NOT OPEN THE
UNIT. REFER SERVICING TO QUALIFIED PERSONNEL.
Never install or remove the power cord from the chassis
unless it has been disconnected from the AC power source
first.
Never pull on the power cord when removing it from an AC
-
power source. Grasp it by the plug.
Do not leave the power cord connected to an AC power
-
source unless it is connected to the unit.
-
It is recommended that during extended periods of nonuse
the unit's power cord be unplugged from its AC power
source.
Route the AC power cord so that it will not be damaged or
-
walked on.
INSTRUCTIONS IN THE LITERATURE
ACCOMPANYING THE UNIT.
INTRODUCTION 2
Thank you for purchasing the AMPLIFIER 33.0.
This amplifier is a precision device, designed in an effort to provide
the listener with unmatched sound quality through superb design
and construction.
Although its operation is fairly simple, in order to operate your
amplifier properly and to realize all of the capabilites of the 33.0 we
recommend that you read this entire manual carefully.
INITIAL SETUP 3
WARNING: Please ensure that the power switch is turned OFF while you are connecting the
amplifier. Connecting or disconnecting cables while the amplifier is powered on could
cause damage to your speakers.
The diagram below shows the default connections necessary to operate the 33.0 as a
stereo amplifier. This is the simplest and most common mode of operation, and the quickest
way to get started. Once these connections are made you can turn the power switch on,
enable the bias from the front panel and start listening to your amplifier.
For simplicity this diagram shows an audio configuration using balanced interconnects. This
is the default input mode of the amplifier. Unbalanced operation requires that you set the
appropriate input mode as detailed on page 5.
NOTE: Ensure that the mode switch located between the input jacks on the rear of the
amplifier is set to the stereo position for normal operation. Bridged operation is explained on
page 7.
Stereo Amplifier Configuration
FOR CONTINUED PROTECTION AGAINST
AC LINE INPUT
~
SEE SERIAL TAG FOR
!
POWER REQUIREMENTS
SHOCK OR FIRE HAZARD,DO NOT EXPOSE
THIS UNIT TO RAIN OR MOISTURE.
UNBALANCED OUTPUT
RIGHTLEFT
PREAMPLIFIER
VIDEO
IN
RIGHTLEFT
FOR CONTINUED PROTECTION AGAINST
SHOCK OR FIRE:
REPLACE FUSE WITH SAME TYPE AND
RATING. DO NOT EXPOSE THIS UNIT TO
RAIN OR MOISTURE
PROCESSOR
READ THE BRIDGING SECTION OF THE OPERATING MANUAL OR CONTACT YOUR CODA AUTHORIZED
UNBALANCED
BALANCED
OUT
RIGHTLEFTRIGHTLEFT
INPUTS
PUSH PUSH
DEALER TO SET THE BRIDGING SWITCHES
BRIDGED MODE
MONITOR
IN
INPUTS
UNBALANCED
BRIDGED
INPUTS
BALANCED
OUT
RIGHTLEFTRIGHTLEFT
VIDEO
DO NOT CONNECT AMPLIFIER OUTPUT
TERMINALS TOGETHER. CONNECT
AMPLIFIER OUTPUT TERMINALS ONLY TO
SPEAKERS.
TUNER
RIGHTLEFT
RIGHTLEFT
RIGHTLEFT
RIGHTLEFT
UNBALANCED INPUT
COMPACT DISC
16 AMP
16 AMP
8 AMP
8 AMP
AC LINE INPUT MAIN POWER FUSE / VOLTAGE SELECTOR
REMOVE POWER CORD BEFORE CHANGING FUSE OR LINE VOLTAGE.
LEFT SPEAKER RIGHT SPEAKER
AMPLIFIER 33
230
SEE SERIAL TAG FOR POWER REQUIREMENTS.
DETAILED INSTALLATION 4
I. Connections
The connectors and controls are clearly marked on the back panel of the amplifier.
Note the correct left or right channel orientation. The function and channel markings on
the rear panel correspond to the front panel controls and their signal paths.
1. The unbalanced and balanced inputs should be attached to the
appropriate unbalanced and balanced outputs of a preamplfier either directly
or through a crossover or processor, as appropriate to the application.
2. The left output and right output should be attached to the left and right speakers
respectively.
WARNING: There are no fuses on the amplifier’s outputs in order to cut down on
output impedance effects. Speaker protection is left to the manufacturer of your
speakers, as they would best know how to protect their product.
3. The AC line input should be connected to an AC outlet with the power cable
provided with the amplifier.
4. The fuse and voltage selector unit houses a 5x20mm slow-blow fuse and a voltage
selector cartridge. Ensure that the voltage, visible through a small window next to the
AC input, is set to the appropriate voltage for your country. When changing voltages,
ensure that the power cable is disconnected from the amplifier.
NOTE: If the fuse in your amplifier blows, contact a Coda dealer or call Coda
directly before attempting to use the amplifier again.
5. The power switch can usually be left on when the amplifier is functioning correctly.
With the bias disabled the amplifier will draw negligible current and can thus be left in
“standby” indefinitely.
2
FOR CONTINUED PROTECTION AGAINST
SHOCK OR FIRE:
REPLACE FUSE WITH SAME TYPE AND
RATING. DO NOT EXPOSE THIS UNIT TO
RAIN OR MOISTURE
UNBALANCED
BALANCED
READ THE BRIDGING SECTION OF THE OPERATING MANUAL OR CONTACT YOUR CODA AUTHORIZED
1
INPUTS
BRIDGED
INPUT
PUSH PUSH
BRIDGED MODE
DEALER TO SET THE BRIDGING SWITCHES
2
INPUTS
UNBALANCED
BALANCED
DO NOT CONNECT AMPLIFIER OUTPUT
TERMINALS TOGETHER. CONNECT
AMPLIFIER OUTPUT TERMINALS ONLY TO
SPEAKERS.
16 AMP
16 AMP
8 AMP
8 AMP
AC LINE INPUT MAIN POWER FUSE / VOLTAGE SELECTOR
SEE SERIAL TAG FOR POWER REQUIREMENTS.
REMOVE POWER CORD BEFORE CHANGING FUSE OR LINE VOLTAGE.
5
3
230
4
DETAILED INSTALLATION 5
II. Front Panel Control Functions and Indicators
1. The bias button enables the bias, effectively "turning on" the amplifier's
components, and opens shunting relays that mute the input.
2. The input selector button switches between the balanced and unbalanced inputs.
3. These LEDs, when lit, indicate that the bias is enabled and muting is off.
4. This two color LED indicates that the main power is on. When it is red the
balanced inputs are in use. When it is yellow the unbalanced inputs are in use.
RCA/YL
LEFT RIGHT
XLR/GN
BIAS INPUT
PR ECI SION BIAS AB AMPLI FIER
CODA TECHNOLOGIES INC.
33.0
1 243 3
Note: If a power interruption occurs to the system the amplifier will power on with the
bias off. Press the bias button to resume use of the amplifier.
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