Coda AMPLIFIER 15.0 User manual

AMPLIFIER 15.0
OPERATION MANUAL
TECHNOLOGIES INC.
9
4
1
2
3
13
15
14
12
SAFETY PRECAUTIONS
INITIAL SETUP
INTRODUCTION
DETAILED INSTALLATION
DESIGN PHILOSOPHY
TECHNICAL DATA
CARE AND HANDLING
WARRANTY & DISCLAIMER
WARRANTY REGISTRATION
BIAS INPUT
PRECISION CLASS A AMPLIFIER
15.0 CODA TECHNOLOGIES INC.
LEFT RIGHTXLR/GN
RCA/YL

!
CAUTION
CAUTION
WARNING
WARNING !
SERVICING TO QUALIFIED SERVICE
CAUTION: TO PREVENT ELECTRIC SHOCK,
DO NOT REMOVE COVER. NO USER
SERVICEABLE PARTS INSIDE, REFER
PERSONNEL.
THIS SYMBOL IS INTENDED TO ALERT
YOU OF THE PRESENCE OF IMPORTANT
OPERATING AND MAINTENANCE
INSTRUCTIONS IN THE LITERATURE
ACCOMPANYING THE UNIT.
THIS SYMBOL IS TO ALERT YOU OF THE
PRESENCE OF UNINSULATED DANGER-
OUS VOLTAGE WITHIN THE UNIT'S
ENCLOSURE THAT MAY BE OF SUFFI-
CIENT MAGNITUDE TO CONSTITUTE A
RISK OF ELECTRIC SHOCK.
WARNING: 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.
CAUTION -
-
-
-
-
SAFETY PRECAUTIONS 1

Thank you for purchasing the AMPLIFIER 15.0.
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
AMPLIFIER 15.0 we recommend that you read this entire manual
carefully.
INTRODUCTION 2

Stereo Amplifier Configuration
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.
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.
The diagram below shows the default connections necessary to operate the AMPLIFIER 15.0
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.
INITIAL SETUP 3
LEFT SPEAKER RIGHT SPEAKER
PREAMPLIFIER
AMPLIFIER 15.0
!
FOR CONTINUED PROTECTION AGAINST
SHOCK OR FIRE HAZARD,DO NOT EXPOSE
THIS UNIT TO RAIN OR MOISTURE.
AC LINE INPUT
SEE SERIAL T AG FOR
POWER REQUIREMENTS
~
UNBALANCED INPUT
RIGHTLEFT
COMPACT DISC
RIGHTLEFT
TUNER
RIGHTLEFT
VIDEO
RIGHTLEFT
MONITOR
RIGHTLEFTRIGHTLEFT
IN OUT
PROCESSOR
RIGHTLEFTRIGHTLEFT
IN OUT
VIDEO
RIGHTLEFT
UNBALANCED OUTPUT
RIGHTLEFT
TECHNOLOGIES INC.
MODEL
SERIAL NUMBER
VOLTAGEREQUIREMENT
MANUFACTUREDIN THE USA
HZ
POWER REQUIREMENT VA
FOR CONTINUED PROTECTION
AGAINST SHOCK OR FIRE:
1. REPLACE FUSE WITH SAME
TYPE AND RATING
2. DO NOT EXPOSE THIS UNIT
TO RAIN OR MOISTURE
BRIDGED
STEREO
DO NOT ALLOW AMPLIFIER OUTPUTS
TO COMMON BETWEEN CHANNELS,
OR CONTACTCHASSIS OR INPUT
GROUNDS, ORTO BE CONNECTED
TO ANY ACTIVE CURRENT SOURCE.
MAIN POWER
OFF ON
AC LINE FUSE CHART FUSE AND VOLTAGESELECTOR
FUSE VALUE-SEE FUSE CHART
VOLTAGESELECTION-
SEE OPERATIONMANUAL
!
NOTE
SEE SERIAL TAGFOR POWER
REQUIREMENTS, REMOVE POWER
CORD BEFORE CHANGING
FUSE OR LINE VOLTAGE
!
12
0
AC LINE INPUT
~
TO PREVENT ELECTRIC SHOCK, DO NOT
REMOVE COVER. NO USER SERVICEABLE
PARTSINSIDE. REFER SERVICING TO
QUALIFIED SERVICEPERSONNEL.
CAUTION
CAUTION
W
WARNING ARNING
!
LEFT CHANNEL
UNBALANCED
INPUTS
BALANCED
RIGHT CHANNEL
INPUTS
UNBALANCED
BALANCED
MODE
PUSH
PUSH
VOLTAGE FUSE TYPE
100V
120V
220V
240V
12 AMP SLOW BLOW 5 x 20mm
6AMP SLOW BLOW 5 x 20mm
DO NOT CONNECT AMPLIFIER OUTPUT
TERMINALS TOGETHER. CONNECT
AMPLIFIER OUTPUT TERMINALS ONLYTO
SPEAKERS.
FOR CONTINUED PROTECTION AGAINST
SHOCK OR FIRE:
REPLACE FUSE WITH SAME TYPE AND
RATING. DO NOT EXPOSE THIS UNIT TO
RAIN OR MOISTURE
SEE SERIAL TAGFOR POWER REQUIREMENTS.
REMOVE POWER CORD BEFORE CHANGING FUSE OR LINE VOLTAGE.
AC LINE INPUT MAINPOWER FUSE / VOLTAGESELECTOR
READ THE BRIDGING SECTION OF THE OPERATINGMANUAL OR CONTACT YOUR CODA AUTHORIZED
DEALER TO SET THE BRIDGING SWITCHES
BRIDGED MODE
16 AMP
16 AMP
8 AMP
8 AMP
UNBALANCED
BRIDGED
INPUTS
INPUTS
BALANCED
BALANCED
INPUTS
UNBALANCED
PUSH PUSH
230

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.
3. The AC line input should be connected to an AC outlet with the power cable
provided with the amplifier.
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.
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.
DETAILED INSTALLATION 4
3. The MAIN POWER switch, once all appropriate connections are made, may be left on
as the AMPLIFIER S5.5 draws a negligible amount of current when the BIAS is turned off.
4.The FUSE AND VOLTAGE SELECTOR houses a 5 X 20 slow blow fuse and voltage selector
cartridge. Should the fuse blow, contact a Coda dealer or call Coda directly. When
changing the fuse, or altering the voltage selection be sure this unit is disconnected from
it's AC power source.
5.The AC LINE INPUT should be attached to the power cable provided with the amplifier.
After making the appropriate connections insert the three prong safety plug into an
appropriate AC power source. Once the AMPLIFIER S5 is properly connected, the
power switch may be turned on and the LED on the front panel will light indicating a ready
state.
22
3
4
5
1
DO NOT CONNECT AMPLIFIER OUTPUT
TERMINALS TOGETHER. CONNECT
AMPLIFIER OUTPUT TERMINALS ONLY TO
SPEAKERS.
FOR CONTINUED PROTECTION AGAINST
SHOCK OR FIRE:
REPLACE FUSE WITH SAME TYPE AND
RATING. DO NOT EXPOSE THIS UNIT TO
RAIN OR MOISTURE
SEE SERIAL TAG FOR POWER REQUIREMENTS.
REMOVE POWER CORD BEFORE CHANGING FUSE OR LINE VOLTAGE.
AC LINE INPUT MAIN POWER FUSE / VOLTAGE SELECTOR
READ THE BRIDGING SECTION OF THE OPERATING MANUAL OR CONTACT YOUR CODA AUTHORIZED
DEALER TO SET THE BRIDGING SWITCHES
BRIDGED MODE
16 AMP
16 AMP
8 AMP
8 AMP
UNBALANCED
BRIDGED
INPUT
INPUTS
BALANCED
BALANCED
INPUTS
UNBALANCED
PUSH PUSH
230
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.
NOTE: If the fuse in your amplifier blows, contact a Coda dealer or call Coda
directly before attempting to use the amplifier again.

II. Front Panel Control Functions and Indicators
1 243 3
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.
3. These LEDs, when lit, indicate that the bias is enabled and muting is off.
2. The input selector button switches between the balanced and unbalanced inputs.
1. The bias button enables the bias, effectively "turning on" the amplifier's
components, and opens shunting relays that mute the input.
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.
DETAILED INSTALLATION 5
PRECISION BIAS CLASS A AMPLIFIER
S
5.5
BIAS INPUT LEFT RIGHT
XLR/GN
RCA/YL
BIAS INPUT
LEFT RIGHT
XLR/GN
RCA/YL
PRECISION BIAS AB AMPLIFIER
33.0 CODA TECHNOLOGIES INC.
BIAS INPUT
PRECISION CLASS A AMPLIFIER
15.0 CODA TECHNOLOGIES INC.
LEFT RIGHTXLR/GN
RCA/YL

III. BRIDGED SETUP
WARNING:
The 15.0 normally operates in stereo mode, providing a maximum output power of
150 watts Class AB (into an 8-ohm load) per channel. In bridged mode, both
channels act as one amplifier providing a maximum output power of 600 watts. For
extremely high-power multi-channel audio applications, multiple 15.0 amplifiers can
be used in place of one stereo amplifier.
To configure the amplifier for bridged mode operation you must enable the bridging
switches inside the amplifier. Use a 5/64” hex driver to remove the twelve screws from
the top of the amplifier and remove the top cover. The bridging switches are
mounted on a circuit board attached to the audio input jacks inside the amplifier.
The diagram below shows the circuit board. The red slide switches below the arrows
are the bridging switches. The arrows show the direction to set the switches to enable
bridging. Reverse the switch positions to enable normal stereo operation.
In bridged mode only one audio input is used. No other input should be connected,
and the bridged mode input must be a balanced signal connected to the XLR
receptacle labeled BRIDGED INPUT. Bridged mode will not operate correctly with an
input adapted from an unbalanced signal. Connecting the input signal to the
receptacle not labeled BRIDGED INPUT will cause no damage, but will cause the
speaker terminal polarities to reverse, with the terminal labeled positive becoming
ground and the terminal labeled ground becoming positive.
The amplifier’s speaker terminals are reconfigured in bridged mode. The left channel
positive terminal becomes the monaural negative terminal and the right channel
positive terminal becomes the monaural positive terminal.
See the next page for a diagram of a stereo amplifier configuration using two
bridged mode 15.0 amplifiers. Speaker terminals in the diagram are marked with
their bridged mode polarities.
Disconnect the amplifier's power cord from the AC supply and set the power switch
to OFF before adjusting the mode switch or connecting or disconnecting any
cables to avoid potential damage to your speakers and personal injury due to high
internal voltages.
DETAILED INSTALLATION 6
BRIDGED
STEREO
MODEL
SERIAL NUMBER
MODE
Back of AMPLIFIER S5

IV. BRIDGED SETUP DIAGRAM
DETAILED INSTALLATION 7
TECHNOLOGIES INC.
MODEL SERIAL NUMBER
VOLTAGEREQUIREMENT
MANUFACTUREDIN THE USA
HZ
POWER REQUIREMENT VA
FOR CONTINUED PROTECTION AGAINST SHOCK OR FIRE: 1. REPLACE FUSE WITH SAME TYPE AND RATING 2. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE
BRIDGED
STEREO
DO NOT ALLOW AMPLIFIER OUTPUTS TO COMMON BETWEEN CHANNELS, OR CONTACTCHASSIS OR INPUT GROUNDS, ORTO BE CONNECTED TO ANY ACTIVE CURRENT SOURCE.
MAIN POWER
OFF ON
AC LINE FUSE CHART FUSE AND VOLTAGESELECTOR
FUSE VALUE-SEE FUSE CHART VOLTAGESELECTION-
SEE OPERATIONMANUAL
!
NOTE
SEE SERIAL TAGFOR POWER REQUIREMENTS, REMOVE POWER CORD BEFORE CHANGING FUSE OR LINE VOLTAGE
!
12 0
AC LINE INPUT
~
TO PREVENT ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER SERVICEABLE PARTSINSIDE. REFER SERVICING TO
QUALIFIED SERVICEPERSONNEL.
CAUTION
CAUTION
W
WARNING
ARNING
!
LEFT CHANNEL
UNBALANCED
INPUTS
BALANCED
RIGHT CHANNEL
INPUTS
UNBALANCED
BALANCED
MODE
PUSH
PUSH
VOLTAGE FUSE TYPE
100V 120V 220V 240V
12 AMP SLOW BLOW 5 x 20mm
6AMP SLOW BLOW 5 x 20mm
Bridged
Output
Bridged
Output
TECHNOLOGIES INC.
MODEL SERIAL NUMBER
VOLTAGEREQUIREMENT
MANUFACTUREDIN THE USA
HZ
POWER REQUIREMENT VA
FOR CONTINUED PROTECTION AGAINST SHOCK OR FIRE: 1. REPLACE FUSE WITH SAME TYPE AND RATING 2. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE
BRIDGED
STEREO
DO NOT ALLOW AMPLIFIER OUTPUTS TO COMMON BETWEEN CHANNELS, OR CONTACTCHASSIS OR INPUT GROUNDS, ORTO BE CONNECTED TO ANY ACTIVE CURRENT SOURCE.
MAIN POWER
OFF ON
AC LINE FUSE CHART FUSE AND VOLTAGESELECTOR
FUSE VALUE-SEE FUSE CHART VOLTAGESELECTION-
SEE OPERATIONMANUAL
!
NOTE
SEE SERIAL TAGFOR POWER REQUIREMENTS, REMOVE POWER CORD BEFORE CHANGING FUSE OR LINE VOLTAGE
!
12 0
AC LINE INPUT
~
TO PREVENT ELECTRIC SHOCK, DO NOT REMOVE COVER. NO USER SERVICEABLE PARTSINSIDE. REFER SERVICING TO
QUALIFIED SERVICEPERSONNEL.
CAUTION
CAUTION
W
WARNING
ARNING
!
LEFT CHANNEL
UNBALANCED
INPUTS
BALANCED
RIGHT CHANNEL
INPUTS
UNBALANCED
BALANCED
MODE
PUSH
PUSH
VOLTAGE FUSE TYPE
100V 120V 220V 240V
12 AMP SLOW BLOW 5 x 20mm
6AMP SLOW BLOW 5 x 20mm
Bridged
Output
Bridged
Output
DO NOT CONNECT AMPLIFIER OUTPUT TERMINALS TOGETHER. CONNECT AMPLIFIER OUTPUT TERMINALS ONLYTO SPEAKERS.
FOR CONTINUED PROTECTION AGAINST SHOCK OR FIRE: REPLACE FUSE WITH SAME TYPE AND RATING. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE
SEE SERIAL TAGFOR POWER REQUIREMENTS.
REMOVE POWER CORD BEFORE CHANGING FUSE OR LINE VOLTAGE.
AC LINE INPUT MAINPOWER FUSE / VOLTAGESELECTOR
READ THE BRIDGING SECTION OF THE OPERATINGMANUAL OR CONTACT YOUR CODA AUTHORIZED
DEALER TO SET THE BRIDGING SWITCHES
BRIDGED MODE
16 AMP 16 AMP
8 AMP 8 AMP
UNBALANCED
BRIDGED
INPUT
INPUTS
BALANCED
BALANCED
INPUTS
UNBALANCED
PUSH PUSH
230
DO NOT CONNECT AMPLIFIER OUTPUT TERMINALS TOGETHER. CONNECT AMPLIFIER OUTPUT TERMINALS ONLYTO SPEAKERS.
FOR CONTINUED PROTECTION AGAINST SHOCK OR FIRE: REPLACE FUSE WITH SAME TYPE AND RATING. DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE
SEE SERIAL TAGFOR POWER REQUIREMENTS.
REMOVE POWER CORD BEFORE CHANGING FUSE OR LINE VOLTAGE.
AC LINE INPUT MAINPOWER FUSE / VOLTAGESELECTOR
READ THE BRIDGING SECTION OF THE OPERATINGMANUAL OR CONTACT YOUR CODA AUTHORIZED
DEALER TO SET THE BRIDGING SWITCHES
BRIDGED MODE
16 AMP 16 AMP
8 AMP 8 AMP
UNBALANCED
BRIDGED
INPUT
INPUTS
BALANCED
BALANCED
INPUTS
UNBALANCED
PUSH PUSH
230
RIGHT SPEAKER
LEFT SPEAKER
PREAMPLIFIER
!
FOR CONTINUED PROTECTION AGAINST SHOCK OR FIRE HAZARD,DO NOT EXPOSE THIS UNIT TO RAIN OR MOISTURE.
AC LINE INPUT SEE SERIAL T AG FOR POWER REQUIREMENTS
~
UNBALANCED INPUT
RIGHTLEFT
COMPACT DISC
RIGHTLEFT
TUNER
RIGHTLEFT
VIDEO
RIGHTLEFT
MONITOR
RIGHTLEFTRIGHTLEFT
IN OUT
PROCESSOR
RIGHTLEFTRIGHTLEFT
IN OUT
VIDEO
RIGHTLEFT
UNBALANCED OUTPUT
RIGHTLEFT

DETAILED INSTALLATION 8
III. REMOTE CONTROL (optional)
WARNING:
The 15.0 may be operated by an optional remote control. Coda provides a remote
manufactured by Universal Remote Control (model MX350) preprogrammed for use
with several Coda amplifiers. Before operating the remote, you should read the
manufacturer’s manual in detail in order to understand it’s general functionality and
how to integrate it into your existing audio-visual system.
To operate the 15.0 remotely, select “AMP” from the main menu, then either select
the “BIAS” or “INPUT” entries from the submenu, or use the buttons as indicated
below. These functions correspond to the buttons on the amplifier’s faceplate. For
reference, BIAS toggles the state of the bias circuitry (standby) on and off and INPUT
toggles between the balanced and unbalanced audio inputs.
The manufacturer’s manual for the universal remote control gives instructions for
clearing the remote’s settings and restoring it to a “factory” default condition. This
will make the remote INOPERABLE with your Coda amplifier. Restoring remote
functionality will require sending your remote back to the Coda factory for
reprogramming. If you are programming your remote for use with other devices and
are unsure if you are going to interfere with Coda programming, contact us at the
phone number or email address on the back of this manual.
OFF ON
MAIN
VOL CH
MUTE
GUIDE
PREV
CH
BIAS
INPUT
CSI
INPUT
TOGGLE
BIAS

I. Design Philosophy and Approach
The subtlety of the design process at this level of performance makes it impossible to
easily explain all of the advantages inherent in the 15.0. However, we present here an
overview to give you an understanding of some of its unique features and an idea of
the listening experience you can expect. Often a particular technique has
numerous unrelated advantages and possibilities. We make every effort to exploit these
advantages with the final result being an amplifier that performs better than the
sum of its individual features suggest.
The topology and component selection is built on the foundation established by
the Coda System 100. Balanced interconnections are provided to take advantage
of their greater noise rejection. Differential voltage gain throughout provides
exceptional rejection of external noise and contributes to the inherent DC stability of
the circuit. This allows direct coupling without servo circuitry. The unit also uses
output followers operating without feedback.
Excellent high frequency design insures linear operation at high speed, and
translates into a sonic reproduction which is extremely transparent in character. The
power supply takes a very direct approach to high performance. First, top quality
toroidal transformers and over 144,000uf of capacitance with very low ESR and
inductance are used. For optimum performance and reliability all circuitry remains
continuously powered.
The specifications are consistent with what would be expected in a high current
amplifier design. In this design , however , an unusual degree of attention has been
paid to sonically meaningful parameters.
For example, the current stage is capable of producing peak currents in excess of
100 Amperes with a degree of linearity and speed unmatched by other designs
producing only a fraction of of this current. This is achieved by the implementation of
several distinct circuit features.
Extremely wide bandwidth transistors are used in the output stage instead of the usual
TO3 devices used in other output designs. Each channel uses 30 individual output
transistors with a combined power rating of 1500 Watts and 120 Amperes with a
bandwidth of 50 Mhz.
The 15.0 uses bias voltages and component values which have been specifically
selected to produce a precision transition with no abrupt changes in distortion or
output impedance. This “Precision Bias” technique yields seemless performance
regardless of the complexity of the load impedance and is particularly effective at
eliminating IM distortion which often occurs in these instances.
DESIGN PHILOSOPHY 9

I. Design Philosophy and Approach (continued)
To maintain “Precision Bias” requires an advanced bias circuit that must have a very
high degree of stability under a wide range of temperatures and load conditions.
Most amplifier bias networks are of such high impedance and poor thermal regulation
that at the extremes of operation, bias currents are ineffectively controlled. Advanced
tracking techniques used in the 15.0 result in absolute control of bias currents under all
conditions.
The main power supply of the amplifier consists of two 2000VA toroidal power
transformers (or one 3000VA transformer in the EU) with independent rectifiers to
isolate the channels from one another. 184,000 microfarads of total capacitance
provide effective filtering of all AC ripple.
These attributes result in a amplifier of such extreme linearity and bandwidth that no
overall feedback correction is required or used. One advantage of this is a high
degree of immunity from interactions with loads or cables and a superior transient
response. An extremely low nonreactive output impedance is maintained well beyond
20,000 hz. The resulting uniform damping factor is not commonly found in other
designs.
The chassis of the 15.0 is constructed of machined aluminum milled to very close
tolerances yielding the seamless appearance characteristic of previous products
from Coda. As with all high-power amplifiers, heat dissipation is important. The 15.0
uses six massive aluminum heat sinks without fans for efficient, noiseless, and clean
thermal relief. The thermal coefficient of the 15.0 heat sinks is one of the lowest and
most effective in the audio industry.
DESIGN PHILOSOPHY 10

II. Material Quality
The amplifier’s chassis is made from machined aluminum. All exterior metal parts are
anodized or powder coated for durability.
Printed circuit boards are fiberglass epoxy with gold plating over a tin/nickel barrier.
The gold layer will not corrode, while the barrier layer prevents the gold from migrating
to the lower copper layer.
All resistors are precision metal film; 1% tolerance for 1/4-watt and 5% tolerance for
1-watt.
Capacitors have been eliminated wherever possible. No electrolytic capacitors are
used except in the power supply, where several high-capacitance electrolytics
provide outstanding filtering of the supply output.
All semiconductor devices are of very high grade. Voltage gain is accomplished with
an extremely high-quality, matched dual FET, chosen for it’s exceptionally low noise
characteristics.
All audio input and output connector contacts are gold-plated, and XLR receptacles
are manufactured by Neutrik of Switzerland. Wire is used as little as possible in the
signal path - only to connect the RCA jacks and speaker terminals to the circuit board
- and what is used is 141-strand silver-plated copper with silicone insulation.
DESIGN PHILOSOPHY 11

STEREO
Rated Power: 150 Watts class AB (100 Watts class A) @ 8 Ohms,
300 Watts class AB @ 4 Ohms
Frequency Response: DC to -3dB @ 100kHz
Distortion: < .02 percent from 10Hz to 20kHz @ rated power
Gain: 26dB
Maximum Current: >100 Amperes peak per channel
Noise: -120dB referenced to rated output
Input Impedance: 50k Ohms unbalanced/10k Ohms balanced
Output Impedance: .03 Ohms from 20Hz to 20kHz
BRIDGED MONO
Rated Power: 600 Watts class AB @ 8 Ohms,
1200 Watts class AB @ 4 Ohms
Frequency Response: DC to -3dB @ 100kHz
Distortion: < .02 percent from 10 Hz to 20kHz @ rated power
Gain: 32dB
Maximum Current: >100 Amperes peak
Noise: -120dB referenced to rated output
Input Impedance: N/A unbalanced/10k Ohms balanced
Output Impedance: .06 Ohms from 20Hz to 20kHz
Transformer Rating: 2 x 2 kVA (EU: 1 x 3 kVA)
Power Filtering: 184,000 µF
Transformer Type: Multi-tap, multi-winding toroidal
POWER SUPPLY
DIMENSIONS
Height:7" Faceplate, 7.75" Overall
Width: 17.5" Overall
Depth: 19" Overall
Weight: 110 lbs., 115 lbs., Shipping
Power requirement: 1K Watts maximum at rated power
TECHNICAL DATA 12

The interior of the amplifier requires no special care. If exterior cleaning beyond simple
dusting is required, any dilute ammonia-based product is recommended. Do not use
any abrasive rags, cleaners or chemical solvents on the amplifier.
When handling the amplifier, take care not to mar the faceplate. Aluminum is a
medium hardness metal and can be scratched by harder tool steels, and the grained
surface can be easily marred if the amplifier is set face-down on a hard surface. Do
not rest the amplifier on it’s faceplate.
The amplifier should not be left in direct sunlight or exposed to intense heat to avoid
damage to internal components or finish.
It is recommended that you do not throw away any shipping material. The box and
packing materials are ideal for moving, and if any service is required they will be
necessary for safe shipment.
CARE AND HANDLING 13

SACRAMENTO, CA 95826 USA
TECHNOLOGIES INC.
7850 CUCAMONGA AVENUE #31
phone [phone] fax [phone]
on the web at CODA.CC
email us at [email protected]