Coda 60.0 Installation manual

- BANK
OPERATION MANUAL
AMPLIFIER 60.0
MONO BALANCED AMPLIFIER
60.0 CODA TECHNOLOGIES INC.
+ BANK
1
2
3
10
SAFETY PRECAUTIONS
INTRODUCTION
DETAILED INSTALLATION
DESIGN PHILOSOPHY
TECHNICAL DATA
CARE & HANDLING
WARRANTY & DISCLAIMER
WARRANTY REGISTRATION
8
5
6
7

!
CAUTION
CAUTION
WARNING
WARNING
1
SAFETY PRECAUTIONS
CAUTION -
-
-
-
-
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.
THIS SYMBOL IS INTENDED TO ALERT
YOU OF THE PRESENCE OF
IMPORTANT OPERATING AND
MAINTENANCE INSTRUCTIONS IN THE
LITERATURE ACCOMPANYING THE
UNIT.
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 recommend that during extended periods of non-use
that the units power cord be unplugged from its AC power
source.
Route the AC power cord so that it will not be damaged or
walked on.
!

Thank you for purchasing the AMPLIFIER 60.0
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 capabilities of the 60.0 we recommend that you read this entire manual
carefully.
INTRODUCTION 2

DETAILED INSTALLATION 3
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 from panel controls and their signal paths.
1. The unbalanced and balanced inputs should be attached to the appropriate unbalanced
and balanced outputs of a preamplifier 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: 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.
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
34
6
8
USE ONLY SPECIFIED FUSE TYPE
NEG. OUTPUT POS. OUTPUT
2
5
1
PUSHPUSH

1
60.0
CODA TECHNOLOGIES INC.
+ BANK - BANK
2 2
CODA TECHNOLOGIES INC.
DETAILED INSTALLATION 4
II. Front Panel Control Functions and Indicators
1. The bias control button enables and disables the amplifier by toggling the bias which
enables the amplifier’s outputs and switching shunting relays to mute the input.
2. The rail status LEDs indicate that the positive and negative amplifier rails are enabled and
working.
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.

5
DESIGN PHILOSOPHY
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 60.0. 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 ensures 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 toridal transformers and over
184,000 uF 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 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 28 individual output transistors with
a combined power rating of 1500 Watts and 120 Amperes with a bandwidth of 50 Mhz.
The 60.0 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 seamless performance regardless of the complexity of the
load impedance and is particularly effective at eliminating IM distortion which often occurs in
these instances.

6
DESIGN PHILOSOPHY
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 60.0 result in absolute control of bias currents under all conditions.
The main power supply of the amplifier consists of a 3000VA transformer with independent
rectifiers to isolate the channels from one another. 184,000 uF of total capacitance provide
effective filtering of all AC ripple.
These attributes result in an 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 20,000Hz. the resulting uniform
damping factor is not commonly found in other designs.
The chassis of the 60.0 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 60.0 uses six massive aluminum
heat sinks without fans for efficient, noiseless and clean thermal relief. The thermal coefficient
of the 60.0 heat sinks is one of the lowest and most effective in the audio industry.

7
DESIGN PHILOSOPHY
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.

8
TECHNICAL DATA
BRIDGED MONO
Rated Power 1000 Watts class AB @ 4 Ohms
Frequency Response: DC to -3dB @ 100kHz
Distortion: < .02 percent from 10Hz to 20kHz @ rated power
Gain: 32dB
Maximum Current: > 100 Amperes peak
Noise: -120dB reference to rated output
Input Impedance: N/A unbalanced/10k Ohms balanced
Output Impedance: .06 Ohms from 20Hz to 20kHz
POWER SUPPLY
Transformer Type: Multi-tap, multi-winding toroidal
Transformer Rating: 3 kVA
Power Filtering: 184,000 ìF
DIMENSIONS
Height: 7” Faceplate, 7.75” Overall
Width: 18” Overall
Depth: 19” Overall
Weight: 110 lbs., 115 lbs. Shipping
Power Requirement: 1.5K Watts maximum at rated power

9
CARE & HANDLING
The interior of the unit requires no special care. If it becomes necessary to clean the exterior,
a simple dusting may be all that is required. If a cleaner is necessary, any dilute commercial
ammonia based product will be appropriate. NEVER use any abrasive rags, cleaners or
chemical solvents on Coda products.
When handling the unit, take care not to mar the aluminum. Aluminum is a medium hardness
metal and can be scratched by the harder tool steels.
Avoid exposing the unit to direct sunlight, and keep it away from sources of intense heat.
Do not throw away the carton or associated packing material. They are ideal if you need to
pack the unit for moving and in the unlikely event that servicing is needed, they will be
necessary for safe shipment.
Be sure to provide adequate insurance when shipping.

10
WARRANTY & DISCLAIMER
I. Warranty - Any failure of the Amplifier 60.0, hereafter known as the product or original
product, to operate or to meet specifications, applicable at time of manufacture, due to a
manufacturing defect or component failure, will be corrected by Coda Technologies without
charge for parts or labor, for a period of ten years from date of original purchase. Coda
Technologies will provide for surface transportation to and from the factory for a period of one
year from date of original purchase.
II. Procedure - If the product should require service under warranty contact Coda
Technologies at the location on the back cover of this manual for shipping instructions.
Products purchased outside of the United States will be covered by the warranty conditions
extended by the importing distributor which may differ from those given above.
III. Exclusion of Coverage - Coda Technologies is not obligated to service the product in
certain conditions, as according to the following subsections.
a. The product has been damaged through:
i. operation not in accordance with the instructions in this manual
ii. abuse, tampering, modification or accident
iii. serial number defacement
b. The product has been transferred to a third party. This warranty is valid only for
the original purchaser of the product.
c. The product has been transported outside of the United States of America.
In these conditions any service will be made at Coda Technologies sole option.
IV. Total Loss and Replacement - If the product is submitted for service due to a severe
malfunction which has caused damage sufficient enough to make a repair attempt infeasible,
the product will be replaced with another unit of equal or superior specifications. Coda
Technologies product line is frequently updated and changed, and the specific model and
version of the original product may be discontinued at any time without notice. In this case no
guarantees are made that the replacement unit will be visually similar to the original product.
V. Subjective Differences - No guarantee is made that the product will perform to any
specifications that cannot be measured and confirmed with precision audio analysis
equipment. Coda Technologies is only obligated to make repairs which will bring the product
into compliance with the specifications stated in this manual.
VI. Unnecessary Service - In all conditions, if the product is submitted for service and found
to be operated without fault and within specifications, shipping charges will be billed to the
customer.
This warranty gives you specific legal rights. You may have other rights which vary from state
to state.
Disclaimer - Coda Technologies cannot be held responsible for any damage caused by their
products, including but not limited to:
a. Damage to speakers caused by failure of a Coda Technologies product to mute
or disable itself as expected or described in its manual.
b. Damage caused by connecting a load to a Coda Technologies product having
an improper impedance as described in the products manual.
c. Damage caused by defects in design, construction or component quality.

11
WARRANTY REGISTRATION
Fill in this registration sheet and fax or mail it to Coda Technologies to ensure you are in our
warranty system. This will facilitate warranty service should it become necessary.
It is recommended that you retain a copy of this form for your own records. Coda
Technologies’ address and fax number are located on the back of this manual.
MODEL DESIGNATION:
SERIAL NUMBER:
DATE OF PURCHASE:
PLACE OF PURCHASE
Name:
Address:
City: State: Zip:
Phone:
OWNER INFORMATION
Name:
Address:
City: State: Zip:
Phone:
NOTES:

7850 CUCAMONGA AVENUE #34
SACRAMENTO, CA 95826 USA
phone fax
on the web at
email us at
+01 916.383.3653 +01 916.455.3653
CODA.CC
[email protected]