CANARY AUDIO CA-770 User manual

CANARY AUDIO®
EL34 Stereo Power Amplifier
Handcrafted in California
CA-770
OWNER’S MANUAL
MADE IN USA

!This symbol is intended to alert the user to the presence
of important operating and maintenance (servicing)
instructions in the literature accompanying the unit.
The lightning flash with arrowhead symbol is intended to
alert the user to the presence of uninsulated “dangerous
voltage” within the product’s enclosure that may be of
sufficient magnitude to constitute a risk of electric shock
to persons.
Dear Customer:
Please allow us to take this opportunity to thank you for purchasing this
CANARY AUDIO product.
We strongly recommend that you carefully study the Safety Instructions before
attempting to operate the unit.
After you have finished reading the instructions, please save this manual for
future reference.
WARNING:
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT EXPOSE
THE UNIT TO RAIN OR MOISTURE.
CAUTION:
TO PREVENT ELECTRIC SHOCK, DO NOT USE THIS POLARIZED AC PLUG
WITH AN EXTERSION CORD, RECEPTACLE OR OTHER OUTLET UNLESS
THE BLADES CAN BE FULLY INSERTED TO PREVENT BLADE EXPOSURE.
TO REDUCE THE RISK OF FIRE OR ELECTRIC SHOCK, DO NOT REMOVE
COVER (OR BACK). NO USER SERVICEABLE PARTS INSIDE. REFER SER-
VICING TO QUALIFIED SERVICE PERSONNEL ONLY.

SAFETY INSTRUCTIONS
Power Source:
•The unit should be connected to an AC power source of the proper rated
voltage.
•Never replace the power supply’s line fuse with the one of incorrect
characteristics.
AC Cord Protection:
•Do not defeat the grounding or polarization feature of the AC cord.
•Make sure that the AC receptacle holds the AC cord plug firmly and securely.
•Keep the AC cord away from heating appliances.
•Never put heavy object on the AC cord.
•If smoke, malodors or noises are emitted from the unit, turn the power off and
disconnect the AC cord.
Keep Away from Water and Moisture:
•This unit should not be used near water.
•Keep the unit away from flower vases, bathtubs, washbowls, kitchen sinks,
laundry tubs, swimming pools, etc. If liquids are spilled into the unit, serious
damage could occur.
Ventilation:
•Slots and openings in the chassis and in the back or bottom are provided for
necessary ventilation.
•Do not place a cloth on top of the unit or block the provided ventilation slots
and openings in any other way.
•Do not place the unit on a bed, sofa, rug or other similar surface which may
block the slots and openings.
•Do not place the unit in a confined space, such as a bookcase or built-in
cabinet, unless proper ventilation is provided.
Non-Use Periods:
•When left unused for a long period of time, the unit should be unplugged from
the AC outlet.

PROPER CARE
Break-in Period:
•As with most audio components, the CA-770 requires a “break-in” period.
During this period the internal components will stabilize and reach their
normal operating parameters. There are no special procedures required for
this break-in period, just listening to your favorite music will accomplish this
task all by itself.
•The time required to break in the CA-770 is approximately 30 to 50 hours.
Upon completion of the break-in period you will hear an improvement in the
overall sound quality of the amplifier.
No Fingers or Other Foreign Objects:
•Touching internal parts of this unit is dangerous and may cause serious
damage to the unit. Do not attempt to disassemble the unit.
•Do not put any foreign object into the unit through the ventilation slots and
openings.
Cleaning:
•A regular dusting with a soft, non-abrasive cloth will generally keep the finish
of the faceplate and chassis looking like new.
Packing Materials:
•The original packing materials and shipping boxes are custom designed to
prevent shipping damage from occurring.
•We recommend that you retain all of the packing materials and shipping
boxes for your CA-770 to be covered by warranty.
Registration Card:
•To ensure that your CA-770 is registered, please spend a moment now to
complete and return the Registration Card.
•Save a copy of the Registration Card and the bill of sale as proof of purchase
for future reference.

UNPACKING
•Open the shipping boxes and remove the top layer of foam.
•Remove the owner’s manual and other accessories from the packing box.
•Grasp the underside of the amplifier and lift it straight out of the packing box.
•Place the amplifier in a safe location. Remove the protective plastic wrapping.
•After unpacking the CA-770, inspect it for any shipping damage and contact
us immediately if any is found. Do not plug the power supply into any outlet if
you find any shipping damage.
•Please keep all packing materials for future transport of your player. Shipping
the CA-770 in anything other than its original boxes may result in damage that
is not covered by warranty.
ACCESSORIES
The following items are included in the package aside from the main unit:
•Owner’s manual
•Warranty card
•AC power cord
PLACEMENT
•Do not place the unit near a heating device or in a location where it is
exposed to direct sunlight.
•Do not place the unit in an excessively humid or dusty location.
•Avoid placing the unit in the areas of vibration, impact or where the surface is
tilted as the internal parts may be seriously damaged.
•Avoid placing the unit next to kitchen counters or other locations where it is
subjected to oily fumes.
•Place the unit in a horizontal position, and do not place anything heavy on it.
•Do not place the unit on any other equipment which may become hot.

CONNECTION STEPS
1. Place the CA-770 in a rack, on a shelf or on the floor.
2. Turn off any associated components prior to connecting the CA-770. This
minimizes the chance of momentary electrical surges disturbing your
system.
3. Neatly arrange and organize wiring to and from the Evolution amplifier and
all components. Separate AC wires from audio cables to prevent
hum or other unwanted noise from being introduced into the system.
4. Connect the outputs of your preamplifier or any audio source equipment
to the inputs on the back of the CA-770. Be sure to match up the left and
right conductors appropriately.
5. Connect the loudspeaker cables to the loudspeaker binding posts on the
back of the CA-770. Use only the binding post (4 or 8 ohms) that matches
the impedance of the loudspeaker.
Be sure to connect the polarity of the speaker cables correctly. Match the
positive (red) and negative (white) binding posts to the corresponding
speaker connections.
The custom made binding posts are capable of accepting speaker cable
with spade lug, banana plug, pin connector or bare wire.
6. With the power switch in the OFF position, attach the power cord to the
CA-770 and connect it to your AC outlet.
Use the supplied AC power cord or an aftermarket cable. For optimum
results, we recommend the use of Canary Nickel PW-ONE power cable.
7. First, turn on your source equipment. Then, turn on the CA-770.

TUBE BIASING
Bias voltage applied to the grids of the power tubes in the output stage should be
checked from time to time to keep these tubes operation at the optimum
operating point. A properly biased power tube will have a longer life.
To check and adjust the bias voltage of the EL34 tubes, simply follow the
following procedures.
Tools Required:
Digital Multimeter
Long-handled slotted screwdriver
Procedures:
1. Making sure that the power switch is in the OFF position.
2. Connect your speaker leads, input cable and power cord to the amplifier.
3. Loosen the screws that secure the top cover of the amplifier to the chassis.
Remove the top cover to get access to the inside of the amplifier.
4. Turn ON the amplifier.
5. Turn on the multimeter. Select the section for measuring up to 20V DC.
Attach and secure the negative test lead to the chassis or to the binding post.
6. Carefully insert the positive test lead into the bias measuring point labeled as
T1 on the main PC board.
7. Carefully insert a long-handled slotted screwdriver into the bias adjustment
pot labeled as VR1 on the PC board. Slowly rotate the screwdriver to adjust
the bias voltage until it reaches 0.35V.
8. Repeat steps 6 and 7 to adjust the bias voltage for the three remaining tubes
in the same fashion as biasing the first one. Use measuring points labeled
as “T2, T3 and T4” for measuring, and bias adjustment pots labeled as “VR2,
VR3 and VR4” for adjusting. You will need to go back and forth a few times
until all four tubes are properly biased.
9. Once you have finished biasing all four tubes, wait a few minutes and recheck
the settings again.
10.Turn the power OFF. Detach the negative test lead from the chassis. Put the
top cover and the screws back on to the amplifier.
11.The CA-770 power amplifier is now ready to use.

SPECIFICATIONS
Model: CA-770
Rated Power Output: 40 Watts RMS
Input Sensitivity: 0.45 Volts for full output
Input Impedance: 100,000 Ohms
Frequency Response: +/- 1 dB from 20 Hz to 55,000 Hz
Total Harmonic Distortion: < 0.5%
Signal-to-Noise ratio: -82 dB below 1 Watt
Damping Factor: 12
Power Consumption: 275 Watts (true RMS)
Output Impedance: 4, 8 Ohm
Tube Complement: 4 - EL34 / 6CA7
4- 6SN7
Dimensions: 18” W x 16” D x 6.5” H
Weight: 55 lbs.
Note:
Specifications are subject to change without notice. Weight and dimensions are approximate.

LIMITED WARRANTY
Canary Audio warrants to the original purchaser that each CA-770 power
amplifier is free of manufacturing defects for a period of three (3) years from the
date of purchase. To receive this warranty, the original purchaser must complete
the enclosed Warranty Registration Card and mail it to Canary Audio within thirty
(30) days from the date of purchase. Canary Audio will then validate the warranty
to the original purchaser.
This warranty does not cover cosmetic damage or damage due to acts of God,
accident, misuse, abuse or negligence. This warranty does not cover damage
due to improper operation or maintenance, use with incompatible accessory,
connection to improper voltage supply, or attempted repair, modify or upgrade by
anyone other than Canary Audio or a facility authorized by Canary Audio. This
warranty does not cove any damages to the vacuum tubes and does not cover
normal maintenance.
Canary Audio shall not be responsible in any way for consequential or indirect
damages or liabilities resulting from the use and operation of the product covered
herein or resulting from any breach of this warranty or any implied warranty
relating to said product. Under no circumstances does Canary Audio assume
liability or responsibility for injury or damages sustained in the use or operation of
this equipment or for damages to any other equipment connected to it.
During this stated period, Canary Audio will repair or replace any defective
components free of charge. A Return Authorization Number (RA Number) is
required before any product is returned to our factory for any reason. This
number must be visible on the exterior of the shipping container(s).
Units to be repaired by Canary Audio must be sent shipping and insurance
prepaid by the original purchaser in the original packing material. Canary Audio
will accept no responsibility for any damage occurring to the unit that is shipped
in packing material other than the original packing material. A written description
of the defect and a copy of the original bill of sale should be accompanied with
the returned product.
This warranty applies only to the first end-user purchaser of a CA-770 power
amplifier that is purchased and used in the United States of America and is not
valid for subsequent purchasers. All other warranties or conditions either written
or implied are void.
Canary Audio
P.O. Box 6216, Rosemead, CA 91770, USA
Telephone: [phone]
Http://www.canaryaudio.com