Cary Audio Design Stereo Amplifier CAD 211 AE User Manual

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CAD 211 AE  
Mono Power Amplier  
NOTE: Before installing your new component, please read this manual carefully  
as it will inform you of the product specications, proper installation and correct  
operating procedures for your unit. Also included in this manual are guidelines  
on how to service and care for your new Cary Audio Design product.  
 
INTRODUCTION____________________________________________________  
Congratulations!  
You have just purchased one of the most outstanding amplifiers ever made. After ten years of continuous  
production we proudly announce the CAD 211 Anniversary Edition! Operating the amplifier is a simple  
procedure. Each unit is designed for long term stability in virtually any home operating situation. Note  
that if the unit is operated outside the parameters outlined in this owner’s manual, damage may result.  
Please read this manual carefully before operating your new CAD 211 AE power amplifier.  
When the following cautionary terms are used in this manual, these definitions apply:  
WARNING  
Electrical hazard! Misuse or failure to follow instructions properly may result in personal injury  
or death!  
CAUTION  
No risk or personal injury; however, misuse or failure to follow instructions may result in  
damage to equipment.  
NOTE  
No risk of personal injury or equipment damage; however, misuse or failure to follow  
instructions may prevent proper performance of the equipment.  
3
 
SPECIFICATIONS ___________________________________________________  
This section describes the basic specifications of the 211 AE amplifier at the time of printing. Specifications  
are subject to change without notice or obligation.  
........................................................................................................................................................................................................................  
POWER OUTPUT  
........................................................................................................................................................................................................................  
FREQUENCY RESPONSE 20 to 20 kHz + 0.5 dB  
........................................................................................................................................................................................................................  
AC POWER REQUIREMENTS 100, 110, 117, 220, 240, / 50-60 Hz, set by market  
........................................................................................................................................................................................................................  
POWER CONSUMPTION 230 watts – Operation, 76 watts – Standby  
........................................................................................................................................................................................................................  
INPUT IMPEDANCE 150,000 ohms (150k Ω)  
........................................................................................................................................................................................................................  
OUTPUT IMPEDANCE 4, 8 and 16 ohm speaker connection terminals  
........................................................................................................................................................................................................................  
NOISE > 80 dB below rated output  
........................................................................................................................................................................................................................  
SENSITIVITY 1.0 Volt @ zero feedback for full output  
........................................................................................................................................................................................................................  
COUPLING CAPACITORS Oil filled capacitors  
70 Watts Class A operation mode, 110 watts Class A-2  
........................................................................................................................................................................................................................  
POWER SUPPLY CAPACITORS 4-1500 μFd @ 450V  
........................................................................................................................................................................................................................  
TRANSFORMERS  
1 - EI Laminated core power transformer  
1 - Special air-gap output transformer  
200% duty cycle on all transformers  
........................................................................................................................................................................................................................  
TUBE COMPLIMENT  
In each amplifier chassis  
1 - 1629/6U5 ‘Cat Eye’ tube  
2 - 6SN7 input tubes  
2 - 300B driver tube  
2 - 845 output tube  
........................................................................................................................................................................................................................  
WARM-UP TIME 5 minutes, after initial break in period  
........................................................................................................................................................................................................................  
BREAK-IN PERIOD 100 hours of music playing time  
........................................................................................................................................................................................................................  
FINISH Jaguar ‘Anthracite Black’ chassis  
........................................................................................................................................................................................................................  
AC CORD 3 conductor cord, Detachable  
........................................................................................................................................................................................................................  
DIMENSIONS 10” H x 12.25” W x 24” D (25.4 x 31.2 x 61 cm)  
........................................................................................................................................................................................................................  
WEIGHT 90 lbs. (38.6 kg.)  
........................................................................................................................................................................................................................  
SHIPPING WEIGHT 126 lbs. (47.7 kg.)  
........................................................................................................................................................................................................................  
4
 
FEATURES __________________________________________________________  
Front Panel  
........................................................................................................................................................................................................................  
CAT EYE TUBE  
Indicates approximate power output level  
When the eye is completely closed the amplifier is at full power output  
........................................................................................................................................................................................................................  
Top Panel  
........................................................................................................................................................................................................................  
OFF-ON TOGGLE SWITCH  
Turns AC power on in the rear position  
The output tube will not light at this point  
........................................................................................................................................................................................................................  
STANDBY SWITCH Turns the filament of the output tube on in the rear position  
........................................................................................................................................................................................................................  
TUBE SELECTOR SWITCH Set either to 211 or 845 before installing selected output tube  
........................................................................................................................................................................................................................  
FEEDBACK LEVEL Adjusts the level of feedback from 0 to 10 dB  
........................................................................................................................................................................................................................  
Rear Apron Features  
........................................................................................................................................................................................................................  
INPUT  
Signal input connection via shielded RCA interconnect cable  
........................................................................................................................................................................................................................  
OUTPUT  
Three 5-way binding posts provide output to the speaker  
system (4, 8 or 16 ohm connections)  
........................................................................................................................................................................................................................  
FUSE  
AC power fuse. Never replace with any other value than  
3 AMP SLOW BLOW FUSE! 250 VOLT!  
........................................................................................................................................................................................................................  
TUBE FUSE Never replace with any other fuse than ¼ amp FAST BLOW FUSE!  
........................................................................................................................................................................................................................  
5
 
INSTALLATION _____________________________________________________  
This section describes the unpacking and installation procedures for your new component.  
Unpacking  
All Cary Audio Design shipping crates have been specially designed to protect their contents and special  
care has been taken to prevent damage under normal shipping conditions. Mishandling should be evident  
upon inspection of the shipping container. If shipping damage is found after visual inspection, take care  
not to destroy the evidence. If necessary, document the damage with photographs and contact the  
transport carrier immediately.  
Carefully remove your new component from its packing carton and examine it closely for signs of shipping  
damage. We strongly recommend saving all original packing cartons to protect your component from  
damage should you wish to store it or ship it for after-sales service.  
Warranty Card  
IN THE USA: If you are the original purchaser of a new unit from an AUTHORIZED CARY AUDIO DESIGN  
DEALER, please fill out the enclosed warranty registration card and return it to Cary Audio Design within  
15 days of your purchase. Cary Audio Design also suggests that you keep your original packing cartons in  
case you ever need to ship the unit when moving to a new home. Warranty restrictions apply. Consult the  
warranty section at the end of this manual for details. Please be certain to keep a copy of the original sales  
receipt from your AUTHORIZED CARY AUDIO DESIGN DEALER to validate the warranty if ever needed. The  
warranty is for the original purchaser only and does not transfer to any subsequent owner.  
OUTSIDE THE USA: Your local Authorized Cary Audio Design Distributor will make his own warranty policy  
for your country. Please check with them for the terms of warranty for your new amplifier.  
Placement  
The CAD 211 AE is designed for use in homes. It must be protected from the elements and temperature  
extremes. For example, avoid placing the unit in extremely hot locations such as near radiators or other  
heating units. Its location among the user’s audio components is not critical; however, certain precautions  
must be taken. Avoid moisture, direct sunlight, and dusty areas.  
Power Requirements  
The CAD 211 AE is designed to operate from house current AC mains. The design voltage is 117 Volts AC  
at 50/60Hz (Foreign units 234 Volts AC at 50/60Hz).  
Speaker Cables  
The speaker cables from the output posts of the CAD 211 AE to the speaker system can be any length that  
your setup requires. Select speaker cables of sufficient size to preserve the outstanding performance  
capabilities and sound quality of your new power amplifiers.  
Heavy duty #14 gauge wire is suitable for distances up to 15 feet; #10 gauge is good for 25-30 feet. Most  
audio dealers have high performance speaker cable in stock for this purpose. We strongly urge you to try  
several types to find the best ones for your combination of components and speakers.  
6
 
Interconnect Cables  
Signal input connection is made via the RCA input jack on the rear of the amplifier located next to the  
output binding posts. The input interconnect cables from the output of the preamplifier can be any length  
your installation requires. A shielded high quality interconnect cable is important to reduce chances for  
hum or interference. Ask your Authorized Cary Audio Design audio dealer for advice.  
WARNING!  
Page 10 shows correct tube placement positions, 300B tube bias settings and ‘Cat Eye’ tube  
brightness adjustment. Page 11 shows 300B tube pin configuration. FAILURE TO INSTALL THE  
TUBES CORRECTLY WILL DAMAGE THE UNIT. Watch the tube pins carefully on the 300B tube  
during installation as it is possible to force the tube to plug in ‘wrong’ during installation. The  
300B tube has no ‘safety key’ center pin on the tube to prevent incorrect installation. It has two  
large pins and two slightly smaller pins. Please look carefully at the tube pins and the tube  
socket holes to note the two different size connections prior to installation. Incorrectly  
plugging in the 300B driver tube will possibly damage the amplifier and is not covered by the  
manufacturer’s warranty.  
OPERATION ________________________________________________________  
Your new amplifier is ready for operation after the speaker cables, interconnect cables and the tubes have  
been installed.  
On-Off Power Switch  
Push the AC toggle switch toward the rear, to the “ON” position. The 6SN7 input tubes, 1629 Cat Eye tube  
and the 300B driver tube will light up in this setting.  
Standby Toggle Switch  
Push the toggle switch toward the rear of the unit to operate. The installed output tube will light up.  
Break In Period  
The tubes, capacitors and the output transformers take approximately 100 hours of music playing to fully  
settle in for peak performance. Small imperfections in the tube surfaces will ‘boil off’ during the break in  
period as well. The amplifier will sound good right out of the box but it will improve as break in occurs.  
After the first couple of hours you will notice increased depth and tighter bass. This break in period is true  
with most high performance audio amplifiers.  
7
 
SERVICE AND CARE ________________________________________________  
The chassis may be cleaned with a soft towel and Windex® (or a similar window cleaner). Spray it on the  
cleaning cloth to moisten it, not on the component. Do not use solvents or harsh chemicals as they may  
remove the labels from the chassis. The frequency and need of cleaning will be governed by operating  
environmental conditions. Avoid letting the component become dusty or wet. A ‘feather duster’ type  
cleaner will also work well for cleaning the component.  
Replacing Vacuum Tubes  
If it becomes necessary to replace the tubes, the same brand as installed new should be used. A complete  
new tube kit is available from Cary Audio Design. Although useful tube life varies depending on the nature  
and degree of use, under normal home use, the 845 or the 211 output tube and the 300B driver tube  
should last many years in the CAD 211. The 6SN7 input tubes should last even longer.  
NOTE: Any current production or New Old Stock (NOS) types of 845, 6SN7 or 300B tubes will work fine in  
the CAD 211 Anniversary Edition amplifier. The voltages are fine for all available types.  
WARNING  
Make sure the amplifier is unplugged 30 minutes from the AC mains before replacing the  
tubes to avoid risk of shock and high heat from the 845 tube.  
Factory Service  
Careful consideration has been given to the design of this product to keep maintenance problems to a  
minimum. If problems arise, refer to the trouble-shooting guide at the end of this manual. If the problem  
is not easily solved, we suggest that you contact our Customer Service Department by phone at (919) 355-  
0010, 1–5 pm Eastern Standard Time, to describe your problem in detail. Do not return the component to  
the factory without a Return Authorization Number (RA) from the Customer Service Department.  
Cary Audio Design assumes no responsibility if the transportation company refuses to pay a damage claim  
due to your improper packing or lack of insurance should the unit be lost in shipment. We strongly  
suggest using the original packing cartons for shipping any Cary Audio Design component.  
Non-Warranty Repairs  
Cary Audio Design will provide repair service for its products charging on a time and expense basis. At this  
time, the standard non warranty service bench fee is $125 with all parts used for repair charged extra. This  
may change with time and is not a quote for service. Please call us at 919-355-0010 for more information  
about out of warranty service and repair fees.  
WARNING  
Make no attempt to put the CAD 211 in service outside of the cabinet or with the cabinet  
open! Contact with the high voltages found inside the unit can be fatal! Remove the AC power  
plug from the wall and allow 30 minutes for the high voltage capacitors to discharge through  
bleeder resistors before attempting to change the tubes or to clean the inside the amplifier.  
8
 
CAUTION  
Never remove or insert the AC plug when the unit is on or the AC power switch is in the “ON”  
position. Obstruction of the top portion of the amplifier will result in the tubes overheating.  
TROUBLESHOOTING GUIDE________________________________________  
SYMPTOM  
CAUSE  
REMEDY  
Hum or “Buzzing” in  
speakers  
Ground loop  
Install 2-pin adapter  
on AC cord to float the ground  
300B tube with high plate  
current too high  
Check bias of 300B. If high,  
readjust to proper bias setting  
of 60 mA  
Intermittent or poor connection Replace bad interconnect cable  
of interconnect  
“Popping” or “Spitting”  
noise  
Noisy tube  
If noise is in one channel  
through the speaker, swap one  
section of tubes at a time until  
the noise swaps channels.  
Replace the noisy tube.  
Check bias of output tubes  
Line voltage surge  
If high or fluctuating rapidly,  
replace output tube  
AC fuse blows  
Replace fuse  
Replace tube  
Tube fuse blows  
Shorted tube (300B &  
845 have separate fuses.)  
9
 
Diagrams___________________________________________________________  
Set the 845 tube  
bias to 100 mA DC  
Current  
¼” bias plug  
Insert the ¼” bias meter plug into the bias jack on the back of the amplifier chassis. Connect the bias cable  
red alligator clip to the positive (+) connection on your meter. Connect the bias cable black alligator clip  
to the negative (-) connection on your meter. Check the 845 tube bias current reading and adjust for a  
100 mA reading on the Volt Ohm Meter (VOM) or DC current meter if the reading is different than 100  
mA DC current. Check and readjust to 100 mA again after the CAD 211 amplifier is warmed up for 10  
minutes. Remove the ¼” plug from the bias jack and enjoy the music!  
Note: Bias is factory preset to 100 mA. Bias should be reset when installing a new  
replacement 845 tube.  
The LARGE pair of 300B tube pins should be installed toward the front of the CAD 211 AE amplifier tube  
socket. Look carefully at the tube pins to be sure that you insert them correctly. It is possible to force the  
tube pins into the socket the wrong way if you are not careful! If you install the tube wrong you will  
probably damage the amplifier and the tube. This damage will not be covered by the manufacturers  
warranty for a new amplifier. If you have any doubts about this, have the 300B tube installed by your  
dealer.  
10  
 
300B Tube Pin Layout  
The LARGE pair of 300B tube pins should be installed toward the front of the CAD 211 AE amplifier 300B  
tube sockets. LOOK CAREFULLY at the tube pins to be sure that you insert them correctly. It is possible to  
force the tube pins into the socket the wrong way if you are not careful! If you install the tube wrong you  
will probably damage the amplifier and the tube. This damage will not be covered by the manufacturers  
warranty for a new amplifier. If you have any doubts about this, have the 300B tube installed by your  
dealer. If you will look carefully at the pins and install the large pins to the front of the socket all will be  
fine! These 300B tube pin installation instructions are valid for the 211 AE only.  
300B Tube Socket Pin Layout in the CAD 211 Amp Chassis  
The LARGE pair of tube pins should be installed toward the front of the CAD 211 amplifier tube socket.  
LOOK CAREFULLY at the tube pins to be sure you insert them correctly. It is possible to force the tube pins  
to plug in the wrong way in the socket! PLEASE BE CAREFUL INSTALLING THE 300B TUBE! If you install the  
tube wrong it will certainly blow a fuse and it may damage the amplifier. Correct placement is easy after  
looking carefully at the pin sizes and the pin socket hole sizes in the tube socket.  
Front of the tube socket installed on the CAD 211 chassis  
11  
 
UNITED STATES LIMITED WARRANTY  
Cary Audio Design warrants to the original United States purchaser for use in the United States, that Cary  
Audio Design vacuum tube or solid state power amplifiers, surround sound processors or preamplifiers  
shall be free from defects in parts or workmanship for three (3) years from the date of the original  
purchase. Vacuum tubes, if any are used in the component, are offered a 90 day from purchase date  
exchange policy against defects with the exception of the CAVT 300B vacuum tube which has a (1) one  
year from purchase date exchange policy. Any digital drive design, whether a Cary Audio Design CD or  
SACD player or a Cary Cinema DVD player, has a limited one year parts and labor warranty against defects  
in manufacture. This is a limited warrant, for the original purchaser only and does not transfer to any  
subsequent owner.  
During the limited warranty period, Cary Audio Design or an authorized Cary Audio Design service facility  
will provide free of charge both parts and labor necessary to correct any defects in material or  
workmanship.  
To obtain such warranty service, the original purchaser must:  
1. Complete and send in the warranty Registration Card within 15 days of purchase.  
2. If claiming service the owner must send a fully filled in copy of the original sales receipt along  
with any unit sent in for service showing the AUTHORIZED CARY AUDIO DESIGN DEALER’S  
name, the new selling price, the buyer’s name, e-mail or phone number and address on the  
receipt. Blank receipts will NOT validate the limited warranty for service.  
3. Notify Cary Audio Design as soon as possible after the discovery of a possible defect and  
submit the following information to determine eligibility for warranty:  
(a) The model number and serial number;  
(b) A fully filled in copy of the original sales receipt showing the original selling price,  
purchasers name and address filled in by an AUTHORIZED CARY AUDIO DESIGN DEALER with  
the original date of purchase shown on the form;  
(c) a detailed description of the problem.  
4. Deliver the product to Cary Audio Design or the nearest authorized service facility or ship with  
all freight and insurance charges prepaid, in its original packing container or equivalent, to  
Cary Audio.  
Correct maintenance, repair and use are important to obtain performance from this product. Therefore,  
please carefully read the Operating Manual. This warranty does not apply to any defect that Cary Audio  
Design in its sole discretion determines is due to:  
1. Improper maintenance or repair, including the installation of parts or accessories that do not  
conform to the quality and the specifications of the original parts.  
2. Misuse, abuse, neglect or improper installation.  
3. Accidental or incidental damage.  
WARRANTY DISCLAIMER  
Except for the express warranties stated herein, Cary Audio Design disclaims all other warranties including,  
without limitation, all implied warranties of merchantability and fitness for a particular purpose. The  
12  
 
foregoing constitutes Cary Audio Design’s entire obligation with respect to this product, and the original  
purchaser and any user or owner shall have no other claim for incidental or consequential damages. Some  
states do not allow the exclusion or limitation of incidental or consequential damages, so the above  
limitation and exclusion may not apply to you. This warranty gives legal rights and you may also have  
other rights, which vary from state to state.  
EXCLUSIVE REMEDY  
Notwithstanding the foregoing, the purchaser’s exclusive remedy for any breach of warranty, express or  
implied, is limited to the repair or replacement of the defective unit or the refund of the purchase price, at  
the option of Cary Audio Design. Under no circumstances is Cary Audio Design liable for incidental or  
consequential damages. Any implied warranties imposed by law terminate one (1) year from the date of  
purchase.  
INTERNATIONAL PURCHASERS (Export markets)  
Cary Audio Design warrants its merchandise to purchasers within the United States exclusively for use  
within the United States of America. It provides no other warranties, expressed or implied. If you are living  
outside the USA, please consult with your local dealer or distributor to determine the details of your local  
warranty.  
Cary Audio Design  
1020 Goodworth Drive  
Apex, North Carolina 27539  
Tel: 919-355-0010  
Fax: 919-355-0013  
13  
 
CARY AUDIO DESIGN  
1020 Goodworth Drive, Apex, NC 27539  
phone 919-355-0010  
fax 919-355-0013  
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