Cary Audio Design Stereo Amplifier CAD 211M User Manual

CAD-211M  
OPERATING MANUAL  
Note:  
Before installing you new CAD-211M, please read this manual carefully. This manual will  
inform you of the CAD-211M specifications, proper installation procedures and operation  
procedures. Also included in this manual are guidelines on how to properly service and care  
for your new CAD-211M.  
 
2 - 300B Driver  
2 - 6SN7 Input  
OUTPUT IMPEDANCE: 4,8 and 16 ohm  
INPUT POWER  
REQUIREMENTS:  
117V/220V 50 - 60 Hz  
POWER CONSUMPTION: 265 watts "OPERATE"  
220 watts "STAND BY"  
DIMENSIONS:  
10"H x 12 1/4"W x 24"D  
NET WEIGHT:  
90 lbs  
SHIPPING WEIGHT:  
125 lbs  
POWER  
TRANSFORMER:  
300 percent duty cycle wax impregnated OFC copper  
OUTPUT  
TRANSFORMER:  
200 percent duty cycle wax impregnated OFC copper  
oil filled  
CAPACITORS:  
POWER SUPPLY  
CAPACITORS:  
1500MF, 450V  
AC CORD:  
detachable  
WARM-UP TIME:  
BREAK-IN PERIOD:  
5 minutes  
100 hours of music playing time  
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1.3  
Top Panel Features  
AC-ON SWITCH:  
Turns AC power on  
Turns high voltage on  
STAND-BY SWITCH:  
1.4  
Rear Apron Features  
OUTPUT:  
Three 5-way copper binding posts provide outputs for 4 ohm, 8 ohm and  
16 ohm  
AC:  
3 conductor shielded power cord to AC power mains  
INPUTS:  
One Single-Ended Input via gold plated RCA jack  
One Balanced Input via XLR connector (Note: When using Balanced  
Input, the toggle switch , located next to the XLR input jack, must  
be flipped toward the XLR jack)  
CAUTION  
Use of any other protection  
fuse can damage unit.  
FUSE:  
AC power fuse. Never replace with any other fuse than 5 amp.  
SLOW BLOW! 250 VOLT!  
Tube fuse. Never replace with any other fuse than 1/2 amp.  
FAST BLOW! 250 VOLT!  
CAUTION  
Never remove/insert  
AC line cord when the  
unit is "ON"  
4
 
INSTALLATION  
This section describes the unpacking and installation procedures for the CAD-211M  
mono-blocks.  
WARNING  
Do not attempt operation without the  
bottom plate attached. Contact with  
voltage in the  
CAD-211M can be fatal!!!  
2.2  
Unpacking  
All shipping containers have been specifically designed to protect its contents and special  
care has been taken to prevent damage under normal shipping conditions. Mishandling  
should be evident upon inspection. If damage is found, take care not to destroy the  
evidence. Document any damage with photographs and contact the transport carrier  
immediately.  
Carefully remove the CAD-211M amplifier from its packing carton and examine closely  
for signs of shipping damage. Save all original packing cartons for future storage or after-  
sale service.  
2.3  
Warranty Card  
Fill out the enclosed Warranty Registration Card and return to Cary Audio Design within  
10 days of the original purchase. Keep your original sales slip and packing cartons for  
future reference. Failure to register warranty will limit the warranty to one year.  
2.4  
Amplifier Placement  
In general, the location of the CAD-211M amplifier is not critical. The best placement of  
the amplifier is near the speakers with short lengths of speaker cables. Certain precautions  
must be taken to avoid radiators or other heating units. Keep the top of the CAD-211M  
clear of books, paper or other equipment to protect against overheating.  
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2.5  
Power Requirements  
The CAD-211M is designed to operate from house current mains. The design voltage is  
117 VAC at 50/60Hz. (Foreign units 220 VAC at 50/60 Hz)  
2.6  
Cables  
The speaker cables from the output posts to the speaker system can be any convenient  
length required. Select speaker cables of sufficient size to preserve the performance  
capabilities of your new CAD-211M. Heavy gauge #16 wire is suitable for distances up  
to 10 feet; #12 for 25 feet. Most audio dealers will have speaker cable in stock for this  
purpose.  
3.1  
Operation  
Your new CAD-211M is ready for operation after the speaker, interconnect cables and all  
the tubes have been installed. See page 8 for tube positions.  
3.2  
AC-On Power Switch  
Simply push the AC-On switch to the "ON" position. Observe that all tubes are lit  
(filaments). After 30 seconds, flip the stand-by switch to the "OPERATE" position. The  
eye tube will then light.  
3.3  
Stand-By Switch  
This is a most convenient feature on the CAD-211M amplifier. The stand-by switch is  
located on the top of the amplifier. In the rear position, the amplifier is ready to operate.  
In the front position, only the tube filaments are operating. You may wish to leave your  
CAD-211M amps turned on in the stand-by mode 24 hours a day. When you wish to  
6
 
listen to music, simply flip the stand-by switch to the “REAR” position. Under these  
conditions the CAD-211M is always ready for peak performance.  
3.4  
Break In Period  
The tubes, capacitors and output transformer take approximately 100 hours of music  
playing time to operate at peak performance. The CAD-211M may seem sterile or thin  
sounding right out of the box. After the first couple of hours, you will notice increased  
depth and tighter bass. This break-in period defies all engineering theory, but is true with  
most audio amplifiers.  
WARNING  
Make sure amplifier is  
unplugged from AC mains  
for any service or  
cleaning!  
SERVICE AND CARE  
4.1 Care and Cleaning  
The chassis of the CAD-211M may be cleaned with a soft towel and Windex® (or a  
similar window cleaner). The frequency of cleaning will be governed by how many hours  
the CAD-211M is operated and by operating environmental cleanliness.  
4.2 Tube Replacement  
If it becomes necessary to replace the tubes in the CAD-211M amplifier, a matched set of  
tubes of the same brand should be used. Although tube life varies depending on the nature  
and degree of use, under normal operating conditions for home use, the tubes in the CAD-  
211M should last several years or more.  
4.3 Factory Service  
In the design of the CAD-211M, careful consideration was given to keep maintenance  
problems to a minimum. However, it is possible that problems may arise which cannot be  
cured by tube substitution. At this point, contact our Customer Service Department,  
(919) 481-4494, to describe you problem in detail. Do not return the CAD-211M to the  
7
 
factory without a Return Authorization Number from the Customer Service Department.  
Cary Audio Design will not assume responsibility for transit damage or loss if problems  
are due to improper packing or lack of insurance.  
WARNINGS  
Make no attempt to put the CAD-211M in service outside  
of the cabinet. Contact with high voltages found in the unit  
can be fatal!!!  
Completely remove AC Power Cord from the wall and  
allow 30 minutes for the high voltage capacitors to  
discharge through bleeder resistors before attempting to  
change tubes or clean the inside of the amplifier.  
CAUTIONS  
Never remove/insert AC Plug when the unit is on or the AC  
Power Switch is in the “ON” position.  
Obstruction of the top portion of the CAD-211M will  
result in tubes overheating.  
OBSERVE DIRECTIONS IN THIS MANUAL  
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