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CAUTION
RISK OF ELECTRIC SHOCK
DO NOT OPEN
CAUTION: TO REDUCE THE RISK OF ELECTRIC SHOCK
DO NOT REMOVE COVER (OR BACK)
NO USER-SERVICEABLE PARTS INSIDE
REFER SERVICING TO QUALIFIED SERVICE PERSONNEL
The lightning flash with arrowhead symbol
within an equilateral triangle 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.
The exclamation point within an equilateral
triangle is intended to alert the user of the
presence of important operating and main-
tenance (servicing) instructions in the literature
accompanying the appliance.
Introduction ............................................................1
Unpacking and Paperwork .....................................1
Features and Specifications
pm125.................................................................2
pm420.................................................................4
Controls and Functions...........................................6
Installation
Location and
General Precautions............................................8
Mechanical Considerations ................................8
Rear Support for
Road Applications ..............................................8
Thermal Considerations......................................8
AC Power Considerations..................................9
Magnetic Leakage
Considerations....................................................9
Installation (continued)
Input Wiring........................................................9
Input Sensitivity................................................10
Output Wiring...................................................10
Polarity..............................................................10
Dual Mono........................................................10
Bridged Mono...................................................11
Parallel Mono ...................................................11
Clipping Eliminator..........................................11
Operating Tips
Using the pm125/pm420..................................12
Servicing Instructions...........................................13
In Case of Difficulty.............................................14
Care and Service Assistance.................................15
Warranty Information ...........................................16
Safety Information
Table Of Contents
Introduction
Congratulations on your purchase of a new Carver Professional Power Amplifier. It is backed by
state-of-the-art engineering and manufacturing techniques to bring you the best in quality
craftsmanship and reliable performance. The pm125 and pm420 are specially designed for pro
sound applications. Their rugged construction and low profile make them ideal for sustaining the
abuses of the road with reliability and space-saving economy. And their accurate sound and
ample power make them ideal for critical studio applications as well. The pm125 is rated at 62 watts per
channel into 4 ohms and 50 watts per channel into 8 ohms. In bridged mono operation it is rated at 125
watts into 8 ohms. The pm420 is rated at 210 watts per channel into 4 ohms and 135 watts per channel
into 8 ohms. In bridged mono operation it is rated at 420 watts into 8 ohms. The sophisticated protection
circuits designed into these amplifiers will protect your system should an unexpected fault occur. They
also protect the amplifiers from excessive temperature, continuous current limiting and shorted outputs.
The balanced input uses a high quality, high common-mode rejection differential amplifier for
exceptional hum and noise rejection. These power amplifiers were designed and manufactured by people
with a lifetime commitment to providing the world’s finest components for music and sound
reproduction. Thanks for placing your confidence in Carver Professional. We know your amplifier will
provide many years of dependable service and reliable sound reproduction.
Unpacking and
Paperwork
Carefully unpack the amplifier and keep the original carton and packing materials for future moving,
shipment or long-term storage. After opening the box, please check for any visible signs of damage that
were not apparent from the outside of the box. If you do encounter what appears to be concealed damage,
please consult your Carver Professional Dealer before installing the unit.
Important Paperwork
Make sure to save your sales receipt. Your receipt is extremely important to establish the duration of your
Limited Warranty and for insurance purposes. Next, make a note of the serial number which is located on
the back of the amplifier. Record it in the space provided below for convenient reference.
Model_________ pm125_______ pm420
Serial Number: _____________________
Purchased at: ______________________
Date: _____________________________
F i n a l l y, take a moment to fill out and return the Warranty Registration Card packed with the amplifier and
return it to Carver Professional. This will allow us to keep you informed about new products as they
become available.
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