Carver pm420, pm125 User Manual

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pm125/pm420

Professional Stereo Power Amplifier

Safety Information

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 maintenance (servicing) instructions in the literature accompanying the appliance.

Table Of Contents

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

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: _____________________________

Finally, 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.

pm125

•50W per channel into 8 ohms

62W per channel into 4 ohms

125W mono into 8 ohms

•1/4-inch TRS input jacks

•Accepts balanced or unbalanced lines

•Multi-way binding post output connectors

•Independent 11 detent Level Controls for CH1 & CH2

•Dual Mono mode for operating both channels with a mono signal

•Bridged Mono mode for combining the power of both channels into a single higher-powered channel

•Input sensitivity set at 1.5V RMS from factory. Internally reconfigurable to 0.775V RMS.

•Internal jumpers to bypass Left and Right Channel Level Controls

•Independent CH1 / CH2 speaker relays will instantaneously disconnect if one of the following

fault conditions is detected: D.C. Offset

Over Temperature Short Circuit

•Additional protection circuitry includes:

Clipping Eliminator

Resettable Circuit Breaker

•Power Ready, Signal Present and Clip / Protect indicators for each channel

•Headphone jack

•Convection cooled

•70V transformer option

•CE 1997 approved

Continuous Average Output Power, both channels driven:

50 watts per channel into

8 ohms at 1kHz, with no more than 0.1% THD

62 watts per channel into

4 ohms at 1kHz, with no more than 0.1% THD

Bridged-mono operation:

125 watts into 8 ohms at 1kHz, with no more than 0.1% THD

Dynamic Headroom:

>2dB

Frequency Response:

20Hz to 20kHz (±0.75dB)

Channel Separation:

>55dB @ 1kHz

Damping Factor: <400

Input Impedance: 22 Kohms unbalanced, 44 Kohms balanced

Sensitivity: Low: 1.5VRMS for rated power into 4 ohms at 1kHz, 193mVRMS for 1W into 4 ohms @ 1kHz

High: 0.775VRMS for rated power into 4 ohms @ 1kHz, 100mVRMS for 1W

Signal-to-Noise Ratio:

>100dB, A-weighted, referenced to rated power into 4 ohms

Headphone Output:

3.0V


	RMS into 60Ω
	(150mW) 11.3VRMS into
	600Ω (213mW)
Slew Rate:	>10V/µS
CMRR:	>40dB @ 1kHz
Power Consumption:
	250W at full power into 4
	ohms (continuous)
Power Requirements:
	120VAC/60Hz (USA and
	Canada) Other voltages
	as required for export
Display:	3 LED indicators per
	channel: READY, SIGNAL,
	CLIP/PROTECT
Size (H x W x D):	1.75˝ (1U) x 19˝ x 13.25˝
	44mm x 483mm x 337mm
Net Weight:	13.8 lbs. (6.3 kgs)
Shipping Weight:	17 lbs. (7.73 kgs)

Due to ongoing continuous product development

features, specifications, and availability are subject

to change without notice.

pm420

•135W per channel into 8 ohms

210W per channel into 4 ohms

420W mono into 8 ohms