Kramer PA-50HZ User manual

P/N: 2900-301013 Rev 1 www.KramerAV.com
USER MANUAL
MODEL:
PA-50HZ
50W Power Amplifier

PA-50HZ –Introduction
i
Contents
Introduction 1
Getting Started 1
Overview 2
Typical Applications 2
Defining the PA-50HZ 3
Connecting the PA-50HZ 4
Connecting the Output to a Balanced/Unbalanced Stereo Audio Acceptor 5
Connecting a Balanced/Unbalanced Stereo Audio Source to the Balanced Input 5
Adjusting the Master Volume 5
Technical Specifications 6

Kramer Electronics Ltd.
PA-50HZ –Introduction
1
Introduction
Welcome to Kramer Electronics! Since 1981, Kramer Electronics has been providing a world
of unique, creative, and affordable solutions to the vast range of problems that confront the
video, audio, presentation, and broadcasting professional on a daily basis. In recent years, we
have redesigned and upgraded most of our line, making the best even better!
Our 1,000-plus different models now appear in 15 groups that are clearly defined by function:
GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Routers; GROUP 3: Control
Systems; GROUP 4: Format & Standards Converters; GROUP 5: Range Extenders &
Repeaters; GROUP 6: Specialty AV Products; GROUP 7: Scalers; GROUP 8: Cables and
Connectors; GROUP 9: Room Connectivity; GROUP 10: Mounting and Rack Adapters;
GROUP 11: Sierra Video; GROUP 12: Digital Signage; GROUP 13: Audio; GROUP 14:
Collaboration; and GROUP 15: KM & KVM Switches.
Getting Started
We recommend that you:
•Unpack the equipment carefully and save the original box and packaging materials for
possible future shipment.
•Review the contents of this user manual.
Go to www.kramerav.com/downloads/PA-50HZ to check for up-to-date user manuals, application
programs, and firmware upgrades (where appropriate).
Achieving the Best Performance
•Use only good quality connection cables (we recommend Kramer high-performance,
high-resolution cables) to avoid interference, deterioration in signal quality due to poor
matching, and elevated noise levels (often associated with low quality cables).
•Do not secure the cables in tight bundles or roll the slack into tight coils.
•Avoid interference from neighboring electrical appliances that may adversely influence
signal quality.
•Position your Kramer PA-50HZ away from moisture, excessive sunlight and dust.
This equipment is to be used only inside a building. It may only be connected to other
equipment that is installed inside a building.
Safety Instructions
Caution:
There are no operator serviceable parts inside the unit.
Warning:
Use only the power cord that is supplied with the unit.
Warning:
Do not open the unit. High voltages can cause electrical shock! Servicing by qualified
personnel only.
Warning:
Disconnect the power and unplug the unit from the wall before installing.

Kramer Electronics Ltd.
PA-50HZ –Introduction
2
Recycling Kramer Products
The Waste Electrical and Electronic Equipment (WEEE) Directive 2002/96/EC aims to reduce
the amount of WEEE sent for disposal to landfill or incineration by requiring it to be collected
and recycled. To comply with the WEEE Directive, Kramer Electronics has made
arrangements with the European Advanced Recycling Network (EARN) and will cover any
costs of treatment, recycling and recovery of waste Kramer Electronics branded equipment on
arrival at the EARN facility. For details of Kramer’s recycling arrangements in your particular
country go to our recycling pages at www.kramerav.com/support/recycling.
Overview
Congratulations on purchasing your Kramer PA-50HZ 50W Power Amplifier
PA-50HZ is a compact Hi-Z (70V/100V) power amplifier with line-level output, ideal for small
to medium-size meeting spaces and classrooms.
•Simple and flexible speaker array installation.
•Line level output for cascading, recording or conferencing scenarios.
•Small form factor and convection cooling for simple installation.
•50W of power into a 70V or 100V line.
•Over-current, and over-heat protection –The PROTECT LED lights, and the device shuts
down until correct operational conditions are regained.
Typical Applications
The PA-50HZ is ideal for the following typical applications:
•Small to medium-size meeting spaces.
•Lecture halls.
•Multipurpose rooms.
•City halls and courtrooms.
•Retail stores.

Kramer Electronics Ltd.
PA-50HZ –Defining the PA-50HZ
3
Defining the PA-50HZ
This section defines the PA-50HZ.
Figure 1: PA-50HZ Front and Back Panel
#
Feature
Function
ON LED
Lights green when powered on.
PROTECT LED
Lights red in case of over-current / over-heat.
The device powers down until operational conditions
are corrected and automatically powers up.
INPUT 5-pin Terminal Block
Connector
Connect to a line-level, balanced, stereo audio
source.
VOLUME Attenuator
Volume for speaker output.
LINE OUT 5-pin Terminal Block
Connector
Connect to a balanced, stereo audio acceptor (for
example, amplified speakers).
Hi-Z OUT 3-pin Large Terminal
Block Connectors
Connect Hi-Z (70V or 100V) and COM to mono Hi-Z
speakers.
Speaker can output a mono signal.
48V DC Power Terminal Block
Connector
Connect to the Kramer power adapter.

Kramer Electronics Ltd.
PA-50HZ –Connecting the PA-50HZ
4
Connecting the PA-50HZ
Always switch off the power to each device before connecting it to your PA-50HZ. After
connecting your PA-50HZ, connect its power and then switch on the power to each device.
Figure 2: Connecting the PA-50HZ
To connect the PA-50HZ as illustrated in the example in Figure 2:
1. Connect the audio source (for example, a balanced stereo audio source, such as the
Kramer VS-88UHDA matrix switcher) to the INPUT 5 pin terminal block connector .
2. Connect the LINE OUT 5 pin terminal block connector to a balanced stereo input (for
example, an additional PA-50HZ device).
3. Connect the Hi-Z OUT 3-pin large terminal block connectors (70V and COM) to the +
and –terminals of a passive speaker (for example, the Galil 8-C ceiling speakers, daisy
chained). The speakers will output the audio after summing the stereo signal to a mono
signal.
Do not ground the loudspeakers.
4. Connect the power cord (not shown).

Kramer Electronics Ltd.
PA-50HZ –Connecting the PA-50HZ
5
Connecting the Output to a Balanced/Unbalanced
Stereo Audio Acceptor
The following are the pinouts for connecting the output to a balanced or unbalanced stereo
audio acceptor:
Figure 3: Connecting to a Balanced Stereo Audio
Acceptor
Figure 4: Connecting to an Unbalanced Stereo Audio
Acceptor
Connecting a Balanced/Unbalanced Stereo Audio
Source to the Balanced Input
The following are the pinouts for connecting a balanced or unbalanced stereo audio source to
the balanced input:
Figure 5: Connecting a Balanced Stereo Audio
Source to the Balanced Input
Figure 6: Connecting an Unbalanced Stereo Audio
Source to the Balanced Input
Adjusting the Master Volume
Use the VOLUME Attenuator on the rear panel to set the maximum level for the speaker
output.

Kramer Electronics Ltd.
PA-50HZ –Technical Specifications
6
Technical Specifications
Inputs
1 Stereo Balanced Audio
On a 5-pin terminal block (up to +4dBu/10kΩ)
Outputs
1 Stereo Balanced Line
Level
On a 5-pin terminal block connector (up to
+4dBu/600Ω)
1 Mono Speaker
On a 3-pin large terminal block
Input Sensitivity
Full power @1.5V (+5dBV)
Amplifier
Class
D
Output Power
1 x 50W @ 70V or 100V
Maximum Voltage Gain
37dB BTL
Dynamic Range
>120dB
Frequency Response
Speaker output 50Hz to 20kHz @ +/–3dB
Frequency Response
Line level output 20Hz to 20kHz @ +/–0.3dB
S/N Ratio
90dB, 20 Hz –20 kHz
Audio THD + Noise
Speaker output THD+N (1kHz @ 1W) 0.01 %
Audio 2nd Harmonic
0.00006%
Controls
Screw trimmer input volume attenuator
Power
Consumption
48V DC, 1.2A
Source
48V DC, 1.36A
Environmental Conditions
Operating Temperature
0° to +40°C (32° to 104°F)
Storage Temperature
–40° to +70°C (–40° to 158°F)
Humidity
10% to 90%, RHL non-condensing
Regulatory Compliance
(Standards Compliance)
Safety
CE, UL
Environmental
RoHs, WEEE
Enclosure
Size
1/4 19” 1U
Type
Aluminum
Cooling
Convection ventilation
Accessories
Included
Power adapter, power cord
Specifications are subject to change without notice at www.kramerav.com

The warranty obligations of Kramer Electronics Inc. (“Kramer Electronics”) for this product are limited to the terms set forth below:
What is Covered
This limited warranty covers defects in materials and workmanship in this product.
What is Not Covered
This limited warranty does not cover any damage, deterioration or malfunction resulting from any alteration, modification, improper or unreasonable use
or maintenance, misuse, abuse, accident, neglect, exposure to excess moisture, fire, improper packing and shipping (such claims must be presented to
the carrier), lightning, power surges, or other acts of nature. This limited warranty does not cover any damage, deterioration or malfunction resulting
from the installation or removal of this product from any installation, any unauthorized tampering with this product, any repairs attempted by anyone
unauthorized by Kramer Electronics to make such repairs, or any other cause which does not relate directly to a defect in materials and/or workmanship
of this product. This limited warranty does not cover cartons, equipment enclosures, cables or accessories used in conjunction with this product.
Without limiting any other exclusion herein, Kramer Electronics does not warrant that the product covered hereby, including, without limitation, the
technology and/or integrated circuit(s) included in the product, will not become obsolete or that such items are or will remain compatible with any other
product or technology with which the product may be used.
How Long this Coverage Lasts
The standard limited warranty for Kramer products is seven (7) years from the date of original purchase, with the following exceptions:
1. All Kramer VIA hardware products are covered by a standard three (3) year warranty for the VIA hardware and a standard three (3) year
warranty for firmware and software updates.
2. All Kramer fiber optic cables, adapter-size fiber optic extenders, active cables, cable retractors, all Kramer speakers and Kramer touch panels
are covered by a standard one (1) year warranty.
3. All Kramer Cobra products, all Kramer Calibre products, all Kramer Minicom digital signage products, all HighSecLabs products, all
streaming, and all wireless products are covered by a standard three (3) year warranty.
4. All Sierra Video MultiViewers are covered by a standard five (5) year warranty.
5. Sierra switchers & control panels are covered by a standard seven (7) year warranty (excluding power supplies and fans that are covered for
three (3) years).
6. K-Touch software is covered by a standard one (1) year warranty for software updates.
7. All Kramer passive cables are covered by a ten (10) year warranty.
Who is Covered
Only the original purchaser of this product is covered under this limited warranty. This limited warranty is not transferable to subsequent purchasers or
owners of this product.
What Kramer Electronics Will Do
Kramer Electronics will, at its sole option, provide one of the following three remedies to whatever extent it shall deem necessary to satisfy a proper
claim under this limited warranty:
1. Elect to repair or facilitate the repair of any defective parts within a reasonable period of time, free of any charge for the necessary parts and
labor to complete the repair and restore this product to its proper operating condition. Kramer Electronics will also pay the shipping costs
necessary to return this product once the repair is complete.
2. Replace this product with a direct replacement or with a similar product deemed by Kramer Electronics to perform substantially the same
function as the original product.
3. Issue a refund of the original purchase price less depreciation to be determined based on the age of the product at the time remedy is sought
under this limited warranty.
What Kramer Electronics Will Not Do Under This Limited Warranty
If this product is returned to Kramer Electronics or the authorized dealer from which it was purchased or any other party authorized to repair Kramer
Electronics products, this product must be insured during shipment, with the insurance and shipping charges prepaid by you. If this product is returned
uninsured, you assume all risks of loss or damage during shipment. Kramer Electronics will not be responsible for any costs related to the removal or re-
installation of this product from or into any installation. Kramer Electronics will not be responsible for any costs related to any setting up this product, any
adjustment of user controls or any programming required for a specific installation of this product.
How to Obtain a Remedy Under This Limited Warranty
To obtain a remedy under this limited warranty, you must contact either the authorized Kramer Electronics reseller from whom you purchased this
product or the Kramer Electronics office nearest you. For a list of authorized Kramer Electronics resellers and/or Kramer Electronics authorized service
providers, visit our web site at www.kramerav.com or contact the Kramer Electronics office nearest you.
In order to pursue any remedy under this limited warranty, you must possess an original, dated receipt as proof of purchase from an authorized Kramer
Electronics reseller. If this product is returned under this limited warranty, a return authorization number, obtained from Kramer Electronics, will be
required (RMA number). You may also be directed to an authorized reseller or a person authorized by Kramer Electronics to repair the product.
If it is decided that this product should be returned directly to Kramer Electronics, this product should be properly packed, preferably in the original
carton, for shipping. Cartons not bearing a return authorization number will be refused.
Limitation of Liability
THE MAXIMUM LIABILITY OF KRAMER ELECTRONICS UNDER THIS LIMITED WARRANTY SHALL NOT EXCEED THE ACTUAL PURCHASE PRICE PAID
FOR THE PRODUCT. TO THE MAXIMUM EXTENT PERMITTED BY LAW, KRAMER ELECTRONICS IS NOT RESPONSIBLE FOR DIRECT, SPECIAL,
INCIDENTAL OR CONSEQUENTIAL DAMAGES RESULTING FROM ANY BREACH OF WARRANTY OR CONDITION, OR UNDER ANY OTHER LEGAL
THEORY. Some countries, districts or states do not allow the exclusion or limitation of relief, special, incidental, consequential or indirect damages, or
the limitation of liability to specified amounts, so the above limitations or exclusions may not apply to you.
Exclusive Remedy
TO THE MAXIMUM EXTENT PERMITTED BY LAW, THIS LIMITED WARRANTY AND THE REMEDIES SET FORTH ABOVE ARE EXCLUSIVE AND IN LIEU OF
ALL OTHER WARRANTIES, REMEDIES AND CONDITIONS, WHETHER ORAL OR WRITTEN, EXPRESS OR IMPLIED. TO THE MAXIMUM EXTENT
PERMITTED BY LAW, KRAMER ELECTRONICS SPECIFICALLY DISCLAIMS ANY AND ALL IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION,
WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IF KRAMER ELECTRONICS CANNOT LAWFULLY DISCLAIM OR
EXCLUDE IMPLIED WARRANTIES UNDER APPLICABLE LAW, THEN ALL IMPLIED WARRANTIES COVERING THIS PRODUCT, INCLUDING WARRANTIES
OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE, SHALL APPLY TO THIS PRODUCT AS PROVIDED UNDER APPLICABLE LAW.
IF ANY PRODUCT TO WHICH THIS LIMITED WARRANTY APPLIES IS A “CONSUMER PRODUCT” UNDER THE MAGNUSON-MOSS WARRANTY ACT (15
U.S.C.A. §2301, ET SEQ.) OR OTHER APPLICABLE LAW, THE FOREGOING DISCLAIMER OF IMPLIED WARRANTIES SHALL NOT APPLY TO YOU, AND
ALL IMPLIED WARRANTIES ON THIS PRODUCT, INCLUDING WARRANTIES OF MERCHANTABILITY AND FITNESS FOR THE PARTICULAR PURPOSE,
SHALL APPLY AS PROVIDED UNDER APPLICABLE LAW.
Other Conditions
This limited warranty gives you specific legal rights, and you may have other rights which vary from country to country or state to state.
This limited warranty is void if (i) the label bearing the serial number of this product has been removed or defaced, (ii) the product is not distributed by
Kramer Electronics or (iii) this product is not purchased from an authorized Kramer Electronics reseller. If you are unsure whether a reseller is an
authorized Kramer Electronics reseller, visit our web site at www.kramerav.com or contact a Kramer Electronics office from the list at the end of this
document.
Your rights under this limited warranty are not diminished if you do not complete and return the product registration form or complete and submit the
online product registration form. Kramer Electronics thanks you for purchasing a Kramer Electronics product. We hope it will give you years of
satisfaction.

www.KramerAV.com
[e-mail]
P/N:
2900-301013
Rev:
1
SAFETY WARNING
Disconnect the unit from the power supply before opening andservicing
For the latest information on our products and a list of Kramer distributors, visit our Web site where
updates to this user manual may be found.
We welcome your questions, comments, and feedback.