Kramer Electronics, Ltd.
Preliminary
USER MANUAL
Model:
900N
Power Amplif i er
Contents
i
Contents
1 Introduction 1
2 Getting Started 1
2.1 Quick Start 2
3 Overview 3
4 Your 900N Power Amplifier 4
5 Connecting your 900N Power Amplifier 5
6 Technical Specifications 6
Figures
Figure 1: 900N Pow e r Am pli fier 4
Figure 2: Connecting the 900N Power Amplifier 5
Tables
Table 1: Features and Functions of the 900N Power Amplifier 4
Table 2: Technical Specifications of the 900N Power Amplifier 6
Introduction
1
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 o f our line, making the best even better! Our
1,000-plus different models now appear in 11 groups
defined b y function.
1
that are clearly
Thank you for purchasing the Kramer 900N
Power Amplifier. This product
is ideal for:
• Presentation rooms and multimedia a pplications for quick, local
audio amplification
• Personal audio listening (for example, a PC and portable CD
player)
The package includes the following items:
• 900N Power Amplifier
• Power adapter (12V DC Input)
2
• This user ma nual
2 Getting Started
We recommend that you:
• Unpack the e quipment carefully and save the original b ox and
packaging materials for possible future shipment
• Review the contents of this user manual
• Use Kramer high-performance high-resolution cables
3
1 GROUP 1: Distribution Amplifiers; GROUP 2: Switchers and Matrix Switchers; GROUP 3: Control Systems;
GROUP 4: Format/Standards Converters; GROUP 5: Range Extenders and Repeaters; GROUP 6: Specialty AV Products;
GROUP 7: Scan Converters and Scalers; GROUP 8: Cables and Connectors; GROUP 9: Room Connectivity;
GROUP 10: Accessories and Rack Adapters; GROUP 11: Sierra Products
2 Download up-to-date Kramer user manuals from the Internet at this URL: http://www.kramerelectronics.com
3 The complete list of Kramer cables is on our Web site at http://www.kramerelectronics.com
KRAMER: SIMPLE CREATIVE TECHNOLOGY
Getting Started
2
2.1 Quick Start
This quick start chart summarizes the basic setup and operation steps.
3
3 Overview
Overview
The Kramer 900N is a high performance power amplifier that can accept a
balanced stereo audio input on a 5-pin terminal block connector, or
unbalanced stereo audio input on two RCA connectors.
The balanced and unbalanced stereo audio inputs are converted to a
differential stereo audio output for speakers on a 4-pin terminal block
connector.
The 900N Power Amplifier includes:
• An audio level knob to adjust the audio level output
• An ON LED indicating the unit is powered up
• A 12V power source making it ideal even for field operation
• An easy-to-connect detachable terminal block connector
The 900N Power Amplifier is house d i n a Kramer TOOLS enclosure.
To achieve the best performance:
2
• Use only good quality connection cables
to avoid interference,
deterioration in signal quality due to poor matching, and elevated
noise levels (often associated with low quality cables).
• Avoid interference from neighboring electrical appliances that
may adverse ly influence signal quality and position your Kramer
900N away from moi s ture, exc essive sunl ight and dust
Caution – No operator-serviceable parts inside unit.
Warning – U se only the Kramer Electronics input power
wall adapter that is provided with t his unit
Warning – Disconnect power and unplu g unit from wall
3
.
before insta lling or removing device or ser vi cing unit.
1
an
1 Both inputs cannot be connected simultaneously
2 Available from Kramer Electronics on our Web site at http://www.kramerelectronics.com
3 For example, part number 22535-000251
KRAMER: SIMPLE CREATIVE TECHNOLOGY
Your 900N Power Amplifier
4
#
Feature
Function
1
INPUTS
LEFT RCA Connector
Connects the unbalanced stereo audio input to the audio source1
2
RIGHT RCA Connector
4
SPKR OUT (L+L-R+R-)
Terminal Block Connector
Connects to a pair of loudspeakers
5
12V DC
+12V DC connector for powering the unit
6
VOLUME Control Knob
Adjusts the output signal level
7
ON LED
Illuminates when receiving power
4 Your 900N Power Amplifier
Figure 1 and Table 1 define the 900N Power Amplifier.
Figure 1: 900N Power Amplifier
Table 1: Features and Functions of the 900N Power Amplifier
3 (L+L- G R+R-) Terminal
Block Connector
Connects the balanced stereo au dio i n put to the au di o sou rc e1
1 Either the RCA (unbalanced) input or the terminal block (balanced) input may be connected. You cannot connect both
simultaneously
Connecting your 900N Power Amplifier
5
5 Connecting your 900N Power Amplifier
Connect your 900N, as the example in Figure 2 illustrates:
1. Connect an unba lan ced st ere o audio source (for ex am ple, an un bal anc ed
stereo audio player) to the LEFT and RIGHT INPUT RCA connectors
2. Connect the SPKR OUT terminal block connector to a pair of lou dspe ake rs,
by connecting the left loudspeaker to the “L+” and the “L-” terminal block
connectors, and the right loudspeaker to the “R+” and the “R-” terminal
block connectors. Do not ground the loudspeakers.
3. Connect the 12V DC power adapter to the power socket and connect the
adapter to the mains electricity (n ot show n in this illus trat ion) .
4. Adjust the volume by turning the volume control knob.
1
.
Figure 2: Connecting the 900N Power Amplifier
1 Or alternatively, connect the balanced stereo audio source to the l eft (L+ L-) and right (R+ R-) INPUT terminal block
connectors
KRAMER: SIMPLE CREATIVE TECHNOLOGY
Technical Specifications
6
INPUTS:
1 unbalanced stereo on RCA connectors
1 balanced stereo on a 5-pin terminal block connector
OUTPUT:
1 stereo speaker out put : on a 4-pin terminal bloc k conne ct or
OUTPUT POWER:
2x10W (4Ω)
2x35W ( 4Ω)
BANDWIDTH (-3dB):
24kHz
S/N RATIO:
55dB
CONTROLS:
<–40dB to +19dB until the compression thresho ld
COUPLING:
Input: AC; speakers out: DC
AUDIO THD + NOISE:
0.5% @1kHz
AUDIO 2nd HARM ONI C:
0.04% @1kHz
POWER SOURCE:
12V DC, 2.1A
DIMENSIONS:
12 cm x 7.5 cm x 2.5 cm (4.7" x 2.95" x 0.98", W, D, H)
WEIGHT:
0.3kg (0.66lbs) approx .
ACCESSORIES:
Power supply, mounting bracket
OPTIONS:
RK-3T 19” rack adapter
6 Technical Specifications
Table 2: Technical Specifications1 of the 900N Power Amplifier
OUTPUT MUSIC POWER:
1 Specifications are subject to change without notice. Measurements are on the basis of 4Ω loads
LIMITED WARRANTY
WHO IS PROTECTED?
WHAT IS COVERED AND WHA T IS NO T COVERED
WHAT WE WILL P A Y F OR AND WHA T WE WILL N OT P A Y FOR
HOW YOU CAN GET WARRANTY SERVICE
LIMITA TION OF IMPLIED W ARRANTIES
EXCLUSION OF DAMAGES
CAUTION!
Kramer Electronics (hereafter ) warrants this product free from defects in material and workmanship under the
following terms.
Kramer
HOW LONG IS THE WARRANTY
Labor and parts are warranted for seven years from the date of the first customer purchase.
Only the first purchase customer may enforce this warranty.
W e will pa y labor a nd mat erial ex pense s for cov ered i tems. W e will n ot pay for the f ollowin g:
The liab ilit y of K ramer for an y ef fect ive p rod ucts is lim ited t o th e repa ir or r epla cem ent of the pro du ct at ou r op tion. Kram er sha ll
not be li able fo r:
This war ranty gives y ou speci fic le gal righ ts, and you ma y also ha ve oth er right s, whi ch vary from p lace to place.
All produc ts retur ned t o Kramer f or ser vice mus t have prior ap prova l. This may b e obtain ed from y our de aler .
This equ ipment h as be en teste d to det ermine compl iance w ith the require ments of:
EN-5008 1: "Electr omagnet ic co mpatibi lity ( EMC);
generic emission standard.
Residen tial, c omme rcial an d light indust ry"
EN-5008 2: "Electr omagnet ic co mpatibi lity ( EMC) gen eric i mmunity stand ard.
Part 1: R esiden tial, commer cial an d light industr y env ironment ".
CFR-47: FCC* Rules and Regulations:
Part 15: “Ra d io frequency devices
Subpart B Unintentional radiators”
Except as below, this warranty covers all defects in material or workmanship in this product. The following are not covered
by the warranty:
1. Any product which is not distributed by Kramer, or which is not purchased from an authorized Kramer dealer. If you are
uncertain as to whether a dealer is authorized, please contact Kramer at one of the agents listed in the Web site
www.kramerelectronics.com.
2. Any product, on which the serial number has been defaced, modified or removed, or on which the WARRANTY VOID
T AMP ER E D sti c ke r ha s be en torn,
3. Damage, det eriora tion o r malfun ction resulti ng fr om:
i) Accident, misuse, abuse, neglect, fire, water, l ightnin g or oth er acts of nat ure
ii) Product m odific ation , or fai lure to f ollow instru ction s suppli ed wit h the pro duct
iii) Repa ir or a ttempte d repai r by an yone no t author ized by Kramer
iv) Any ship ment of th e pro duct (cla ims mus t be pr esented to th e carrie r)
v) Removal or inst alla tion of th e pro duct
vi) Any other cause, which does not relate to a product defect
vii)Cartons, eq uipme nt encl osures , cabl es or acc essor ies used in con juncti on with the pr oduct
1. Remo val or install ations char ges.
2. Costs of initial technical adjustments (set-up), including adjustment of user controls or programming. These costs are the
respon sibili ty of th e Krame r deale r from wh om the pr oduc t was pu rchase d.
3. Shippin g char ges.
1. To obtain service on you product, you must take or ship it prepaid to any authorized Kramer service center.
2. Whenever warranty service is required, the original dated invoice (or a copy) must be presented as proof of warranty
coverage, and should be included in any shipment of the product. Please also include in any mailing a contact name,
company, address, and a description of the problem(s).
3. For the name of the nearest Kramer authorized service center, consult your authorized dealer.
All implied warranties, including warranties of merchantability and fitness for a particular purpose, are limited in duration to
the length of this warranty.
1. Damage to other p roper ty cause d by defec ts in th is prod uct, da mages ba sed upo n inconve nien ce, loss of use o f the produ ct, l oss
of time, commercial loss ; or:
2. Any ot her d ama ges, whet her inc iden tal, co nseq uen tial o r o th erwi se. Some coun tri es ma y n ot allow li mita tion s on ho w lon g a n
implied warranty lasts and/or do not allow the exclusion or limitation of incidental or consequential damages, so the above
limita tions an d excl usions m ay not a pply to you.
Servicing the machines can only be done by an authorized Kramer technician. Any user who makes changes or
modifications to the unit without the expressed approval of the manufacturer will void user authority to operate the
equipment.
Use the supplied DC powe r sup ply to fe ed pow er to the m achine .
Please use recommended interconnection cables to connect the machine to other components.
IF reattached, removed or otherwise interfered with.
* FCC and CE approv ed using S TP ca ble (for twiste d pair pr oducts)
NOTE:
Part 1:
P/N:
2900-000558
Rev:
2
For the latest information on our products and a list of Kramer
distributors, visit our Web site: www.kramerelectronics.com
where updates to this user manual may be found.
We welcome your questions, comments an d feedback.
Safety Warning:
Disconnect the unit from the power supply before
opening/servicing.
Caution
Kramer Electronics, Ltd.
Web site: www.kramerelectronics.com
E-mail: info@kramerel.com
P/N: 2900-000558 REV 2
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