Klein + Hummel O 200 Owner's manual

Active
Studio Monitor
Installation
and
Operation
O 200
KLEIN + HUMMEL GmbH
Zeppelinstr. 12 73760 Ostfildern/Germany
Tel.: + 49 - (0)711 - 45893 - 0
Fax: + 49 - (0)711 - 45893 - 35
e-Mail:[email protected]
Internet:www.klein-hummel.de
058-E0011
Version 01/2003

Page2 Active Studio Monitor O 200
Safety Instructions
It is absolutely essential that you read these safety instructions carefully before connecting and using this K+H
product. Your safety depends on it. Furthermore, failure to follow these instructions voids the warranty. Toensure
safe operation for years to come, keep these instructions in a safe place for future reference. K+H has manufactured
this product in accordance with IEC 1992 (SEC) 39 standards, then tested and delivered it in safe operating condition.
To maintain it in this condition, you must:
•observe all safety instructions,
•use the product only as described herein,
•have any maintenance, repairs, or modifications performed only by K+H or other authorized personnel, and
•ensure that the room in which you use this product is wired in accordance with the local electrical code.
Warning!
•When the interior of the cabinet is exposed, touching some parts can lead to an electric shock.
•If you need to gain access to the interior electronics of the unit, always disconnect the unit from any and all power
sources first.
•Any repairs, maintenance, or other service of the unit when its interior compartment is exposed may only be
performed safely (in accordance with VBG 4) by authorized technicians familiar with all the risks
involved. Even in an unplugged state, a fully charged capacitor in the unit can zap the
unsuspecting.
•Loudspeaker output jacks labeled with the IEC 417/5036 emblem (Fig. A, right) may be carrying
dangerously high voltages. If your unit has this emblem, ensure that any connections to be
made between these jacks and the speakers themselves are made before powering up the
unit, and are done so only with manufacturer-approved interconnecting cables.
•If you need to replace any fuses, ensure that the replacements are of exactly the same type,
value and voltage as the originals, as spelled out in the technical specifications at the rear of
this manual.
•Do not use "repaired" fuses.
•If you do not have any fuses on hand of the specified size, type, and value, do not hot-wire the
contacts in the holder by short-circuiting them.
•Certain areas of the cabinet, cover, and rear panel can achieve extreme temperatures and are
therefore marked with a "HOT" label (Fig. B). Refrain from touching any heat sink or ventilation
grille.
•High volume levels are known to cause permanent - i.e. irreversible - hearing damage, especially
when listened to without sufficient breaks. The higher the levels, the more frequent and exten-
ded must be the breaks. Avoid standing too close to loudspeakers that are being driven at high
levels. If you must be exposed to high sound pressure levels over an extended period of time,
use hearing protection.
MainsConnection:
•This unit is designed for continuous operation.
•Ensure that the operating voltage of the unit matches that of the local mains current (AC line voltage).
•Always check before connecting the power cable to the mains socket that the power switch on the unit itself is set
tooff("O").
•Use the power cable or power supply that came with the unit to connect to the mains socket (wall outlet).
•Power supply: a damaged power cable may not be repaired. Use a new cable.
•Avoid plugging the mains cable into a power strip that already has several other power-consuming devices
connected to it.
•Avoid using extension cables. The unit must be connected to a mains socket close to it, and that socket should
be freely accessible.
Installation:
•This product may only be placed on a stable, clean, horizontal surface.
•Do not expose this product to vibration.
•Do not operate this product anywhere near water or other liquids. Do not use it near a sink, swimming pool,
bathtub, or in any damp room or area. Electrical shocks carried through water can kill. Do not place any beverages
whatsoever on or near this product, as liquids can kill electronic components.
•Ensure sufficient ventilation around the product to allow for adequate heat dissipation, especially near the rear
panel and the sides of the cabinet (minimum of 8 inches from the nearest wall). The unit may only be installed in
a rack if measures are taken to ensure sufficient ventilation and if the mounting instructions of the manufacturer
are followed. Do not block or cover any heat sink, fan, or vent.
•Do not place the product where it will be in the path of direct sunlight, and keep it a safe distance away from
radiators and other heaters of any kind.
•If you bring this product from a cold environment into a warm one (such as from a vehicle into a studio), it is quite
possible that condensation will form inside the cabinet. Please allow the unit sufficient time for acclimatisation
to room temperature (minimum thirty minutes) before connecting and powering up.
•Toavoidaccidents,donotuseany accessory equipment withthisproductwhich is not approvedbythe manufacturer,
particularly mounting accessories. Do not place this unit on any unstable platform, cart, stand or table. Should the
unit fall, it can cause bodily injury to persons, or can be damaged itself.
•To protect this product from lightning damage during a thunderstorm or from power surges during an extended
absence, disconnect the power cable from the wall outlet.
Fig. A
Fig.B

Active Studio Monitor O 200 Page3
Active Studio Monitor
KLEIN + HUMMEL O 200
Installation - Operation
Figure 1:Front view of the O 200 Figure2: Rearpanel ofthe O200
Table of Contents:
Safety Instructions........................2
Front- and rear views, table of
contents ....................................3
1. Installation and Operation .......4
1.1 Operating conditions...................... 4
1.2 Speaker placement........................ 4
1.3 Mains Connection.......................... 4
1.4 MAINS Switch (POWER) ............... 4
1.5 Mains FUSE .................................. 4
1.6 INPUT, EQUALIZATION, GROUND
LIFT ............................................... 4
1.6.1 Input SENSIVITY, ATTENUATOR..4
1.6.2 Location EQUALIZATION ..............4
1.6.3 GROUND LIFT..............................5
1.7 Front grille ...................................... 5
1.8 Display functions............................ 5
1.9 Care of the cabinet......................... 5
2. Diagrams ..................................5
3. Warranty Information................7
4. Technical Specif ications..........8

Page4 Active Studio Monitor O 200
1. Installation and Operation
Itisabsolutelyessentialthatyoureadandobserve
theSafety Instructionsonpage 2beforeconnecting
or using this device.
1.1 Operating conditions
TheK+HmodelO200activestudiomonitorisintended
for use over a range of ambient temperatures from
+10°Cto+40° C(+50° Fto+104°F).Duringtransport
orstorage, temperaturesfrom -25°C to +70° C (-13°
F to 158° F) are permissible.
1.2 Speaker placement
The loudspeaker chassis used in the O 200 are
magnetically shielded, so you are free to set the
speakersrightnextto a videomonitorwithoutneeding
to worry about adversely affecting the screen.
Furthermore, the baffle of the O 200 is designed in
such a way as to disperse the sound very evenly not
just on axis but over quite a wide listening area. Any
engineer who has sat at a console for any length of
time will appreciate the considerable freedom of
movement afforded by the O 200. The cabinet is
normallydesignedto beused inthe verticalposition,
notonlyfor acousticreasonsbutalso forbestcooling.
On the left and right sides of the cabinet you will find
threaded bushings of 8 mm diameter to which the
K+H - bracket LH 26 can be attached. As an alterna-
tive, you can use the LH 28 stand-mount adapter in
combination with LH 26 to set the speaker on a
standard35-mm(1-3/8”) tripodortheLH 29(+LH 26)
TV spigot.
Please make certain that the two threaded openings
are always sealed, either with the plastic plugs that
come standard with the cabinets or with the screws
holdingthemounting adapterinplace. Otherwise you
may experience some air noise and possibly some
degradation in low-frequency response. The same
happensif theplasticplugs ontherear side,covering
theopenings for service, are removed.
1.3 Mains Connection
The amplifier electronics of the standard European
model are set up for an AC line voltage of 230 volts,
50 or 60 Hz.Export versions with other voltages are
also available. If the power plug of the mains cable
should ever need to be replaced, ensure that the
connection to the protective earth is maintained.
1.4 Mains Switch (POWER)
Whenyouswitchon power totheunit,thereis a three-
second delay before the amplified signal is sent to
thedrivers.Thisdelayavoidstheloudpopping sounds
thatotherwisemay begeneratedby devicesearlierin
the signal chain as power reaches them.You will find
thisarrangementparticularlyusefulif your studio uses
amasterswitchtopowerup allthe equipmentatonce.
When power on the O 200 is turned off, on the other
hand, or if there is a general power failure, the signal
flowto thespeaker isimmediately cutoff, preventing
any loud pops.
1.5 Mains FUSE
Whenreplacingthe fuse, firstdisconnectthe mains
cable andensure thatthenew fuseisof thefollowing
type only:
for 230 V AC 1 A Slo-Blo (5 x 20 mm)
for 117 V AC 2 A Slo-Blo (5 x 20 mm)
for 100 V AC 2.5 A Slo-Blo (5 x 20 mm)
1.6 INPUT,EQUALIZATION,GROUND LIFT
The sensitivity of the transformer balanced and
floating input is rated at +6 dBu (1.55 volts). The
three - pole female XLR jack is wired in the
standard manner (pin 1 = ground, pin 2 = +,
pin 3 = negative). If you are connecting unbalanced
sources,youwillneed to solderabridgebetweenpins
1 and 3:
unbalanced balanced
as seen from solder terminals of male XLR
Figure 3: Pin layout of input connector
Next to the input connector the level controls, the
location equalizer and the ground - lift switch are to
befound. Foravoidingunwanted setting,acover has
to be removed first.
1.6.1 Input SENSIVITY, ATTENUATOR
NeartheAF-input-socketthereareacontinuously
variable attenuator 0...-24 db and a switch for
selecting 0 dBu (0.775 V) or +6 dBu (1.55 V)
sensivity.
1.6.2 Location EQUALIZATION
Afour positionrecessed rotaryswitch (adjustable
with a screwdriver) is available for frequency
compensation due to speaker placement. For
equalizinganomaliesin thelowerfrequenciesdue
to proximity to room boundaries:
Position 0 = free space
Position-2.5 = 1boundary (wall)
Position-5 = 2boundaries(corner)
Position-7.5 = 3boundaries (corner+ ceiling)

Active Studio Monitor O 200 Page5
1.6.3 GROUND LIFT
Since the input is balanced, you should rarely
experience any hum. In unusual cases, or if the
source is unbalanced, it may be necessary to se-
paratethe connectionbetween signal groundand
chassis ground, in which case you will find this
little switch convenient. The chassis ground
remains always connected to the protective earth
conductor of the mains cable.
Warning!
Theprotective earthconductormust never
beinterruptedevenfortestpurposes!This
may be dangerous to Life!
Pleasemakecertainthatthecoverisreinstalled
after finishing the adjustments otherwise you
may experience some air noise and possibly
some degradation in low-frequency response.
1.7 Front grille
To protect the drivers from physical harm, the
O 200 comes with a sturdy plastic - coated metall
grille mounted on the front baffle. The grille can be
removed easily without tools. The acousticall effect
on the speakers is minimal and can only be detected
at all with test equipment.
!
1.8 Display functions
Two LEDs on the front next to the HF - Driver are
indicating the following states:
If the green LED (ON) is lighting, internal power
supplyis correct, normaloperation.
The red LED (OVL) indicates that the overload-
protection circuitry has been triggered, as may
happenwhilecuingupatapedeckorwhilerunning
sine wave signals through the speakers for
measurementpurposes.Output powerisreduced
to a level that takes the speakers out of danger.If
this happens, you must search for the cause and
possiblyreduce the monitoringlevel.
1.9 Care of the cabinet
The cabinet housing of the K+H O 200 active studio
monitor comes standard with a charcoal - grey (RAL
color7021)colored enamelfinish.Handlethe cabinet
with care to avoid damaging the finish.To clean the
cabinet, use a soft cloth with a mild cleaning agent
only. Under no circumstances should you use
alcohol- basedorchemical agents,nor anycleaners
with abrasive action.
2. Diagrams
The outstanding acoustic impression made by the
O 200 is confirmed by measurements using today’s mostcriticaltest methods.The test plots shownhere
andonthenextseveralpagesarebutasmallsampling
ofthese measurements.
Figure4: HorizontalDirectivity

Page6 Active Studio Monitor O 200
Figure 5:Vertical Directivity
Figure6:FrequencyResponse(freefield)
Figure7:THD,2nd and3rdorder distortion
@ 95 dB/SPL and 1 m distance
Figure8:Group Delay

Active Studio Monitor O 200 Page7
Figure10: CumulativeSpectral DecayPlot
Themonitorscumulativespectral decayplotindicates
a very clean decay without any major resonances or
standingwaves beingevident.
Figure9: Location equalization
3. Warranty Information
AllK+H productsundergo anextensive procedureof
qualitycontroltestingbeforeleavingthefactory.Before
semiconductorsaremountedonthecircuitboard,they
are subject to rigorous tests. Every single unit is
guaranteedtomatchits technicalspecificationswithin
strictpredetermined tolerances.
Pleasestore theoriginalcarton ina safe,dry place.If
youshould ever needwarranty service, putthe unit in
its original packing material and carton together with
a detailed description of the problem, and ship it
(freightprepaid) to our distributor ordirectly to:
KLEIN + HUMMEL GmbH
Customerservice
Zeppelinstrasse12
73760Ostfildern /Germany
K+Hwarrants,thattheproductisfreefromanydefects
in both material and manufacturing and that it meets
the specifications. A warranty case can only be
acknowledged under condition that the complaint is
filedto ourdistributoror tous inwritingwithin 8 days
after delivery or detection of the fault. Not covered
under this warranty are damages due to inexpert
packing and shipment, wear and tear, improper
handling,installation, operation andmaintenance.
Thelimitation periodfor warrantyclaims isdescribed
in the terms and conditions of K+H GmbH. Its our
choicetorepair,tosupplya newproductortowithdraw
fromthe contract.
Intheevent warranty serviceisrequired,presentation
of a warranty card will not be necessary. Proof of
purchase date can be made by filing copies of
appropriatedocuments (invoice,delivery note).
Figure 11: Max. SPL @ 1m

Page8 Active Studio Monitor O 200
4. Technical Specifications O 200
Free field frequency response 60 Hz - 20 kHz ± 2 dB
50 Hz - 24 kHz ± 3 dB
Self generated noise level at 10 cm < 20 dB(A)
Total Harmonic Distortion
125 Hz and above @ 1 m < 0.5 % @ 95 dB/SPL
Maximum SPL
in half space, 3%THD at 1 m distance 110dB/SPL
averagedbetween 100 Hz and 6 kHz
Electronics
Poweramplifiers
Bass amplifier 50W at 8 Ohm (THD < 0.1 %)
Trebleamplifier 50W at 6 Ohm (THD < 0.1 %)
Crossoversection
Crossoverfrequency 2.5 kHz
Crossoverslopes 24 dB / octave
Subsonic filter 40 Hz, 18 dB/octave
Protection circuit againstoverload ofboth drivers
Input Impedance 14 kOhm (transformerbalancedfloating)
Sensitivity + 6 dBu, switchable to 0 dBu
Volume control continuously variable from 0...-24 dB
Commonmode rejectionratio > 60 dB @ 15 kHz
Equalization
4 position switch positioning on rear/side walls 0; -2.5;-5; -7.5dB
Drivers magneticallayshielded
Bass 6.5”(170mm) Ø,PolypropyleneDiaphragm
Treble 1”(25mm) Ø,TitaniumFabric DomeTweeter
Connectors Mains 3- terminalEuro connector
Signalinput XLR connector3-pinfemale
Power consumtion
Idle 15 VA
Fullpower 120VA
Mains 230V AC, 50/60 Hz, other voltages on request
Dimensions (W x H x D) 207 x 325 x 250 mm
Volume 11.4 liters
Weight 10 kg
Cabinet finish enamelcharcoal -grey RAL7021
Accessories LH26 mountingbracket
LH28tripodbushing(LH26mountingbracketrequired)
LH 29TV - spigot (LH 26 mounting bracket required)
LH27ballclampmount(LH26mountingbracketrequired)
C15 eyebolt