Klein + Hummel O 300 Installation And Operation Manual Download Page 5

Active Studio Monitor O 300 D

Page 5

1.7 LEVEL / ROOM COMPENSATION / GROUND LIFT

1.7.1 XLR INPUT
ANALOG / DIGITAL - AES/EBU

The sensitivity of the tranformer-balanced
floating input is +6 dBu (1.55 V). The three-
pin female XLR jack is wired in the standard
manner (pin 1 = ground, pin 2 = +, pin 3 = -).
If you are connecting unbalanced analog
sources, you will need to solder a bridge
between pins 1 and 3:

In digital mode, this same XLR input accepts
the digital signal according to the AES/EBU
specification (110 Ohm balanced).

1.7.2  INPUT:
DIGITAL INPUT / THROUGH

This digital input, configured as a 75-Ohm
BNC connector, is intended to receive signal

sources in S/P-DIF or AES 3id format. The
incoming digital signal line requires 

one

75 -Ohm terminator at the very end, as the
O 300 D has no internal termination.

The XLR input and the BNC input are wired
in parallel across a transformer. The fact that
the termination is wired externally allows you
to make connections in a wide variety of
ways:

1.7.2.1 Source 1x AES/EBU, monitors
connected with each other via BNC cable

To obtain an output voltage of 1 Vpp at the BNC-
output connector (with 75 - Ohm terminator),
an input voltage of 5 Vpp at the AES/EBU input
is required. This complies with the rules for
AES/EBU level. If the input level varies, the
output level does so accordingly.

2

1

Figure 2 Rear View

unbalanced                   balanced

as seen from solder terminals of male XLR

Summary of Contents for O 300

Page 1: ...Installation and Operation O 300 D KLEIN HUMMEL GmbH Zeppelinstr 12 73760 Ostfildern Germany Tel 49 0 711 45893 0 Fax 49 0 711 45893 35 e Mail info klein hummel de Internet www klein hummel de 058 E00...

Page 2: ...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 Mai...

Page 3: ...1 4MAINSConnection 4 1 5MAINSSwitch 4 1 6MAINSFuse 4 1 7 Level RoomCompensation GroundLift 5 1 7 1XLRInput 5 1 7 2BNCInput 5 1 7 3LevelATT ENUATOR 6 1 7 4 INPUT SELECTOR Switch 6 1 7 5 EQ Room Compens...

Page 4: ...r the speakers be aware that you can take advantage of the inte gral room compensating equalizer which will be described in detail in section 1 7 5 The cabinet can be mounted directly to a wall or cei...

Page 5: ...or is intended to receive signal sources in S P DIF or AES 3id format The incoming digital signal line requires one 75 Ohm terminator at the very end as the O 300 D has no internal termination The XLR...

Page 6: ...me you may connect only one type of source to the pair 1 7 5 EQ Room compensation Three 4 way recessed rotary switches adjustable with a screwdriver are available for frequency compensation due to roo...

Page 7: ...e jack labeled POWER AMP DIRECT INPUT you can feed in signals intended for the three internal power amplifiers This 7 pin female XLR jack is wired as follows Pin 1 woofer input Pin 2 woofer input Pin...

Page 8: ...on mobile use the enamel finish is preferred as it won t be subject to any extreme wear and tear Take care when handling the enamel coated cabinet not to damage the finish To clean the cabinet use a s...

Page 9: ...dispersion with a mild horn shape around the mid range dome and an elliptical horn for the tweeter Thus came to be the dispersion pattern we mentioned earlier which is narrower vertically and broader...

Page 10: ...iption of the problem and ship it freight prepaid to our distributor or directly to KLEIN HUMMEL GmbH Customer service Zeppelinstrasse 12 73760 Ostfildern Germany K H warrants that the product is free...

Page 11: ...3 3 kHz Crossover slopes 24 dB octave Room EQ Bass 0 3 6 9 dB Mid 0 2 4 6 dB High 1 0 1 2 dB Subsonic filter Cut off frequency 30 Hz Slope 6 dB octave Protection circuitry Limit against overloading of...

Page 12: ...ome tweeter Cabinet finish enamel or nylon fiber flock Cabinet color Standard version charcoal gray RAL 7021 Other colors optional Loudspeaker covering optional fine mesh metal grille Mounting options...

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