System Use - Klein + Hummel O 300 Operating Manual

An M8 thread is positioned on either side of the cabinet for attaching an LH 25 "U" bracket. The plastic plugs
should be refitted if the LH 25 is later removed.
Angled metal brackets on the rear panel can be used to mount the cabinet on a wall or as handles to lift the
loudspeaker. Note: Do not place the O 300 (D) face down on a flat surface as the midrange driver will be
damaged.

System Use

Klein + Hummel loudspeakers should only be used indoors and in these ambient conditions:
•
+10° C to +40° C (+50° F to +104° F), <90% relative humidity, non-condensing
During transport or storage the ambient conditions can be:
•
-25° C to +70° C (-13° F to 158° F), <90% relative humidity, non-condensing
Before connecting the mains power cable, ensure that the correct mains voltage is indicated on the electronics
panel (230, 120, or 100 V) and that the mains power switch is off. Next connect the input signal cable (analog,
digital, or both as appropriate) and power up the loudspeaker. There will be a five second delay before sound can
be heard from the loudspeaker so as to avoid noises (pops) from preceding equipment turned on at the same
time. Conversely, turning off the loudspeaker immediately mutes the audio. The K+H logo should light up. If there
are no lights, check the mains power supply.
In a studio application, the loudspeakers should be placed according to the ITU-R BS.775-1 recommendations so
there is consistency of reproduction when compared to other listening environments. For movie applications,
ANSI/SMPTE 202M is the preferred standard for system setup. For home use, as materials are mixed in ITU style
rooms, one should get as close as possible to this configuration to maximize replay authenticity.
For two-channel stereo, ±30° should be used. There are currently no internationally agreed standards for 6.1 or
7.1 formats. However common practice is to use one or two loudspeakers in the centre back location of a 6.1
system. In a 7.1 system common practice is to place side loudspeakers at ±90° and to push the surround
loudspeakers back to ±150°.
For the best stereo imaging the loudspeakers should be placed symmetrical, in a symmetrical room, where
objects have been placed symmetrically. This ensures the same response from each loudspeaker at the listening
position and thus good imaging. Sound reflected back to the listening position should also be minimized using
surface angling or acoustical treatment. The acoustical axis should point towards the listening position or centre
of the listening area in both the horizontal and vertical planes.
Loudspeaker Name
Left
Center
Right
Left Surround
Right Surround
O 300 (D) Operating Manual
y
O 300 (D) Acoustical Axis
ITU-R BS.775-1 Angle
-30°
0°
30°
-110°±10°
110°±10°
x
ANSI/SMPTE 202M Angle
-22.5°
0°
22.5°
An array to the left
An array to the right
Klein + Hummel
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