Neumann.Berlin KH 420, Руководство по эксплуатации

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| KH 420
A Remote Electronics Kit is highly recommended to avoid heat dissipation problems and
allow easy adjustment of the controls.
X
Have the flush mounting designed by an experienced acoustic engineer. The following inst-
ructions are addressed to this experienced acoustic engineer.
X
Design the flush mounting wall‘s construction angles such that the loudspeaker’s acoustical
axis directly points horizontally and vertically towards the listening position or the centre
of the listening area.
X
Acoustically isolate the cabinet from the wall. This avoids transmission of vibrations to the
flush wall.
To avoid midrange coloration:
X
Do not put a “picture frame” around the edge of the cabinet that sticks out from the wall and
front panel. Also avoid any other acoustical discontinuities near the cabinet.
X
Compensate the acoustical loading using the recommended acoustical control settings
shown in the “Adjusting the frequency response” section on page 17. A heavier wall
provides more loading which should be compensated with more “bass” attenuation.
If the loudspeaker must be covered:
X
Use a thin open weave cloth. Two layers of very thin material will improve opacity.
Preparing the room
X
Arrange the loudspeaker setup symmetrically in the listening room.
X
Arrange all acoustically relevant surfaces and objects symmetrically on either side of the
listening axis of the room (left/right).
X
Minimize the sound that is reflected back to the listening position by using angled surfaces
and/or acoustical treatment.
This product has been optimized for use in recording studios. In order to not affect the
quality of reproduction, make sure that the product is used in an EMC (electromagneti-
cally compatible) environment.
Positioning the loudspeaker
X
Carry out the following steps very accurately, since the more accurate the physical arran-
gement of the loudspeakers in the room, the more accurate the reproduction will be at the
listening position.
X
Observe the recommended distances between the loudspeakers and your listening position
(imperial dimensions are approximate):
• Minimum: 1.25 m (4')
• Recommended: 1.5–3.0 m (5'–9')
• Maximum: 11.0 m (33')
X
Avoid positioning the loudspeaker at a distance “d
wall
” of 0.8 to 2 m (2' 6" to 6') from the
wall behind the loudspeaker.
When positioning bass managed loudspeakers:
X
Avoid a distance “d
wall
” of 0.8 to 1 m (2' 6" to 3') from a solid wall behind the loudspeaker.
Similarly, avoid these distances from solid side walls or a solid ceiling. Respecting these
positioning limitations reduces the chances of dips and peaks in the low frequency res-
ponse (comb filtering) caused by strong reflections.
Distances
EN