KH 750 DSP | 7
Preparing the room
X
Arrange all acoustically relevant surfaces and objects symmetrically on either side of the
listening axis of the room (left/right).
XMinimize the sound that is reflected back to the listening position by using angled surfaces
and/or acoustical treatment.
X
The subwoofer can delivery very low frequencies at high levels which can lead to objects and
parts of the room structure to rattle. Ensure that rattling and resonating surfaces are avoided.
This product has been optimized for use in recording studios. In order to avoid aecting
the quality of reproduction, make sure that the product is used in an EMC environment.
Setting up the subwoofers
Choosing the type of setup
The driver is located on the front panel of the subwoofer, allowing the subwoofer to be either
set up in a room or flush mounted into a wall recess.
Flush mounting the subwoofer into a wall recess or placing it directly against the wall oers
the following advantages:
• A solid wall boosts the level of the subwoofer in the room which can be compensated by
reducing the output level of the subwoofer. This also reduces distortion resulting in a cleaner
sound reproduction.
• Reflections from the wall behind the subwoofer are eliminated so that the frequency
response becomes smoother.
• The subwoofer does not occupy space in the room when flush mounted.
If you want to flush mount the subwoofer into a wall recess:
X
Have the wall constructed by an experienced acoustical engineer. At least the following points
should be observed:
• The wall should be solid (stone, brick, concrete, several layers of gypsum or MDF).
• Ensure a free air flow around the rear of the subwoofer.
Using one or several subwoofers
XUse ...
one subwoofer several subwoofers
... if your room does not oer sucient
space for several subwoofers.
... if you need to move left and right
along the mixing console, or if there are
several listening positions along a large
format mixing console.
... if you require a higher output power
or less distortion with the same output
power.
... to suppress lateral modes or cross
modes in the room by means of a Plane
Wave Bass Array (PWBA™).
... if many smaller cabinets are easier to
position than one large cabinet.
To reduce low-frequency distortion, the uncalibrated output level of your subwoofer
should always be higher than the output level of your loudspeakers. We recommend
using arrays with several subwoofers, in which case the uncalibrated maximum output
level of the subwoofer array should also be higher than the maximum output level of all
the loudspeakers in the system. The subwoofers can then be calibrated to a lower output
level resulting in lower distortion and correspondingly cleaner low-frequency
reproduction.
For information on building a balanced system, please refer to the “Product Selection
Guide” at www.neumann.com.
The Neumann.Control software must be used to set up multiple subwoofer systems.
