Klein + Hummel O 810, Руководство по эксплуатации

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Klein + Hummel
O 810 / O 870 Operating Manual Page 15 of 96 Version 01
subwoofer spacing should be reduced to less than 70 cm (2.5’). The acoustical gain when mutual coupling occurs
is shown in the table below:
Number of
Number of Number of
Number of
Subwoofers
Subwoofers Subwoofers
Subwoofers
Acoustical Gain
Acoustical Gain Acoustical Gain
Acoustical Gain
[dB]
[dB] [dB]
[dB]
1 0.0
2 6.0
3 9.5
4 12.0
An additional benefit of multiple subwoofer systems is the possibility to reduce the side wall interaction thereby
improving the side-to-side low frequency reproduction. This is important in studio applications where the sound
engineer needs to move left and right along the mixing console, or where there are multiple listening positions
along a large format mixing consol, for example in the movie industry. The subwoofer should be positioned along
the front wall to generate a plane wave down the room. This is called a “Plane Wave Bass Array™” (PWBA™). The
required number of subwoofers depends on the width of the room: wider rooms, more subwoofers. Two to four
are recommended for small rooms and three to four for larger rooms. The subwoofers should be positioned along
the front wall with a suitable spacing (see comments above) to generate a plane wave down the room. Please
refer to the “Product Selection Guide” for suggest system solutions.
A summary of the advantages and disadvantages of a single and multiple subwoofer systems is shown in the
table below:
Advantages Advantages Advantages Advantages Disadvantages Disadvantages Disadvantages Disadvantages
Single subwoofer Single subwoofer Single subwoofer Single subwoofer
systems
systems systems systems
Lower cost
Less total space required
Might be easier to setup
Consistent acoustic summing in the
listening area
One large cabinet may be hard to position
No suppression of side wall interactions
No suppression of room resonances
Multiple subwoofer
Multiple subwoofer Multiple subwoofer
Multiple subwoofer
systems
systems systems
systems
Multiple smaller cabinets may be easier to
position in the room
Suppression of side wall interactions
(PWBA™)
Suppression of room resonances (PWBA™)
Higher cost
More total space required
Might be harder to set up
Possible inconsistent acoustical summing in
the listening area
See the Volume Control section for details on how to control multiple subwoofer systems.
Interconnection Examples
Interconnection Examples Interconnection Examples
Interconnection Examples
In the following interconnection diagrams, O 300 and O 810 have been shown as examples. Other products from
the Klein + Hummel range can be substituted, for example O 410 and O 870. Please refer to the “K+H Product
Selection Guide” for building balanced systems.