Neumann.Berlin KH 805, Operating Manual

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KH 805 |
13
Using subwoofers in a 4-way system
To build a larger system:
X
Install the subwoofers and loudspeakers like columns:
Left
Right
Center
INPUT RIGHT
OUTPUT RIGHT
INPUT
DAISY CHAIN
OUTPUT
DAISY CHAIN
INPUT
INPUT RIGHT
OUTPUT RIGHT
INPUT
DAISY CHAIN
OUTPUT
DAISY CHAIN
INPUT
INPUT RIGHT
OUTPUT RIGHT
INPUT
DAISY CHAIN
OUTPUT
DAISY CHAIN
INPUT
X
Connect the channels Left, Center, Right of your audio source to the subwoofers according
to their physical position (see diagram above):
• Connect the channel Left to the socket INPUT | RIGHT
C
of the upper left subwoofer, con-
nect the channel Center to the socket INPUT | RIGHT
C
of the upper center subwoofer
and connect the channel Right to the socket INPUT | RIGHT
C
of the upper right sub-
woofer .
X
Set the switch RIGHT CHANNEL INPUT MODE
K
on all three upper subwoofers to RIGHT .
X
In each position (left, center, then right), connect the socket OUTPUT | DAISY CHAIN
D
of
the upper subwoofer to the socket INPUT | DAISY CHAIN
C
of the lower subwoofer .
X
Set the switch RIGHT CHANNEL INPUT MODE
K
on all three lower subwoofers to DAISY CHAIN .
After calibrating the main loudspeakers, the subwoofers should be acoustically calibrated so
that they smoothly extend the bass response of their respective main loudspeaker down in
frequency from 80 Hz to below 20 Hz . There is no need to adjust the acoustical controls on
the lower subwoofers because the acoustical control settings made on the upper subwoofers
will be tracked by the lower subwoofers .
Finally, the LFE channel should be routed to the LEFT, CENTER and RIGHT outputs of the
source . The level of the LFE channel should then be adjusted in the source to give a 10 dB
higher level in the room compared to any one of the main channels .
Alternatively, separate subwoofers can be used to reproduce only the LFE channel .
For a stereo system, leave away the center loudspeaker and subwoofers, and ignore the LFE
comment above .
Do not use the subwoofer in parallel to the main loudspeakers by replaying the low frequen-
cies of the signal using both the subwoofer and the main loudspeakers . Doing it this way
leads to constructive and destructive interference where the responses overlap due to the
different phase responses of the drivers . The result is an uneven bass response in the room,
especially if you are moving around . Always connect the subwoofer in one of the ways shown
above .