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Settings
Setting up the AV receiver/amplifier
For the System 9 THX
®
Ultra 2 with M 9500 SW
Active Subwoofer, set the "Speaker Setup" sec-
tion of your AV receiver to "small" or "normal"(not
"large") for the satellite speakers. This ensures
that the speakers receive the right amount of
signal, and that the subwoofer and front speakers
have matching volumes.
Also in the receiver's "Speaker Setup" section
(Bass Management/Speaker Management), make
sure the subwoofer is set to "On" . Set the cross-
over frequency for the System 9 THX
to 80 Hz.
Setting up the M 950 D dipole speakers
The M 950 D provides a speaker response switch,
which is located above the connection panel on
the rear. Three response modes are available:
"Bipole" , "Dipole" and "Monopole" . We recommend
using the dipole response mode in most settings.
Direct monopole response is only advisable in ex-
ceptional situations, e.g.:
1) The speaker cannot be placed close to a wall to
reflect off.
2) Some multi-channel music recordings, e.g., on
SACD or DVD-Audio media, require a surround
sound setup where all the speakers have a dis-
tinct directionality.
Setting up the subwoofer
If your system is based around an AV receiver, set
the subwoofer's frequency control to maximum;
the AV receiver automatically determines the
crossover frequency in relation to the subwoof-
er's output.
Modern AV receivers can also determine the sub-
woofer's phase automatically. This happens within
the receiver's "Speaker Setup" utility, which anal-
yses the distance between the different speakers
and the listening spot. For this to work correctly,
the subwoofer's own phase switch needs to be on
"0°"(LED 2 is off ).
If your system uses an older-model AV receiver
or another type of amplifier without a setting for
the subwoofer distance:
The "Phase" control lets you adjust the sub-
woofer to the satellite speaker so that the mem-
branes of all the speakers vibrate in the same
direction ("phase") when reproducing signals
around the crossover frequency. If the phase is
set incorrectly, this may cause a reduced bass
response or even bass cancellations. If the sub-
woofer is positioned between the front spea-
kers, we recommend a phase setting of "0°"(grey
Ultra 2
area in the diagram on page 9); if the subwoof-
®
er is positioned closer to the listening spot, a
phase of "180°"(LED 2 is on) may be more appro-
priate. Similarly, the "180°" setting may help to
eliminate bass cancellations if you position the
subwoofer in other areas of the room. Always set
the phase control to the position where the bass
response is best.
The subwoofer's output setting may vary de-
pending on usage, e.g., home theatre sound
system or music playback. Whereas an action-
packed DVD typically contains very defined sub
bass signals, many music-only sources do not.
This is especially noticeable if your system is
calibrated for optimum DVD playback. To find
the best compromise between differing sound
sources, use your own subjective judgement.
Our recommendation is to determine the best
subwoofer volume gradually over time.
Avoid configuring the subwoofer volume auto-
matically via your AV receiver's integrated room
analysis computer (advanced receivers only). In-
stead, set the subwoofer level provided in the
Bass Management/Speaker Management section
"Speaker Setup") to a high value, such as +4 to
+12 dB. This will guarantee that the subwoofer
activates itself at the right times when in "Auto
On/Standby" mode, and you can then use the sub-
woofer's own level control to experiment with dif-
ferent bass levels.
Teufel · System 9 THX
®
Ultra 2
13
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