ATC SCM20ASL - Page 16

C4
The C4 Sub Mk2 Limited Edition is designed to partner
the SCM20ASL Limited Edition and as such will typically
be used to extend and reinforce the LF performance
of this stereo system. It may also be used as a discrete
channel in multichannel surround/immersive systems.
Typically, a full-range stereo signal is driven into both
Left and Right subwoofer Inputs. The subwoofer
Outputs connect to and drive the main loudspeakers.
Alternatively, the C4 Sub Mk2 and main loudspeakers
can be driven independently from a suitable
preamplier/AV receiver. Example systems are shown
in Diagrams 8, 9 and 10. All subwoofers can be
controlled using the method described on page 27.
All panel settings should be set independently
for each subwoofer.
All ATC loudspeakers deliver signicant low frequency
output, more so with the larger monitors in the
range, therefore there will always be some degree of
acoustic overlap between the subwoofer and stereo
loudspeakers in this conguration. Applying an external
high pass lter to the main loudspeakers will introduce
Phase shift in the main loudspeakers and should be
avoided where possible. Good results can be achieved
through experimentation with the subwoofer Level,
Frequency and Phase adjustment.
A selection of common wiring congurations are
shown but other congurations exist, please contact
your reseller or ATC for advice.
Diagram 8 – Typical Conguration – Stereo playback
(Mono Sub). A preamplier or AV receiver Output
is connected to the L and R Inputs of the subwoofer.
The subwoofer L and R Outputs are connected to
the Input of the L and R main active loudspeakers. In this
conguration the Gain switch is normally set to 0dB.
Diagram 9 – Typical Conguration – Stereo playback
(Stereo Subs). A preamplier or AV receiver Output is
connected to a single Input on each subwoofer. The
corresponding Output of each subwoofer is connected
to the Input of the main active loudspeaker on that
channel. In this conguration, the Gain switch is normally
set to 0dB. Note that it is also possible to connect the
preamplier/AV receiver
Output to both Left and Right channel Inputs on the
subwoofer using a Y-Splitter cable. If connected in
this way the ‘spare’ Output can be used to connect
further subwoofers.
Typical System
Configurations
Bass Reinforcement/
Extension of System
L. Sub-Out
Pre-Amplier
L. Spk
In
R. Pre-Out
R. Sub
In
L. Pre-Out
L. Sub
In
R. Spk
In
R. Sub-Out
L. Sub-Out
Pre-Amplier
L. Spk
In
R. Pre-Out
R. Sub
In
L. Pre-Out
L. Sub
In
R. Spk
In
R. Sub-Out
DIAGRAM 8 SUBWOOFER CONNECTED IN SERIES
DIAGRAM 9 SUBWOOFERS CONNECTED IN SERIES
28
Limited Editi