EPOS M Series - Manual (Page 5)

Low Level Input
(See connection comments at the beginning of page 4) If your amplification system has a
dedicated subwoofer output it should be connected to either the left or right low level input. If you
have a mono connection from your amplifier you may use either connection.
Low Level Output
The low level output is filtered by the M subwoofer circuitry to provide a signal back to the L&R
front speakers that has had its low frequencies removed. The M subwoofer will provide these low
frequency signals exclusively, to prevent a conflict.
High Level Input
If your receiver system does not have a dedicated subwoofer line output, your subwoofer must be
connected via the high level input terminals on the rear panel. Connection should be made from
the speaker terminals on your amplification system to the High Level Input Connections.
Note: Only connect using line level inputs OR high level inputs.
DO NOT USE BOTH METHODS OF CONNECTION AT THE SAME TIME.
High Level Output
The high level output is filtered by the M subwoofer circuitry to provide a signal back to the L&R
front speakers that has had its low frequencies removed. The M subwoofer will provide these low
frequency signals exclusively, to prevent a conflict. It is possible to run a connection from the high
level output to your speakers if you do not have a direct connection from your receiver.
Volume
As a starting point, set the output of your receiver or decoder to 0dB level and then adjust the level
of the subwoofer to suit the room using the volume control on the rear panel. Thereafter, small
adjustments can be made more easily using the volume control on your receiver, via its remote
control, rather than adjusting the volume from the back of the M subwoofer.
Low Filter
Adjustment is necessary to extend or reduce the low frequencies the subwoofer is able to produce
so that it can compensate for the small size of the M subwoofer and your room acoustics. Some
movie passages contain massive amounts of low frequency information at intervals, so care should
be taken not to set the volume and low filter such that it causes distortion or limiting, due to being
played too loud. It is better to use two subwoofers at a lower level setting than over-drive one. Your
room size and personal sound preferences will determine how much sound pressure level (SPL)
is required to create a realistic performance.
N.B. Not everyone will appreciate the effect of sub-sonic movie effects. Even if you think they are
great, please remember that low frequencies travel through walls much more easily than high
frequencies, so please give a thought to neighbours or other family members who don't share your
passion.
Hi-Filter
Adjustment is necessary to match the M subwoofer to the remaining speakers in your system. As
all speakers have a different low frequency range, depending on their size and how many
drivers they use, it will be necessary to adjust the upper roll over point of the M subwoofer to
better integrate with the output of the front and centre channel speakers.
Page 5