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6. OPERATION & BASS MANAGEMENT
The 2520P monitor are specially designed to be used in combination with M&K Sound subwoofers, both in
setups with “external” bass management control units or without.
Using 2520P with the M&K Sound BMC-1 Bass management controller for 2 channel or multi-channel mix
setup, will provide the most correct set up conditions for 2520P and subwoofer(s). The M&K Sound BMC-1
Bass Management controller offers professional balanced connections for high pass and low pass filtering,
with individual channel level calibration for 2.1 or 5.1 setups for direct connection to 2520P monitors and
M&K Sound subwoofers.
Wide / Narrow directivity selector
Select “Wide Mode” when 2520P are to be used as a
“free-standing” speakers in near to mid field positions.
Optional select “Narrow Mode” to activate vertical directivity
control for nearfield listening, if placing 2520P direct on mixing
consoles or close to reflecting surfaces.
Main Power on/off
Turns the system on/off.
Status LED are present on front and back of speaker.
Fuse holder
Fuse type T5AL 250Volt for 110 / 120 Volt
Fuse type T3.15AL 250 volt for 220 / 240 Volt
Caution! Always disconnect power cord before changing fuse,
Replace fuse only with same type.
Main Power socket
Use the included power chord for the main power connection.
Voltage selector 115 / 230 Volt.
Caution!
Always disconnect power cord and check the fuse has correct
value before changing the input voltage.
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2520P High pass filter shall be set to position “OUT” when used together with M&K Sound Bass
management controller, and subwoofer crossover setting shall be “BY-PASSED” - as the Bass management
control unit will handle correct filtering for signals send to monitors and subwoofers.
When using the 2520P without a bass management control unit, the 2520P High pass filter shall be
activated to “IN” position” to cut of low frequency bass content from the monitors.
Connecting the M&K Sound subwoofers using the 2520P “Pass Thru” outputs create good “bass logic”
when either using 1 or 2 M&K Sound subwoofers, as M&K Sound subwoofers are featured with dedicated
input sockets for mono sub signals and Left and Right input signals.
In case of using 1 sub, the Left & Right main signal outputs from a mixer or monitor controller shall be
connected to the 2520P inputs for respective Left & Right speakers inputs, and by using the 2520P “Pass
Thru” output socket – the main signals will be carried on to the subwoofers and summed internally in the
subwoofer. The use of both Left & Right inputs on the subwoofer, will provide correct bass output by “one
subwoofer” in a given system setup.
In case of using two subs, the main Left & right signal outputs from a mixer or monitor controller will also
by using the “Pass Thru” connectors on the 2520P – route each main channel signal from source to each
subwoofer, which logically shall be connected to the subwoofers mono input socket.
In setups without a dedicated Bass Management controller, the subwoofers internal crossover filter
setting is the crucial feature to adjust for perfect match to the 2520P monitors. Typically, it will be
subwoofer crossover setting in the range between 100-120, Hz that will make good summation between a
pair of 2520P monitors and subwoofers.
When using 2520P together with other types of “studio monitor controllers” or HiFi preamps featured
with dedicated subwoofer output connections, then make sure to firmly check how these operates for sub
bass content.
Some units just have their left and right channels summed into a common “sub out” channel, while
the main channels at the same time provide full frequency bandwidth to their respective left and right
channel outputs.
In such setups the 2520P is recommended to operate with high pass filter activated (“IN” position) alike
setups without External Bass Management” - to make sure the Bass response of the 2520P will be
properly filtered.
If the studio monitor controller or HiFi preamp itself offers both high pass and low pass filtering, the
2520P shall be set to operate with High pass filter “out”, as then the monitor controller or HiFi preamp
will handle the crossover filtering between the subwoofer and 2520P monitor.
Using the 2520P with modern surround sound amplifiers or processors, the Bass management control will
be present by the surround sound “equipment”, and the 2520P shall also in such setups operate with High
pass filter in “OUT” position.
Modern surround amplifiers, processors and monitor controllers are according to their build in decoding
processors for various surround sound formats and crossover filter options, not always made with same
designs, and some products may offer more features than others.
Normally the basic options for proper Bass management control will be present in such dedicated
equipment, but always check the actual unit for their technical specifications, to make sure proper Bass
management control is possible to make, when using the 2520P monitor and M&K subwoofers in such
setups.
