User's Manual
18 MANCHESTER Series Quick Start Guide 19
EQ STRATEGY: Considerations for consistant frequency response in the sound eld
Flat arrays (minimium inter-element angle between
elements) will have an increase in the mid frequency band
typically between 630 Hz -2 kHz
Flat Array
Low Frequencies Mid Frequencies
Boost in Mid Energy
due to physical coupling
Flat Array Frequency Response
High Frequencies
Curved array (inter-element angle used between elements)
will have decrease in the mid frequency band typically
between 630 Hz -2 kHz
Curved Array
Low Frequencies Mid Frequencies
Cut in Mid Energy
due to physical de-coupling
Curved Array Frequency Response
High Frequencies
It is recommended that you split the EQ strategy to suit
the mechanical curvature of the array to gain consistant
frequency response.
Example: Here we have a typical J curved array of 8 MV212
elements – as we have 2 MV212 elements per LAKE DSP
module, it gives 4 discrete ZONEs that can have small
adjustments in the mid band area that is aected by
the mechanical aiming of the array causing coupling
and de-coupling.
Using one of the many industry-standard measurement
software systems, reference microphones and sound-cards,
nd the mid range frequency aected, and adjust each zone
for consistant frequency response between zones / sound
eld area.
LAKE software oers integration to many of these
software systems, further information can be found
at www.labgruppen.com
SUBWOOFER TIME ALIGNMENT ILLUSTRATION OVERLAY
MS215 and MS218 pre-sets use all-pass lters to set
the initial time alignment (assuming the fronts of
the cabinets are in line) this greatly reduces system
latency.
For example: If the fronts of the MV212 and MS215
are aligned, then in both pre-sets, the delay should
be set to the default which is 0ms.
However, in the real world it is not always possible
to have your own array and your ground stacked
bass aligned in the vertical plane.
1. In the picture to the right, the MS215 subs are
‘forward’ of the MV212 own array. So the MS215
subs need to be delayed .
1. Subs are forward
2. In the picture to the right, the MV212 own
array is now ‘forward’ of the MS215 ground stacked
subs. So the MV212 array needs to be delayed.
So how do you nd the correct delay time to align
the own array to the ground stacked bass?
Some basic knowledge of delay units can get you
an acceptable result by measuring the distance
between the fronts of the own array and the front
of the ground stacked array. Remember within
LAKE software you can choose the delay unit;
ms, m, or feet.
1 ms (milliseconds) = 0.343 m (meters) = 1.125
ft (feet)
Further ne-tuning can be done by using one of the
many industry standard measurement software
systems, reference microphones and sound-cards.
LAKE software oers integration to many of these
software systems, and further information can be
found at www.labgruppen.com
2. Flown array is forward