LM 260
Loudspeaker Management Processor |
Owner’s manual
15
LM 260
LOUDSPEAKER MANAGEMENT PROCESSOR
On the bottom we’ve 6 sections for crossover settings.
First of all there are 3 LINK locks to link odd (which has priority) and even outputs.
HPF - allows you to chose the frequency and the type of each band High-pass filter
LPF - allows you to chose the frequency and the type of each band Low-pass filter
G can be used to make Gain small adjustments
D is useful to set each driver Delay time
In the example shown in preview pic (page 14), we set a Stereo 3-way crossover type, with linked output pairs.
Subwoofers are cut with a 150Hz 24dB Butterworth slope, with 4.00 ms Delay line, to alignate the emission of the sub with
the emission of the satellites.
Satellites woofers have a 120Hz 24dB Bessel slope, thus achieving a small overlap with subs, and HPF @ 3500Hz, 24dB Butterworth
slope.
Hi-frequency drivers have a 3500Hz 24dB Butterworth slope, and no HPF cut.
6.5 OUT PAGES
OUT PAGES
The main screen shows frequency response from 10Hz up to 20kHz, and 10-band PEQ operations from +15dB up to -15dB. On
the left there is the MIXER section, with two sliders: In 1 and In 2.
The PEQ section has one ON box (when it’s lit, that band is active), followed by a TYPE box (Allpass; Bell; High Shelf; Low Shelf
and Notch) and active boxes for FREQ, Q and GAIN. On the bottom you have crossover HPF and LPF sections with preset boxes
for crossover type and active boxes for frequency setting.
The activity of these controls is shown in main screen as a graph, with overall settings shown by a white line.
On the right you have a very large output GAIN slider ranging from +12.00dB up to -48.00dB; on the bottom there’s a active
box indicator. Then you have the MUTE and INVERT indicators, lit when the switches are activated.
The DELAY knob adjusts the delay line from 0.00ms up to 5.00ms, with 0.01ms steps.
On the bottom right corner you have the LIMITER section with THR (Threshold) from -30dB up to +9.00dB, with 0.25dB steps.
Finally there’s the REL (Release) control, which is adjustable from 1.00 up to 100.00.
