5. Crossover, Equalization and Limiting
•
The signal going to an SA-6 should be high-pass filtered at a minimum of 150 Hz. For the SA-12, the minimum frequency
should be 100 Hz. In both cases a 24dB/Octave Linkwitz-Riley filter is recommended.
•
A typical starting EQ-curve for the SA-12 is shown below:
Filter 1: F=1590 Hz; Gain=-1.8 dB; BW=0.714 Octave (Q=2)
Filter 2: F=4000 Hz; Gain=-4 dB; BW=0.714 Octave (Q=2)
Filter 3: F=8000 Hz; Gain=-12 dB; BW=0.479 Octave (Q=3)
Filter 4: F=10100 Hz; Gain=+6.5 dB; BW=2.543 Octaves (Q=0.5)
The SA-6 will typically require a little more gain above 10 KHz and doesn’t require Filter 1.
It is advised that you do a proper analysis and equalization once the speakers have been mounted in the room and the
acoustical environment has stabilized (i.e. furniture, carpeting and wall treatments in place).
•
It is always a good idea to add limiters in front of your amplifiers. These should be set so that they do not operate except
occasionally during normal use, but begin to operate during louder passages. Besides protecting your loudspeakers this has
the potential to make the system sound better when driven hard.
