18
•
Only practical in combination with very high quality loudspeaker systems; not recommended for
subwoofers
Linkwitz
•
Very good impulse behavior
•
No steep transition from the passband to the stopband
•
No gain at the crossover frequency
•
Only useful in combination with very high quality loudspeaker systems; not particularly recom-
mended for subwoofers
Chebyshev
•
Very sharp transition from the passband to the stopband
•
Poor impulse behavior
•
Frequency response exhibits waviness (1 dB “ripple”)
•
Only recommended as a low-pass for subwoofer or as a high-pass as required for tweeters
which are operated near to their resonance frequency
Self-Define
• Only available as a 12 dB filter, with adjustable filter values
• Useful as a high-pass filter in so-called “filtered bass reflex systems”, whereby the crossover
frequency usually corresponds to the tuning frequency of the bass reflex tunnel
Examples of the different filter characteristics are presented for a 1000 Hz high- and low-pass filter
with a slope of 24 dB.
Fig. 1:
Filter characteristics of the high-pass
