Induction Dynamics SW4.iw, Owner'S Manual

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5
Subwoofer
Information
Subwoofer Design
Non-realistic, “boomy” bass frequencies are so prevalent in the home theater world that
some listeners have never heard a well-tuned subwoofer. The “boom” occurs because every
subwoofer has a natural resonance peak—that is, every subwoofer will naturally produce
a narrow range of low frequencies at a higher volume than the rest. This “boom” drowns
out higher frequencies your subwoofer produces, resulting in diminished performance and
muddy, poor-quality bass.
Induction Dynamics® engineers its subwoofers with high-performance drivers and
specialized filter circuits to eliminate resonance peaks and produce a fuller sound expressing
all bass frequencies.
Most subwoofers do not attempt to reproduce ultra-low frequencies because of the distortion
created by excess excursion. Induction Dynamics eliminates this distortion with a patented
frequency-selective excursion limiter. The excursion limiter allows the subwoofer to produce
ultra-low frequency sound but prevents the driver from overexerting and causing distortion
that could ruin your listening experience; the limiter itself is transparent, operating only at
specific frequencies without audibly switching on and off.