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#4 DUAL BAND BASS ™ There’s no such thing as a woofer that does a really great job at both bottom octave and mid-upper bass. Low frequency “pumps” have motors designed for excursion, read: larger and heavier, which is detrimental to the articulation we’d like in the mid-upper bass. The nimble drivers best at mid-upper bass do not have the displacement to reach useful amplitudes at the very bottom. Displacement, just as in an internal combustion engine, is the total piston area multiplied by the stroke. It’s a volume that sets the upper limit on bandwidth/output. As we discussed earlier, when we reach for low bass, we’re facing an adverse square function - which means we need lots of displacement. Drivers designed for that much displacement just can not be as articulate as we’d like for mid-upper bass. Simple solution: run both low frequency pumps and dedicated mid-upper woofers. No surprise: that idea has never come out well using passive filters. Having read section #1, you can probably guess that passive filters really don’t cut it at those frequencies. The very large value parts, needed for low frequency circuits, so seriously decouple the driver from the amp, that the whole idea has always been a nonstarter. But with DSP execution becomes trivial. We simply run two separate, critically damped bass systems, one for low bass and one for mid-upper bass. DUAL BAND BASS™. The result is multiple woofers that closely track their signals, each doing a great job of handling it’s narrow assignment; the net result is great sounding, more realistic bass. That “stereo sound” in the bass is gone, and bass detail and timbre that you never knew was there will delight. This advance is the single most rewarding bit of engineering I’ve done. You should own it.
TECH CHAPTERS
  • #1 ELIMINATION OF THE PASSIVE FILTER
  • #2 EXPANSION OF DYNAMIC RANGE
  • #3 A NEW AND SUPERIOR BASS ALIGNMENT
  • #4 DUAL BAND BASS
  • #5 A NEW CONTROL - BANDWIDTH/AMPLITUDE
  • - - RETURN TO TECH HUB PAGE - -
TECH CHAPTERS
  • #1 ELIMINATION OF THE PASSIVE FILTER
  • #2 EXPANSION OF DYNAMIC RANGE
  • #3 A NEW AND SUPERIOR BASS ALIGNMENT
  • #4 DUAL BAND BASS
  • #5 A NEW CONTROL - BANDWIDTH/AMPLITUDE
  • - - RETURN TO TECH HUB PAGE - -
NAV
  • HOME
  • MODELS
  • TECHNICAL
  • SYSTEM CONFIGURATION
  • COMMON ASPECTS
  • WHO WE ARE
  • CONTACT
#4 DUAL BAND BASS ™ There’s no such thing as a woofer that does a really great job at both bottom octave and mid-upper bass. Low frequency “pumps” have motors designed for excursion, read: larger and heavier, which is detrimental to the articulation we’d like in the mid-upper bass. The nimble drivers best at mid-upper bass do not have the displacement to reach useful amplitudes at the very bottom. Displacement, just as in an internal combustion engine, is the total piston area multiplied by the stroke. It’s a volume that sets the upper limit on bandwidth/output. As we discussed earlier, when we reach for low bass, we’re facing an adverse square function - which means we need lots of displacement. Drivers designed for that much displacement just can not be as articulate as we’d like for mid-upper bass. Simple solution: run both low frequency pumps and dedicated mid-upper woofers. No surprise: that idea has never come out well using passive filters. Having read section #1, you can probably guess that passive filters really don’t cut it at those frequencies. The very large value parts, needed for low frequency circuits, so seriously decouple the driver from the amp, that the whole idea has always been a nonstarter. But with DSP execution becomes trivial. We simply run two separate, critically damped bass systems, one for low bass and one for mid-upper bass. DUAL BAND BASS™. The result is multiple woofers that closely track their signals, each doing a great job of handling it’s narrow assignment; the net result is great sounding, more realistic bass. That “stereo sound” in the bass is gone, and bass detail and timbre that you never knew was there will delight. This advance is the single most rewarding bit of engineering I’ve done. You should own it.
TOP OF PAGE
TECH CHAPTERS
  • #1 ELIMINATION OF THE PASSIVE FILTER
  • #2 EXPANSION OF DYNAMIC RANGE
  • #3 A NEW AND SUPERIOR BASS ALIGNMENT
  • #4 DUAL BAND BASS
  • #5 A NEW CONTROL - BANDWIDTH/AMPLITUDE
  • - - RETURN TO TECH HUB PAGE - -
TECH CHAPTERS
  • #1 ELIMINATION OF THE PASSIVE FILTER
  • #2 EXPANSION OF DYNAMIC RANGE
  • #3 A NEW AND SUPERIOR BASS ALIGNMENT
  • #4 DUAL BAND BASS
  • #5 A NEW CONTROL - BANDWIDTH/AMPLITUDE
  • - - RETURN TO TECH HUB PAGE - -
NAV
  • HOME
  • MODELS
  • TECHNICAL
  • SYSTEM CONFIGURATION
  • COMMON ASPECTS
  • WHO WE ARE
  • CONTACT