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and light enough to react extremely quickly. The G4 features two
side-firing 10-inch woofers per channel.
While the servo system is able to ensure that the driver works
linearly as a perfect piston, it is unable to correct for distortion
caused by cone wobble, bending, and break-up. Hence, the drivers
were designed to minimize these non-linear distortions.
A pair of matched woofers are horizontally opposed and in phase
with one another, with the vibrations generated by one woofer
cancelling out the vibrations generated by the other woofer –
further reducing any image-distorting vibrations in the loudspeaker.
Servo-controlled Bass Amplifier
The servo-controlled bass is a holistic system of woofers,
acceleration sensors, servo-feedback circuits, crossover circuitry
and amplifiers. The system places extraordinary demands on the
amplifier because the system uses enormous amounts of current to
make the woofer follow the input signal. In order to deliver this
current, a Class D amplifier module is used with specially designed
and tuned Dynamic Power Delivery System (DPDS) power
supplies.
One side benefit of this powered woofer system is that almost “any”
sized amplifier can be used to drive the mid/tweeter section of the
Genesis 4. No longer must one choose between having an
amplifier with enough power to drive the woofers, and a smaller
amplifier having better spatial and tonal characters. Nevertheless,
we do recommend no less than 100 watts as a minimum for the
midbass/tweeter section due to the need to drive a pair of dynamic
5.5-inch titanium mid-bass couplers.
The Acoustic Suspension
The suspension for each loudspeaker comprises three elements:
1) The neoprene vibration absorbers are tuned to isolate and
decouple the loudspeaker cabinet for optimal imaging and
bass response no matter what surface the loudspeaker sits
on.
2) The skeletal frame acts as a tuned absorber. Made of an
inch of solid HMWA (high molecular weight cast acrylic), no
two parts of the frame will resonate at the same frequencies.
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