Ver 1.0 Feb 2014 14
The G4 is also a dipole radiator with the front and rear tweeters,
midrange and mid-bass couplers are open front and back and
mounted on a light, resonance-managed baffle with no enclosure.
This has two advantages: firstly, it eliminates any enclosure or boxy
colorations caused by cabinet vibrations or resonance. Secondly,
the dipole creates a cardioid radiation pattern (like a figure-eight),
which has its maximum output at the listening position and behind
the speaker itself, and minimum output to the sides in the plane of
the loudspeakers. This very effectively minimizes the bounce from
the sidewalls resulting in fewer detail-robbing room reflections than
other types of loudspeakers. With fewer spurious reflections to
confuse your hearing, the program source emerges more clearly.
Imaging is deeper, yet more focused.
The Genesis Ring-Radiator Ribbon Tweeter
Reviewers in the audiophile press have often remarked that the
Genesis ribbon (technically, it is a planar-magnetic) tweeter is the
world’s best. It is a one inch ring-ribbon design crafted from an
extremely thin membrane of Kapton with a photo-etched aluminium
“voice coil” that is a mere 0.0005 inch thick. The entire radiating
structure is a 4mm wide ring that has less mass than the air in front
of it! That is why it will accurately reproduce frequencies with true
point-source dispersion to 40 kHz. (As comparison, a 1”
diameter dome will only have true point-source
dispersion to about 13kHz.)
The result of this design is a driver that has a rapid and
uniform response to high frequencies, and has the speed
of the best ribbon/electrostatic designs without the high
distortion and poor dispersion that is typically associated
with large, squarish ribbon tweeters. The G4 also use a
rear-firing tweeter with its own independent crossover
out of phase to the front tweeter creating a dipole.
6-inch Ribbon Midrange
We sometimes say that the midrange is a window into the mind of
a composer or a singer. And indeed, the midrange is where the
“magic” is in a well-recorded musical event. This is why the G4
uses a ribbon (technically also a planar-magnetic) for a midrange.
The midrange ribbon used in the G4 is manufactured to Genesis’
exacting specifications. The ribbon itself is made of a very thin layer
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