Loudspeaker 1

A single front-mounted high-grade 8″ full-range driver
connected in series with a 12-inch bass transducer
mounted in the side of the cabinet are loaded by the same
carefully tuned tapered quarter-wavelength tube
(TQWT), which provides a resistive load to the speaker
cones throughout the low-frequency band, thereby
reducing overall cone excursion (and thus speaker
distortion) and ensuring controlled, powerful and
deep bass reproduction. As a result both drivers operate
at full-range. The flat response of the full-range unit
is achieved solely by the impedance rise of the bass
transducer without the help of additional correction
or crossover networks. In this sense the speaker
can be referred to as a true full-range
point source reproducer.

A further major element of the design is the
wide-dispersion constant directivity super tweeter
treble horn radiating from the top of the cabinet.
This unit serves to counteract the (unavoidable) directivity
of the full-range driver in the upper band while leaving
its point-source coherency completely intact,
as it radiates “off-axis" without a crossover point
to the main driver. Such the often encountered yet
rarely addressed problem of listening-room
colorations that are inevitably caused by
directive speakers ist overcome!

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