bout the Ultima 5
The Ultima 5 loudspeaker is based on strict formal design
considerations, which enable the speaker to deliver superb
acoustic results. These are the main design concepts behind the
Ultima 5:
1) In conventional speaker enclosure design, the sensitive parts
of the diplexer (frequency crossover network) are exposed to
the sound waves from the bass woofer. This adversely affects
the diplexer’s output. The Ultima 5 addresses this problem by
taking the diplexer out of the actual enclosure and embedding
it in the base block, where it is not directly exposed to vibration.
2) The height of the speaker cabinet in the room and the
surfaces that the speakers reflect off are crucial factors in the
sound that is produced by the loudspeaker. Ideally, these
parameters should be controlled through the cabinet design.
The so-called 'speaker stand' is not just an external device for
placing the speaker cabinet according to visual and practical
considerations, it also deeply impacts on the sound quality.
The Teufel Ultima 5, therefore, firmly integrates the cabinet
mount and the speaker height into its acoustic design.
3) All edges and protruding parts on the speaker baffle,
regardless whether they are for constructive or aesthetic
reasons, cause sound refractions and diffractions. As a result,
the sound pressure level may fluctuate significantly across the
frequency spectrum.
To avoid this, one of the constructive goals in speaker enclosure
design is to have as few edges and protrusions around the
baffle area as possible.
Protruding frames on the outside of the cabinet for holding
speaker grilles/covers can be particularly detrimental to the
SPL curve. The Ultima 5 circumvents this issue entirely by
attaching all speaker covers magnetically rather than with
frames.
With these structural considerations in mind, Teufel's
longstanding Managing Director Peter Tschimmel designed an
elegant column loudspeaker with excellent acoustic response.
In 1991, Tschimmel’s speaker design was acknowledged with the
prestigious “Design Innovation” award by Design Zentrum
Nordrhein-Westfalen in Germany.
As Teufel Lautsprecher was only just starting as a direct
distributor at this point, these loudspeakers were only available
for a very short period of time – long enough, however, to
inspire similar speaker designs by major consumer electronics
manufacturers across Germany and the UK.
The recently released Ultima 5 is a reissue of Teufel's much-
lauded original column speaker. While all the exterior
dimensions were retained, the new Ultima 5 contains only the
latest in state-of-the-art loudspeaker and diplexer technology.
The square-top speaker enclosure measures just 17 cm per side
and is mounted on a wider base block. Like in the original
design, the diplexer is housed in the base in order to protect it
from vibrational interference. The base block also provides the
connection panel, with gold-plated speaker terminals for full-
range, bi-wiring and bi-amping operation.
With its individually covered speakers, the Ultima 5 column
cabinet has a very distinctive appearance. At first glance, the
individual speakers seem to be randomly distributed across the
front panel, but in fact they are carefully placed according to
acoustic, technological and aesthetic considerations. The
overall proportions between the speakers are based on the
golden section, an ideal geometric ratio that has been known
since antiquity. The tweeter is at ear level with a seated
listener, thus ensuring maximum clarity. The midrange speaker
immediately below the tweeter has a separate enclosure, as do
the bass woofers. The woofers are wired in parallel and have
reflex ports on the rear for additional bass reinforcement. All
the covers of the individual speakers are level with the front
panel, which eliminates the diffractions that would otherwise be
caused by protruding speaker grille frames.
The Ultima 5 loudspeaker impressively demonstrates that
innovative design can not only look very appealing but also
provide significant technological advantages.