“Teufel’s produced an intricate coaxial driver that embodies the principles of point source sound. The construction of the tweeter in the centre of the midrange driver ensures that the mid and high frequencies reach the listener at exactly the same time [...], but Teufel also equipped the midrange driver with a flat membrane. There’s so much high tech in this coaxial driver [...] that Teufel had the construction patented. The tweeter is a coated fabric dome, the midrange driver has an aluminium/kevlar sandwich membrane. These special material combinations make the drivers extremely light allowing for an extraordinarily precise transient response and decay.
But the Definion 5 has more unusual features to offer. The standing speaker, for instance, is equipped with three 130 mm bass drivers with aluminium paper fibre sandwich membranes. Teufel calls this the triple bass principle. Taking the combination of unique elements to the limit, the Definion 5 also features a sealed enclosure.”
“As remarkable as the technology may be, we of course ask ourselves what sort of impression Teufel’s latest excursion into the world of high-end stereo systems makes when the loudspeaker is sitting in front of us. Our first reaction was amazement. There’s been hardly a Teufel product in recent years that made such a refined, solid, and high-end impression. The black baffle extends all the way to the top of the loudspeaker. The very evenly lacquered matte white MDF cabinet tapers towards the back. This not only looks good, but has an acoustic purpose. This shape has the advantage of preventing the formation of standing waves in the enclosure. [...] The slightly elevated baffle creates an additional visual accent and the chassis is fixed to the baffle without an visible screws which enhances the elegant look.“
„The harmonious, homogenous overall acoustic design is laudable across all test criteria. The Definion 5 is therefore optimally suited for contemporary living rooms. The acoustics of modern living rooms and homes is often bright. This is because wood flooring or granite is usually found in these spaces. Exacerbating this effect are generous windows and often sparse furnishings. All of these factors come together to make traditionally tuned hifi speakers sound overly bright and aggressive instead of neutral. Slightly warmer tuning on the Definion 5, on the other hand, produces a lively and pleasant tone in contemporary interiors.
A completely synchronous group delay contributes to this impression. Not only the midrange and high frequencies, but also the bass all reach the listener at exactly the same time. [...] In order [...] to achieve perfect timing in the bass range, a variety of tricks was employed. Not only was the crossover designed with a great deal of care, the choice of three relatively small bass drivers positively contributes to the group delay. The small bass drivers are able to deliver even small impulses without time lapses. And since there is a total of three 130 mm bass drivers, the total membrane area is actually very large.
This brings us to the Definion 5’s next plus point – first-class bass reproduction characterised by an excellent depth, superb multi-dimensionality and enormous impulse fidelity. On top of this, there is a level stability that - in relation to enclosure volume and price class - sets new standards. The Definion 5 can be powered by even exceptionally high-performance top-of-the-line amplifiers without a problem.
There is, of course, more to life than just bass. That’s why we’re equally happy to report on the excellent definition in the mid – and high ranges. [...] The Definion 5 offers broad, cleanly differentiated dimensionality. It never sounds forced or artificially inflated, but is rather always true and authentic. This is why the Definion 5 can be recommended without hesitation for every style of music. Whether classical opera or electronic, the layers and structure are accurately reproduced with just the right amount of ambiance.
The Definion 5’s overall sound has excellent tonality– it never comes off as disruptive. The transitions between the individual frequencies are smooth which goes a long way to support this impression.”Conclusion
“Experience proves what no one anticipated: Teufel sets new standards with the Definion 5. The unusual and unconventional technical solutions are home runs. The coaxial flat membrane chassis with fabric dome tweeter provides perfect group delay, the three rather small bass drivers ensure precision and impulse fidelity in the low frequencies, and the sealed cabinet creates the perfection conditions for driver performance. Outstanding workmanship and an elegant design are additional highlights. Typically Teufel: The Definion 5’s purchase price is exceedingly fair. Whoever sees or hears these loudspeakers would guess they cost a lot more.”