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To never stop improving has been part of the Audio Physic philosophy since day one, and the new Classic 25 is a good example of that approach. We incorporated many solutions, materials, and technologies originally developed for our Reference Line to create an affordable loudspeaker that comes very close to our top-of-the-line speakers in terms of acoustic performance.
Like its predecessor, the successful Classic 20, the Classic 25 uses our unique Sandwich Cabinet Construction. This consists of a strong internal core to which back-painted glass panels are glued from the outside with elastic acrylate adhesive stripes. Because of the completely different resonance characteristics of glass and MDF, and the damping properties of the elastic acrylate, vibrations of any kind are very effectively subdued, unwanted ‘cabinet sound’ is simply not an issue anymore.
The adhesive stripes also provide an exactly defined gap between the core and the outside panels, with a sound-insulating effect similar to that of double-glazed windows: There is no transmission of sound from the inside of the cabinet to the outside other than what comes out of the front of the drivers themselves. The overall effect is simple but stunning: What you hear is not the speaker but just pure music.
Another unbeatable advantage of these glass panels is their extremely durable high-gloss surface that’s vastly superior to any conventional paint finish. Even after many years they will look as pristine as when they were new, having lost nothing at all of their brilliance and depth.
The Classic 25 inherits another design specialty from the Classic 20 – the invisible Subwoofer. This is placed in its own volume inside the internal cabinet, the bass-reflex vent is located at the bottom of the cabinet, opening towards the speakers plinth. A piece of high-tech Ceramic Foam in front of the opening prevents undesirable chuffing noises common to other bass-reflex designs. However, the woofer inside the Classic 25 has grown in size compared to its predecessor: It now measures 8 inches in diameter, providing a significant improvement in low-end performance.
All other drivers represent the current state-of-the-art for our Classic Line, too. The midrange driver sports the unique Audio Physic Dual Basket Design, a woven glass fibre diaphragm and a Phase Plug mounted directly onto the magnet motor to help with heat management inside the driver. The attention to detail that went into this driver is especially important as the human ear is very susceptible in the frequency range covered by it because this is where most of the human voice happens. The clarity and naturalness of this drive unit’s sound are unrivalled in this price range.
The magnetic motor of the Classic 25’s tweeter is elaborately ventilated as well, so that the soft dome made by a German specialist company always finds ideal operating conditions even under heavy load. Thanks to the powerful motor and the low self-resonance, the tweeter achieves exemplary signal integrity far beyond the audible range. A small horn-shaped sound guide surrounds the actual dome and ensures a seamless transition between mid and high frequencies. So even outside of the so-called sweet spot you will be able to enjoy a relaxed musical experience.
All in all our new Classic 25 is a significant improvement from the already very good Classic 20. It’s so good, in fact, that in terms of acoustic performance it comes very close to some of our REFERENCE Line speakers like the Avanti 35. Within its actual price range, the Classic 25 is without doubt a class of its own.
With the real wood variants walnut or cherry, natural real wood surfaces meet noble black glass on the narrow front and thus convey restrained elegance.
Our unique Sandwich Cabinets are an innovative way to stop the speaker cabinet from developing an acoustical life of its own. It is especially effective with our stylish glass-finished speakers as the relatively high weight of the glass panels helps dampening the cabinet even better.
AUDIO PHYSIC’S unique DUAL BASKET DESIGN is a true break-through innovation and the most important part of the HHCM-III technology. Instead of the tradition single basket, our HHCM-III features two separate baskets to prevent and subdue unwanted vibrations already at the source.
Some of our speakers feature an internal woofer inside the cabinet provides the same deep bass and punch as an additional subwoofer without anyone ever having to see it.
Ceramic Foam is a high-tech material used for internal bracing in many of our speakers. It is much stiffer than MDF although it consists of 85% air. This means, the room taken up by the internal bracing is also part of the effective volume of air the drivers need to work. By using Ceramic Foam, we can build loudspeakers that match and out-perform much bulkier speakers.
The best feet for our – and other – speakers. VCF provide a substantial improvement of sound performance by reducing transfer of unwanted vibrations while at the same time protecting delicate surfaces. Also available as VCF Component for Hi-Fi separates and as VCF Cable Supports.
The 3-way speaker features three different drivers that share reproduction of the entire frequency range. One or more woofers, a midrange driver and a tweeter. Usually the crossover frequency between low and mid frequencies is set between 150Hz and 300Hz, and between 2,000Hz and 3,000Hz for the transition from the midrange to the tweeter.