CELSIUS 25

Return to Center: Audio Physic launches major update of the Center Celsius

Despite its rather unassuming name, the Center II has become a long-time favourite among home theatre enthusiasts over the years. However the name itself conveys the right idea since true home entertainment connoisseurs do not wish the center speaker to take center stage – neither in terms of name nor in terms of sound reproduction. When the rightful centerpiece is too dominant for its own good, it becomes clear that the adjustment is not right and that your center speaker is not properly matched to the main loudspeakers. Nothing is more important for a stable, accurate sound reproduction than a perfectly matched front speaker system which keeps up with the action on the screen, holding you unquestioningly and acceptingly in its spell. When Audio Physic rolled up its sleeves and got to redesign the Spark and Tempo loudspeakers, the top-sellers of its product line, it was only a question of time when the new Celsius would follow.

Tempo ingredients

Not only was the Celsius provided with a 25 mm (1'') soft dome designed for excellent dispersion, it was also equipped with not one but two 15 cm (6'') aluminium woofer/midrange drivers that were borrowed from the Tempo. All have been matched to ensure a seamless sonic blend in the future. It is no secret that a cabinet also strongly influences the sound reproduction and therefore Audio Physic did not just update the drivers but redesigned the cabinet as well. With its elegantly curved shape and effective rigid structure inside, the cabinet takes full advantage of the benefits of computer-supported design. The comprehensive update of the first choice in home entertainment sparked acoustic progress in effectively eliminating resonances and offering optimum dispersion as well as provided the Celsius with dashing good looks. All things considered it does not seem exaggerated to speak of the center speaker as a completely new design. Some improvements can even be observed in the rear panel: The solid terminal is made of aluminium, fitted with massive binding posts (WBT) and decoupled from the enclosure with a neoprene gasket. Therefore, vibrations are no longer transmitted via the cabinet to the connecting terminal and to the cables. Due to its magnetic shielding, you can place the Center Celsius right on top of your TV set or just below without experiencing image distortion.

It’s all for one and one for all

The Celsius sounds as good as it looks and is designed to be the perfectly matched center channel when used with the new Step bookshelf loudspeaker as well as the Spark, Tempo and Scorpio floor-standing loudspeakers, not to forget the Luna II subwoofer. It helps to precisely anchor dialogue and sound effects to your screen and achieves a seamless enveloping sound when combined with the other Audio Physic loudspeakers. The Celsius also delivers excellent speech intelligibility – just the way you want your vintage Audio Physic center channel speaker to perform when perfectly integrated into your home theatre system.

Design

Excellent resolution with dynamics

These are the outstanding characteristics of our newly developed tweeter. Thanks to its innovative membrane technology this ring radiator offers very extended frequency response (40 kHz) and high output. Its design properties ideally combine the advantages of metal and fabric cones.

The bass-midrange drivers operate in tandem. This doubles the membrane area improving response in the bass and mid-frequency range. The result is optimum speech intelligibility with minimal distortion even at high output levels.

The practical cabinet size together with its efficient magnetic shielding allow positioning close to CRTs’. It is also practicle to stand the unit vertically as a front or rear loudspeaker. In this position the angled base of the cabinet results in time-exact radiation.

The parameters of the loud-speaker chassis and the tuning of the crossover guarantee the identical tonal and phase properties of the Audio Physic SPARK and TEMPO and of the subwoofer LUNA.

Integrated combinations

A perfect AV surround system comes alive from perfect sound reproduction. This is why we have developed a center loudspeaker that is perfectly matched to our SPARK and TEMPO column loudspeakers. You can combine them at will know that your center speaker is optimally integrated.

Prove it to yourself: Take your favourite film, add the Celsius Center, get comfortable and immerse yourself in a fantastic world of sound and vision.

 

Active Cone Damping

Active Cone Damping (ACD) was first developed and implemented by Audio Physic in order to avoid resonances associated with metal cones. A silicone/rubber ring is mounted on the outer ring of the cone where it directly applies pressure on the cone. This is a highly effective means to eliminating the otherwise unavoidable ringing and therefore removes the metallic sound.

Push Push

Audio Physic's three-way and three-and-a-half way loudspeakers are equipped with side firing woofers. Even when applying large-diameter cones, our loudspeakers keep a narrow baffle design which allows for the superb spatial imaging Audio Physic loudspeakers absolutely excel at. Compared to the configuration often used nowadays where the woofers are mounted only on one side, Audio Physic prefers to arrange them on both sides of the cabinet. The drivers are operating in phase (all woofer cones move simultaneously in the same direction, either inwards or outwards). Forces acting on the cabinet are nearly cancelled out with this effective – so called push-push configuration – and precise, low-resonance sound reproduction is achieved. However, the push-push configuration must not be confused with the push-pull principle commonly used for power amplifiers.

Vibration Control Terminal :: VCT

A negative impact from unwanted resonances on the transmission of signals can be detected at each point of the reproduction chain. The use of high-quality and stable rack systems as well as special stands, feet or bases may often yield astonishing results.

However, no attention was paid to another important path of mechanical mischief-makers. Cables – necessary to transmit the signal – not only carry electrical signals, unfortunately they also carry mechanical energy which moves at its strongest in the opposite direction to the signal. Therefore, vibrations picked up and measured on a loudspeaker cabinet can be followed back to the source of the signal. Audio Physic has developed the Vibration Control Terminal in order to eliminate such unwanted vibrations. The massive aluminium construction is additionally damped and fitted with a neoprene gasket for elastic suspension ensuring that the binding posts are effectively decoupled from the cabinet.

Hyper-Holographic Cone Midrange Driver (HHCM)

Hard shell – soft core: an awesome midrange driver and exclusive design by Audio Physic!

It has been commonplace for many years to manufacture driver baskets consisting either of plastic or metal. However there is a well-known German proverb saying that double stitching lasts longer.

We took this to heart, doubled our efforts and designed the hyper-holographic cone midrange driver, HHCM in short, a novel basket construction using a combination of aluminium and plastic. Aluminium is stiff and conducts heat better than plastic material which, in turn, allows for a much higher internal damping. Both characteristics are important in loudspeaker manufacturing. Provided that the two materials are efficiently combined, their properties complement each other in such a way that damping of resonances is perfectly coupled with mechanical and thermal stability.

The two materials are used where they do their best in what they are best at doing. Moving parts such as the diaphragm, the surround, the centering device and the voice coil are held in proper alignment by a plastic inside basket designed to achieve a maximum degree of damping inside (marked in red in the illustration). The powerful neodymium magnet is encased in an outside basket made of die-cast aluminium.

Let us look at the advantages: the generated heat is efficiently dissipated by extensive cooling fins whereas remaining vibrations are transmitted to the mounting ring via slim stiff bridges.

Such a double-basket construction makes a lot of sense. Basket and cabinet resonances are effectively kept away from the driver diaphragm while at the same time the thermal behaviour of the midrange driver significantly improves.

Special attention is also given to the aluminium diaphragm itself which takes full advantage of Active Cone Damping II implemented to avoid ringing resonances frequently associated with stiff diaphragms. A U-shaped elastic ring is designed to fit snugly around the rim of the cone, causing the diaphragm to tighten. Therefore, resonances having an adverse effect on the sound quality can be prevented right from the start.

All these measures have only one goal in mind: to achieve a perfect marriage of ultimate resolution performance and absolute freedom from coloration.

In addition to achieving outstanding measurement results, the HHCM truly lives up to its name, reaching a superior subjective level of reproduction quality.

Never before has music been reproduced with such holographic quality!




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