Celsius Center plus

Very often, the importance of the center channel in a surround system is underestimated. This additional “middle channel” has developed from the history of ever larger, and thus widening, cinema palaces. In pure stereo mode, spectators sitting in the front ranks, far off center, almost solely heard the sounds from the speaker nearest to them, but hardly any sounds from the other side. Especially the intelligibility of dialogues suffered from this arrangement. How can you enjoy a movie if you don’t understand a single word? Smart sound engineers therefore established an additional sound channel for the middle area of the screen, the center channel. It was supposed to guarantee that dialogues became clear and comprehensible to the entire audience. And this is what our CELSIUS plus is about!

It’s especially the frequency spectrum of human voices where our sense of hearing is particularly sensitive; a good center speaker has to reproduce these frequencies in detail and without discolouration. So it was a logical conclusion to equip the CELSIUS plus with the best drivers around. The exclusive AUDIO PHYSIC HHC drivers assure for first-class playback quality and perfect speech intelligibility – even in very complex sound and film passages. Low and medium frequencies are handled by two HHCM II drivers, in order to have quiet passages performing sovereign and higher volumes sounding undistorted.


AUDIO PHYSIC uses the same driver types also in the STEP plus and TEMPO plus models. The identical configuration offers ideal conditions for an exemplary homogeneity.


In addition to this, the CELSIUS plus features also all other characteristics that we are accustomed to be standard in the TEMPO plus and the STEP plus, such as the inclined baffle or the mechanically from the speaker body decoupled connection terminal, equipped with high-quality WBT binding posts.


Whether you enjoy movies by means of a projector and a screen or using a flat-screen TV, the CELSIUS plus always cuts a fine figure. In a home cinema with projector, the black-cloth front grille reduces interfering light reflections on the speaker’s enclosure. In combination with flat-screens, the room ambience will therefore play a more important role, so the CELSIUS plus is available in various finishes.


145 mm / 5.7"
487 mm / 19.2"
300 mm / 11.8"
Required Space Width x Depth
490x330 mm / 19.3x13.0"
~ 4 kg
Recommended amplifier power
20-140 W
4 Ohm
Freqency range
44 Hz - 40 kHz
89 dB
Fabric Grill Black
2-Way Design

The 2-way speaker features two different drivers that share reproduction of the entire frequency range – one mid-woofer (in the case of center speakers, often two of them) and a tweeter. Usually the crossover frequency is set between 2,000Hz and 3,000Hz.

HHCT III – Hyper Holographic Cone Tweeter

Many AUDIO PHYSIC Core Technologies have been combined to build the HHCM-III tweeter. Together, they serve a single purpose: To guarantee an authentic rendition of the music, unaffected by any unwanted vibrations.


Ceramic Foam Bracing

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.


Dual Basket Design

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.



Active Cone Damping

ACTIVE CONE DAMPING is a unique design to reduce resonances in metal diaphragms, developed exclusively by AUDIO PHYSIC.


Aluminium Phase-Plug

All midrange drivers used in AUDIO PHYSIC speakers feature an aluminium phase plug mounted directly onto the motor system. This elaborate design has several advantages over conventional drivers.
Alle Mitteltöner von AUDIO PHYSIC verfügen über einen starr mit dem Magnetsystem verbundenen Phase Plug aus Aluminium. Diese aufwändige Konstruktion bringt gleich mehrere Vorteile mit sich.


CCAC – Ceramic Coated Aluminium Cone

By coating a conical aluminium diaphragm with a special ceramic material, AUDIO PHYSIC creates a diaphragm that is at the same time very light as well as extremely rigid. When used together with ACTIVE CONE DAMPING technology the cone diaphragm is virtually immune against any partial oscillations that would otherwise impair the sound.


VCF – Vibration Control Feet optional

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.

>> Further Information >>

VCT – Vibration Control Terminal

Unwanted vibrations have negative effects on sound quality wherever they occur in the signal path. Because AUDIO PHYSIC has made it their mission to fight unwanted vibration and resonance whenever and wherever they occur, the fully decoupled VIBRATION CONTROL TERMINAL (VCT) has been devised.