What is stereo?

There are now two system of high fidelity, monophonic (monaural) and stereophonic. Monophonic is a system that starts from one microphone and is fed through a single high fidelity set. Stereophonic is a double system. Two separate microphones are placed at different sides of the orchestra and two different systems are used to keep the two signals or channels separated. Two separate speakers are used, placed on different sides of you room. Stereo is much like 3-D photography, two slightly different sound reach your ears giving you a new dimension in sound.

H.H. Scott '59

OPERA Lirica Tebaldi

With the new Tebaldi loudspeaker, Opera`s intention is to recreate within the homeenvironment all the emotion and pleasure of listening to music: to provide a stable andfocused musical soundstage in three dimensions with correct timbre, dynamics and detail, and to do this with no sense of listening fatigue. To achieve this goal, every single technical aspect of the design was subjected to intensemusical listening tests at Opera. The new Tebaldi loudspeaker uses techniques and components which reflect the state-of-the-art inelectroacoustic design, including controlled-diffraction cabinets, drive units and crossovers andnow also the innovative CLD (Cross-Link-Dipole). Every type of distorsion has been analysed,quantified and reduced. The sonic result is tonally correct, convincing, involving and most of all,enjoyable to listen to. The Tebaldi loudspeaker is elegant and beautifully finished, and willdiscreetly enhance any room.
The aim of the Tebaldi is to recreate a precise soundstage which is stable and correct in itsproportions and in the dimensions and weight of each instrument or voice. The innovativeCLD (Cross-Link-Dipole) adds even more detail and depth to the sound stage.On the rear of the Tebaldi cabinet are mounted 4 high quality treble units, connected to form apair of rear-firing dipoles which are high-pass filtered above 2 kHz. By this means thereflected sound field is enhanced in the area close to the source (just as in Classical GreekTheatre). The entire listening experience thus gains additional depth, detail and realism.
The cabinet is made in a mix of MDF and plywood, with curved sides, veneered and finelylacquered in the best Italian tradition. The front baffle is only 16 centimeters wide yet fully 5centimeters thick, and is finished in real leather. The internal volume is divided into foursealed enclosures: two are for the sub-woofers with their associated passive radiators, one isfor the two mid-woofers and the fourth is for the external gold connections.Internally there are a number of interlocked braces which serve to increase the rigidity across the cabinet.The mid-woofers’ enclosure is completely filled with acoustic absorbing materials whichcancel standing waves and mask reflections also make the sound radiation isothermal.

Tebaldi’ s woofers are placed in an unusual position: they are all on the same side of thecabinet, facing inwards. In this way most of the energy in the low frequency region isprovided by the large cabinet itself and very little depends upon reflection from sideroom-boundaries. This gives the Tebaldi the notable advantage of easy room placement,unusual for a loudspeaker of its size.Because the mid-bass response is less dependent on loudspeaker positioning, you can selectthe cross-over frequency at 160 or 200 Hz (with 6 dB/octave slope) to match your preferencein mid-low frequency band reproduction.

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