Opera Callas

With this new model in the Callas Series, Opera`s intention is to create at home the emotion and pleasure of listening to music: to provide a musical, focused, three-dimenionalsoundstage with the correct timbre, dynamics and detail - and to do this with no sense of listening fatigue. To achieve this goal new technical solutions have been researched and applied and every single aspect of the design was subjected to intense musical listening tests at Opera. The new Callas model use techniques and components which reflect the state-of-the-art in electro acoustic design, including not only cabinets, drive units and crossovers but also new devices as the frond doublet and the new Triplet rear radiating device. The sonic result is tonally correct, convincing, involving and most of all, enjoyable to listen to. The new Callas is elegant looking and beautifully finished and will discreetly enhance any room. 

Specifications

System:  Bookshelf and Stand – Bass Reflex , rear ducts Finishing: wood and hide

Number of Way:  Two ways with doublet + rear triplet

Front Sistem Loudspeakers: 

1 woofer 5” with magnesium cone, Excel Magnet, solid copper phase plug. Doublet:

2 tweeters with a 1” Sonotex dome, neodymium, ferrofluid, decompression chamber

Rear System:  Triplet: 3 tweeters (the same as front system) with grid

Frequency Response:  32 - 25000 Hz

Crossover:  On Printed Circuit Board

12 dB/octave for the woofers

18 dB/octave for the il front tweeter

12 dB/octave for the rear Triplet (2kHz high pass)

Crossover Frequency:  around 1500 Hz

Maximum Power (Long Term):  80 Watt RMS

Maximum Power (Short Term):  250 Watt RMS (no clipping)

Suggested Amplifier:  Starting From 10 Watt RMS

Sensibility:  86 dB/2,83 Volt/1 metre

Nominal Impedance:  4 ohm (Zmin >3,2 ohm)

Position within surroundings:  At least 50 cm from walls

Dimensions (H x W x D):  375 x 230 x 340 mm ( 14.8 x 9 x 13.4 in)

Weigth:  26 Kg  (57 lb)

Opera Quinta

The new Quinta continues with the outstanding scale and depth of its

predecessor and builds on it with the use of new drive units, crossover

and cabinet design. It’s a true full-range, dynamic loudspeaker that

relays anything from jazz trios to full scale symphonic music with

authority and detail, yet also delicacy.

Room Positioning

Opera Quinta is a floor standing loudspeaker. It is inadvisable to place

the loudspeaker in a corner, and the recommended distance from side

walls is at least 30cm. As always, the best position within the room

will be found while experimenting. Even though the reflex ports are

rear-mounted, it is sufficient to maintain a distance of just a few inches

between the rear of the loudspeaker and the rear wall.

System

The Opera Quinta differs from the previous model of the same name by

having a new cabinet, new components and new crossover. The cabinet

is slightly larger than before, with an internal volume of around 60 litres

and is divided into two chambers; the lower chamber, of roughly 40

litres houses two bass drivers. The upper chamber, of roughly 20 litres

houses the upper bass driver. The three reflex ports are mounted on the

loudspeaker`s rear panel. There are 4 gold plated terminal connectors

and the speaker is bi-wirable if required.

Components

All models of the Linea Classica Series use the same drive units; the one

inch tweeter (the same used in the Callas SP) is a silk dome unit, with

ferrofluid in the air gap and having a wide rear decompression chamber.

The qualities of this SEAS tweeter are well known and appreciated.

The woofer, also made by SEAS, was developed specially for this

line of loudspeakers. It is a 6.5 inch unit with 18cm chassis, 38mm

voice coil, aluminium diaphragm and rubber outer suspension. It has

a dynamic mass appreciably higher than the norm, and an impedance

of 4 ohm. Two copper rings are fitted above and below the T-shaped

pole piece, which both reduce distortion and stabilize the magnetic flux.

Finally, the bullet-shaped phase plug in ABS helps to dissipate heat

and overcomes compression effects associated with normal dust-caps.

It also improves emission at the high-frequency end of the unit`s range.

The cast chassis, of aerodynamic design, is fully open even beneath the

inner suspension.

System

The Opera Quinta differs from the previous model of the same name by

having a new cabinet, new components and new crossover. The cabinet

is slightly larger than before, with an internal volume of around 60 litres

and is divided into two chambers; the lower chamber, of roughly 40

litres houses two bass drivers. The upper chamber, of roughly 20 litres

houses the upper bass driver. The three reflex ports are mounted on the

loudspeaker`s rear panel. There are 4 gold plated terminal connectors

and the speaker is bi-wirable if required.

Crossover

In designing the new Classic Series, particular attention has been paid

to electrical impedance.

This is to ensure that the loudspeaker will present a load compatible

with every type of amplifier.

The minimum impedance for a nominally 6 Ohm loudspeaker under

DIN regulations is not less than 4.8 Ohms at the lowest point of the

impedance curve. Opera Quinta adhere to this norm.

The electrical impedance curve of the Opera Quinta is in fact always

above 5.9 Ohm (5.54 Ohm real impedance at 20KhZ) and although

not completely resistive, it is extremely regular with phase rotations

close to zero over a wide range of frequencies from 200Hz upwards.

This ease of drive makes the Opera Quinta a rarer breed, opposed to

prevailing tendencies in loudspeaker design.

The Opera Quinta is a very easy loudspeaker to drive, and best

results can be achieved with any type of amplifier, whether valve or

solid-state.

The crossover of the Opera Quinta is a `two-and-a-half-way`, with

three bass units connected in quasi-series

Cabinet

All Linea Classica models have their cabinets in shaped MDF, with

sides veneered and lacquered using real wood, while the remaining

sides are finished in leather. The size of the front panel, following

Opera’s tradition, is large enough to hold the loudspeakers. The inside

of the cabinet is divided into two separate chambers, which not only

reinforces the structure but also raises the frequency of the first normal

resonance mode. The inside of the cabinet is filled with quality acrylic

wadding, which helps eliminate internal reflections and resonance and

assists bass frequency damping. The bass reflex ports are placed on

the rear panel.

System:

Floorstanding column two separated reflex loaded chambers

Drive units:

3 x 6.5 inch bass drivers - aluminium cone

1 x 1 inch tweeter - fabric dome

Number of ways:

2 1/2 way

Frequency response:

30-20000 Hz

Cross-over: low pass:

Nearly-series for woofers 6 dB low pass

24 dB/octave for the high pass

Crossover frequency 2300 Hz approx

Power handling:

210 watt RMS

Recommended amplifier:

10 to 210 Watt RMS or more (without clipping)

Sensitivity:

89 dB/1watt/1 meter

Nominal Impedance:

6 ohm (8 max and 5.95 min from 100 to 20000 Hz with)

Room positioning:

At least 20-30 cm from rear room boundary

At least 20-30 cm from side room boundary

Dimension (H x W x D):

1175 x 240 x 395 mm (46,3 x 9,5 x 15,5 inch)

Weight:

34 Kg (75 lbs)

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 CROSS -LINK- DIPOLE
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 CABINETS
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.

EASY POSITIONING IN YOUR ROOM
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.