Tesi 2

The Tesi 2 speaker is the smaller of the two bookshelf designs in the new generation Tesi series by Indiana Line. Inspired by the Tesi 241 model, it incorporates numerous improvements that result in unexpectedly dynamic sound, free from resonances. The Tesi 2 is not only suitable as a home theatre effect speaker but excels primarily in compact stereo systems, surprising listeners with its potential despite its modest dimensions.

Indiana Line Tesi 2

The Tesi 2 is the smallest speaker column among all those introduced in the new iteration of the Tesi series by Indiana Line. Despite its compact size, it performs exceptionally well in any audio system, providing engaging, balanced, and dynamic sound. Like other models in the Tesi line, the Tesi 2 features innovative technical solutions and components directly borrowed from the acclaimed Diva series. The Indiana Line Tesi 2 is available in three colour options – black oak, white, and mocha.

Universal, simple form

The Tesi 2 model has an appropriately reinforced MDF enclosure while maintaining a simple and versatile form. The dimensions of the speaker remain unchanged compared to its predecessor. The bass reflex port, located at the back of the column, just like in the Tesi 241, allows emphasizing low-frequency playback if needed (by placing closer to the wall). A new addition is the trim ring covering the mid-woofer driver basket. The Tesi 2 also features a magnetically attached grille. The overall design is complemented by the gently rounded upper edges of the enclosure, emphasizing the universal appearance of the speaker.

The new front panel of the tweeter

The high-frequency transducer in the Tesi 2 features a 26 mm diameter, a radial damping chamber, and a powerful neodymium magnet. Compared to the Tesi 241 model, the front shape of the tweeter has been modified. Instead of being round, it is now rectangular, reminiscent of the top constructions from the Diva line of the Indiana Line brand. The front of the Tesi 2 speaker column, however, has been executed in a simpler, fully-smooth mounting technique, providing proper dispersion of sopranos. The applied front design enhances the visual harmony between the tweeter and the mounted low-midrange speaker below, simultaneously elevating the aesthetic qualities of the Tesi 2 model.

Improved midwoofer

The 2-way system utilizes a low-midrange transducer with a 12 cm diameter polypropylene-mica composite membrane. The midwoofer has been optimized using modern design methods, featuring a larger and stronger magnet compared to the one used in the Tesi 241. One of the key components of the low-midrange transducer is the inductance linearizing ring. Additionally, the dust cap on the membrane deserves attention, replacing the phase corrector known from the Tesi 241 model and other constructions of the previous Tesi series generation. The components used contribute to achieving a low level of distortion and improved dynamics of the low-frequency range. As a result, the bass is clear and deep, and the sound is more articulate and richer in details, even at high volumes. This can be quite surprising given the compact dimensions of the speaker.

Dual-Wave suspension

In the midwoofer of the Tesi 2 model, an innovative Dual-Wave suspension has been implemented, visually reminiscent of stage speakers with accordion-like suspensions. This solution is introduced in the new generation of the Diva series. The Dual-Wave suspension was developed to extend the linear operating range of the low-midrange transducer and minimize intermodulation distortion, especially in the low registers. This enhancement also translates into improved clarity in the midrange frequencies, particularly noticeable during the reproduction of percussion, acoustic, and string instrument sounds.

Enhanced crossover design

The speaker crossover in the stand-mounted Tesi 2 column has been improved compared to the one used in the Tesi 241 model. It has been optimized using modern design methods and specialized measurement systems. The topology of the crossover is inspired by solutions already known in the new models belonging to the Diva line of the Indiana Line brand. Designers maintained the same quality of components, ensuring a smooth impedance characteristic, high efficiency, low distortion levels, and effective sound dispersion. These features enable the compact Tesi 2 to seamlessly collaborate with virtually any amplifier, including within a stereo mini-system.

The most important features of the Tesi 2 model:

2-way acoustical design
Magnetically attached grille

Optimised crossover design
Crossover frequency: 2.4 kHz

Reinforced MDF cabinet
120 mm midwoofer

Enlarged and improved magnetic circuits, with impedance linearizing rings
Dual-Wave – proprietary upper suspension design for midwoofer membrane

26 mm tweeter with Radial Venting Chamber technology
Bass reflex enclosure with port at the back of the speaker

Frequency response: 55 Hz to 22 kHz
Available colours: white, black oak or mocha

Suggested amplifier power: 30 – 80 W
Sensitivity: 90 dB (2.8 V/1 m)

Dimensions (H x W x D): 245 x 140 x 180 mm
Weight: 3 kg

Technical data

Speaker alignment / type: 2-way / bookshelf
Box aligment / port placement: bass-reflex / back
Driver diameter: midwoofer: 1 x 120 mm, mica-polypropylene cone, tweeter: 26 mm, textile dome
Frequency response: 55 – 22000 Hz
Sensitivity (2,8 V/1 m): 90 dB
Crossover: 2400 Hz
Bi-wiring / bi-amping: no
Amplifier loading impedance: 4 – 8 ohm
Suggested amplifier power: 30 – 80 W
Dimensions (H x W x D): 245 × 140 ×180
Color: black, white, mocha
Weight: 3 kg

100% polyester damping

All Indiana Line cabinets are filled with polyester – a synthetic non-woven fabric of high purity, known for its excellent damping of the internal resonances of the speaker cabinets. What's more, polyester is also extremely resistant to stretching, drying and moisture.

Air coils and film capacitors

In order to emphasize the exceptionally clear and natural sound of our loudspeakers, we decided to get rid of the troublesome components from the crossover where it was necessary – in the tweeter filter. In all loudspeaker models in which this filter is used, we use only air coils and foil capacitors. These elements do not introduce harmful distortions to the filtered signal, as is the case with ferrite core coils and electrolytic capacitors.

Aluring

The short-circuit ring is made of pure, perfectly electrically conductive aluminum (1010). It has been placed inside the magnetic system of the mid-woofer. By linearizing the impedance of the loudspeaker, it positively influences the sound of the low and medium frequencies of the acoustic band, significantly reducing non-linear distortions. The ring also absorbs the heat emitted from the speaker coil, increasing its thermal load capacity.

Computer-optimized crossover design

The use of numerical calculations allowed for obtaining a balanced frequency response and low level of distortion, as well as reducing power losses. The obtained sound results were verified by many hours of listening tests. The tweeter filter circuit uses only air coils and foil capacitors. This allowed to avoid distortions that often appear in the case of electrolytic capacitors or coils with a ferrite core. Core coils, when present in a crossover, have a laminated high-silicon iron core, which minimizes distortion from the iron cores.

Dual-Wave suspension

The Dual-Wave upper spring is an original, precisely designed membrane suspension that expands the range of linear operation of the loudspeaker. It reduces distortion, especially in the low bass registers, and improves the articulation of the midrange of the acoustic band. This translates into improved sound of instruments, especially percussion, string and acoustic ones. Thanks to the Dual-Wave solution, unevenness of the frequency response, which results from the resonance of the membrane edge, is also reduced, without the need to varnish it. Dual-Wave suspension drivers also have an eye-pleasing appearance that refers to professional designs used, among others, on stages and equipped with the so-called accordion springs.

Mica-poly cone

Universal and extremely popular polypropylene is a valued material, often used for speaker membranes. However, in order to ensure the most faithful transmission of micro-details, we decided to further increase the stiffness of the cone. We achieved this by doping polypropylene with a mineral called mica. This shiny, hard material significantly improves the parameters of the membrane, guaranteeing the transducer a long and reliable operation, and at the same time giving it an attractive appearance.

Radialvent

A radial damping chamber that prevents harmful reflections under the tweeter dome while allowing it to achieve a low resonance frequency. The small, but at the same time strong, neodymium magnet of the tweeter is surrounded by a space in which – due to its shape – standing waves cannot be generated, which is the case with classic radial chambers located in the axis of the dome.

Indiana Line New Tesi – owner's manual

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