Diva 5

Indiana Line Diva 5 is a solidly designed and constructed 2.5-way speaker, inspired by earlier models in the series. However, the Diva 5, compared to its predecessors, incorporates many improvements that have resulted in a significant enhancement in the quality of the sound it reproduces. These changes include technical solutions, components used, and the loudspeaker’s finishing. When using a pair of Indiana Line Diva 5 floorstanding loudspeakers, we can effectively amplify a room with an area of up to approximately 25 m² while ensuring low-distortion sound.


SRP per item

Indiana Line Diva 5

The roots of the Indiana Line brand date back to 1977. Over the many years of its presence in the market, it has firmly established itself as one of the most important Italian brands in the audio industry. Indiana Line’s product offering primarily consists of loudspeakers and installation loudspeakers. The designers at Indiana Line consistently aim to blend the highest quality production with a rational use of components. The result are models that, in many ways, surpass speakers in a similar price range.

Diva – Top series in a New Version

Among all the Indiana Line models, the Diva series loudspeakers hold a special place. This flagship product line perfectly combines elegant design with solid craftsmanship and excellent sound quality. The models within the new Diva series feature mechanically and acoustically stable cabinets and a stylish finish. The front panel is painted with matte lacquer (white or black, depending on the color version), while the rest of the cabinet is covered with PVC veneer. Two color variants are available: a black body with a black front or an oak body with a white front.

Stylish cabinet with a tilted front

The Diva 5 column has a two-piece cabinet made of MDF. One of the parts is the 30 mm thick front panel, which increases the mechanical stability of the housing and prevents unwanted resonances, significantly improving sound clarity. The front is slightly tilted backward, with a shallower bottom and a deeper top, giving the column a noble look as it rests on solid cast aluminum legs. The attractive design of the Diva 5 is accentuated by the magnetically attached, acoustically transparent grille, which replaces the previously used plastic pins for attaching the cover, as seen in other Diva series columns.

Improved electroacoustic transducers

In the Diva 5 model, several changes have been made compared to the speakers available in the previous Diva series. Notably, the speaker baskets have been redesigned with more streamlined ribbing, reducing air resistance behind the membrane and minimizing unwanted resonances. These baskets have been purpose-designed to work seamlessly with the Dual-Wave suspension, resulting in both proper function and exceptional aesthetics.

Sophisticated Curv membranes

In the 2.5-way Diva 5 loudspeaker, both the woofer and mid-woofer feature Curv (polypropylene composite) membranes. This material choice in the woofer ensures more neutral and precise handling of low tones. These particular membranes are produced exclusively for Indiana Line on special order.

Computer-optimized parameters

The magnetic systems in the woofer and mid-woofer have been optimized through finite element analysis (FEA), aiming to enhance their performance across a wide range of amplitudes and frequencies. The magnetic cores of each transducer are highly saturated, reducing coil inductance and distortion, including intermodulation distortion. Furthermore, inductance is linearized, as in many previous Indiana Line models, using an Aluring demodulation ring. This element has been employed for both the low-midrange and woofer transducers, resulting in clearer and more articulate sound even at high volumes, regardless of the music genre being played.

Original design of the rubber surround

A unique feature introduced for the first time in Indiana Line loudspeakers is the Dual-Wave surround, present in both the woofer and midwoofer drivers of the Diva 5 model. This precisely designed upper suspension extends the linear operation range of the loudspeaker, reducing distortion, especially in the low bass registers, and improving midrange articulation. This has a positive impact, particularly on the sound of percussion, string, and acoustic instrumentsThe Dual-Wave solution also reduces irregularities in frequency response due to diaphragm edge resonance, without the need for additional lacquering. The visually attractive design of the Dual-Wave transducers resembles professional stereo equipment with so-called accordion suspension.

Precision silk-dome tweeter

Another new feature in the Indiana Line loudspeakers, compared to those currently available on the market, is the tweeter design. It incorporates a unique radial damping chamber in the form of a ring surrounding the coil, in contrast to the commonly used volume behind the dome. This design ensures natural high-frequency sound and helps avoid unwanted resonances often associated with conventional designs. The tweeter faceplate in the Diva 5 has also undergone significant changes, being cast from aluminum and featuring a optimally shaped rubber surface. These changes contribute to widening the soundstage and filling the room more effectively with high frequencies.

Computer-Optimized Crossover

The crossover used in the Diva 5 model has been redesigned and optimized using computer simulations. The circuit topology, the number of components, and their parameters have been precisely matched to the loudspeaker cabinet and transducers, resulting in a balanced frequency response, low distortion, reduced power losses, and sound quality that has been validated through extensive listening tests. The specially designed crossover circuit enables the Diva 5 to work seamlessly with virtually any amplifier.

Air Coils and Foil Capacitors

The tweeter filter system exclusively utilizes air coils and foil capacitors, eliminating the potential distortions often associated with electrolytic capacitors or ferrite core coils. In cases where core coils are used in the crossover, they feature a laminated high-silicon iron core to minimize iron core-related distortion.

Watch our movie

The most important features of the Diva 5 model:

  • 2,5-way floorstanding design
  • MDF cabinet with a tilted front
  • Magnetically attached black grille
  • Computer-optimized crossover design
  • Crossover frequencies: 400 Hz and 2,8 kHz
  • 150 mm midwoofer with Curv membrane
  • 150 mm woofer with Curv membrane
  • Dual-Wave – original design of the upper suspension of the woofer and midwoofer
  • 26 mm silk dome tweeter with radial damping chamber
  • Bass reflex cabinet with a port on the front
  • Frequency response: 40 Hz to 23 kHz
  • Finish: black or white matte lacquered front with black or wooden PVC coating
  • Suggested amplifier power: 30 – 130 W
  • Sensitivity: 90 dB (2,8 V/1 m)
  • Dimensions (H x W x D): 857 x 200 x 275 mm
  • Weight: 13,1 kg

Technical data

Speaker alignment / type

2,5-way / floorstanding

Box aligment / port placement

bass-reflex / front

Driver diameter

low-midrange: 1 x 150 mm, Curv polypropylene, woofer: 1 x 150 mm, Curv polipropylen, tweeter: 26 mm, silk dome

Frequency response

40 – 23000 Hz

Sensitivity (2,8 V/1 m)

90 dB


400 / 2800 Hz

Bi-wiring / bi-amping


Amplifier loading impedance

4 – 8 ohm

Suggested amplifier power

30 – 130 W

Dimensions (H x W x D)

857 x 200 x 275


black, white oak


13,1 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.

100% polyester damping

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.

Air coils and film capacitors


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.

Computer-optimized crossover design

Curv cone

Curv is a combination of special fibers with high stiffness and high internal damping. It is a material that is thermally formed into a cone profile, which ensures very good directional characteristics of the sound. The Curv cone combines the advantages of membranes made of natural materials (warm and pleasant sound) with the advantages of stiff membranes (high dynamics, precision and a wide, even frequency response). The membranes made of Curv material are also moisture-resistant and are characterized by high durability. The Curv cone has been used in the mid-woofers.

Curv cone

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.

Dual-Wave suspension

MDF housing with transverse reinforcements

Indiana Line loudspeakers cabinets are made of MDF panels. They are made using the latest production techniques, which ensures high precision of workmanship, great repeatability and excellent performance parameters for many years. MDF is a moisture-resistant material, it is massive and it suppresses all resonances very well. To completely remove unwanted vibrations, we used transverse reinforcements of the cabinet. They take the form of horizontal rings that are located at key points along the entire height of the loudspeaker cabinet.

MDF housing with transverse reinforcements


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 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.


Rubber tweeter faceplate

Original design of the tweeter's frontplate. It is cast from aluminum and has a rubber surface (instead of the commonly used plastic). Ensures proper treble dispersion. It helps to widen the sound stage and better fill the room with high frequencies.

Rubber tweeter faceplate

Tilted front

The front panel of the column is placed in the box in a unique way – it is slightly tilted back because it is embedded in the box – shallower at the bottom and deeper at the top. This solution is not used by other manufacturers in models offered in a similar price segment. The front panel also has a constant thickness, which varies depending on the Indiana Line loudspeaker model, up to 30 mm, which increases the mechanical stability of the loudspeaker and prevents unwanted vibrations, and also contributes to obtaining a transparent sound.

Tilted front

Indiana Line Diva 5 – product card_EN


New Diva - leaflet_EN


NEW DIVA 3 & 5 - owners manual