Indiana Line Lira 6

There are products that represent an evolution, and products that mark a significant shift. The latter are rarer because they require substantial investment and represent a major gamble. The new Indiana Line Lira 6 undoubtedly fall into the second category. Anyone familiar with the history of the Italian brand—which later became Polish (Audio Klan)— knows full well that the Diva series (review of the Diva 6 here) has always occupied a top position in the catalog, representing the most refined offering compared to the successful Tesi series (review of the Tesi 6 here) and striving to combine high performance, elegance, and affordability. With this new generation, Indiana Line has decided to enter a new segment for itself, significantly raising its ambitions.

A highly sought-after piece of furniture

This is one of the most interesting aspects of the entire project. Indiana Line has chosen to move away from traditional designs in favor of a structure conceived not only for aesthetic reasons but also to improve the speaker’s acoustic performance. The structure is slightly tilted backward to align the sound emission points, and the walls are not parallel to eliminate standing waves. An aesthetic motif runs along the entire side, an engraving that starts at the bottom and extends along the speaker, giving it a slender profile. The shape ideally evokes that of a lyre, an element that inspired the entire product family; however, to be honest, the final result appears much more modern rather than tied to the iconography of the classical instrument, and above all, in our opinion, bears no resemblance whatsoever to the shape of the Roman lyre. Looking at the Diva 6, one perceives instead a contemporary stylistic approach, characterized by clean lines, balanced proportions, and well-integrated surfaces. These are speakers that manage to be elegant without appearing ostentatious and that blend easily into modern environments.

The cabinet is constructed from high-density MDF with an extra-thick front panel. The non-parallel side walls help reduce the formation of internal standing waves, while the structure is stiffened by black bamboo reinforcements, a material chosen for its high stiffness-to-damping ratio. The entire speaker is slightly tilted backward to improve the time alignment of the acoustic centers of the various transducers and facilitate a more precise reconstruction of the soundstage.

New speakers

The Indiana Line Lira 6 are three-way floorstanding speakers with a bass-reflex design, developed according to the Symbiotic Drive design concept, which involves the joint optimization of transducers, crossovers, and the enclosure as a single electroacoustic system. The goal is to achieve a linear frequency response, good temporal coherence between the drivers, and controlled dispersion in the listening environment. The high-frequency section is handled by a 28 mm tweeter with an aluminum-magnesium alloy dome, which we had already encountered in the Utah 8 (review here). Compared to traditional 25 mm tweeters, the larger radiating surface allows for better power handling and less diaphragm excursion at the same sound level. The motor uses a high-energy-density neodymium magnet and is equipped with copper short-circuit rings to reduce variations in the voice coil’s inductance and thus distortion. Behind the dome is a damped rear chamber that lowers the transducer’s resonance frequency and improves performance at the crossover point with the midrange. The tweeter also works with a waveguide integrated into the front panel, which helps to uniform its dispersion and improve acoustic alignment with the other speakers.