ALD A7

The ALD A7 is a new loudspeaker based on the technology of the internationally awarded Aurelia Cerica XL, featuring further refined acoustic solutions. The A7’s redesigned triple-tweeter array enables a minimum-phase crossover design, ensuring exceptionally consistent acoustic phase behavior.

Unlike conventional loudspeakers, the A7 generates sound waves in a cylindrical shape using the triple-tweeter array and bass drivers arranged in a D'Appolito configuration. The A7 utilizes an acoustic design principle in which the dimensions of the bass drivers and the waveguide are harmonized with the wavelengths of the sound waves being produced. This maximizes acoustic radiation efficiency, thereby minimizing the power required to achieve a given sound pressure level. As a result, the energy response is smooth and directivity is well-controlled. We call this approach "Wave-Length Reasoning" (WLR).

Developed by Antti Louhivaara, HFD technology directs the sound toward the listener in a fan-like pattern. The horizontal acoustic fan created by the A7 resembles the fan-shaped spray produced by certain pressure washers. This acoustic fan—known as HFD (Horizontal Fan-shaped Dispersion)—enhances the precision of the soundstage and improves spatial coherence. HFD wave formation delivers significantly more direct sound to the listening position than traditional acoustic systems; as a result, the soundstage created by the speaker is exceptionally deep, precise, and immersive.

The A7 creates a kind of three-dimensional acoustic bubble at the listening position, within which an entirely new world of musical information unfolds.

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