Germany

Founded in December 1982 by Bernhard Mörtl, ATL Lautsprecher GmbH Vertriebsgesellschaft emerged as a strong player in the audio equipment industry. The company initially acquired the inventory of Atlantic Lautsprecher GmbH, where Mörtl previously served as Sales Manager, and entered into a revenue-sharing collaboration with acoustic researcher Hans Deutsch.

Known for its unique technical innovations, ATL's speakers often featured the "Hornresonator," a specialized form of the bass reflex principle. This unique technology allowed air mass at a narrow outlet to act as a membrane, whose vibrations were amplified by a short horn at the reflex opening. Coupled with this was the concept of an "acoustically active crossover," a set of mechanical filters and housing specifications designed to separate frequency ranges effectively.

In 1989, after an initial dip in sales and a halt in new developments from Hans Deutsch, the company rebranded as ATL Elektro-Akustik Vertriebs GmbH, with Klaus Dotter stepping in as the Chief Developer. Dotter's influence led to a transition from the signature Hornresonator to a more conventional bass reflex principle and Scandinavian woofers with PP membranes. The speakers were categorized into a 700 series, with the high-end models known as the "Pro-Line," characterized by their premium finishes and beveled edges.

Through the years, ATL introduced several other lines, including the design-oriented "Avantgarde" and the ultra-slim "Slim-Line" series, which stood out for its narrow front panel and side-mounted woofers. However, despite being Germany's fourth-largest speaker manufacturer at its peak, the company ceased operations in 1994.

While ATL’s original journey concluded, the brand's legacy in innovation and quality remains a fascinating chapter in the history of audio engineering. The mark ATL left on the industry, from its unique Hornresonator to its collaboration with prominent figures like Hans Deutsch and Klaus Dotter, makes it an indelible part of audiophile lore.

The ATL 715 Pro is a 4-way bass reflex floorstanding loudspeaker manufactured by ATL between 1989 and 1993. It features multiple driver configurations that enhance sound quality across a vast frequency range. The speaker includes a low-frequency driver made of 215 mm polypropylene, a low-midrange driver with a 133 mm polypropylene cone, and two tweeters: a 25 mm and a 38 mm aluminium dome tweeter. This speaker delivers a power handling capacity of 140 watts nominally and can handle up to 180 watts in music playback. With an efficiency rating of 93.5 dB, it allows for effective sound performance in various listening environments. The frequency response ranges from 20 Hz to 22,000 Hz, maintaining a ± 3 dB variation, and the transitional ranges are set at 280 Hz, 1,200 Hz, and 4,500 Hz. The ATL 715 Pro has an impedance of 4 Ohm. The speaker is available in a variety of finishes, including 170 RAL colors and various veneers, enabling aesthetic customization to fit different interior designs. Its dimensions are 275 mm in width, 1050 mm in height, and 395 mm in depth, making it a substantial option for audio enthusiasts.

715 Pro

by ATL

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