Source: Press Release, Last Accessed: 2026/03/02

The EL50 Anniversary active 3-way tower is the latest evolution of ATC’s winning blueprint of the legendary ATC 50 loudspeaker design, featuring discrete active tri-amp technology, first deployed by the SCM70 in the 1990s and refined through the SCM50 Anniversary speaker in 2004 and the SE Series in 2014. Its industrial design draws from the EL150, released in 2006, the first ATC loudspeaker to employ an elliptical enclosure and designed by Billy Woodman. Leather detailing on the front face and beautiful hand-selected veneers further elevate the design.
According to the published details, the new model incorporates a new, proprietary 3-channel active “Amp-Pack”, featuring balanced input, user controls, active crossovers and three power amp channels, delivering 200W, 100W and 50W continuous power to the bass, mid and high-frequency channels, respectively. Within the first line level stages, new discrete gain blocks have been developed and implemented within a balanced instrumentation input and the fourth-order active crossovers to achieve a lower noise floor and reduce distortion. In addition, the power supply has been comprehensively re-designed and upgraded with individual toroidal transformers for each power amplifier channel, plus a separate transformer serving the low voltage supply. This topology improves headroom under demanding use and reduces intermodulation distortion between the channels to deliver greater clarity to the listener, the company says.
Building on previous development work, the EL50 Anniversary cabinet construction has been improved and updated via advanced in-house manufacturing technology to increase stiffness and internal damping, reducing cabinet-borne coloration in the upper-bass and mid-range. The bass driver is mounted into a precision turned aluminum ring which is bolted into the cabinet face, further increasing cabinet integrity. A curved cabinet face and edges create a smooth transition from the driver output into the room, reducing edge diffraction and producing a more uniform on and off-axis frequency response. The drive unit complement includes the SH25-76S “S-Spec” tweeter, the SM75-150S "Superdome” mid-range driver, and the SB75-234SL bass driver.
The EL50 Anniversary launches as an exclusive run of 50 pairs, each supplied with a hardbound owner’s handbook. The book celebrates ATC’s journey from its origin as a drive unit specialist in 1974 to its status as one of the world’s most highly respected loudspeaker manufacturers, revered by music lovers and audiophiles, and trusted by hundreds of international recording and mastering studios.

For more information: https://atc.audio/

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