Active 3-Way Tri-Amplified System
The ATC EL50 Anniversary employs a discrete active tri-amp architecture with separate internal amplifiers for the bass, midrange and high-frequency drivers. This allows the crossover to operate at line level before amplification, improving driver control, phase coherence and dynamic precision. The proprietary 3-channel “Amp-Pack” delivers continuous power outputs of approximately 200 W (bass), 100 W (midrange) and 50 W (high frequency).
Drivers and Crossover
All drive units are designed and manufactured in-house by ATC. The speaker features a 234 mm (9″) Super Linear (SB75-234SL) bass driver, a 75 mm (3″) Superdome (SM75-150S) midrange driver and a 25 mm (1″) S-Spec tweeter with a powerful neodymium motor. The active fourth-order crossover network is implemented with low-noise discrete circuitry for accurate band separation and minimal distortion.
Cabinet Design and Finish
The EL50 Anniversary features an elliptical curved cabinet designed to reduce diffraction and provide more uniform dispersion. Its multi-layer laminated construction enhances rigidity and internal damping to minimise unwanted colouration. The cabinet is clad in hand-selected European walnut veneers with ebony inlays and a high-gloss polyester lacquer, accented with fine grain Napa leather around the midrange and tweeter areas.
Connectivity and Controls
As a fully active system, the EL50 Anniversary is driven from a line-level source or pre-amplifier. The rear panel offers balanced XLR inputs with selectable input sensitivity for improved source matching. Additional features include a 12 V trigger input, link outputs and onboard thermal and DC offset fault protection.
Specifications
| Type | Active 3-Way Floorstanding Loudspeaker |
|---|---|
| Amplification | Tri-Amplified Active Electronics (200 W Bass, 100 W Mid, 50 W HF) |
| Low Frequency Driver | ATC SB75-234SL Super Linear Bass (9″) |
| Midrange Driver | ATC SM75-150S Superdome (3″) |
| Tweeter | ATC SH25-76S S-Spec (1″) |
| Crossovers | Active Fourth-Order Discrete Design |
| Inputs | Balanced XLR |
| Cabinet | Elliptical Curved Laminated Construction |
Limited Edition Release
The EL50 Anniversary is initially produced in a limited run of 50 pairs, each supplied with a hardbound owner’s handbook celebrating ATC’s heritage dating back to its founding in 1974. Following the limited edition release, ongoing production is expected.
Summary
The ATC EL50 Anniversary active floorstanding loudspeaker unites discrete active electronics, precision in-house drivers and refined acoustic engineering in a cohesive system. Built to deliver detailed, controlled and articulate performance across the audible spectrum, it represents ATC’s latest evolution of its long-standing 50 series design for serious two-channel listening environments.