ATC is delighted to introduce the EL50 Anniversary to audiophiles and music lovers seeking long-lasting high performance, design and engineering quality. It is the latest evolution of the legendary ATC 50 loudspeaker design, featuring ATCs discrete active tri-amp technology, renowned drive units and a new elliptical curved cabinet for optimal radiation from the mid and high-frequency drive units. 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.
 
Built around ATC's renowned active design ethos, revised and updated with a new discrete 3-Channel 350W Amplifier
ATC Precision hand-built drive units engineered for low distortion combined with high dynamic range
Elliptical cabinet for low diffraction, resulting in improved balance and stereo imaging
 
FEATURES
ELLIPTICAL CURVED CABINET FOR LOW DIFFRACTION
ATC 9”/234MM 'SL' BASS DRIVER
ATC 3”/75MM 'SUPERDOME' MID-RANGE AND 1”/25MM 'S-SPEC' TWEETER
ATC 3-CHANNEL DISCRETE 'AMP-PACK'
BALANCED INSTRUMENTATION INPUT COMBINING HIGH CMRR AND VERY LOW NOISE
4TH ORDER ACTIVE CROSSOVERS IMPLEMENTED WITH LOW-NOISE DISCRETE CIRCUITRY
MOSFET CLASS A-B POWER STAGES DELIVERING 200W BASS, 100W MID AND 50W HIGH-FREQUENCY
POWER ON/OFF TRIGGER INPUT AND LINK OUTPUT
DC OFFSET AND THERMAL AMP PROTECTION
 
Specifications
ACOUSTIC SPECIFICATIONS
Bass driver: SB75-234SL 8Ω
Mid driver: SM75-150S 16Ω
High Frequency Driver: SH25-76S 6Ω
Low Frequency Cut-off: 32Hz (-6dB anechoic)
High Frequency Cut-off: 25kHz (-6dB)
Matched Response: +/-0.5dB
Crossover Point: 380Hz & 3.5kHz
MaxSPL: 112dB (per pair, IEC Weighted Pink Noise, 1m, anechoic)
Sensitivity: -17.5dBu (85dBC, @1m, pink noise, per speaker, anechoic)
 
ELECTRONIC SPECIFICATIONS
Balanced Input: Rear panel mounted female XLR, pin 2 +ve
Input Impedance: 20kΩ
Input CMRR: >80dB (20Hz- 10kHz)
Input Sensitivity: 2.2dBu/1V or 8.2dBu/2V (switched, ref. full output)
Crossover Filters: 4th Order Linkwitz Riley
Amplifier type: Grounded Source MOSFET, class A/B, convection cooled (fan-less)
Output Power:
Bass:200W (8Ω, continuous average, 0.1%THD)
Mid: 100W (16Ω, continuous average, 0.1%THD)
HF: 50W (8Ω, continuous average, 0.1%THD)
THD+N: 0.0015% / -96dB (1kHz, 1dB below rated power, 90kHz BW)
Frequency Response: 8Hz-190kHz
Limiter: FET momentary gain reduction, all channels
Electronic amp protection: Amplifier d.c. offset and over-temperature (both indicated by rear panel LED)
Mains Input: 220-230V / 110-115V factory set. Please observe panel markings and labels!
Power Trigger Input/Link: 2 x rear panel mounted, Switchcraft L712RA
Power Consumption: Idle 77W / 105VA, 1/8th Power 240W / 315VA, Full Power 600W / 730VA
Heat Output: Idle 77W / 263BTU, 1/8th Power 184W / 628BTU, Full Power 250W / 853BTU
 
PHYSICAL SPECIFICATIONS
Net Weight: 63kg / 139lbs
Dimensions: HxWxD 1421x459x352mm 5515/16” x 181/16” x 13 7/8”