ATC Consumer Hifi SCM20A SL Classic (pair)

Product description

The SCM20ASL is a 2-way active stand-mount loudspeaker and is the ideal choice in modestly sized rooms where outstanding musical reproduction is the goal. Its sealed cabinet design ensures exceptionally well controlled bass, even in smaller spaces and/or when located close to walls. The bass driver, HF driver and amplifier are all designed and manufactured in-house by ATC and to the highest standards to form a system that can’t be matched by equivalent passive systems.

The bass driver is a 6”/150mm part with large 3”/75mm voice coil and short-coil (long-gap) motor assembly featuring ATC’s proprietary ‘SL’ motor technology which, reduces distortion in the upper bass and mid-range. High frequency reproduction is handled by an ATC 1”/25mm soft-dome part featuring a dual-suspension and very high energy 2.1 tesla motor.

Integrating the two drive units is a precision active crossover which feeds a pair of class A/B MOSFET power amplifiers. The crossover operates at line-level maximising efficiency, plus the inclusion of an all-pass-filter results in improved timing and tonal balance through the crossover region. One power amplifier is dedicated to each drive unit and their performance and power output is carefully tailored to the driver demands and the musical elements they reproduce.

The SCM20ASL cabinet features a combination of bracing for stiffness and damping to supress resonance and is available in a wide range of real wood veneers, satin black or white painted finishes and high gloss lacquers.

Key Features
• 150mm/6” ATC ‘Super Linear mid/bass driver loaded in a compact sealed cabinet.
• 25mm/1” ATC ‘S-Spec’ soft-dome dual-suspension HF driver.
• On-board ATC active 250W ‘Amp Pack’ module.
• Balanced input & 2nd order Linkwitz-Riley active crossovers.
• User adjustable input sensitivity & bass shelf controls.
• 2 x class A/B MOSFET amplifiers, 200W bass/mid & 50W high frequency.
• Hand-built in England.
• 6 year warranty.

Specifications (concise version*)
Acoustic Specifications
o Low Frequency Cut-off: 55Hz (-6dB, anechoic)
o High Frequency Cut-off: 25kHz (-6dB)
o Amplitude Linearity: 80Hz – 20kHz (+/- 2dB)
o Matched Response: +/-0.5dB
o Crossover Point: 2.2kHz
o Max SPL: 108dB continuous, 114dB peak (per pair, IEC Weighted Pink Noise, 1m, anechoic)

Electronic Specifications
o Balanced Input: 1 x Rear Panel Mounted Female XLR, pin 2 hot
o Input Impedance: 20kO (differential)
o Input Sensitivity: 2.2dBu/1Vrms for full power
o Input Sensitivity Control: -6dB switchable, -6dB variable. Total adjustment 2.2dBu/1Vrms to
14.2dBu/4Vrms
o Bass Shelf: -2dB to +3dB, switchable in 1dB steps
o Crossover Filters: 2nd Order Linkwitz-Riley
o Amplifier type: Grounded Source MOSFET, class A/B, convection cooled
o Output Power: Bass 200W (8O), H.F. 50W (8O)
o Mains Input: 220-230V or 115V, factory set.