SCM20PSL CLASSIC
Passive 2-way stand-mount loudspeaker
The SCM20SL Classic is ATC’s flagship 2-way stand-mount loudspeaker. Ideal for modestly sized rooms where performance cannot be compromised.
ATC DRIVE UNITS
The loudspeaker is available in both PASSIVE and ACTIVE versions. Both versions employ ATC’s renowned drive units which are painstakingly designed and manufactured by ATC in the UK.
SEALED CABINET DESIGN
Its sealed cabinet design ensures precise timing and excellent low frequency output below the cut-off. The combination of ATC mid/bass and soft-dome tweeter delivers mid-range & high frequency of exceptional clarity and the driver component’s shared design philosophy ensures the parts work seamlessly together.

THIRTY-FIVE YEARS IN PRODUCTION
The SCM20PSL represents ATC’s highest performing 2-way, stand-mount, passive loudspeaker. The model has been in continuous production since 1990 and has evolved through four driver/crossover revisions into its current form. Music and audio aficionados worldwide enjoy its special combination of clarity, balance, mid-range detail in combination with classic styling.
HAND-MADE CROSSOVER AND BI-WIRE INPUTS
Its 2-way crossover network is hand-made by ATC using very high-quality film capacitors and ATC’s own air-cored inductors, employed for their lack of hysteresis and lower distortion. Input to the crossover is made via heavy duty bi-wire terminals.
AMPLIFIER PARTNERING
The loudspeaker is ideally paired with ATC pre/power/integrated amplifiers. However, their neutral fidelity, outstanding resolution and modest load impedance also ensures excellent compatibility with a very wide range of quality electronics.
CABINET CONSTRUCTION
The cabinet is constructed to be heavy and inert with a combination of bracing for stiffness and damping to suppress resonance. Bitumastic damping panels are deployed at critical positions to minimise cabinet colouration. It is available in a wide range of finishes.
ALSO AVAILABLE AS A TOWER
The SCM20PSL is also available as a floor-standing ‘tower’ model with identical performance in the form of the SCM20PSLT.
CABINET FINISHES
Natural










Gloss









Other veneers and finishes can also be supplied to special order.
SPECIFICATIONS
- Mid/Bass driver: 1 x 150mm/6″, SB75-150SL 8Ω
- High Frequency Driver: 1 x 25mm/1″, SH25-76S 6Ω
- Low Frequency Cut-off: 55Hz (-6dB, anechoic)
- High Frequency Cut-off: 25kHz (-6dB)
- Matched Response: +/-0.5dB
- Crossover Point: 2.2kHz
- MaxSPL: 108dB continuous, 114dB peak (per pair, IEC Weighted Pink Noise, 1m, anechoic)
- System Sensitivity: 85dB (1W @1m)
- Recommended Power Amplifier: 75W-300W
- Impedance: 8Ω nominal/5.5Ω minimum
- Net Weight: 16.9kg
- Dimensions: HxWxD 440 x 239 x 325.5mm






