Skip to content


Your cart is empty

ATC SCM20ASL Limited Edition Active Loudspeakers

Sale price£10,500.00
1 in stock

Pickup also available at Doug Brady HiFi

Usually ready in 1 hour

ATC SCM20ASL Limited Edition Active Loudspeakers

ATC SCM20ASL Limited Edition Active Loudspeakers

High Gloss Blue lacquer

Doug Brady HiFi

Pickup also available, usually ready in 1 hour

Kingsway Studios
Kingsway North
Warrington WA1 3NU
United Kingdom


In celebration of the beginning of our 50th Anniversary, ATC has announced the release of an exclusive new active stand mount loudspeaker, the SCM20ASL Limited Edition.

Limited to just 150 pairs, the 2-way active stand-mount design is finished in a stunning high gloss lacquer in the ATC company dark blue. Complementing the cabinet, the front baffle is hand-upholstered in royal blue full-grain Napa leather by German leather specialists Eissmann. The exterior alloy components feature a silver anodised finish in striking contrast to the blue lacquer and leather of the cabinet and baffle. 

Key Features

  • Compact sealed cabinet finished in high-gloss blue with leather upholstered baffle
  • On-board ATC active 250W ‘Amp Pack’ module
  • 2nd order Linkwitz-Riley active crossovers
  • 2 x class A/B MOSFET amplifiers, 200W bass/mid & 50W high frequency
  • User adjustable input sensitivity & bass shelf controls
  • Hand-built in England
  • 6 year warranty

The SCM20ASL Limited Edition continues ATC’s philosophy of combining the best in-house loudspeaker drive units with matched on-board active amplification for optimal fidelity. The new model integrates a 2-way active system, previously only available in a floor standing model, into a smaller stand-mount cabinet. The SCM20ASL Limited Edition features ATC’s proprietary 150mm/6” ‘Super Linear’ Mid/Bass driver paired with a 25mm/1” ‘S-Spec’ dual-suspension tweeter.

The bass driver operates in a 20-litre sealed cabinet and power is provided by on-board class A/B MOSFET power amplifiers, capable of delivering 200W and 50W continuous power to the bass and HF drivers respectively. The loudspeaker crossovers are active, analogue 2nd order Linkwitz-Riley and an all-pass filter is included to optimise the phase response through the crossover region, resulting in far improved tonal balance and imaging.

Input to the loudspeaker is via balanced XLR, located on the rear panel and there are user controls for input sensitivity and low frequency shelf cut/boost.  The input sensitivity control allows the user to tailor the input gain to suit their source/pre-amplifier combination, resulting in more consistent performance.  The low frequency shelf control gives the user the option to subtly adjust the bass response to suit their room and/or their personal taste.  The speaker is supplied with a removable grille, wrapped in dark blue acoustically transparent cloth.

Only 150 pairs of the SCM20ASL LE and 20 partnering C4 Sub Mk2 subs will be manufactured

UK stock allocation is limited to just 10 pairs. (we have secured just three pairs)

Call to reserve 01925 828 009 

Acoustic Specifications

Bass/mid 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)
Crossover Point 2.2kHz
MaxSPL 108dB continuous, 114dB peak (per pair, IEC Weighted Pink Noise, 1m, anechoic)
Sensitivity +4dBu rev 95dBC (Bass Boost 0dB, Input Sensitivity 1V, Pink noise)


Electronic Specifications

Balanced Input 1 x Rear Panel Mounted Female XLR, pin 2 hot
Input Impedance 20kΩ (differential)
Input CMRR >60dB (10kHz)
Input Sensitivity 2.2dBu/1Vrms for full power
Input Sensitivity Control

6dB switchable, -6dB variable. Total adjustment 2.2dBu/1Vrms to14.2dBu/4Vrms

Bass Shelf -2dB to +3dB, switchable in 1dB steps
Crossover Filters 2nd Order Linkwitz Riley
Amplifier type Grounded Source MOSFET, class A/B, convection cooled
Output Power Bass 200W (8Ω), H.F. 50W (8Ω)
THD+N <0.0017%/-95dB (1kHz, 1dB below rated power, 90kHz BW)
Frequency Response <2Hz to >200kHz (-3dB)
Limiter ATC Active FET Momentary Gain Reduction
Electronic amp protection Amplifier d.c. offset and over-temperature (both indicated by rear panel LED)
Mains Input 220-230V or 115V, factory set. Please observe rear panel markings and labels!
Power Consumption Idle 26W/41VA, 1/8th Power 116W/161VA, Full Power 312W/398VA
Heat Output Idle 89BTU/hr, 1/8th Power 311BTU/hr, Full Power 382BTU/hr


Physical Specifications

Net Weight 27kgs/59.5lbs
Dimensions (H x W x D) 450mm x 250mm x 425mm
Gross Weight 31.3kg / 68.9lbs
Carton Dimensions (LxWxH): 56 x 38 x 60cm / 22 x 15 x 23 ½ inches (each)


ATC SCM20ASL Limited Edition Active Loudspeakers
ATC SCM20ASL Limited Edition Active Loudspeakers Sale price£10,500.00