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ATC SCM50A SL Classic - Boekenplak Speakers
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The SCM50 ASL is designed to perform at their best in the recording studio or at home with the finest quality hi-fi equipment. The monitors' ability to reproduce music and speech with phenomenal accuracy, transparency and dynamics lies mainly in the SM75-150S soft dome midrange driver. However, recent modifications that include an upgraded tweeter and enhanced port profile have brought about further improvements in all performance parameters. Each drive unit in the active model has its own dedicated and individually matched MOS-FET amplifier, while the 234mm/9" bass driver incorporates ATC's unique Super Linear Magnet technology. Our active crossover network consists of a wide band-width, electronically balanced input stage with high common mode rejection and very low distortion. Like the mid and bass drivers, all electronics are designed and manufactured in-house to create a no-compromise active system. In passive form, the SCM50 SL provides broad and symmetrical dispersion, excellent amplitude and phase characteristics throughout the frequency range.
 
 
Active versus Passive
 
Active amplification has many advantages:
- Real active amplification means using a dedicated amplifier for each frequency band. Not to be confused by having one broad band amplifier built into the loudspeaker cabinet whilst still using passive crossovers.
- Active crossover filters (at the input of the amplifier) with phase correction ensure accurate timbre, excellent imaging and source location
- A flat magnitude response that is not changed with power input level results in excellent linear behaviour
- A 20dB improvement in intermodulation distortion (IMD). Reducing IMD is one of the major design goals when designing a loudspeaker system.
- Better controlled low frequency (due to optimal damping by the amplifier)
- A greater dynamic range for the same input power (no losses caused by a passive filter)
Specificaties
SCM50ASL
Drivers: HF 25mm Mid 75mm LF 234mm Super Linear
Amplitude Linearity ±2dB: 70Hz – 17kHz
Frequency Response -6dB: 38Hz & 22kHz
Matched Response: ±0.5dB
Dispersion: ±80° Coherent Horizontal ±10° Coherent Vertical
Max continuous SPL @1m: 112dB SPL
Crossover Frequency: 380Hz & 3.5kHz
Input Connector: XLR
Input Sensitivity:1V
Input Impedance: >10k ohms balanced XLR
Amplifier Output: HF 50 Watts RMS MF 100 Watts RMS LF 200 Watts RMS
Overload Protection: LDR tweeter protection, plus active FET MGR (amplifiers)
Power Requirements: Voltage: 100, 115, 230 (factory set)
Frequency: 50/60Hz
Power: Nominal 90 Watts, Driven 350 Watts
Cabinet Dimensions(HxWxD): 717 x 304 x 480mm including amps (stands add 250mm to height)
Weight: 48.9kg