ATC SCM25A Pro

ATC SCM25A Pro

Active 3-way Nearfield studio monitor

At the AES, ATC (Acoustic Transducer Company) introduced a compact, active, three-way studio control monitor, the SCM25A Pro. Designed for positioning on a meter bridge, or rack-mountable for broadcast applications, the ATC SCM25A Pro offers very high performance in a very compact form factor, producing a wide, stable soundfield with low coloration and low frequency extension down to 42Hz (-6dB).

The SCM25A Pro incorporates ATC’s short-coil, 7in carbon-paper woofer, a 3in soft dome midrange driver and a 1in silk dome tweeter in a ported enclosure that measures 10.4in x 16.9in x 16in. The integrated triamplifier generates 150W RMS for the woofer, 50W for the midrange and 25W for the tweeter. The passively cooled amp pack features FET limiting. The crossovers are all fourth order and critically damped with phase compensation.

ATC launch the ATC SCM25A, the company’s first compact 3-way active studio monitor loudspeaker. The loudspeaker aims to bring the performance of ATC’s well know larger models to a compact package, better suited to the smaller control room, production or broadcast suite.

As with all ATC products, acoustic performance has been the primary goal and the design uses drive units and amplifier technology from the larger SCM series loudspeakers.

The drive units all use large diameter, under-hung voice coils for excellent dynamic range and linearity. The mid-range dome is the company’s world renowned soft dome, and the bass driver is a hand built, in house, using a carbon-paper cone with high excursion capability.

On-board amplification is constructed around the company’s class A/B Mosfet output stage delivering 150W to the bass driver, 60W to the mid and 25W to the high frequency driver, with all three stages fed by 4th order critically damped crossover filters with phase compensation.

An added feature of the compact design is that it can be rack mounted using an optional rack mounting kit, making it ideally suited to broadcast and outside broadcast applications.

“We hope this new loudspeaker will be very well suited to applications requiring a small package but also requiring the high resolution and bass extension that comes with a larger 3-way design”, says Ben Lilly, R&D engineer at ATC. “The loudspeaker certainly performs over and above what you expect of its size, but without the uncontrolled low frequency response found with many compact designs. We hope this new loudspeaker will bring ATC performance to many more audio professionals who didn’t have the workspace suited to our larger products.”

Price for pair

Specifications

Drivers: HF 25mm soft dome, Mid 75mm soft dome, LF 6.5″/164mm short-coil carbon paper cone
Amplitude Linearity (±2dB): 74Hz-17kHz
Cut-off Frequencies (-6dB, free-standing): 47Hz-22kHz
Dispersion: ±80° Coherent Horizontal, ±10° Coherent Vertical
Max. Continuous SPL (1 metre): 109dB
Audio Input: Rear panel mounted female xlr (pin 2 +)
Input Sensitivity: 1V rms (ref. full output)
Input Sensitivity Trim: 0dB to -6dB/1V – 2V (continuously variable via rear panel trimmer)
Input Impedance: Balanced > 10kΩ
Amplifier Output Power: Bass 150W rms, Mid 60W rms, High 25W rms
Crossover Frequencies: 380Hz & 3.5Khz
Crossover Filters: 4th order critically damped with phase compensations
Low Frequency Boost: 0dB to +3dB at 40Hz (continuously variable via rear panel trimmer)
Overload Protection: Active FET momentary gain reduction
Dimensions (HxWxD): 264 x 430 x 369mm (10.4˝ x 16.9˝ x 14.5˝).  Handles add an 39mm/1.5″ to depth.
Weight: 30kg / 66lbs (per cabinet)