Audio balanced input is via a rear panel-mounted three-pin XLR and power is via an IEC (International Electrotechnical Commission) mains power inlet.
#Scm25a pro pro
Rear-mounted, a three-way class A/B amp actively drives the SCM25A Pro Mk2 with each drive unit having its own dedicated power amplifier. Additionally, a large 2"/50mm voice coil and generous excursion capability ensure outstanding dynamic range.
#Scm25a pro driver
This features a carbon-loaded paper cone while the driver motor employs a short-coil operating in a long magnetic gap, helping to minimize distortion generated by drive force modulation. Mid- and high-frequency elements are supported by a 6.5"/164mm proprietary bass driver that takes care of the SCM25A Pro Mk2's low frequencies below 380Hz. As a mainstay of ATC's Pro product range, this component features in eight models, making certain consistency spans from nearfield through to main monitors. Mid-band frequencies between 380Hz and 3.5kHz are handled by ATC's acclaimed 3"/75mm soft-dome mid-range driver, duly combining high-efficiency, high-power handling, low distortion, and wide dispersion characteristics to ensure class-leading performance for the SCM25A Pro Mk2 in this critical frequency range. This, therefore, makes for a narrower magnetic gap, resulting in higher magnetic flux, which, in turn, extends the high-frequency response and reduces 3rd harmonic distortion.
This driver is a 1"/25mm soft-dome design, handling high frequencies above 3.5kHz, but, unlike almost any other 1"/25mm tweeter on the market, it employs both an upper and lower suspension to better support and control the coil and dome motion. Its killer combination of exceptional mid-range clarity high-output, extended bass response and modest 25-litre/0.9 cubic foot size make it ideal for nearfield monitoring across a wide range of critical applications.Īll new to the SCM25A Pro Mk2 is its high-frequency driver, ATC having replaced its popular predecessor’s OEM part with its own 'S-SPEC' SH25-76S, manufactured in-house with a no-compromise engineering approach (as fitted to the two-way SCM20A Pro and larger, three-way SCM45A Pro, SCM50A Pro, SCM100A Pro, SCM110A Pro, and SCM150A Pro models since 2015).
#Scm25a pro drivers
Both the mid-range and bass drivers are unchanged.As a compact, three-way, high-performance active studio monitor, the SCM25A Pro Mk2 is based around a 6.5"/164mm bass driver loaded in a ported/vented enclosure, tuned to 32kHz and featuring a 3"/75mm diameter port with flared entry and exit to minimise port air noise. The rear panel is near identical, with no change to I/O connectivity or layout. Phew! Beyond that there’s very little difference between the two models, with the only physical difference being a slightly modified enclosure (to accommodate the new tweeter housing) resulting in a marginal difference in height (271 vs 264mm), Depth (411mm vs 369mm) and weight (25.1kg vs 24.5kg). In layman terms, this translates to more power (30W rms vs the MK1’s 25W), an extended high-frequency response well beyond 20kHz, wider horizontal dispersion (no small feat considering the already superb sound staging of the MK1), lower distortion and a broader sweet-spot with improved off-axis response. In the words of ATC: “Unlike almost any other 25mm tweeter on the market the SH25-76S is a dual suspension design which ensures pistonic motion, suppressing anharmonic rocking modug, even at high drive levels, and enables the use of narrower magnetic gapsA very narrow magnetic gap for unparalleled linearity and low distortion throughout its wide operating band.” The new ATC SCM25a MKII now employs ATC’s own proprietary SH25-76S “dual suspension” high-frequency driver – the same tweeter found in the larger SCM45a Pro, favoured for it’s smooth, detailed and open sound. Not so much a radical overhaul (nor should it be), but a small-but-not-insignificant upgrade. A mere 14 years later, ATC have announced the SCM25a Pro MKII.
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