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ATC releases SCM25A Pro Mk2 active studio monitor

ATC announces upcoming availability of the SCM25A Pro Mk2 compact three-way active monitor - maintaining the core of its predecessor from which it evolved while refining key areas of design and performance, including replacing the original SCM25A Pro’s OEM (Original Equipment Manufacturer) high-frequency driver with the specialist British manufacturer’s own “S-Spec” SH25-76S soft-dome, dual-suspension tweeter.

The SCM25A Pro Mk2 is based around a 6.5’’/164 mm bass driver loaded in a ported/vented enclosure, tuned to 32 kHz and featuring a 3’’/75 mm diameter port with flared entry and exit to minimise port air noise.

The SCM25A Pro Mk2’s high-frequency driver is a 1’’/25 mm soft-dome design, handling high frequencies above 3.5 kHz, 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. 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.

Meanwhile, mid-band frequencies between 380 Hz and 3.5 kHz are handled by ATC’s 3’’/75 mm soft-dome mid-range driver. Mid- and high-frequency elements are supported by a 6.5’’/164 mm proprietary bass driver that takes care of the SCM25A Pro Mk2’s low frequencies below 380 Hz. This features a carbon-loaded paper cone while the driver motor employs a short-coil operating in a long magnetic gap, helping to minimise distortion generated by drive force modulation. Additionally, a 2’’/50 mm voice coil and generous excursion capability ensure the desired dynamic range.

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. Audio balanced input is via a rear panel-mounted three-pin XLR and power is via an IEC (International Electrotechnical Commission) mains power inlet. Input sensitivity and bass boost controls are also accessible to the user.

FET (Field-Effect Transistor) peak limiters are included to reduce amplifier “hard-clipping”, while Power/Limit is indicated - “on” and “active” - by a front panel-mounted bi-colour LED. The amplifier is designed and manufactured in-house, just like the speaker drive units.

(Photo: James Callaghan Photography)

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