The SCM25A Pro Mk2 is a compact 3-way high-performance studio monitor loudspeaker, based around a 6 . 5 ” / 16 4 mm bass driver and a 25-litre
vented cabinet. The monitor’s combination of exceptional mid-range clarity, high-output, extended bass response and modest size make it ideal
for nearfield monitoring across a wide range of critical applications.
For situations requiring wall/ceiling mounted monitoring speakers, an install variant, the SCM25Ai Pro Mk2 is available. It’s performance matches
that of the nearfield version but it features a steel reinforced cabinet and 4 x M8 mounting points in the rear face for safe and simple mounting
using a range of widely available third-party brackets. The install variant is driven by a remote mounted version of the SCM25A Pro Mk2 amplifier
with 1, 2 and 3 channel versions available.
The 3-way monitors both feature proprietary drive units designed and manufactured by ATC. Low frequencies <380Hz are handled by a
6 . 5 ” / 16 4 mm bass driver, mid-range frequencies between 380Hz & 3.5kHz by the ATC 3”/75mm soft dome mid-driver. High frequencies >3.5kHz
are handled by ATC’s SH25-76S Dual-Suspension 1”/25mm tweeter. This HF driver update is the primary improvement from the Mk1-to-Mk2 model.
The enclosure is a vented type, tuned to 32Hz and featuring a 3”/75mm diameter vent with flared entry & exit to minimise port air turbulence.
The SCM25A Pro Mk2 is actively driven by a 3-way class A/B amp pack mounted in the rear of the cabinet. Each drive unit has its own dedicated
power amplifier. Audio input is via a rear panel mounted 3-pin female XLR and power via an IEC mains power inlet. There are user controls for
input sensitivity and bass ‘boost’. Crossovers are 4th order Linkwitz-Riley and all-pass filters are included to optimise the phase response through
the crossover regions, improving the tonal accuracy, imaging, on and off-axis frequency response. FET peak limiters are included to reduce amp
‘hard-clipping’. Power ‘on’ and limiter ‘active’ is indicated by a front panel mounted bi-colour LED.
The SCM25Ai Pro Mk2 is also actively driven but the amplifiers are remote rack mount using a 5U /19” chassis. Three remote amp options are
available: R1-234 Pro (1-channel), R2-234 Pro (2-channel), R3-234 Pro (3-channel). Amp-to-speaker audio connectivity is via Neutrik NL8 speaker
cable. Amp-to-speaker power/limit LED connections are made via 5-pin XLR (male-male).
Product Description
2 .1
SECTION TWO
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