"The key to a good performance is a good monitor!"

The SMX 12 and the active SMX 12A are compact, extremely versatile 2-way coaxial monitors in bass reflex design. Thanks to the built-in 12" LF with powerful 3" voice coil and a 1" HF with a 1.7" voice coil, both SMX monitors are powerful and assertive in any mix and feature a harmonious, neutral sound character. This allows users to hear themselves better and to bring out every nuance of their own performance. The clearly audible signal in a 60° x 60° dispersion angle is easy on any singer's voice – the louder they hear themselves, the less effort required to sing. All the while, the SMX monitors remain uncomplicated and feedback-resistant.

With a power handling of 1,600 W peak and 138 dB max. SPL (peak), the SMX 12 boasts an impressive stage presence, yet keeps distortion at an extremely low level over the entire frequency range from 60 Hz to 20 kHz. This makes it possible to use SMX monitors and subwoofers such as the S 15 PRO from the M-Line exclusively for small to medium-sized events, or for fixed installations. The elegant cable management – the connector panel is hidden on the underside of the box – ensures a neat and tidy appearance on stage or in other applications.

The SMX 12A boasts a 2-channel Class-D amplifier with a total power of 484 W (LF: 416 W @ 6.5 Ω, HF: 68 W @ 14 Ω) on board. So there is no need for an external device – the internal amp is optimally matched to the speakers and brings eight DSP Presets to make the set-up as short and simple as possible!

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SMX 12A 3

12" High efficiency woofer

SMX 12A is a compact yet powerful tool for various monitoring requirements on and off stage.

SMX 12A 4

8 intelligent DSP presets

Gain and a special preset selector with 8 practical factory settings increase the application range.

SMX 12A 5

Recessed connector panel

Due to the recessed I/O panel of the monitoring system, no connectors are visible to the viewer.

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SMX 12


SMX 12A 6
Frequency range (-3 dB): 65 Hz - 17 kHz
Frequency range (-10 dB): 60 Hz - 20 kHz
Coverage angles (-6dB) [H x V]: 60° x 60°
Maximum Peak SPL *: 129 dB
System type: 2-way coaxial system
Crossover frequency: 1.4 kHz
Transducers: Coaxial driver with:
LF: 1 x 12'' driver
HF: 1'' compression driver
Enclosure Type: Vented box
Type: 2 channel, class-D with SMPS
Total power **: 484 W
Output power (per channel): LF: 416 W @ 6.5 Ω
HF: 68 W @ 14 Ω
Protection: Short circuit, overheating, overcurrent, 2-band limiter
Connectors: Input Signal: balanced XLR 3-pin female or balanced 6.5 mm TS jack
Link output: balanced XLR 3-pin male
Power input: powerCON® 20A
Power link output: powerCON® 20A
Wiring: Pin N: Neutral
Pin L: Conductor
Pin E: Ground
Input sensitivity: 0 dBu
DSP: 48 kHz/24-bit with extended dynamics
Processing latency: 1.1 ms
Processing: Level, factory EQ presets
User controls: Power: ON/OFF switch
Level: 8-position rotary knob (-50, -20, -10, -4, -2, 0, +2, +4)
DSP presets: 8-position rotary knob
Product dimensions [H x W x D] (Including rigging): 368 x 450 x 575 mm
Net weight: 22 kg
Packaging dimensions [H x W x D]: 447 x 535 x 660 mm
Total weight: 25 kg
Cabinet: 15 mm plywood
Cabinet finishing: Black polyurea coating
Grille: Powder coated perforated steel
Hardware: 1 top and 2 side handles embedded in cabinet
Rubber Feet
2 x M10 for U-bracket mounting
Rigging: -
User controls: -
U-bracket: SMX 12UB
Pole bar: SPS20
M10 screw to 35mm pole socket: PS35
Transport cover: SMX 12TC
All product specifications are subject to change without prior notice. * Measured with 12 dB Crest factor Pink Noise, half space
** Total power value is the sum of all individual channel output power



This U-bracket provides mounting holes for wall mounting or pole support adapter PS35 or other industry-standard hardware, like truss clamp.


Distance bar/pole support to connect from M20 thread in subwoofers to PS35.


Pole support adapter, model PS35, M10 to 35 mm speaker poles.


SMX 12 transport and storage protection cover