LD Systems MON 12 A G3 12" Powered Coaxial Stage Monitor
LD Systems - MON 12 A G3 12" Powered Coaxial Stage Monitor, 300 W RMS/1200 W Peak and 127 dB Max. SPL
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12" Powered Coaxial Stage Monitor
LD Systems - MON 12 A G3
Compact high-performance stage monitor with top-of-the-range technologiesThe MON 12 A G3 is part of an entirely newly developed family of powered stage monitors for high performance. The MON G3 Series incorporates the advanced technology and premium materials found in high-end monitors typically rented by professionals, making this quality available to everyone. These include, for example, advanced coaxial loudspeakers with integrated 50° x 90° CD horn, which ensure the acoustic ideal of a true point source and thus outstanding audio characteristics even at short listening distances. Besides this, the series offers a high-level of robustness, a comprehensive set of features and the elegant LD Systems design.
For decades, 12"/1" stage monitors have been the golden mean when it comes to sonority, sound pressure and portability. With coaxial design, smart electronics and a professional look, the MON 12 A G3 brings this concept into the "modern age". The ideal dispersion geometry of 50° x 90° for monitor use or 90° x 50° for FOH use make it a multi-talent that offers the right solution for a wealth of different tasks.
Both the signal (XLR/jack combo) and the power connection (PowerCON compatible) can be looped through. This allows for elegant, tidy cabling in multi-monitor set-ups or for distributed sound reinforcement.
1200 WPeak Output Power
68 Hz - 18000 HzFrequency Response (-3 dB, rel. Avg)
127 dBMax. SPL Peak
at a glance
• Coaxial design for true point source with a 1.75" titanium-diaphragm HF driver
• Optimised, practical radiation pattern due to 50° x 90° CD horn
• 3-band EQ, Notch filter, 4 application presets and delay function
• 35 mm speaker stand flange for FOH applications
• Class-D power amplifier with 300 W RMS/1200 W peak and 127 dB max. SPL
• 12" woofer with 2.5" voice coil
• DynX® DSP (Gen.2) for distortion-free sound even at maximum volume
• PowerCON compatible loop-through professional power connection
• Durable Polyurea coating and heavy-duty front grille
Feature Highlights
DYNX DSP (GEN. 2)The latest generation of LD Systems’ proprietary DynX DSP guarantees a dynamic, high-resolution sound image across the entire frequency response.
DELAY LINE FUNCTIONThe delay line function allows you to compensate for distances of up to 10 m / 33 ft. This is very useful when operating multiple loudspeakers in FOH mode, for example at a town festival.
4 SOUND PRESETS & 3-BAND EQThe four intuitively operated sound presets and the 3-band EQ enable quick, user-friendly sound adjustment.
TUNABLE NOTCH FILTERWith the tunable notch filter, feedback frequencies can be quickly eliminated.
EASY DAISY CHAININGThe next monitor can be supplied with power via a second PowerCon compatible connection. Thanks to the two XLR outputs, you can also daisy chain the audio signal to a neighbouring stage monitor.
high-efficiency power amplifierThe highly efficient Class D power amp delivers 300 watts RMS. The peak power of 1200 watts, which can be called up at short notice, guarantees a dynamic, assertive sound image.
Introducing the LD Systems MON G3 Series – Completely Redesigned and One Step Beyond

The Tech Spec
| Features | Specification | Type (active/passive) | Active |
|---|---|
| Peak output power | 1200 W |
| RMS output power | 300 W |
| Amp class | Class D |
| SysLink® | No |
| Max. SPL peak (sine burst, fullspace/1 m, THD≤10 %) | 127 dB |
| Max. SPL average (sine burst, BW, fullspace/1 m, THD≤10 %) | 120 dB |
| Frequency response (-3 dB, rel. Avg) | 68 Hz - 18000 Hz |
| Frequency response (-10 dB, rel. Avg) | 55 Hz - 20000 Hz |
| Speaker system | 2-way coaxial system |
| Crossover frequency | 1400 Hz |
| Dispersion | Hor.: 50° / Vert.: 90° |
| Monitor angle | 33 ° |
| Number of inputs | 2 |
| Input connector types | XLR combo socket, 6.3 mm Jack TRS female |
| Number of outputs | 2 |
| Output connector types | XLR 3-pole female |
| Protection features | Multiband Limiter, Overheating, Overload, Overvoltage |
| Colour | Black |
| Dimensions | Width: 425 mm Height: 315 mm Depth: 453 mm |
| Weight | 17.4 kg |
PayPal Credit
| Monthly Payment: | £51.64 |
| Instalment Rate: | 16.9% p.a. (fixed) |
| Cost of purchase: | £569.99 |
| Total inc. interest: | £619.70 |
| Monthly Payment: | £27.84 |
| Instalment Rate: | 16.9% p.a. (fixed) |
| Cost of purchase: | £569.99 |
| Total inc. interest: | £667.91 |
| Monthly Payment: | £19.96 |
| Instalment Rate: | 16.9% p.a. (fixed) |
| Cost of purchase: | £569.99 |
| Total inc. interest: | £718.54 |
| Example | |
| Minimum Spend: | £99 |
| Instalment Rate: | N/A |
| Cost of purchase: | £99 |
| Total inc. interest: | £99 |
Representative Example:
Purchase Rate: 23.9% p.a. (variable)
Representative: 23.9% APR (variable)
Assumed Credit Limit: £1,200
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