LD Systems Mon 12A G3
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The essentials to know about the LD Systems MON 12 A G3 stage monitor
The essentials to know about the LD Systems MON 12 A G3 stage monitor
- 12"/1.75" coaxial transducer with a 50deg x 90deg constant-directivity horn for even cover and a true “point source”
- 300 W RMS / 1200 W peak Class D amplification, delivering up to 127 dB SPL to maintain headroom even on large stages
- DynX DSP (Gen.2) with 3-band EQ, notch filter, 4 presets and delay function for controlled sound
- Professional daisy-chain connectivity (XLR/6.35 mm jack, powerCON with link output), 35 mm pole mount and ultra-durable polyurea construction
Manufacturer Information
LD Systems
https://www.adamhall.com
info@adamhall.com
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Safety manager:
Adam Hall GmbH
Email: info@adamhall.com
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Essential Information on the LD Systems MON 12 A G3 Stage Monitor
- 12"/1.75" coaxial transducer with constant directivity horn 50deg x 90deg for even coverage and a true "point source"
- Class D amplification 300 W RMS / 1200 W peak, up to 127 dB SPL to maintain headroom even on large stages
- DynX DSP (Gen.2) with 3-band equalizer, notch filter, 4 presets, and delay function for controlled sound
- Professional cascade connectivity (XLR/6.35mm Jack, powerCON with loop-through), 35 mm pole mount, and ultra-durable polyurea construction
The MON G3 Series: Professional Expertise Made Accessible
With the MON G3 series, LD Systems brings high-end monitor solutions into an affordable and portable format. The MON 12 A G3 modernizes the classic "12"/1"" reference with a coaxial architecture and advanced digital processing, delivering faithful and stable reproduction at high levels both on stage and front of house.
Who is it for and what are its uses?
Ideal for singers, musicians, DJs, rental companies, and small venues, this 33deg angled wedge excels as a precise stage monitor but can also be used as a small front-of-house speaker thanks to its 35 mm pole mount. Its directivity of 50deg x 90deg (monitor) or 90deg x 50deg (front) ensures targeted and clean coverage, reducing spill and feedback risks.
Technical specifications
| Battery | No | Cutaway | Yes |
| Number of channels | 2 channels | Speaker structure | wood |
| Bluetooth | No | Inputs | combo XLR/jack |
| Speaker diameter | 1", 12" | Outputs | XLR |
| Number of speakers | 2 | Color | Black |
| EQ | Yes | Power output | 300 W |
| Product type | Stage monitors | Woofer/midrange diameter | 12 " |
| Type | Active | Woofer diameter | 304.8 mm |
| System power (RMS) | 300 W | Woofer magnet | Ferrite |
| System power (Peak) | 1200 W | Woofer brand | Custom |
| Max. SPL Average (Sine burst) | 120 dB (100 Hz - 12 kHz, fullspace @1m, 10% THD) | Loudspeaker type | Coaxial loudspeaker |
| Max. SPL Peak (Sine burst) | 127 dB (fullspace @1m, 10% THD) | Woofer voice coil | 2.5 " |
| Frequency response (-3 dB) | 68 - 18000 Hz | Woofer voice coil (mm) | 65 mm |
| Frequency response (-10 dB) | 55 - 20000 Hz | Cabinet finishing | Bass Reflex |
| Frequency response | 1400 Hz | Cabinet material | 15 mm birch plywood, 15 mm MDF panel |
| Monitor angle | 33deg | Horn type | Constant directivity (CD) |
| Dispersion angle (H x V) | 50deg x 90deg | Tweeter diameter | 1 " |
| Width | 425 mm | Tweeter diameter (mm) | 25.4 mm |
| Depth | 453 mm | Tweeter magnet | Ferrite |
| Height | 315 mm | Tweeter brand | Custom |
| Features | Delay Line, 3-band equalizer (High, Mid, Low), Notch filter | Tweeter voice coil | 1.75 " |
| Speaker pole socket | 35 mm | Tweeter voice coil (mm) | 44.45 mm |
| Coating | Polyurea, sturdy front grille | ||
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Questions frequently asked
Can the LD Systems Mon 12A G3 be used as a stage monitor for a vocalist?
Its 33° monitor angle and 50° x 90° dispersion focus the nearfield listening on stage. The 12-inch coaxial design with a 1.75-inch high-frequency driver promotes a coherent sound image.
What power and sound pressure level does this active monitor deliver?
The amplification provides 300 W RMS and 1200 W peak power. The maximum SPL reaches 127 dB peak at 1 m.
Can this speaker be used on a stand as a front-of-house speaker?
A 35 mm socket allows mounting on a speaker pole. In front-of-house position, the directivity is 90° x 50°.
What inputs and outputs are available?
One combo XLR/6.35 mm jack input receives the audio signal, while an XLR output allows sending the signal to another system component. The power pass-through uses a powerCON connector.
What DSP settings are integrated into the MON 12A G3?
The DynX Gen.2 DSP includes a 3-band equalizer (High, Mid, and Low), a notch filter, four application presets, and a delay. These settings allow adapting the sound to stage conditions. The specified frequency response ranges from 68 Hz to 18 kHz at -3 dB.
