LD Systems MON 12 A G3 Powered Coaxial Stage Monitor PA Speaker (1x12")

Hear better, play better. The LD Systems MON 12 A G3 powered coaxial stage monitor delivers clear, phase-aligned audio for fatigue-free monitoring.

The LD Systems MON 12 A G3 is part of a family of powered stage monitors designed 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.


- Compact high-performance stage monitor with top-of-the-range technologies
- Class-D power amplifier with 300 W RMS/1200 W peak and 127 dB max. SPL
- Coaxial design for true point source with a 1.75" titanium-diaphragm HF read more driver
- 12" woofer with 2.5" voice coil
- Optimised, practical radiation pattern due to 50* x 90* CD horn
- DynX(R) DSP (Gen.2) for distortion-free sound even at maximum volume
- 3-band EQ, Notch filter, 4 application presets and delay function
- PowerCON compatible loop-through professional power connection
- 35 mm speaker stand flange for FOH applications
- Durable Polyurea coating and heavy-duty front grille
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- Product type: Stage monitors
- Type: Powered
- Color: Black
- System output (RMS): 300 W
- System output (Peak): 1200 W
- Max. SPL Average (Sine burst): 120 dB (100 Hz - 12 kHz, fullspace @1m, 10% THD)
- Max. SPL Peak (Sine burst): 127 dB (fullspace @1m, 10% THD)
- Frequency response (-3 dB): 68 - 18000 HZ
- Frequency response (-10 dB): 55 - 20000 Hz
- Crossover frequency: 1400 Hz
- Monitor angle: 33*
- Dispersion (H x V): 50* x 90*
- Width: 425 mm
- Depth: 453 mm
- Height: 315 mm
- Features: 3-band EQ (High, Mid, Low), Delay line, Notch filter
- Weight: 17,4 kg

Low/mid woofer
- Low/mid Woofer dimensions: 12"
- Woofer dimensions (mm): 304.8 mm
- Woofer magnet: Ferrite
- Woofer brand: Custom-made
- Woofer type: Coaxial loudspeaker
- Woofer voice coil: 2.5"
- Woofer voice coil (mm): 65 mm
- Cabinet construction: Bass Reflex
- Cabinet material: 15 mm Birch Plywood, 15 mm MDF

- Horn: CD Horn
- Tweeter dimensions: 1"
- Tweeter dimensions (mm):25.4 mm
- Tweeter magnet: Ferrite
- Tweeter brand: Custom-made
- Tweeter voice coil: 1.75"
- Tweeter voice coil (mm) : 44.45 mm

Amplifier module (integrated)
- Amplifier: Class D
- Protection circuits: Multiband limiter, over voltage, over-current, thermal overload
- Operating Temperature: 0 - 40 *C
- Humidity Range: < 80 % ( non-condensing )
- Fuse: T4AL 250 V
- Controls: On / off switch, Rotary/push encoder
- Indicators: LC display
- Operating voltage: SMPS
- Operating voltage: 100 V AC - 240 V AC, 50 - 60 Hz
- Power consumption: 150 W
- Power in / out: PowerCON compatible
- Line inputs : 2
- Line input connectors: 6.3 mm jack, XLR - combo
- Line thru: 2
- Line through connector: XL
Dimensions and Weight in Packaging
Base Item
Shipping Weight: 48.95 lbs
Shipping Dimensions: 23 x 22 x 17 in
Manufacturer Part Number (MPN): LDS-MON12AG3(US)
Scratch and Dent
Shipping Weight: 48.95 lbs
Shipping Dimensions: 23 x 22 x 17 in
Manufacturer Part Number (MPN): LDS-MON12AG3(US)
Shipping Weight: 48.5 lbs
Shipping Dimensions: 22 x 22 x 17 in
Manufacturer Part Number (MPN): LDS-MON12AG3(US)

For support or warranty questions, please contact the manufacturer:
Phone: 973-335-7888 x 207
Email: service.us@adamhall.com

Reviewers gave this product an overall rating of 2 out of 5 stars. (1 ratings)
Submitted October 10, 2023 by a customer from worryfreesolutions.net

"Tried These for Live Sound"

Overall: 2 out of 5 stars
(see rating details)
Verified Customer zZounds has verified that this reviewer made a purchase from us.
I purchased a pair of these in the hopes of replacing my existing monitors. I compared these with my Mackie Thump 12A and a Turbosound 12" monitor. The Thump and Mackie were vastly louder than the LD.I took them to a sound gig with 2 Mackie Thumps and made sure the stage was quiet. The monitors sounded great but were too underpowered. On a loud stage there is no way these could be heard.LD needs to rework these to have more power than 300 watts.I love the design, but these just won't work for my needs.
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