LD Systems LDS-MON15AG3W, 15" Powered Coaxial Stage Monitor - White

The LD Systems MON 15 A G3 W (MON15AG3W) is a 15-inch powered coaxial stage monitor in white, built for bands, houses of worship and production companies that need a loud, low-profile wedge. A Class D amplifier drives the coaxial driver with 300 W RMS (1200 W peak), reaching 122 dB average and 129 dB peak SPL with a frequency response of 58 Hz to 18 kHz at -3 dB. It is used as a floor wedge on loud stages, as a drum fill, or on its own as a compact front PA where a separate subwoofer is not practical.

How does the MON 15 A G3 W compare to the MON 12, MON 10 and MON 8?

All four white MON G3 wedges share the same 300 W RMS / 1200 W peak Class D amplifier, the same 50° x 90° CD horn and the same 33° monitor angle. What changes as you move up the range is cone area, low-end reach, maximum SPL and weight.

Model	Woofer	Max SPL (avg / peak)	Low end (-10 dB)	Crossover	Weight
MON 15 A G3 W (this monitor)	15"	122 / 129 dB	48 Hz	1300 Hz	23.15 kg (51 lb)
MON 12 A G3 W	12"	120 / 127 dB	55 Hz	1400 Hz	17.4 kg (38 lb)
MON 10 A G3 W	10"	118 / 126 dB	58 Hz	1700 Hz	15.21 kg (34 lb)
MON 8 A G3 W	8"	116 / 121 dB	59 Hz	2500 Hz	13.2 kg (29 lb)

If you already know one of the smaller wedges, these are the real differences:

• It reaches 58 Hz at -3 dB, against 68 Hz on the MON 12 A G3 W. That extra low-end reach is the reason LD Systems rates the 15 for stand-alone use as a compact front PA, and the reason it holds up as a drum fill.
• 2 dB more average and 2 dB more peak SPL than the MON 12. 122 dB / 129 dB against 120 dB / 127 dB. The amplifier is identical, so the extra output comes from the larger cone and the 3-inch voice coil, not from more power.
• The crossover sits at 1300 Hz, the lowest point in the range. The MON 12 crosses at 1400 Hz, the MON 10 at 1700 Hz and the MON 8 at 2500 Hz, so the 15 hands over to the compression driver earliest and keeps more of the vocal range on the horn.
• It is the largest and heaviest of the four. 505 x 340 x 517 mm and 23.15 kg (51 lb), against 17.4 kg (38 lb) for the MON 12. If wedges get carried up stairs every weekend, that is a real difference.
• Stepping up does not buy more power. Every model in the range is 300 W RMS / 1200 W peak. You are buying cone area and low-end extension, not amplifier watts.

Is the white MON 15 A G3 W different from the black MON 15 A G3?

Only the finish. LD Systems publishes identical figures for both: 300 W RMS / 1200 W peak, 122 dB average and 129 dB peak SPL, 58 Hz to 18 kHz at -3 dB, a 1300 Hz crossover, 505 x 340 x 517 mm and 23.15 kg. If the stage look does not call for white, the MON 15 A G3 in black is the same monitor and normally sells for less.

What does a coaxial driver change on a stage wedge?

It puts the high-frequency driver on the same axis as the woofer, so both arrive from a single point rather than from two sources a few inches apart. That matters more on a wedge than on a front-of-house cabinet, because the performer is standing roughly three feet away, inside the distance at which a conventional two-way box has properly blended its drivers. The MON 15 A G3 W pairs a 15-inch (381 mm) woofer on a 3-inch (75 mm) voice coil with a 1-inch compression driver carrying a 1.75-inch (44.45 mm) titanium diaphragm, firing through an integrated 50° x 90° constant-directivity horn.

What can the DynX DSP do?

It gives you four application presets, a 3-band EQ, a notch filter for feedback and a delay line, all set from the rear panel. Controls are an on/off switch and a single rotary/push encoder next to an LC display, so nothing needs a laptop or a phone app. The delay line compensates for distances of up to 10 m (33 ft), which is what you use when the wedge sits well back from the source you are time-aligning it to, or when the cabinet is working as a delay speaker rather than a monitor.

How do you run several monitors from one cable run?

Both the audio and the mains connections loop through the cabinet. There are two XLR / 6.3 mm jack combo inputs and two XLR line-thru outputs, so signal passes to the next wedge without a splitter, and the PowerCON-compatible inlet has a matching outlet for daisy-chaining power. Across a four-wedge stage that is one signal run and one power run rather than eight separate cables back to the rack.

Specifications

Model	LD Systems MON 15 A G3 W (MPN LDS-MON15AG3W(US))
Type	Powered 2-way coaxial stage monitor
Finish	White
Amplifier	Class D, 300 W RMS / 1200 W peak
Max SPL	122 dB average, 129 dB peak (sine burst, full space at 1 m, 10% THD)
Frequency response	58 Hz - 18 kHz (-3 dB); 48 Hz - 20 kHz (-10 dB)
Crossover frequency	1300 Hz
Dispersion (H x V)	50° x 90°, CD horn
Monitor angle	33°
Woofer	15" (381 mm) coaxial, 3" (75 mm) voice coil, ferrite magnet
HF driver	1" (25.4 mm) compression driver, 1.75" (44.45 mm) titanium diaphragm, ferrite magnet
DSP	DynX DSP (Gen. 2): 4 application presets, 3-band EQ (high / mid / low), notch filter, delay line to 10 m (33 ft)
Controls	On / off switch, rotary/push encoder, LC display
Inputs	2 x XLR / 6.3 mm jack combo
Outputs	2 x XLR line thru
Power connection	PowerCON compatible, loop-through in and out
Power supply	Switch-mode (SMPS), 100 - 240 V AC, 50 / 60 Hz
Power consumption	150 W
Fuse	T4AL 250 V
Cabinet	Bass reflex; 15 mm birch plywood and MDF, polyurea coating, steel grille
Dimensions (W x H x D)	505 x 340 x 517 mm (19.9 x 13.4 x 20.4 in)
Weight	23.15 kg (51 lb)

Common questions

Can I use it as a front PA on its own, without a subwoofer?
Yes. LD Systems rates the MON 15 A G3 W for stand-alone use as a compact front PA, and the 58 Hz (-3 dB) low-end reach is what makes that work. Material with sustained deep bass will still be better served by adding a sub, but for speech, acoustic sets and small band shows it covers the range on its own.

Does it have a cooling fan?
No. Cooling is passive, through a heat sink on the rear panel, so there is no fan noise to deal with in a quiet room or a recorded service.

What mains voltage does it run on?
100 to 240 V AC at 50 or 60 Hz, drawing 150 W, so the same cabinet works on US and international power without a voltage switch.

Is the white finish durable enough for touring?
It is a polyurea coating over a 15 mm birch plywood and MDF enclosure, with a steel grille across the front, which is the same construction LD Systems uses on the black models. White cabinets show scuffs sooner than black ones, so a padded cover is worth budgeting for if the monitors travel every week.

Not sure whether the 15 or the 12 is the right wedge for your stage? Get in touch and we will work it out with you. You can also browse all stage monitors or the full LD Systems range.