DATASHEET ULTRA
MM-4XP Miniature Loudspeaker
Meyer Sound designed the MM‑4XP self‑powered miniature
loudspeaker (with IntelligentDC technology) for high‑quality
distributed systems. Housed in a compact aluminum enclosure,
the MM‑4XP is especially suitable for installations involving space
limitations and visibility concerns, such as fill and spot coverage,
and hidden locations like chancel steps in houses of worship. Its
flexible and easy‑to‑configure mounting options, as well as its
ability to effortlessly reproduce both speech and music, make it
an excellent choice for fixed applications, theatrical presentations
(stage lip frontfill), and small portable systems for corporate AV.
The MM‑4XP’s proprietary 4‑inch cone transducer with on‑board
amplification and signal processing, manufactured at Meyer
Sound’s Berkeley, California factory, delivers an impressive
linear peak SPL of 111.5 dB with crest factor >16.5 dB
3
and a
wide operating frequency range of 120 Hz to 18 kHz with very
low distortion. The MM‑4XP exhibits the same high intelligibility
and flat frequency and phase responses for which all Meyer
Sound loudspeakers are known. Peak and rms limiters regulate
loudspeaker temperatures and excursion, ensuring the MM‑4XP
performs exceedingly well even when driven into overload.
With IntelligentDC technology, the MM‑4XP receives power
and balanced audio from a SwitchCraft
®
EN3™ 5‑pin male input
connector on its rear panel. The sealed EN3 connector provides
protection against harsh environmental conditions for outdoor
installations of the MM‑4XP. Meyer Sound designed the MM‑4XP’s
amplifier and signal‑processing circuits to store DC power and
tolerate voltage drops, thereby accommodating light‑gauge cables
and long cable runs.
MM‑4XP loudspeakers require a Meyer Sound external power
supply. The compatible MM‑10 ACX miniature self‑powered
subwoofer includes on‑board DC power and audio routing for
4.04
[103 mm]
4.04
[103 mm]
3.99
[101 mm]
2.25
[57 mm]
2.75
[70 mm]
7.98
[203 mm]
5.72
[145 mm]
4.04
[103 mm]
driving a pair of MM‑4XP miniature loudspeakers. The MPS‑488HP
IntelligentDC power supply is ideal for larger installations
with multiple loudspeakers; the single‑space rack‑mount unit
distributes DC power and balanced audio to up to eight MM‑4XP
loudspeakers or other compatible Meyer Sound low‑voltage
loudspeakers. Another option is the 1RU, 1/2 width rack‑mount
MPS‑482HP IntelligentDC power supply that offers two channels
of audio and DC power.
Meyer Sound’s RMS™ remote monitoring system, which provides
comprehensive monitoring of system parameters from a Mac
or Windows®‑based computer, is available as an option for the
MPS‑488HP.
The Meyer Sound power supplies can deliver DC power to
MM‑4XP loudspeakers at cable lengths up to 300 feet with just
1dB of loss in peak SPL using 18 AWG wire. The use of composite
multi‑conductor cables (such as Belden
®
1502 or equivalent)
allows a single cable to carry both DC power and balanced audio
to the MM‑4XP. Longer cable lengths are possible for moderate
applications that do not drive the loudspeakers to maximum
output, or for installations with heavier gauge wire. Powering the
MM‑4XP from a unipolar external power source reduces induced
noise significantly and eliminates the need for wiring conduits.
For information and specifications about the Meyer Sound power
supplies, refer to their respective datasheets.
The MM‑4XP’s extruded aluminum enclosure acts as a heat sink
to dissipate heat from the driver’s voice coil. The enclosure is
available in a black‑anodized or standard white‑painted finish and
includes a perforated steel grille frame. The enclosure can also
be custom painted to match specific color schemes. The optional
MUB‑MM4XP U‑bracket facilitates mounting of the loudspeaker
on walls and ceilings at adjustable angles.
®
FEATURES AND BENEFITS
• Extremely compact enclosure
• Self‑powered
• Wide‑range frequency response
• Ultra‑low distortion
• Effortless reproduction of both speech and music
• Exceptional SPL to size ratio
• Support for long cable runs with light‑gauge cables
APPLICATIONS
• Fill and spot coverage for systems with space limitations and visibility concerns
• High‑quality distributed systems in clubs and restaurants for paging and music
• Small, portable systems for corporate audio‑visual
• Sound installations for gallery exhibits and museum displays
ACCESSORIES AND ASSOCIATED PRODUCTS
MUB-MM4XP Mounting U-Bracket: Allows the MM‑4XP to be mounted on any flat surface at adjustable angles (includes mounting hardware).
Galileo GALAXY Network Platform: The Galileo GALAXY Network Platform provides state‑of‑the‑art audio control technology for loudspeaker
systems with multiple zones. With immaculate sonic performance, it provides a powerful tool set for corrective room equalization and creative fine‑
tuning for a full range of applications.
MPS-488HP External Power Supply: Rack‑mount unit that delivers balanced audio and high‑current DC power to up to eight loudspeakers; versions
available with either Phoenix or EN3 channel output connectors.
MPS-482HP External Power Supply: 1RU 1/2 width rack unit that delivers balanced audio and high‑current DC power to up to two audio channels;
optional accessories for rack, wall, ceiling, pole, or truss mounting.
MUB-MM4XP Mounting
U-Bracket
GALAXY Network Platform MPS-488HP External Power
Supply
MPS-482HP External Power
Supply
SPECIFICATIONS
ACOUSTICAL
1
COVERAGE
TRANSDUCERS
AUDIO INPUT
Operating Frequency Range2120 Hz – 18 kHz
Frequency Response
3
135 Hz – 17 kHz ±4 dB
Phase Response 400 Hz – 20 kHz ±45°
Linear Peak SPL
4
111.5 dB with crest factor >16.5 dB (M-noise), 109 dB (Pink noise), 111 dB (B‑noise)
Horizontal Coverage 80° (3 kHz – 14 kHz ±10°); 120° (below 2 kHz)
Vertical Coverage 80° (3 kHz – 14 kHz ±10°); 120° (below 2 kHz)
One 4‑inch cone driver; 4 Ω nominal impedance
Type Differential, electronically balanced
Maximum Common Mode Range ±5 V DC
Connector SwitchCraft EN3 5‑pin male (two pins for 48 V DC power, three pins for balanced audio)
Input Impedance 10 kΩ electronically balanced
Pin 1: DC power (–)
Pin 2: DC power (+)
Wiring
Pin 3: Audio shield, chassis/earth
Pin 4: Audio (‑)
Pin 5: Audio (+)
Nominal Input Sensitivity –2.5 dBV (0.75 V rms) continuous average is typically the onset of limiting for noise and music
AMPLIFIER
DC POWER
PHYSICAL
Input Level
Audio source must be capable of producing +16 dBV (6.3 V rms) into 50 Ω to produce the maximum
peak SPL over the operating bandwidth of the loudspeaker
Type Class‑D
Total Output Power
5
440 W peak
THD, IM, TIM < 0.02%
Cooling Convection
6
Connector SwitchCraft EN3 5‑pin male (two pins for 48 V DC power, three pins for balanced audio)
Safety Agency Rated Voltage
7
48 V DC
Dimensions W: 4.04 in (103 mm) x H: 4.04 in (103 mm) x D: 5.72 in (145 mm)
Weight 4.2 lb (1.9 kg)
Enclosure Sealed extruded aluminum with standard white‑painted or a black‑anodized finish
Protective Grille Perforated steel
Mounting Two 0.375 in‑16 side inserts; optional MUB‑MM4XP U‑bracket
NOTES
1. Loudspeaker system predictions for coverage and SPL are available in Meyer Sound’s MAPP System Design Tool.
2. Recommended maximum operating frequency range. Response depends on loading conditions and room acoustics.
3. Free field, measured with 1/3 octave frequency resolution at 4 m.
4. Linear Peak SPL is measured in free field at 4 m referred to 1 m. Loudspeaker SPL compression measured with M‑noise at the onset of limiting,
2‑hour duration, and 50‑degree C ambient temperature is < 2 dB.
M-noise is a full bandwidth (10 Hz–22.5 kHz) test signal developed by Meyer Sound to better measure the loudspeaker’s music performance.
It has a constant instantaneous peak level in octave bands, a crest factor that increases with frequency, and a full bandwidth Peak to RMS
ratio of 18 dB. The presence of a greater‑than (>) symbol with regard to crest factor indicates it may be higher depending on EQ and boundary
loading.
Pink noise is a full bandwidth test signal with Peak to RMS ratio of 12.5 dB.
B-noise is a Meyer Sound test signal used to ensure measurements reflect system behavior when reproducing the most common input spectrum,
and to verify there is still headroom over pink noise.
5. Amplifier wattage rating based on the maximum unclipped burst sine‑wave rms voltage the amplifier will produce for at least 0.5 seconds into the
nominal load impedance: 30 V rms (42 V peak).
6. Meyer Sound power supply required; for information about and specifications for Meyer Sound IntelligentDC external power supplies, refer to their
datasheets.
7. Tolerates voltage drops (due to long cable runs ) of up to 30percent.
ARCHITECTURAL SPECIFICATIONS
The loudspeaker shall be self‑powered and include a single 4‑inch
(103mm) diameter cone transducer with a 4 Ω, long‑excursion voice coil.
The loudspeaker shall incorporate a class‑D power amplifier with a burst
capability of 220W total (440Wpeak) into a nominal load of 4 Ω. Distortion
(THD, IM, TIM) shall not exceed 0.02 percent.
Performance specifications for a typical production unit shall be as follows:
operating frequency range shall be120Hz–18 kHz; phase response shall
be 400 Hz– 20kHz ±45°; linear peak SPL shall be 111.5 dB with crest
factor >16.5 dB, measured with M‑noise, free field at 4 m referred to 1m;
coverage shall be 80° horizontal and 80° vertical at 3–14kHz ±10°.
The loudspeaker shall be equipped with a single SwitchCraft EN3
5‑pin connector (two pins for DC power, three pins for balanced
Meyer Sound Laboratories, Inc.
2832 San Pablo Avenue
Berkeley, CA 94702
+1 510 486.1166
www.meyersound.com/contact
www.meyersound.com
audio). The audio input shall be electronically balanced with a
10 Ω impedance and accept a nominal –2.5dBV (0.75V rms) input signal.
Power requirements for the loudspeaker shall be an external Meyer Sound
power supply, such as the MPS‑482HP or MPS‑488HP IntelligentDC.
Loudspeaker components shall be housed in a sealed, extruded aluminum
enclosure with a black anodized finish. Standard white and custom colors
shall also be available. Dimensions with grille frame shall be W: 4.04 in
(103 mm) x H: 4.04 in (103 mm) x D: 5.72 in (145 mm). Weight shall be
4.2 lb (1.9 kg). On each side of the enclosure, 0.375 in‑16 inserts shall
accommodate MeyerSound mounting and rigging options.
The loudspeaker shall be the Meyer Sound MM‑4XP.
MM-4XP
04.163.004.01 C2
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