Meyer Sound MSL-4

€2,159.08

For sale used Meyer Sound MSL-4 Self-Powered Reinforcement Loudspeakers in good condition. Price shown is per piece. Comes in flightcase.

Category: Meyer Sound

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Meyer Sound MSL-4: The Touring Loudspeaker That Defined an Era of Power and Clarity

Long before line arrays took center stage, the Meyer Sound MSL-4 ruled the professional audio world. Known for its high SPL, extended frequency response, and unwavering reliability, this self-powered loudspeaker became a staple for touring rigs, large-scale installations, and permanent venues alike.

Even today, many professionals still rely on the MSL-4, praising its clarity, power handling, and rugged design that stands the test of time.

What Is the Meyer Sound MSL-4?

The MSL-4 is a long-throw, self-powered, two-way loudspeaker engineered for high-output and focused dispersion. Its horn-loaded design provides excellent projection, making it ideal for large venues and outdoor festivals.

Key Specifications:

Coverage Pattern: 70° horizontal × 40° vertical
Frequency Response: 65 Hz – 18 kHz
Peak SPL: 139 dB @ 1 meter
Drivers: 15″ low-frequency driver, 4″ diaphragm compression driver
Amplification: Two-channel class AB/H self-powered
Dimensions: 37.4″ H × 21.6″ W × 21.9″ D
Weight: 157 lbs (71.2 kg)

This speaker was designed for systems requiring high headroom, directional control, and ease of deployment in flown or stacked configurations.

Why the MSL-4 Still Matters in Modern Audio

Legendary Output and Projection

At 139 dB peak SPL, the MSL-4 can fill arenas and outdoor festivals with focused, high-energy sound. Its long-throw capabilities made it a favorite before line arrays became mainstream—and it’s still relevant today for many legacy and hybrid systems.

Horn-Loaded Design for Focused Coverage

The 70° × 40° pattern ensures tight horizontal control and vertical throw, allowing sound to cut through long distances without muddying mids or highs.

Self-Powered Simplicity

Because it’s a self-powered loudspeaker, there’s no need for external amps or complicated signal chains. This makes deployment quick and reliable, especially in fast-paced live environments.

Rugged Construction for Touring

The MSL-4 was designed with the road in mind. It features heavy-duty handles, a birch enclosure, and durable hardware, all of which have proven road-worthy over decades of use.

Top Use Cases for the MSL-4

Environment	Ideal Application
Concert Touring Rigs	Main front-of-house arrays or stacks
Outdoor Events	Long-throw PA for open venues and festivals
Large Churches	Distributed sound in cathedrals and sanctuaries
Performing Arts Centers	Balcony and delay fill or FOH arrays
Convention Halls	High-intelligibility front systems

MSL-4 vs UPQ-1P vs JM-1P: Where Does It Stand Today?

Feature	MSL-4	UPQ-1P	JM-1P
Peak SPL	139 dB	136 dB	139 dB
Coverage	70° x 40°	80° x 50°	60° x 40°
Form Factor	Horn-loaded	Direct-radiating	Advanced horn-loaded
Best Use Case	Large-scale throw	Wide-dispersion venues	Long-throw and clarity

The MSL-4 still holds its ground for those needing a powerful, horn-based cabinet with proven performance.

Engineering Behind the MSL-4

Advanced Limiting and Driver Protection

Meyer Sound’s TruPower™ Limiting system preserves dynamics while preventing driver damage, even under prolonged high SPL use.

Phase-Correct Crossover

The internal processor uses a phase-accurate crossover, ensuring that lows and highs blend smoothly without interference or phasing issues.

Two-Way Amplification

A dedicated amp channel for each driver ensures the best performance, allowing the system to remain stable and clean even during demanding use.

What Sound Engineers Say About the MSL-4

Professionals who’ve used the MSL-4 over the years speak highly of its:

Intelligibility at high SPLs
Ease of deployment in flown systems
Clarity and punch over long distances
Consistency across multiple boxes

Although newer models exist, the MSL-4 remains in service globally, especially in permanent installations and legacy setups.

Where to Buy the Meyer Sound MSL-4

Looking to purchase or replace a Meyer Sound MSL-4? Visit Sasphonik’s Pro Audio Shop for:

Certified pre-owned units
Full support and consultation
System design tailored for legacy Meyer setups
Rigging accessories and configuration advice

About Meyer Sound Laboratories

Since 1979, Meyer Sound has set the standard in scientifically engineered loudspeaker systems. From Broadway to Burning Man, Meyer systems are known for precision, durability, and acoustic transparency—and the MSL-4 played a huge part in building that legacy.

FAQs About the Meyer Sound MSL-4

Is the MSL-4 still in production?
No, it’s a legacy product. However, it’s still supported and widely used in installed and touring systems.

Can it be flown in line arrays?
Yes, it was originally designed for flown applications with rigging hardware available.

What systems pair well with MSL-4?
Subwoofers like the Meyer 650-P, 700-HP, or 600-HP provide ideal low-end support.

Does it require external DSP?
No. It includes internal crossovers and limiting, though it integrates well with Galileo processors for full-system tuning.

Is it a good choice for new installs?
While newer models exist, the MSL-4 still delivers excellent sound for installs with budget or legacy constraints.

How durable is the enclosure?
Extremely. The birch-ply cabinet is built to withstand years of road use or permanent mounting.

Conclusion: A Loudspeaker That’s More Than Legacy

The Meyer Sound MSL-4 may be a classic, but it’s far from obsolete. It continues to earn its place in high-performance sound systems across the globe. With incredible throw, precise coverage, and rock-solid construction, it remains a legend in live sound.

To see if the MSL-4 fits your next project, explore options at Sasphonik’s official store.