N
on-invasive. Non-thermal. Clinically targeted.
What is the MR4?
The Multi Radiance MR4 is an advanced super-pulsed photobiomodulation (PBM) system designed to reduce pain, accelerate healing, and enhance recovery without heat, tissue damage, or downtime. In contrast to traditional high-power lasers, the MR4 delivers high peak power in extremely short pulses, allowing energy to penetrate deeper into tissue while maintaining a very low average power output. This means:
No thermal buildup (no “burning” effect)
Safe for repeated use
Deeper biological impact at the cellular level
In short, MR4 technology is commonly referred to as a “cold laser”, despite its ability to influence deep tissues.
The MR4 utilizes three wavelengths that target different tissue depths and biological pathways. In addition, the MR4 does not rely on a single light source. It uses a multi-wavelength system designed to target different tissue depths and biological pathways simultaneously.
- Super Pulsed Laser (905 nm – Near Infrared)
Type: Coherent laser light
Primary role: Deep penetration + pain modulation
Effect: Reaches deeper musculoskeletal structures (joint, tendon, nerve), influences nerve conduction and pain signaling, and improves microcirculation
This wavelength is delivered in high-intensity pulses, allowing photons to travel deeper into tissue without heating the surface.
- Infrared Light (875 nm – SLD)
Type: Super-luminescent diode (broadband infrared)
Primary role: Mid-depth tissue healing
Effect: Enhances blood flow, supports soft tissue repair, and expands treatment coverage area
This wavelength enables broader tissue interaction, complementing the deeper penetration of the super-pulsed laser.
- Red Light (~660 nm – Visible Spectrum)
Type: LED light
Primary role: Superficial tissue + cellular activation
Effect: Stimulates mitochondrial activity (ATP production), supports skin, fascia, and superficial structures, and enhances collagen and tissue repair
Why do multiple wavelengths matter?
It should be noted that research shows combining wavelengths (660, 875, 905 nm) creates a synergistic effect, improving healing outcomes compared to single-wavelength therapy. Each wavelength interacts with different tissue depths and cellular targets, producing what is often referred to as a “cascading energy effect.”
What about penetration?
One of the biggest misconceptions in laser therapy is that “more watts = deeper penetration.”
That’s not how tissue interaction actually works. True penetration depends on multiple factors, including:
Wavelength (nm)
Pulse structure (super-pulsing vs continuous)
Tissue absorption characteristics
Photon density (not surface heat)
The MR4’s super-pulsed 905 nm wavelength allows energy to:
Bypass superficial absorption
Reach deeper tissues
Deliver energy more effectively to the target tissue
Studies have shown that super-pulsed multi-wavelength systems can achieve stronger biological effects without thermal damage, making them ideal for musculoskeletal care.
The MR4 has two emitters: Class 1 (Shower) + Class 3B (Targeted Emitters)
First, the LaserShower™ (Area Treatment) treats areas up to 5x larger than standard probes:
It’s ideal for:
Muscle groups (example: back, quads, and hamstrings)
Post-surgical regions
General inflammation
With this applicator, we think of coverage, recovery, and efficiency.
Second, the Class 3B LaserStim™ (Targeted + Neuro Component) allows for higher precision and more targeted application. This combines laser therapy and electrical stimulation in a single probe.
Automatically identifies treatment areas (TARGET technology)
It’s ideal for:
Trigger points
Tendon insertions
Joint lines
Nerve pathways
Pain modulation
With this applicator, we think of precision and neuromodulation.
But what about Class 4 Lasers?
Class 4 lasers rely on high continuous power and heat. Along with feeling warm, this energy comes with tradeoffs:
Increased thermal risk
More surface absorption
Requires strict safety precautions
Less selective biological targeting compared to super-pulsed systems
In contrast, MR4 technology delivers more usable energy to the target tissue rather than being absorbed superficially. It also avoids heat buildup and has a stronger body of PBM (low-level laser) research to support its effects. It allows for frequent, repeatable treatments. Super-pulsed systems have been shown to deliver energy more efficiently to deeper tissues while preventing overheating of superficial layers, thereby improving clinical usability.
What Does the MR4 Actually Do?
Clinically, you’ll see reduced pain (acute and chronic), faster tissue healing, improved circulation, decreased inflammation, and enhanced tolerance to rehab.
At the cellular level, it achieves increased ATP production, stimulates fibroblast activity, enhances collagen synthesis, and improves microvascular flow.
Photobiomodulation has been shown to accelerate wound healing, improve tissue regeneration, and enhance cellular repair processes.
How does the MR4 integrate with StemWave electrohydraulic shockwave therapy?
This is where the MR4 becomes extremely valuable. The MR4 and StemWave put into play something we can call “Sequential Synergy”.
StemWave serves as the mechanical phase of treatment.
It delivers targeted acoustic energy that drives mechanotransduction and cavitation, stimulating regenerative pathways and addressing deeper structural dysfunction.
The MR4 then follows as the biochemical phase.
It helps modulate pain, improve circulation, and enhance cellular activity, supporting tissue recovery, optimizing the post-treatment environment, and reducing residual soreness.
Simply put:
StemWave provides the mechanical signal, while MR4 delivers the biochemical response.
Together, this sequence helps amplify healing pathways and accelerate the return to function and performance.
Bottom Line:
The Multi Radiance MR4 is not about heat or brute force. It’s about delivering the right energy, at the right depth, in the right way. It offers multi-wavelength synergy, super-pulsed energy delivery, no risk of thermal damage, and is supported by decades of photobiomodulation research.
On its own, it offers significant clinical benefits. When paired with StemWave, it becomes a highly effective and powerful tool for recovery, rehabilitation, and performance optimization.
