Professional Buyer's Guide
Class 4 Therapy Lasers
The industry standard for pain clinics, chiropractic offices, and high-volume practices. More power means faster treatments, better pain control, and superior ROI.
Why Class 4 Became the Industry Standard
Back in 2002, we sold mainly Class 1-3B lasers. Lower-power manufacturers spent their time fear-marketing against Class 4, claiming they were "too powerful" and "too dangerous." But we kept hearing from doctors getting incredible results with Class 4 therapy.
Many doctors started with lower-power systems because that's what was available. Eventually, they saw the light and upgraded. They wanted Class 4 because it provides better, faster results. Today, Class 4 lasers are the standard in thousands of pain clinics and tens of thousands of chiropractic offices across the U.S.
Faster Treatments
A 10W laser accomplishes in 1 minute what a 1W laser needs 10 minutes for. Same dosage, fraction of the time.
Superior Pain Control
Higher power delivers better pain relief. The entire industry agrees: more power = better pain control.
Larger Treatment Areas
Neuropathy, back pain, large joints. Class 4 covers more area without marathon treatment sessions.
Better ROI
More patients per hour, faster results, happier patients. Class 4 pays for itself faster than lower-power systems.
Class 4 Systems We Carry
ColdLasers.org offers more high-quality FDA-cleared Class 4 options than any other seller:
| System | Power | Wavelengths | Modes | Best For | Price |
|---|---|---|---|---|---|
 ReGen Laser Gold Standard
|
30-104W | Up to 6 (450-1064nm) | Pulse + CW | Premium practices, temp monitoring, 5-year warranty | $16,950 - $54,950 |
 ATPmax Laser Best Value
|
25-60.3W | Up to 4 | Pulse + CW | High performance at low cost, best price/watt | $10,950 - $19,950 |
 EVOlaser
|
9-30W | Up to 4 | Pulse + CW | Compact, affordable, built-in protocols | $9,950 - $14,995 |
 EVO FX
|
45W | 3 wavelengths | Pulse + CW | Simple operation with maximum power | $24,000 |
 Apollo Laser Entry Level
|
0.5-5W | 810nm | CW only | No-fiber classic design, home use friendly | $5,149+ |
 Eltech K-Laser
|
12-30W | Tri/Quad | Pulse + CW | Italian quality, established brand | $19,990 - $45,000 |
All systems FDA-cleared and include training + protocols. We price-match any authorized dealer. Financing available on all systems.
Compare Our Systems vs. the Competition
We're not a manufacturer pushing one product line. Pick any of our systems and a competitor to see the head-to-head spec comparison.
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Competitor pricing and specs based on publicly available data as of 2025. Contact us for the latest verified comparisons.
Why Buy Through ColdLasers.org?
Every manufacturer's rep will tell you their laser is the best. We carry systems from multiple brands so we can match you to the right laser, not just the one that pays us the most.
Laser Therapy ROI Calculator
Select your laser system, adjust sliders to match your practice, and see projected revenue based on typical treatment fees and patient volume.
52 treatments per month
When Class 4 is the Best Choice
Class 4 is Ideal For:
- High-volume practices (see more patients/hour)
- Deep tissue treatment (hips, shoulders, spine)
- Large treatment areas (neuropathy, back pain)
- Superior pain control requirements
- Variety of conditions needing flexibility
- Practitioners who want every option available
- Home users wanting professional-grade results
Consider Class 3B If:
- Budget is primary concern
- Low patient volume (1-5 per day)
- Treatment time isn't a constraint
- Primarily superficial conditions
- Just starting laser therapy
Many practitioners start with 3B and upgrade to Class 4 as volume grows.
The Simple Math
A 10W laser for 1 minute = A 1W laser for 10 minutes
Both deliver exactly 600 joules. Same dosage, different time.
Quick Decision Guide
About Systems Over 40 Watts
Not All Class 4 Systems Are Alike
Much of the bad press about Class 4 is really about poorly-designed high-power systems. Once you get into 40+ joules/second, you need to either use larger emitters, keep the system moving, or have thermal control.
The ReGen Solution
ReGen is the first system to solve this with built-in skin temperature monitoring that automatically adjusts power to prevent overheating. Plus:
- Larger emitters for better energy distribution
- Up to 6 wavelengths including cooler options
- Blue laser (450nm) for antibacterial applications
- 5-year warranty with responsive support
Separating Facts from Fear Marketing
Lower-power manufacturers have spread myths about Class 4 systems. Here are the facts:
"Class 4 lasers are dangerous"
With proper training and safety glasses, Class 4 lasers are used safely in tens of thousands of clinics. The main risks (eye damage, skin heating) are easily managed with standard protocols. Cars are dangerous too, but that doesn't mean we don't use them.
"Too much power reduces healing effectiveness"
This claim is NOT supported by independent research, only by studies paid for by lower-power manufacturers. The Arndt-Schulz curve they cite has no actual numbers. And Class 4 systems have adjustable power: turn it down when you want less, turn it up for pain control.
"Class 4 lasers aren't appropriate for home use"
Many patients start in clinics and then purchase Class 4 for home use. With a prescription and proper training, systems like the Apollo (divergent beam, simple controls) are well-suited for home users wanting professional-grade results.
"Class 4 lasers aren't worth the money"
Quality Class 4 systems start under $10,000. Meanwhile, some mediocre Class 3B systems cost $15,000+. For busy practices, Class 4 delivers better ROI through faster treatments and better results. You get what you pay for.
The Bottom Line
The line between Class 3B and Class 4 is actually gray. The Avant LZ30z (Class 3B at 2.4W) has similar specs to entry Class 4 systems. What matters is the results for your specific application.
But here's what we know after 20+ years: Many people who don't get results with Class 3B do get results with Class 4. That's why Class 4 is used in tens of thousands of clinics across the U.S.
Frequently Asked Questions
What exactly makes a laser "Class 4"?
The technical cutoff is 500mW (0.5 watts) per diode. Anything above 500mW per diode is Class 4. This ranges from just over 0.5W to 100+ watts. Once you get above about 5 watts, systems use fiber optic cables to transfer power from a cooled housing to the handheld probe.
Do I need a prescription to buy a Class 4 laser?
For professional use in a clinic, no prescription is needed. For home use, you'll need a prescription from a licensed provider (physician, chiropractor, etc.). This is easily obtained and we can help guide you through the process.
What's the best wavelength for Class 4?
810nm provides the highest efficiency for photobiomodulation deep in tissue. Multi-wavelength systems add 660nm for superficial treatment, 905-980nm for additional depth, and some include 450nm (blue) for antibacterial applications. If treating deep structural issues, prioritize 810nm output.
Does delivery rate affect efficacy?
No. In our experience, there's no difference between using a 1W laser for 10 minutes or a 10W laser for 1 minute. Both deliver exactly 600 joules. Higher power just lets you treat larger and deeper areas in a reasonable time.
How do I keep the system safe over 40W?
Three options: use larger emitters, keep the system moving during treatment, or choose a system with thermal control (like the ReGen). In busy clinics, keeping the emitter moving is standard practice anyway for treating large areas.
Which Class 4 system is best for me?
It depends on your practice. Call us at (800) 388-0850 and we'll help you find the right fit. We carry every major FDA-cleared option and can match you based on patient volume, primary conditions treated, and budget.
Ready to Upgrade Your Practice?
We've helped thousands of practices find the right Class 4 system. Schedule a free consultation or call us directly.
We price-match any authorized dealer. 30-day guarantee for professionals. Financing available.