Richmar Winner Evo CM4 Combo Ultrasound & Electrotherapy Unit Review: Is This Clinical Cart System Worth It?

If you run a physical therapy clinic, chiropractic practice, or sports medicine facility, you already know that floor space costs money — and having separate machines for ultrasound therapy and electrical stimulation is a luxury few small practices can afford. The Richmar Winner Evo CM4 combo unit promises to solve that problem with a single cart-based system that handles both modalities. But is a used or refurbished unit actually a sound investment, or are you buying someone else's headache?

We dug into the specs, clinical use cases, and resale market to give you a clear picture.

Product Overview

The Richmar Winner Evo CM4 is a clinical-grade combination therapy unit produced by Richmar, a well-regarded American manufacturer of therapeutic ultrasound and electrical stimulation equipment. The "CM4" designation refers to the 4-channel electrotherapy configuration, allowing clinicians to run four independent stimulation channels simultaneously — useful for bilateral or multi-site treatment protocols.

Key specifications (as manufactured):

• Modalities: Therapeutic ultrasound (1 MHz / 3 MHz) + 4-channel electrical stimulation (EMS, TENS, Russian Stim, Interferential, Premodulated, High Volt)
• Ultrasound output: Continuous and pulsed modes
• Ultrasound probe head: 5 cm² standard applicator (1 MHz); optional 2 cm² small-area head
• Electrical stimulation waveforms: Multiple programmable preset protocols
• Cart integration: Rolling cart with storage shelf for accessories, leads, and coupling gel
• Display: Backlit digital panel with parameter readout
• Power: 110V AC, standard clinical outlet

Who this is built for: Licensed physical therapists, chiropractors, athletic trainers, and rehabilitation specialists. This is not a consumer-grade home-use device — it is built to clinical standards and intended for professional settings.

Hands-On Experience

The Winner Evo CM4's design philosophy is straightforward: consolidate two treatment modalities into one footprint without compromising clinical capability. In practice, that means a tall cart unit (roughly the size of a small office printer on a rolling stand) that parks cleanly beside a treatment table.

Setup: Units sold with a cart and full accessories typically include the stimulation leads, electrodes, ultrasound probe head, and coupling gel. Setup from unboxing is relatively quick for clinicians already familiar with either modality — the control panel uses clearly labeled zones for the ultrasound section and the e-stim section, so there is no steep learning curve if your staff has used standalone Richmar or comparable units (like the Apogee 800 ultrasound system).

Ultrasound performance: The 1 MHz/3 MHz dual-frequency ultrasound delivers thermal and non-thermal effects appropriate for deep and superficial tissue treatment. Pulsed mode is valuable for acute-phase management where thermal heating is contraindicated. The 5 cm² probe head covers standard treatment areas efficiently, and the small-area applicator (when included) handles periarticular sites like the wrist or ankle.

Electrotherapy performance: The 4-channel configuration is where this unit differentiates itself from basic combo units. Running four channels simultaneously is genuinely useful in high-volume clinics — you can treat a patient bilaterally (both knees, for example) or run a complex multi-site protocol without reconfiguring mid-session. The interferential and Russian stimulation programs are clinically respected waveforms for muscle re-education and pain management.

Cart and accessories: The rolling cart is the underappreciated feature here. Standalone units require a dedicated surface; the integrated cart means the CM4 can follow the clinician from room to room or serve as a dedicated treatment station. The accessory shelf keeps leads, gel, and probe storage within arm's reach.

Pros and Cons

Pros

• Combines therapeutic ultrasound and 4-channel e-stim in a single unit — reduces equipment costs and floor space
• Dual-frequency ultrasound (1 MHz / 3 MHz) covers both deep and superficial tissue applications
• 4 simultaneous stimulation channels support bilateral and multi-site protocols
• Rolling cart design is practical in busy clinic environments
• Strong resale market means units are often available with full accessories at significant discounts vs. new

Cons

• As a combo unit, failure of one component (e.g., the ultrasound head) means the whole unit may be out of service unless you have spare parts
• Used/refurbished units require validation — probe output intensity should be verified with a calibration device before clinical use
• The cart adds bulk; not ideal if portability (room-to-room or off-site) is a priority
• No touchscreen or modern connectivity features — the digital panel is functional but dated by current standards
• Replacement probe heads and clinical ultrasound probes can be costly if the original is damaged

Performance Breakdown

Who Should Buy This

Small-to-mid-volume PT or chiropractic clinics that need reliable combo therapy capability without the price tag of a new unit. If you are seeing 15–30 patients per day and want to standardize on a single cart-based system for modality treatment, the CM4 covers the clinical bases.

Athletic training rooms at schools, universities, or sports organizations where budget is constrained but clinical output matters. The 4-channel e-stim is particularly useful in sports rehab contexts.

Clinicians expanding a second treatment room who already own a primary unit and want a capable, cost-effective second station.

Buyers comfortable evaluating used medical equipment — or who have access to a biomedical technician who can verify ultrasound output calibration before putting the unit into clinical service.

Who Should Skip This

Clinicians needing portability for home-visit, mobile practice, or travel applications. The cart format is designed for a fixed clinic environment. Consider a portable ultrasound alternative if your use case requires mobility.

High-volume practices that run ultrasound and e-stim simultaneously on different patients — a single combo unit creates a bottleneck. Dedicated standalone units allow parallel patient treatment more efficiently.

Buyers without calibration resources — if you cannot verify that a used ultrasound probe is delivering accurate output, you should not use it clinically. Do not skip this step.

Practices prioritizing new-equipment warranties — the resale market offers value, but without manufacturer warranty coverage, you are taking on maintenance risk.

Alternatives Worth Considering

1. Intelect Legend XT (Chattanooga)

A widely used combo unit with similar modalities and strong clinical credibility. The Intelect Legend XT is arguably the most common combo unit in American physical therapy clinics, which means parts, service, and trained technicians are easy to find. It is typically priced similarly to the Richmar CM4 on the used market. Search eBay for current listings.

2. Dynatron 950 Plus (Dynatronics)

The Dynatron 950 is a durable workhorse with a loyal following in physical therapy. It offers comparable ultrasound and e-stim capabilities and has excellent parts availability. A good alternative if you find the Richmar CM4 unavailable or outside your budget. Check Amazon for Dynatronics units.

3. Apogee 800 Combo System

For practices already invested in the Apogee product line, the Apogee 800 ultrasound system paired with a separate e-stim unit may offer more flexibility than a single combo unit — particularly if you want to replace components independently. See our full Apogee 800 review for details.

Where to Buy

The Richmar Winner Evo CM4 combo unit is not typically sold new through traditional retail channels — Richmar distributes through clinical equipment dealers. The most accessible source for complete cart-and-accessories packages is the used clinical equipment market, where these units appear regularly as practices upgrade or close.

eBay is the most active marketplace for this unit. Listings vary widely in condition — from "as-is for parts" to fully tested, refurbished units with accessories included. Look for listings that specify:

• Functioning ultrasound output (ideally with a recent calibration date)
• All four e-stim channels confirmed working
• Original cart, leads, and probe head included

Search eBay for Richmar Winner Evo CM4 combo units →

Amazon occasionally lists new or refurbished clinical electrotherapy equipment from third-party medical equipment dealers. Stock is less consistent than eBay but worth checking for bundled packages.

Search Amazon for Richmar combo therapy units →

FAQ

Is the Richmar Winner Evo CM4 FDA-cleared? Richmar manufactures FDA-registered therapeutic devices. However, always verify the specific unit's registration status and confirm it is appropriate for your intended clinical use. For professional clinical use, consult your state's practice regulations regarding required device certifications.

Can I use this unit for home therapy? The Winner Evo CM4 is a professional clinical device. While there is no technical barrier preventing personal use, it is designed and sized for clinic environments. For home use, consumer-grade TENS units or portable ultrasound devices are more appropriate and significantly less expensive.

How do I verify ultrasound output on a used unit? A calibrated ultrasound output meter (such as a radiation force balance or ultrasound wattmeter) is the standard method. Many biomedical equipment service companies offer this as a standalone service. Do not skip this step before clinical use.

What replacement probes are compatible? Richmar-specific probe heads are the primary compatible option. Some third-party clinical ultrasound probes with matching connector types may be compatible, but always confirm output specifications before use. See our guide to clinical ultrasound probes for more context on what to look for.

How many patients can I treat per hour with this unit? The ultrasound head treats one site at a time; typical treatment durations run 5–10 minutes per area. The 4-channel e-stim can run simultaneously on a patient during or after ultrasound. A realistic throughput in a single-clinician setup is 4–6 patients per hour for basic modality treatment.

What does the CM4 designation mean? "CM" refers to the combo modality configuration (ultrasound + electrical stimulation), and "4" denotes the four independent electrical stimulation channels. A CM2 variant with two channels also exists in the Winner Evo line.

Final Verdict

The Richmar Winner Evo CM4 is a solid clinical combo unit that earns its reputation in physical therapy and rehabilitation settings. The 4-channel e-stim configuration is a genuine differentiator over basic 2-channel combo units, and the integrated rolling cart is a practical feature that is easy to undervalue until you are managing a busy treatment schedule.

For clinics that can source a well-maintained used unit with verified ultrasound output, this represents excellent value — typically a fraction of the cost of equivalent new equipment. Just commit to due diligence on calibration, and factor in the lack of manufacturer warranty when budgeting for ownership.

Our recommendation: If you need a reliable, mid-volume combo therapy station and are comfortable with used clinical equipment, the CM4 is worth serious consideration. Check current eBay listings for complete cart packages, and budget for a calibration verification before your first clinical use. ```