Richmar Quattro 2.5 DQ8450 | 4-Channel TENS, EMS, IFC & Russian Stim

The Richmar Quattro 2.5 is a professional four-channel electrical-stimulation system for physical therapy clinics, rehabilitation departments, chiropractic offices, sports-medicine practices, athletic-training rooms, and other clinician-directed treatment settings.

Five electrotherapy waveform families are built into one compact tabletop device:

• TENS
• EMS
• Russian stimulation
• IF-2P premodulated interferential
• IF-4P traditional interferential

The Quattro 2.5 also provides two programmable treatment groups, 50 preset programs, user-defined protocols, professional two-step programming, constant-current and constant-voltage operation, and a large graphical LCD display. This combination gives clinicians considerably more control than a basic portable TENS or two-channel combination stimulator.

Sale by or on the order of a physician or licensed practitioner. It is intended for use under the continuing supervision of a qualified professional.

For complete setup, parameter, safety, cleaning, error code, and troubleshooting information, read our Quattro 2.5 Manual Summary, Safety, and Specifications.

• Professional microprocessor-controlled electrotherapy system
• Four stimulation output channels
• Two independently programmable channel groups
• Individual output-intensity control for all four channels
• TENS, EMS, Russian, IF-2P, and IF-4P waveform families
• Synchronous and asynchronous EMS modes
• Synchronous and asynchronous Russian modes
• Two programmable treatment timers
• Ten presets per waveform family
• Fifty total presets
• User-defined protocol storage
• Professional mode with two treatment steps
• Constant-current and constant-voltage output choices
• Interferential vector and frequency-modulation controls
• Large graphical LCD display
• Physical knobs for direct channel-intensity adjustment
• Maximum treatment time of 60 minutes
• AC-powered tabletop and therapy-cart design
• Starter self-adhesive and reusable rubber electrodes
• Two-year manufacturer warranty

The device is suitable for tabletop, therapy cart, or mobile use, but the device requires its supplied AC power adapter rather than operating from an internal battery.

The Quattro 2.5 has four output channels, but the programming is organized into two treatment groups.

This arrangement allows the clinician to run a different waveform, program, timer, and intensity configuration on Channels 1–2 than on Channels 3–4. This can support two treatment areas or two patients at the same time when clinically appropriate and properly supervised.

It should not be marketed as four entirely separate programmable systems. The intensities are individually controlled, but waveform and timing selections are shared within each two-channel group.

Symptomatic relief of chronic intractable pain and acute post-traumatic or post-surgical pain for TENS and interferential modes. Its EMS and Russian indications include muscle-spasm relaxation, prevention of disuse atrophy, local circulation, muscle re-education, maintaining or increasing range of motion, and immediate postoperative lower-leg stimulation for prevention of venous thrombosis when appropriately ordered and supervised.

For a broader explanation of sensory and muscle-stimulation modalities, read TENS vs. NMES: Differences, Uses, and Safety.

The Quattro 2.5 allows a static beat frequency or frequency-modulated sweep. IF-4P additionally includes automatic vector control from 0% to 100% and manual vector adjustment from 0° to 90°.

Explore related products and education in our Interferential Therapy collection.

These are device capabilities, not recommended patient settings. Treatment parameters must be selected according to the prescription, clinical assessment, waveform, electrode size, placement, patient response, and complete device instructions.

The Quattro 2.5 allows the clinician to select either CC or CV operation.

Neither mode is automatically superior for every treatment. The choice should be made by a trained clinician using the manual, electrode instructions, facility protocol, and patient-specific treatment plan.

Richmar’s manual lists the following starter accessories:

Includes the Quattro 2.5 device, starter self-adhesive electrodes, rubber electrodes, sponges, elastic straps, lead wires, device connectors, power supply, and instruction manual. Accessory quantities and part numbers are subject to the current Richmar package configuration.

The Quattro 2.5 can be used with compatible self-adhering electrodes or reusable rubber electrodes with properly prepared sponges or approved conductive gel.

Use self-adhesive electrodes with at least 25 cm² of active surface area and specifically recommends a minimum size of approximately 2" × 2". Electrodes should be fully adhered, separated from one another, and selected to fit the anatomy and planned current density.

Added conductive gel is normally not needed with pre-gelled self-adhesive pads. Gel or properly moistened sponges are used with the reusable rubber-electrode system as directed in the manual.

• Four-channel clinical stimulation is needed.
• Both premodulated and traditional four-pole IFC are important.
• The clinic wants TENS, EMS, and Russian stimulation in the same system.
• Two treatment groups with separate timers are useful.
• Fifty presets and custom programming provide enough flexibility.
• Ultrasound is not required.
• A conventional clinical LCD-and-dial interface is preferred.
• The clinic wants a lower-cost option than a premium touchscreen system.

The device is not a general consumer home TENS unit. Its parameter range, output capability, professional programming, electrode requirements, and clinical warnings make clinician supervision essential.

This section should remain concise on the product page, with the complete procedure kept in the manual article.

1. Inspect the device, cables, lead wires, electrodes, and skin.
2. Connect the AC adapter and switch on the device.
3. Connect the lead wires through the appropriate Quattro cable connectors.
4. Place correctly sized electrodes on clean, dry, intact skin.
5. Select Channels 1–2 or Channels 3–4.
6. Select the waveform and preset or custom program.
7. Select constant-current or constant-voltage operation.
8. Adjust the waveform-specific treatment parameters.
9. Set the treatment time.
10. Increase each channel intensity gradually while monitoring the patient.
11. Reduce output to zero and stop the selected channel group before removing electrodes.

The device performs an initial self-test and includes load detection that can alarm and reset the intensity if adequate electrode contact is not detected.

• Quattro 2.5 Manual Summary, Setup and Safety
• TENS vs. NMES Guide
• Contact Balego