Spectra Apex HSR Compared to 12 Popular Full Body Mat PEMF Devices
Spectra Apex HSR vs. Leading PEMF Full Body Devices
PEMF therapy works by sending magnetic pulses into the body that help stimulate cells, improve circulation, and support the body’s natural healing processes. For these pulses to actually do something meaningful, they must be both strong enough and fast enough. Scientists measure this using something called slew rate, which reflects how much energy is delivered into the body. Research shows that effective PEMF systems typically operate within specific ranges of intensity and speed so the cells can respond properly.
The Spectra Apex HSR PEMF systems are engineered to deliver pulses within these research-supported ranges. Their higher slew rate allows more energy to transfer into the body’s tissues, which may help activate cellular repair, reduce inflammation, and support recovery. In contrast, testing of 12 leading PEMF brands shows that they produce a weaker slew rate because of either too low of an intensity and/or too slow of a pulse rise time. Additionally because most PEMF coils are much smaller than the Spectra, the energy and slew rate quickly fades as it tries to penetrate into the body, meaning less energy reaches deeper tissues like joints, muscles, and organs.
PEMF therapy works by sending magnetic pulses into the body that help stimulate cells, improve circulation, and support the body’s natural healing processes. For these pulses to actually do something meaningful, they must be both strong enough and fast enough. Scientists measure this using something called slew rate, which reflects how much energy is delivered into the body. Research shows that effective PEMF systems typically operate within specific ranges of intensity and speed so the cells can respond properly.
The Spectra Apex HSR PEMF systems are engineered to deliver pulses within these research-supported ranges. Their higher slew rate allows more energy to transfer into the body’s tissues, which may help activate cellular repair, reduce inflammation, and support recovery. In contrast, testing of 12 leading PEMF brands shows that they produce a weaker slew rate because of either too low of an intensity and/or too slow of a pulse rise time. Additionally because most PEMF coils are much smaller than the Spectra, the energy and slew rate quickly fades as it tries to penetrate into the body, meaning less energy reaches deeper tissues like joints, muscles, and organs.
Magnetic X-Ray Images of 7 Popular PEMF Full Body Mats at 1 inch and up.
(A=Spectra, B=iMRS, C=BEMER, D=Centropix, E=QRS/PureWave, F=Sedona Pro/MAS, G=Higher Dose).
Measurements to Create 3D PEMF Plots Over 7500 measurements using an accurate Hall Effect Probe was done on 12 Popular full body mat PEMF devices. Below are the graphs of 7 of these. The data was put into an MIT software program with AI to create an accurate visualization based on actual measurements. This is the first time any detailed test like this has ever been performed and gives a clear picture of the actual PEMF fields above a PEMF mat. Below are seven examples showing the magnetic field intensities above 40 microtesla (.4 Gauss). This threshold was selected so you could see the weak fields of these popular low intensity PEMF mats.
(A=Spectra, B=iMRS, C=BEMER, D=Centropix, E=QRS/PureWave, F=Sedona Pro/MAS, G=Higher Dose).
Measurements to Create 3D PEMF Plots Over 7500 measurements using an accurate Hall Effect Probe was done on 12 Popular full body mat PEMF devices. Below are the graphs of 7 of these. The data was put into an MIT software program with AI to create an accurate visualization based on actual measurements. This is the first time any detailed test like this has ever been performed and gives a clear picture of the actual PEMF fields above a PEMF mat. Below are seven examples showing the magnetic field intensities above 40 microtesla (.4 Gauss). This threshold was selected so you could see the weak fields of these popular low intensity PEMF mats.
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CAD Drawings to Perfect Scale of Coils of Leading PEMF Full Body Mat Devices (and Mat Dimensions - Note Many Full Body Mats are Very Short)
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Visualization Of Energy Domes over Coils (Penetration Depth ≈ Radius of Coil)
As Actual Magnetic X-ray Images Above Show, these are fairly Good Approximations)≈ 
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Comparison of Spectra APEX HSR Slew Rate vs Many of the Most Popular PEMF Full Body Mat Devices
Below left you can see the slew rate on the Spectra Apex HSR is more the 10 times greater than the next closest mat.
Below left you can see the slew rate on the Spectra Apex HSR is more the 10 times greater than the next closest mat.
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Magnetic X-Ray Images of Spectra & Leading Competition Slew Rates At 1 Inch Above the Mat and Up
Slew rate is the most important parameter of a PEMF signal, but properly engineered coils of a PEMF system will dictate how well, and how much area of your body a high-slew-rate PEMF signal will cover, and how deeply the PEMF signal will penetrate.
Measurements to Create 3D PEMF Plots Over 7500 measurements using an accurate Hall Effect Probe was done on 12 Popular full body mat PEMF devices. Below are the graphs of 7 of these. The data was put into an MIT software program with AI to create an accurate visualization based on actual measurements. This is the first time any detailed test like this has ever been performed and gives a clear picture of the actual PEMF fields above a PEMF mat. Below are seven examples showing the magnetic field slew rates above .05 T/s. This threshold was selected so you could see the weak fields of these popular low intensity PEMF mats.
Measurements to Create 3D PEMF Plots Over 7500 measurements using an accurate Hall Effect Probe was done on 12 Popular full body mat PEMF devices. Below are the graphs of 7 of these. The data was put into an MIT software program with AI to create an accurate visualization based on actual measurements. This is the first time any detailed test like this has ever been performed and gives a clear picture of the actual PEMF fields above a PEMF mat. Below are seven examples showing the magnetic field slew rates above .05 T/s. This threshold was selected so you could see the weak fields of these popular low intensity PEMF mats.
Comparison of Spectra APEX HSR Slew Rate vs Many of the Most Popular PEMF Full Body Mat Devices
Below left you can see the slew rate on the Spectra Apex HSR is more the 10 times greater than the next closest mat.
The Spectra slew rate is 15 times greater than Celler8 at the surface, but 5 inches up the Spectra has 246 times more Slew rate then the Celler8 (deeper penetration) and you can see from the magnetic X-ray plot above, the Spectra covers a much large area.
Below left you can see the slew rate on the Spectra Apex HSR is more the 10 times greater than the next closest mat.
The Spectra slew rate is 15 times greater than Celler8 at the surface, but 5 inches up the Spectra has 246 times more Slew rate then the Celler8 (deeper penetration) and you can see from the magnetic X-ray plot above, the Spectra covers a much large area.
Slew Rate Test of Spectra Vs 11 Top PEMF Mats
Slew rate is a measure of the steepness of the slope of a PEMF signal and visually below you can see the Spectra (Top) has a steeper slope than the competition. Both Pulses are taken in a -2.5 ms to + 2.5 ms window. The rise time of the Spectra can be seen to be .1 milliseconds = 100 microseconds. The average rise time of 11 top PEMF full body mats (2.77 ms) stretches all the way across half the window. The green line for the competition is very generous, in reality it is a much flatter slope. That is the Spectra slew rate 35 times greater than the competition so the slope would technically be 35 times steeper. But for the demonstration of how slew rates are measureed and compared, the Y-axis of the competition average is stretched out so you can see a slope.
The main point to understand is the steepness of the slope of Intensity vs Rise time is the slew rate and governs - along with the total coils area - how much energy is transferred from a PEMF device to your body via Faraday induction.
Slew rate is a measure of the steepness of the slope of a PEMF signal and visually below you can see the Spectra (Top) has a steeper slope than the competition. Both Pulses are taken in a -2.5 ms to + 2.5 ms window. The rise time of the Spectra can be seen to be .1 milliseconds = 100 microseconds. The average rise time of 11 top PEMF full body mats (2.77 ms) stretches all the way across half the window. The green line for the competition is very generous, in reality it is a much flatter slope. That is the Spectra slew rate 35 times greater than the competition so the slope would technically be 35 times steeper. But for the demonstration of how slew rates are measureed and compared, the Y-axis of the competition average is stretched out so you can see a slope.
The main point to understand is the steepness of the slope of Intensity vs Rise time is the slew rate and governs - along with the total coils area - how much energy is transferred from a PEMF device to your body via Faraday induction.
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Spectra Slew Rate Test
(Spectra Pulse In Image Above - TOP) Test Probe Used: AKM EQ730L
Above is the measurement at the surface in the center of the coil: 312.1 mV divided by 13mV per gauss equals 24.0 gauss intensity. For this measurement, the rise time is .100 milliseconds (2.40 mT/.100 ms = 24.0 T/s), yielding a slew rate of 24.0 T/s. Spectra has a surface slew rate on average 33 times greater than the competition! Using the same procedure at 5 inches up we find the slew rate of the Spectra is still 12.32 T/s This means the Spectra still has 51% of the Slew rate of the surface at 5 inches up! Spectra has a slew rate 5 inches up on average 246 times greater than the competition! |
Average Slew Rate 11 Top PEMF Full Body Mat Devices
(Average PEMF Pulse in Image Above - BOTTOM) Test Probe Used: AKM EQ730L
Above is the measurement on the surface at the point of maximum intensity (over the windings of the coil). The measured voltage were then converted to Gauss and divided by the average rise times. The average Intensity of 11 top full body mat devices was 15.7 Gauss (1.57 mT) and the average rise time was 2.77 milliseconds. Average Slew rate = Average Intensity / average rise time = .58 T/s So for these 11 measurement, the average slew rate of 11 top PEMF devices is .58 T/S. Using the same procedure at 5 inches up we find the slew rate of the 11 Top PEMF Full Body mats is ONLY .035 T/s. This means the average of the 11 top PEMF full body mats has only 7.5% of the Slew rate of the surface at 5 inches up! |
Based on a thorough investigation, we found 19 successful slew rate PEMF studies that can help guide us in what the best slew rates to use. The successful slew rates from these clinical studies average 26.7 T/s which can be a guiding light and a ballpark number for the ideal slew rate to use.
It is noteworthy to add that these 19 studies covered a wide range of tissue healing and regeneration from nerve to muscle to bone to joint/cartilage to tendons. The slew rate studies are summarized in the chart above left.
It is noteworthy to add that these 19 studies covered a wide range of tissue healing and regeneration from nerve to muscle to bone to joint/cartilage to tendons. The slew rate studies are summarized in the chart above left.
Spectral Content of Spectra vs Leading Brands
In addition to slew rate and intensity, another mechanism for energy transfer in PEMF systems involves magnetic resonance interactions, which depend on the spectral content of the emitted signal. (the range of frequencies contained within the pulse waveform).
Measurements of the spectral range of 11 top PEMF full mats mats show an average of approximately 20 - 4100 Hz, which is relatively limited compared to systems engineered with broader spectral bandwidth and higher energy pulse characteristics. In contrast, measurements of the Spectra Apex HSR reach up to 16,000 Hz.
In addition to slew rate and intensity, another mechanism for energy transfer in PEMF systems involves magnetic resonance interactions, which depend on the spectral content of the emitted signal. (the range of frequencies contained within the pulse waveform).
Measurements of the spectral range of 11 top PEMF full mats mats show an average of approximately 20 - 4100 Hz, which is relatively limited compared to systems engineered with broader spectral bandwidth and higher energy pulse characteristics. In contrast, measurements of the Spectra Apex HSR reach up to 16,000 Hz.
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Spectra HSR Frequency Spectrum - 20 - 16,000 Hz
[Window is 0-20,000 Hz] 
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Frequency Spectrum - 20 - 6000 Hz
[Window is 0-8,000 Hz] 
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In the case of Spectral content measurements, we are analyzing the magnetic field of PEMF mats to see what frequencies are contained in the magnetic field. It is important to know that the electrical signals that come out of the controller do not equal the magnetic fields coming out of the coil. These measurements are all taken with the same settings and the same sensor to show the relative difference between each mat. Using the same settings and sensor is important because a Fourier Transform can look very different based on the settings.
The measurements were taken with the following parameters:
The measurements were taken with the following parameters:
- Asahi Kasei Microdevices/AKM EQ-730L with 5v power supply
- A USB Ossilocope with configurable FFT settings in the software (waveforms software in particular used with these measurements)
- The start frequency is 20hz and the end frequency is 20khz
- The window setting is rectangular
Other Considerations
Along with all the performance specs we explored, there are other important considerations when shopping for a PEMF device such as price and value, warranty information, money back guarantee, country of origin and the type and quality of the full body mat and local applicators.
Along with all the performance specs we explored, there are other important considerations when shopping for a PEMF device such as price and value, warranty information, money back guarantee, country of origin and the type and quality of the full body mat and local applicators.
Conclusion
The Spectra HSR (High Slew Rate) PEMF systems are engineered to produce substantially higher rates of magnetic field change, allowing them to achieve clinically relevant slew rates within the ranges commonly reported in PEMF literature. By combining optimized magnetic intensity, rapid pulse rise times, and broader spectral content, Spectra Apex HSR systems maximize energy transfer into biological tissues through both Faraday induction (high dB/dt) and frequency-dependent resonance mechanisms.
This design approach enables more efficient stimulation of cellular pathways associated with inflammation modulation, tissue repair, and neuromuscular regulation, aligning system performance more closely with the parameters utilized in many published PEMF studies.
The Spectra HSR (High Slew Rate) PEMF systems are engineered to produce substantially higher rates of magnetic field change, allowing them to achieve clinically relevant slew rates within the ranges commonly reported in PEMF literature. By combining optimized magnetic intensity, rapid pulse rise times, and broader spectral content, Spectra Apex HSR systems maximize energy transfer into biological tissues through both Faraday induction (high dB/dt) and frequency-dependent resonance mechanisms.
This design approach enables more efficient stimulation of cellular pathways associated with inflammation modulation, tissue repair, and neuromuscular regulation, aligning system performance more closely with the parameters utilized in many published PEMF studies.
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3D Mapping “Magnetic X-Ray” Methodology
To create the 3D maps, we used a highly controlled robotic arm, called a gantry, to move two specialized magnetic sensors across an area measuring 30 inches by 80 inches where the PEMF devices were placed. The Scanning Process The robotic arm moved precisely to measure the magnetic field strength across a 3D grid:
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Data Collection and Software
We programmed the instrument (the oscilloscope) to detect the specific magnetic pulse we were looking for while rejecting electrical noise caused by the robotic arm's motors. Although the automated measurements are slightly different than if they were taken manually (because of the electrical filtering requirement), the relative difference in strength between all the mats remained accurate. Finally, dedicated plotting software took the raw data, smoothed out any remaining minor electrical interference, and then generated the visual map. The software can either show only the area measured (up to 5 inches) or create a projected view to estimate what the magnetic field would look like beyond that height. A separate manual measurement was required to determine how quickly the magnetic pulse rises or falls (called the 'slew rate' or dB/dT) for each mat, which was then used to generate a slew rate view. |