The Magnetic Frequency Spectrum is the second type of frequency to consider when it comes to PEMF. This is different from the more commonly discussed “pulses per second,” which is typically what most people mean when they talk about PEMF frequencies. Some PEMF brands do mention other frequencies their mats generate, but what they are really referring to is the magnetic frequency spectrum—often without defining it. This lack of clarity can make PEMF research confusing, as these two different frequency types are frequently mixed up or left unspecified.
What is the Magnetic Frequency Spectrum?
The magnetic frequency spectrum is determined by the width (duration) of an individual PEMF pulse. This differs from “pulses per second,” which only counts the number of pulses, regardless of their width.
For example:
- A pulse width of 0.01 seconds would correspond to a magnetic frequency of 100 Hz, if that pulse were repeated continuously.
- A pulse width of 0.001 seconds would correspond to 1000 Hz under the same condition.
Both of these could be pulsed at 8 Hz (meaning 8 pulses per second), but the first pulse would last 10 times longer than the second, resulting in a much lower magnetic frequency spectrum.
Why Does the Magnetic Frequency Spectrum Matter?
The magnetic frequency spectrum is one of the best ways to classify whether a PEMF device produces “Earth-Based Frequencies.”
PEMF is often compared to the Earth’s natural magnetic field and the Schumann Resonance, which has a base frequency of 7.83 Hz and harmonics at 14.3, 20.8, 27.3, 33.8 Hz, and higher (with decreasing intensity). While the Schumann Resonance is not PEMF—it is a continuous magnetic field—the 7.83 Hz fundamental frequency corresponds to a pulse width of 0.1277 seconds. PEMF devices with longer pulse widths are therefore closer to these Earth-based frequencies.
By contrast, shorter pulse widths can correspond to very high frequencies, such as:
- 5G: 450 MHz to 6 GHz
- RF (Radio Frequencies): 20 kHz to 300 GHz
These much higher frequencies are what many people typically consider undesirable EMFs. While some PEMF devices technically could generate signals in these ranges, most operate within the ELF (Extremely Low Frequency) to VLF (Very Low Frequency) spectrum.
At DrPEMFtherapy.com, we also test devices for electrosmog/dirty electricity, since some units do emit minor amounts of higher frequencies that may be undesirable for people looking to avoid extreme ranges like RF and microwave bands.
Testing the Magnetic Frequency Spectrum
The magnetic frequency spectrum can be tested using a spectrum analyzer, which the team at DrPEMFtherapy.com has used extensively to test different PEMF mats and devices. Another method is to measure the pulse width with an oscilloscope and manually calculate the frequency.
However, spectrum analyzer results are often misunderstood. This is because the analyzer uses Fast Fourier Transform (FFT) analysis—a mathematical method that reconstructs signals as combinations of continuous sine waves. Since PEMF signals are not continuous (they are pulsed on and off), the FFT generates the appearance of multiple harmonic frequencies that don’t actually exist in the original PEMF pulse.
In practice, what the FFT shows is how multiple continuous frequencies, stacked together, could recreate the same pulse pattern. The overlapping harmonics are an artifact of analysis, not a literal reflection of the PEMF device’s true magnetic waveform.
The only way to produce different magnetic frequency spectrums in a PEMF device is to use different pulse widths. Most mats use only one, but some devices employ multiple pulse widths. When evaluating these results, sensor choice also matters—different sensors may distort the signal (e.g., showing trailing edges due to slower response times), which further affects the FFT analysis.
When looking at a spectrum analyzer chart, the main peak is the most accurate representation of a device’s magnetic frequency spectrum. If a device uses only one pulse width, there will only be one true spectrum. Devices with multiple pulse widths will show multiple peaks, which is where spectrum analysis becomes useful.
Although spectrum analyzer results can be misleading, we at DrPEMFtherapy.com believe they are important to show—as long as they are interpreted in context. This prevents misuse by marketers, which unfortunately already happens in some cases.
PEMF Device Spectrum Ranges
| Device / Mode | 0–100Hz | 100–500Hz | 500–2000Hz | 2000–10,000Hz | 10,000Hz+ |
|---|---|---|---|---|---|
| HealthyLine Plat | X | X | X | ||
| Jet | X | ||||
| Basic Controller | X | ||||
| Omi Standard Mat | X | ||||
| Omi Beyond | X | ||||
| Bemer | X | ||||
| Bemer Sleep Mode | X | X | |||
| BioBalance | X | X | X | ||
| FlexPulse | X | ||||
| HigherDose | X | ||||
| MiraMate | X | ||||
| NeoRhythm | X | ||||
| IMRS Omnium 1 (full mat) | X | ||||
| IMRS Omnium 1 (pads) | X | ||||
| Qi Coil | X | ||||
| QRS | X | ||||
| Resona Health | X | ||||
| Sota | X | ||||
| AMT 01 | X |
HealthyLine (aka Healthy Wave) Magnetic Frequency Spectrum
HealthyLine (also known as Healthy Wave) mats have the lowest magnetic frequency spectrum of all the mats tested, making them the most “Earth-Based Frequency” mats. This is due to their use of some of the longest pulse widths among PEMF devices. Most of their models run at a 16 millisecond (ms) pulse width.
On the Multi-Wave mat, this is referred to as the Medium (M) pulse width, though users can also choose the Fast (F) pulse width at ~5 ms or the Ultra Fast (UF) pulse width at ~0.5 ms. This provides flexibility: you can use the longer pulse widths for more Earth-based frequencies or the shorter pulse widths for higher magnetic frequencies.
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Spectrum of the basic controller – the long pulse width produces frequencies under 100 Hz, close to Earth-based ranges. All standard mats and the Multi-Wave’s M setting fall into this category.
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Sine wave and Square wave at the Fast pulse width – waveform type doesn’t change the frequency spectrum, but the quicker pulse width shifts the range higher.
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Ultra Fast (UF) pulse spectrum – centered above 1250 Hz, showing how much higher the range becomes compared to the M pulse width.
Overall, we like that the Multi-Wave gives you the ability to choose the magnetic frequency spectrum you want, from true Earth-based to significantly higher ranges. The difference is quite broad, with the UF pulse being 30x faster than the M pulse.
OMI PEMF Mats Magnetic Frequency Spectrum
The OMI Standard Mat uses a pulse width of around 2 ms, while the OMI Pad and OMI Ring use shorter widths around 1 ms. These correspond to magnetic frequency spectrums of ~500 Hz (mat) and ~1000 Hz (pad/ring).
The OMI Beyond is unique, as its three waveforms (Sine, Square, Sawtooth) each vary in pulse width, giving you multiple magnetic frequency spectrums during a session:
- Square wave: ~1.5 ms pulse width
- Sine wave: cycles through ~2 ms, 1 ms, and ~0.5 ms pulse widths
- Sawtooth wave: cycles through ~0.5 ms, 1 ms, 1.5 ms, and 2 ms pulse widths
This variation expands the frequency range across sessions.
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OMI Standard Mat – 2 ms pulse width, main peak centered below 750 Hz.
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OMI Beyond Square wave – spectrum peak just below 1000 Hz, closer to 750 Hz.
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OMI Beyond Sine wave – three overlapping spectrums from its three pulse widths, clearly showing multiple peaks.
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OMI Beyond Sawtooth wave – four overlapping spectrums from 0.5–2 ms pulse widths (~500 Hz, 1000 Hz, 1500 Hz, 2000 Hz).
Overall, the OMI Beyond expands the spectrum through varied waveforms, providing a wider range of frequencies compared to the Standard Mat, with equal intensity across its options.
Bemer 3000 Magnetic Frequency Spectrum
The Bemer 3000 uses a single pulse burst with varying pulse widths. The quickest pulse widths—near the end of the pulse—are the most prominent. From the spectrum analyzer chart, the shortest pulse widths appear to fall between 0.5 and 0.75 milliseconds, as the peak lies just under 1500Hz.
Although lower frequencies exist when the pulse widths are longer, they are less intense, and therefore less prevalent in the overall spectrum. Because of the Bemer’s unique pulse burst with varying widths, the spectrum analyzer results are somewhat complex—some peaks blend with FFT-generated harmonics, making it harder to isolate the true peaks.
There are likely 10+ varying pulse widths within a single Bemer pulse, meaning users are exposed to a variety of frequencies across the magnetic frequency spectrum.
Magnetic Frequency Spectrum of the Bemer 3000:
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Bemer Pro Magnetic Frequency Spectrum
The Bemer Pro produces two distinct magnetic frequency spectrum patterns—one from its main pulse, and another from its sleep pulse.
- Compared to the Bemer 3000, the main pulse spectrum lies lower, meaning the pulses are marginally wider. Within a single Bemer pulse, there are multiple pulse widths that generate a variety of frequencies, though the quickest ones remain most dominant since they are more intense.
- The sleep pulse is very different, with its spectrum lying below 500Hz, compared to just under 1500Hz for the standard pulse. This aligns well with its intended use, as lower frequencies are intuitively more suitable for sleep.
Overall, the Bemer Pro delivers a good variety of frequencies within its spectrum, though in standard mode, you always receive both high and low frequencies together, skewed toward the higher ranges.
Main Pulse Spectrum:
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Sleep Pulse Spectrum:
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BioBalance by Dr. Pawluk Magnetic Frequency Spectrum
The BioBalance is unique because it does not use on/off PEMF pulses like most devices. Instead, it uses a continuous EMF carrier signal—called the BioBalance signal.
Because the BioBalance runs as a continuous EMF, the FFT results show a true representation of the frequency peaks, without harmonics like those seen in pulsed devices.
The signal contains four distinct frequencies:
- 300Hz
- 600Hz
- 800Hz
- 1000Hz
Although 400Hz is sometimes advertised, this was not present in our testing. Each frequency corresponds to one of the four pulse widths that make up the BioBalance signal.
Depending on the program:
- The first three programs run the BioBalance signal with its carrier frequency.
- The last three programs use a continuous EMF without the carrier, producing only the single frequency associated with the current pulse width of the advertised frequency.
- The “Sweep” program runs through 1Hz–1000Hz, exposing the user to the full spectrum. (Although technically, these last three modes should be classified as magnetic therapy, not PEMF.)
Overall, the BioBalance can deliver a broad range of frequencies, depending on program selection.
Magnetic Frequency Spectrum of BioBalance:
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FlexPulse by Dr. Pawluk Magnetic Frequency Spectrum
The FlexPulse uses ultra-fast pulses, which vary depending on the program:
- General program: 0.1 ms pulse width → ~10,000Hz
- 40Hz program: ~0.04 ms pulse width → ~25,000Hz
- 999Hz program: ~0.012 ms pulse width → ~83,000Hz
Some PEMF devices, including the FlexPulse, use these very short pulses to achieve higher intensity, though as discussed in my FlexPulse review, a short duration and low duty cycle do not necessarily translate to higher energy delivery.
The spectrum analyzer image below is centered around 6000Hz, the peak is difficult to identify as it blends in with the harmonics created by the FFT, but through the 0.1ms pulse we can calculate the peak resides at ~10,000Hz.
Magnetic Frequency Spectrum of FlexPulse:
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Higher Dose Magnetic Frequency Spectrum
The Higher Dose PEMF mat uses a single pulse width of about 16 ms, which places its magnetic spectrum under 100Hz.
This longer pulse width is very close to Schumann resonance frequencies, making the Higher Dose mat one of the more “earth-based” devices in terms of spectrum alignment.
Although it offers fewer PEMF functions overall, the long pulse design makes it notable for those interested in natural, low-frequency resonance.
Magnetic Frequency Spectrum of Higher Dose:
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MiraMate Big Magic & Mini PEMF Magnetic Frequency Spectrum
Both the MiraMate Big Magic and MiraMate Mini use very fast pulses of about 0.1 ms, creating a spectrum around 10,000Hz.
- This short pulse width enables the devices to generate high gauss output, though with a low duty cycle.
- In addition, both devices produce a secondary RF pulse burst in the MHz range. Our tests suggest this is centered around 6–7MHz, though other frequencies may also be present.
This combination makes the MiraMate devices unique, delivering the highest-frequency spectrum of any PEMF devices tested.
Magnetic Frequency Spectrum of MiraMate:
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NeoRhythm Magnetic Frequency Spectrum
The NeoRhythm uses a pulse width of just under 0.1 ms, placing its spectrum above 10,000Hz.
Unlike other devices that vary across programs, NeoRhythm delivers the same high-frequency spectrum across all PEMF sessions, regardless of the selected frequency or program.
Magnetic Frequency Spectrum of NeoRhythm:
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IMRS Omnium 1, IMRS 2000 & IMRS Prime Magnetic Frequency Spectrum
The IMRS mats all share the same basic program structure:
- Sawtooth wave on the full mat
- Square wave on the pillow/applicators
Sawtooth Wave (mat):
- Pulse length: ~5.25 ms
- Spectrum: ~190Hz
- Most of the extra spikes in FFT are artifacts, not true harmonics. Some higher frequencies occur during the rise, but they are negligible in intensity.
Square Wave (pillow/applicators):
- Each pulse: ~0.033 ms
- Pulse burst: ~50 ms long, ~1500 pulses
- Spectrum: ~29,750Hz
This design provides a range of pulse widths:
- Longer sawtooth pulses (190Hz range) for mat use
- Very short, high-frequency square pulses (29,750Hz) for applicators
Thus, the IMRS offers minimal variation between polar opposites of the frequency spectrum, though neither truly aligns with Schumann resonance.
The majority of the spikes you are seeing in the spectrum analyzer images below are the harmonics created by the FFT analysis and are NOT harmonics within the PEMF pulse. This is a common misunderstanding many Swiss Bionic Solutions marketers have, as material showing spectrum analyzer results for the IMRS PEMF mats have been published in the past. Incorrectly, Swiss Bionic Solutions marketers think the harmonics created by the FFT analysis are frequencies found in the device, which we previously explained is untrue.
While the sawtooth wave does contain some other frequencies within the sawtooth pattern, the intensity of these is minimal and they do not have any meaningful contribution to the magnetic frequency spectrum in our testing.
Magnetic Frequency Spectrum of IMRS:
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Qi Coil Magnetic Frequency Spectrum
The Qi Coil delivers the broadest spectrum variety of any PEMF device tested.
- Its programs cycle through many different pulse widths, producing constantly changing frequencies.
- The underlying carrier pulse in many programs runs around 187,000Hz.
- The FFT charts are compilations of the program sequences—new frequencies appear constantly, even when the pattern looks repetitive.
Two programs—Soothe and Qi Energy Activation—are based almost entirely on the 187,000Hz pulse burst. Most other programs, however, provide a wide range of frequencies, with dominant peaks typically around 16,000Hz, alongside many others above and below.
Unlike many devices where harmonics dominate, most Qi Coil frequencies appear to be genuine. For users seeking maximum spectrum variety, Qi Coil is unmatched.
Magnetic Frequency Spectrum of Qi Coil:
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QRS (aka PureWave) Magnetic Frequency Spectrum
The QRS / PureWave PEMF mat produces pulses with a fixed width of 0.5 ms, yielding a spectrum around 2000Hz.
- While the pulse patterns vary between programs, the pulse width remains constant.
- Pulses always occur every 4 ms, regardless of program.
This means the QRS is limited in frequency spectrum, with only a single consistent peak.
Magnetic Frequency Spectrum of QRS / PureWave:
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Resona Health Magnetic Frequency Spectrum
The Resona Health device offers many program variations, but beneath the surface, all of them rely on the same underlying high-frequency pulse burst at around 682,000Hz.
This makes the spectrum highly restricted compared to devices like the Qi Coil, which offer wide frequency variety. While program changes affect pulse patterning, the fundamental spectrum does not change.
Magnetic Frequency Spectrum of Resona Health:
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Sota Magnetic Pulser Magnetic Frequency Spectrum
The Sota Magnetic Pulser produces pulses with a width just over 1 ms, corresponding to a spectrum slightly under 1000Hz.
- In the standard mode (older model), it pulses once every 5 seconds.
- The newer model adds a quicker pulse mode, though with the same width, meaning the spectrum remains unchanged.
This device is designed for ultra-high intensity, rather than spectrum variation.
Magnetic Frequency Spectrum of Sota Magnetic Pulser:
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AMT-01 Magnetic Frequency Spectrum
The AMT-01 is not a PEMF device but a magnetic therapy device.
- Runs a continuous EMF at 60Hz (North America) or 50Hz (Europe).
- My testing in North America confirmed the 60Hz peak.
Magnetic Frequency Spectrum of AMT-01:
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