Does Amplitude or RPM Matter More?
Neither is inherently more important — they measure different things. Amplitude is the stroke's travel distance in millimeters; RPM (or PPM) is how many of those strokes happen per minute. A long-amplitude gun at a moderate RPM produces deep, slower percussion; a short-amplitude gun at a high RPM produces rapid, shallow vibration. Comparing either spec alone, without stall force, misses what actually happens under pressure.
The one thing to know: Amplitude (the distance the head travels per stroke, in millimeters) and RPM/PPM (how many of those strokes happen per minute) measure two different things, and higher numbers in either do not automatically mean a 'better' device. A short-amplitude gun spun to a very high RPM produces rapid, shallow vibration; a long-amplitude gun run at a moderate RPM produces deeper per-stroke displacement at a slower pace. Neither combination is universally superior — they are a tradeoff, and the honest comparison point is amplitude, RPM, AND stall force together, not any single number in isolation.
The range across popular models
Amplitude across the 16 models in our Stall Force Reality Index ranges from 7mm (Bob and Brad Q2 Mini, a compact device) to 18mm (TimTam All-New PowerMassager). Advertised RPM ranges typically run from about 1750 up to roughly 3200 across five speed settings. High amplitude and high RPM do not necessarily appear together on the same device — the TimTam has the highest amplitude but a comparatively modest 2500 RPM ceiling.
Why stall force is the missing third spec
Amplitude and RPM are the two specs every massage-gun listing leads with, but neither one tells you what happens when you actually press the device into muscle. Stall force — the amount of resistance, in pounds, at which the motor stops moving the arm — is the spec that answers that question, and it is the one manufacturers are least consistent about disclosing. A gun with a long, impressive-sounding amplitude can still stall out under firm real-world pressure if its motor is underpowered, while a shorter-stroke gun with a strong motor can hold its stroke length under load. Read the amplitude and RPM as marketing headlines; read stall force, when it is disclosed and verifiable, as the closer proxy for real-world firmness.
This page reports equipment-spec definitions only, not a health or safety claim. If you have an injury or medical condition, consult a licensed clinician before using a percussive therapy device.
Frequently Asked Questions
Neither is inherently more important; they measure different things and the better spec depends on what you're comparing devices for. Amplitude is the stroke's travel distance in millimeters; RPM (or PPM) is how many of those strokes happen per minute. A gun with a long amplitude at a moderate RPM produces deep, slower percussion, while a short amplitude at a high RPM produces rapid, shallow vibration.
Based on published specs across this dataset, amplitudes at or above 15-16mm (Theragun's line, TimTam, Achedaway) are on the high end, while 10-12mm (Renpho, Ekrin, standard Opove) is a common mid-range, and 7mm (Bob and Brad's Q2 Mini) is toward the compact/short end typical of pocket-sized devices.
It can feel intense as vibration, but that is a mechanically different sensation than a deep, longer-stroke percussion at a lower RPM. Whether one or the other is preferable is a matter of personal preference for sensation, not a case where one spec universally outperforms the other.
RPM is an easier, single number for marketing to lead with, while amplitude requires more context to appreciate. Several models in this dataset publish a clear RPM range while their amplitude, stall force, or both are harder to find or entirely undisclosed on the manufacturer's own page.