Osaki 4D Optim vs Real Relax PS6500
Two of the full-body massage chairs in our best full-body massage chairs: osaki, real relax, human touch, bodyfriend & kahuna comparison, lined up spec by spec. Every figure comes from the manufacturer pages linked below, and the scores use the same published formula as the full ranking.
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Best for: 53 in SL-track, voice control
Check price at AmazonBest for: 4D with long SL-track and 300 lb limit
Check price at AmazonSpec-by-spec comparison
Green marks the better published figure. "Not listed" means the manufacturer doesn't publish it.
| Spec | Osaki 4D Optim | Real Relax PS6500 | Weight |
|---|---|---|---|
| Massage mechanism (2D–5D)The roller mechanism's dimension as the maker lists it: 2D rollers move up/down and side to side, 3D adds depth, 4D adds variable speed and rhythm. For dual-mechanism chairs we rank the upper mechanism. | 4 D | 4 D | 20% |
| SL-trackYes when the maker lists an SL-track (S- and L-track), which follows the spine and continues under the seat to the glutes or hamstrings. | Yes | Yes | 15% |
| Track lengthRoller track length in inches, where the maker states it. Most makers don't. | 53 in | Not listed | 10% |
| Air cells / airbagsThe number of air cells or airbags the maker lists for compression massage. | 28 | 28 | 15% |
| Zero gravityYes when the maker lists a zero-gravity recline position on the product page. | Yes | Yes | 10% |
| HeatYes when the maker lists heat therapy (lumbar, calf, foot or heated rollers). | Yes | Yes | 10% |
| Foot rollersYes when the maker lists foot or sole rollers. | Yes | Yes | 10% |
| Max user weightThe maker's maximum user weight or load. | 275 lb | 300 lb | 10% |
| Track type | SL-track, 53 in | SL-track | info |
| Massage mechanism | 4D | 4D | info |
| Zero gravity | 3-stage | 3-level | info |
| Heat | Lumbar and foot heat | Waist/lower back heat | info |
| Chair weight | 251.3 lb | 205.0 lb (net) | info |
| User height range | Not published by the maker | 5-6.4ft | info |
| RecoverPick score | 7.8/10 | 7.8/10 | 100% |
Where each one comes out ahead
Osaki 4D Optim
No scored spec where it is strictly ahead; its case rests on the strengths below.
What we like
Watch out for
Real Relax PS6500
Better published figure on: Max user weight.
What we like
Watch out for
- Track length not published by Real Relax
Verdict
Real Relax lists a 300 vs 275 lb limit and 205 vs 251.3 lb chair weight; Osaki lists a 53 in track length. Both list 4D, SL-track, 28 air cells and 3-level zero gravity.
- Osaki 4D Optim: Osaki: Osaki 4D Optim product page
- Osaki 4D Optim: Osaki: Osaki 4D Optim feature and spec sheet (loaded on the product page)
- Real Relax PS6500: Real Relax: PS6500 product page