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MassaMAX MT339

MassaMAX · 4D · SL Track

MassaMAX MT339

The MT339 sits in the middle of MassaMAX's line with a three-year manufacturer warranty, a 4D mechanism on an SL track and a height range of about 5'0" to 6'4". It is the MassaMAX to pick when the warranty and a broad height fit matter more than the extra reach of the MT398. The open item is the route: no shipping-box size is stated, so ask the seller for the carton.

Height range5'0"–6'4"
Weight limit330 lb
Rollers / track4D · SL-track
Reclined lengthNot published
Narrowest doorNot published
Shipping weight229 lb
Price band $1,000–$2,000
Buy on Amazon

Prices change often; Amazon shows today's price. We earn from qualifying purchases.

Who it fits, and who should look elsewhere

A good fit if

  • Your tallest user is about 6'4" or shorter and your shortest is about 5'0" or taller; confirm either end with the seller.
  • Your heaviest user is under the stated 330 lb limit.
  • A three-year manufacturer warranty and 4D rollers on an SL track matter to you.

Look elsewhere if

  • Your tallest user is well over 6'4"; the rating stops there.
  • Your heaviest user is over 330 lb.
  • You need the carton size before you plan the route.

Everything MassaMAX publishes

Body fit

Recommended user height
5.0ft - 6.3ft
Maximum user weight
330lbs
Roller mechanism
4D
Track type
SL Track
Zero gravity (as stated)
Yes
Heat
Yes
Airbags
Yes

Size

Upright dimensions
Not published
Reclined dimensions
Not published
Minimum door width
Not published
Chair weight
192 pounds

Delivery & setup

Package dimensions
Ask the seller for the shipping-box size.
Package weight
229.3 lbs
Delivery
Not published
Assembly
Not published

Warranty, returns & power

Warranty
3 year manufacturer
Return policy
Not published
Voltage
110V-120V~ 60Hz
Wattage
120W
Amperage
0.1-1W
Power requirements
Not published

Three things to check first

!
Confirm the warranty

The MT339 lists a three-year manufacturer warranty. Ask what parts and labor it covers and who performs the repair.

!
Get the carton size

Ask the seller for the packed carton dimensions, then measure the route into the room.

!
Ask what you assemble

MassaMAX does not state what the buyer attaches. Ask the seller what arrives built and how many people are needed.

If the MT339 isn't quite right

Each of these is another chair we track. The lines compare published values only; this is not a ranking.

3D · 29.5" door
Osaki OS-3D Champ II
Osaki

Osaki OS-3D Champ II

Up to 264 lb3D massage mechanismSL-style Track
  • You want the delivery numbers in writing before you buy.
  • Lists a 29.5" minimum door width, its reclined size and its box size.
  • A 264 lb weight limit and no height range.
Price band $1,000–$2,000
Check price on Amazon See full specs
4D+ · 6'4"
Alfine A66
Alfine

Alfine A66

5'0"–6'4"4D+SL Track
  • You want 4D rollers with heat in two zones.
  • A 4D+ mechanism with lumbar and calf heat and a three-year service coverage.
  • The weight limit is given as both 300 lb and 380 lb, so ask the seller which applies.
Price band $3,000+
Check price on Amazon See full specs

The comparisons above are read from each chair's recorded values for the chairs we track. Check the current listing and terms before you buy.

Where these numbers come from

Read our full method
Sources for this chair
  • Model number, Package dimensions, Amazon "product dimensions" label, Chair weight, Package weight, Recommended user height, Maximum user weight, Track type, Roller mechanism, Zero gravity (as stated), Heat, Airbags, Warranty, Voltage, Wattage, Amperage: Amazon listing (the seller's own product page; structured extraction).
  • Amazon listing — Value source
  • Last checked Oct 8, 2026.
What we haven't checked
  • We haven't sat in this chair. We make no comfort or medical promise for any body type.
  • MassaMAX does not publish a upright dimensions for this chair.
  • MassaMAX does not publish a reclined dimensions for this chair.
  • MassaMAX does not publish a minimum door width for this chair.
  • MassaMAX does not publish a assembly for this chair.
  • MassaMAX does not publish a delivery for this chair.
  • Each model's specs carry a check date. After that date the page stops presenting the model as currently buyable and asks you to confirm availability on Amazon.

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