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Massage Chair Comparison: Infinity Dynasty 4D vs Kahuna SM-9300

Massage Chair Comparison: Infinity Dynasty 4D vs Kahuna SM-9300

Today we're comparing two of our higher end massage chairs, the Infinity Dynasty 4D and Kahuna SM-9300. The Infinity Dynasty 4D massage chair offers wide versatility to personalize your massage needs. Likewise, the Kahuna SM-9300 massage chair provides 4D massage rollers for easy adjustments.

Both of these models are from well-known brands that have been in the industry for years. Both models are in the upper price spectrum and are very well equipped, as you'll see below.

A massage chair is a big investment, so we want to help you make the best decision for you, your back, and your budget. In this comparison, you will find information about these two models that could help you decide if either chair is right for you.

Infinity Dynasty 4D Massage Chair Top Features

The Infinity Dynasty comes with numerous high-end features to help you alleviate stress and unwind your muscles.

4D Massage Technology
Thanks to the Dynasty’s 4D massage technology, users can personalize the massage experience and intensity by a simple adjustment of the depth, width, and length. 4D massage is found in many of the best full body massage chairs.

49-Inch L-Track
Infinity offers their signature 49-inch L-track design to guide the chair’s massage rollers from the head down to the thigh area.

Body Scanning
The massage chair allows for further personalization with the advanced body scanning technology. Prior to the massage, it detects your height and adapts to ensure contact with all your pressure points.

Automatic Footrest Extension
Excelling in accommodating users of different sizes, the chair’s footrest automatically extends to fit a variety of leg lengths.

Airbag Therapy
Airbag positioning throughout the chair simulates the touch of real human hands. You can even rotate the shoulder airbags up and down for a better fit.

Zero Gravity
The zero-gravity design of the Infinity Dynasty positions users in a more natural way. As the name implies, the chair reclines and angles users much like the way astronauts are when taking off, decompressing the spine and promoting greater circulation.

Heat Therapy

Infinity Dynasty 4D Heat Therapy

With this massage chair, users experience lumbar heating that improves circulation and loosens up the muscles.

The foot rollers on the Dynasty replicate reflexology, going along with the theory behind the ancient healing art that pressure points on the feet correspond with systems and organs throughout the body.

Chromotherapy Lights
Alongside either side of the Infinity Dynasty massage chair are chromotherapy lights. Simply turn off the lights in the room, and you can enjoy calming lights to create a different ambiance, choosing from various colors, brightness levels, and themes.

Air Ionizer
In the headrest are tiny vents that employ air ionizer technology, so you have a stream of clean air during your massage.

Bluetooth Technology
The massage chair features Bluetooth technology that works with Android and iOS devices. You can listen to anything you need to enhance your experience, such as music, podcasts, etc.

USB and Wireless Charging Stations

Infinity Dynasty 4D USB and Wireless Charging Stations

Thanks to the diverse design of the Infinity Dynasty 4D massage chair, you can utilize the USB charging station beneath the waist airbag on the left side or the wireless charging pad.

Rhythm Technique
With the rhythm technology, you can sync up the massage chair to go along with the rhythm of your music.

Voice Control

Infinity Dynasty 4D Voice Control

You don’t have to lose your perfect position to adjust anything, thanks to the intelligent voice control function. This allows you to operate some massage programs and customize some settings hands-free.

Space-Saving Technology
If space is a factor, the Dynasty has a zero-wall design. This means it can move forward before your massage starts, letting you place it closer to the wall and saving you space.

Infinity Dynasty Massage Chair Auto Program Options

With the Infinity Dynasty, you can choose from 12 different auto programs:
  • Sports Refresh
  • Extension
  • Rest & Sleep
  • Working Relief
  • Neck & Shoulder
  • Waist & Spine
  • Deep Shiatsu
  • Healthy Breath
  • Massage Extend
  • Relaxation
  • All Air
  • Demo

Infinity Dynasty Pros and Cons

  • Zero gravity reclining
  • Chromotherapy lights
  • Body scanning technology
  • 4D massage rollers
  • Lumbar heating
  • USB and wireless charging
  • Bluetooth technology
  • Reflexology foot rollers
  • Intelligent voice control
  • Airbag massage
  • User height range: 5'0" - 6'6"
  • Maximum weight capacity: 300 pounds
  • Only a few colors available
  • High end price tag
  • Requires assembly
  • Not recommended if you weigh over 300 pounds
Infinity Dynasty 4D Massage Chair
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Kahuna SM-9300 Massage Chair Top Features

The Kahuna SM-9300 shares some similarities with the Dynasty. At the same time, the chair has other unique features worth considering.

4D Massage Rollers
The 4D massage rollers in the SM-9300 allow you to tailor your experience. You'll enjoy the ability to control the pressure and speed of the massage rollers, as your body will likely get used to a certain feel over time.

Thermal Heat Therapy
The SM-9300 is equipped with infrared heated massage rollers that will help loosen those tired or tense muscles.

Kahuna SM-9300 Thermal Heat Therapy

This chair also comes with heated foot rollers.

Auto Body Scan
Another similar benefit the SM-9300 shares with the Dynasty is the automatic body scan. The chair accurately reads the shape of your body, delivering pressure with greater accuracy.

Auto Leg Extension
For more personalization, the massage chair offers leg extensions to make things more comfortable for users with different leg lengths.

Airbag Massage
Massage airbags are placed throughout the chair to better address various areas of the body.

Zero Gravity Positions

Kahuna SM-9300 Zero Gravity Positions

The Kahuna SM-9300 offers multiple zero gravity positions, setting you up in a more comfortable position to relieve pressure from the spine.

Arm Massage
Blood flow is further improved in this massage chair thanks to the airbags that perform an arm massage.

Foot Roller Massage
The foot roller section addresses the heels up to the toes for a well-rounded, stress-relieving massage session.

Bluetooth Technology
With Bluetooth technology, you can sync up your iOS or Android device to play your favorite music through the built-in speakers.

Music Sync
There’s also music therapy technology with the Kahuna SM-9300 massage chair that lets users sync the massage with their music.

Voice Recognition
Another feature the SM-9300 shares with the Infinity Dynasty is voice recognition technology. The chair is programmed to understand various commands for hands-free operation.

Space Saving Technology
This massage chair offers you versatility on where you want to place it, thanks to the space-saving design.

Kahuna SM-9300 Space-Saving Technology

The chair can still fully recline as long as the headrest is positioned at least 3 inches from the wall.

Kahuna SM-9300 Massage Chair Auto Program Options

Similar to the Dynasty, the Kahuna SM-9300 massage chair has several automatic programs:
  • Recovery
  • Relief
  • Yoga Stretching
  • Renew
  • Music Sync
  • End of Day
  • Special – Office Person
  • Powerful Day
  • Golfer Mode
  • Senior Mode
  • Dynamic Sports
  • Healing

Kahuna SM-9300 Pros and Cons

  • Infrared heated massage rollers
  • Zero gravity recline design
  • Airbag massage
  • 4D massage rollers
  • Automatic body scan
  • Acupressure arm massage
  • Voice recognition
  • Bluetooth compatibility
  • Removable headrest cushion
  • Auto leg extension
  • User height range: 5'1" - 6'3"
  • Maximum weight capacity: Under 350 pounds


  • Enclosed foot massager design
  • Higher price point
  • Only 2 colors to choose from
  • Assembly required
Kahuna SM-9300
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Both the Infinity Dynasty and the Kahuna SM-9300 are luxury-level massage chairs with much to offer. Each model provides several potential benefits to accommodate a variety of users.

Each provides heat therapy as well, although in different ways. The Dynasty focuses on lumbar heating relief, and the SM-9300 offers heated massage rollers and heated feet.

It’s always beneficial to compare the features of each model to find which one better suits your personal massage needs. It's even more beneficial to physically sit in a chair and try it for yourself before making your buying decision.

Thank you for taking the time to read this comparison, we really do appreciate you. If you have any questions feel free to call us at 800-566-2798. As always, thank you for reading!

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We do not provide medical advice. The content of this article, including text, graphics, and other material, is for informational purposes only. It is not intended to be a substitute for professional medical advice, diagnosis, or treatment. Always seek the advice of your physician or other qualified health provider with any questions you may have regarding a health condition. Never disregard professional medical advice or delay in seeking it because of something you have read in this article.

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