3-Year
Limited Warranty
- Year 1: In-home service, replacement parts, and labor
- Years 2–3: Replacement parts only
Osaki Grand Duo 4D Massage Chair
Dual 4D massage mechanisms with intelligent full-body personalization
The Osaki Grand Duo is built for customers who want a high-end massage chair with separate 4D mechanisms for the upper and lower body. Its dual-roller design works across the neck, back, glutes, and hamstrings while a 53-inch SL-Track, smart body scanning, air compression, calf kneading, and foot rollers add broader full-body coverage.
An integrated fingertip sensor provides wellness readings that help guide the chair’s AI-assisted massage selection. With 41 automatic programs, Zero Gravity recline, one-inch wall clearance, voice control, a sliding side panel, heat, Bluetooth audio, and modern charging options, the Grand Duo is designed for a highly adjustable home massage experience.
Best for
Users who want strong upper- and lower-body roller coverage, extensive air compression, advanced leg and foot massage, and premium convenience features in one chair.
Massage feel
The dual 4D system creates a layered massage experience, with one mechanism focusing on the neck and back while the second works through the glutes and upper hamstrings.
Room fit
The space-saving recline requires approximately one inch behind the chair, but the Grand Duo is large and heavy. Measure the room, doorway, hallway, stairway, and delivery path before ordering.
Key massage features
These are the Grand Duo features that most strongly shape its massage coverage, intensity, and overall user experience.
Duo Tech 4D + 4D Massage System
The Grand Duo uses two independent 4D massage mechanisms so the chair can work on the upper and lower body at the same time. The upper mechanism travels through the neck and back, while the lower mechanism adds roller coverage around the glutes and upper hamstrings.
- Separate upper- and lower-body 4D roller mechanisms.
- Adjustable depth, speed, rhythm, and pressure for a more customized feel.
- Designed for broader simultaneous coverage than a conventional single-mechanism chair.
AI-Assisted Wellness Sensor and 41 Programs
A fingertip sensor built into the armrest displays wellness readings such as heart rate, blood oxygen, microcirculation, and fatigue indicators. In AI mode, the chair uses this feedback to help select an appropriate program from its library of 41 automatic massage options.
- Provides on-chair wellness feedback before an AI-assisted session.
- Helps narrow the program selection without requiring manual browsing.
- Intended for relaxation and general wellness use, not medical diagnosis or monitoring.
53-Inch SL-Track with Smart Body Scan
The extended SL-Track follows the natural curve of the back and continues beneath the seat toward the glutes and upper hamstrings. Before the massage begins, smart body scanning helps align the roller path with the user’s shoulder position and body shape.
- Extended massage path from the neck through the lower body.
- Combines spinal contouring with longer under-seat coverage.
- Body scanning helps improve roller positioning for different users.
62-Cell Full-Body Air Compression
Sixty-two air cells provide rhythmic compression across multiple body zones. The three-segment arm and palm design creates more detailed pressure around the hands and arms, while the remaining air cells support the shoulders, waist, hips, calves, and feet.
- Layered compression across upper- and lower-body areas.
- Three-zone arm and palm airbags for more focused contact.
- Works alongside the dual roller system for a fuller massage session.
Dedicated Calf and Foot Massage
The lower-leg system combines outer calf kneading, two calf rollers, eight calf airbags, four foot rollers, and sixteen foot airbags. Together, these components provide rolling and compression across the calves, soles, sides of the feet, heels, and Achilles area.
- Two calf rollers with kneading and air compression.
- Four foot rollers for broad contact under the soles.
- Useful for customers who spend long hours standing, walking, or working on their feet.
Zero Gravity Recline with One-Inch Clearance
Zero Gravity recline changes the body angle to create a more supported and relaxed position during massage. The chair also moves forward as it reclines, allowing full recline with approximately one inch of space behind the chair.
- Supports a more evenly distributed reclined position.
- Space-saving movement reduces the required rear clearance.
- Always verify the full reclined footprint and delivery access before purchase.
Additional comfort and control features
These supporting features make the Grand Duo easier to enter, adjust, and enjoy as part of a regular home relaxation routine.
Sliding Side Panel
A powered side panel slides open to create easier access when entering or leaving the chair, especially for users who prefer a wider entry path.
Automatic Footrest Extension
The legrest extends up to seven inches to accommodate different body heights, with listed support for users up to approximately 6'3".
Targeted Heat and Heated Shawl
Built-in warmth complements the roller and air massage, while the flexible heated shawl can be positioned over the chest or along the back.
Intelligent Voice Control
Supported chair functions can be adjusted with voice commands, allowing changes without reaching for the main remote.
Quick Side Controls
Convenient controls along the armrest provide fast access to commonly used massage and recline adjustments.
Smart Body Scan
The chair scans shoulder position and body shape before the session to help place the rollers more accurately.
Chromotherapy LED Lighting
Integrated multicolor LED lighting adds a soft ambient effect around the chair during relaxation.
Negative Ionizer
A built-in ionizer operates around the seating area as an additional environmental comfort feature.
Bluetooth Speakers
Built-in speakers allow users to listen to music, podcasts, audiobooks, or guided relaxation from a paired device.
Aromatherapy
The integrated aromatherapy feature allows fragrance to become part of the overall massage environment.
Wireless Charging
A wireless charging surface provides a convenient place to recharge compatible phones during a massage session.
USB Charging Port
The integrated USB port provides another practical charging option for compatible personal devices.
Before you choose the Osaki Grand Duo
The Grand Duo offers extensive technology and a large massage footprint, but it should also fit your body, room, and delivery path. Review the chair dimensions, 33.5-inch minimum doorway requirement, 332.3-pound chair weight, warranty coverage, delivery method, and return terms before purchase.
- Measure the final placement area in both upright and reclined positions.
- Confirm doorway, hallway, stairway, elevator, and turning clearance.
- Review whether curbside, threshold, or in-home delivery is appropriate for your location.
- Contact Tittac for help comparing massage intensity, body fit, delivery, warranty, and setup expectations.
Osaki Grand Duo FAQ
What is different about the Grand Duo’s dual 4D system?
Instead of relying on one roller mechanism, the Grand Duo uses separate 4D mechanisms for the upper and lower body. This allows the chair to massage the neck and back while also providing roller coverage around the glutes and upper hamstrings.
Does the AI sensor provide a medical diagnosis?
No. The fingertip sensor provides wellness-oriented readings and helps the chair select a massage program. It is not a medical device and should not replace professional medical evaluation, diagnosis, or monitoring.
How much space does the Osaki Grand Duo need behind it?
The chair is listed with space-saving recline that requires approximately one inch behind it. You should still measure the complete upright and reclined footprint before choosing the final location.
What user size can the Grand Duo accommodate?
The listed maximum user weight is 280 pounds, and the automatic legrest extension is designed to support users up to approximately 6'3". Comfort and fit can still vary by shoulder width, torso length, and personal preference.
Can Tittac help me choose the Grand Duo without a showroom visit?
Yes. Tittac can review massage style, chair dimensions, doorway clearance, delivery options, warranty coverage, and return questions with you by phone, text, or chat before you order.
Get help choosing the right massage chair
Whether you visit our showroom or order from out of state, Tittac can help you review chair size, massage style, delivery options, warranty coverage, and return questions before you buy.
- Compare massage style, chair size, and comfort features before ordering.
- Ask about delivery options, setup expectations, warranty coverage, and return details for your location.
- Get help by phone, text, chat, or showroom visit depending on where you live.
Need help before ordering? Talk with Tittac before you choose your massage chair.
Local customers can visit the showroom. Out-of-state customers can still get help by phone, text, or chat before ordering.
Specifications
| Recommended Weight Limit | 280 lbs |
|---|---|
| User Height Range | Up to approximately 6'3" |
| Seat Width | 21.0" |
| Shoulder Width | 24.5" |
| Minimum Doorway Size | 33.5" |
| Will Fit Through Standard Household Doorways? | Measure carefully; opening must be at least 33.5" |
| Chair Dimensions | |
| Chair Dimensions - Upright | 33.5" W x 65.7" L x 48.5" H |
| Chair Dimensions - Reclined | 33.5" W x 70.9" L x 34.6" H |
| Distance to Wall | Approximately 1" |
| Chair Weight | 332.3 lbs |
| Package Information | |
| Package Dimensions - Box 1 | 33.5" W x 50.2" L x 51.4" H |
| Package Dimensions - Box 2 | 16.9" W x 29.6" L x 41.8" H |
| Package Weight - Box 1 | 340.6 lbs |
| Package Weight - Box 2 | 56.0 lbs |
| Massage System | |
| Massage Track Type | 53" SL-Track |
| Roller Type | Dual 4D + 4D mechanisms |
| Roller Glute Massage | Yes |
| Body Scan Technology | Yes |
| Calf Massage | Outer calf kneading, 2 calf rollers, 8 airbags |
| Foot Massage | 4 foot rollers, 16 airbags |
| Programs & Comfort | |
| Automatic Programs | 41 |
| Zero Gravity | Yes |
| Heat | Targeted heat with heated shawl |
| Airbags | 62 |
| Ottoman Length Adjustment | Automatic, extends up to 7" |
| AI-Assisted Program Selection | Yes, with fingertip wellness sensor |
| Controls & Convenience | |
| Voice Control | Yes |
| Side Controls | Quick-access armrest controls |
| Sliding Side Panel | Yes |
| Bluetooth Speakers | Yes |
| Chromotherapy LED | Yes |
| Aromatherapy | Yes |
| Charging | Wireless charger and USB port |
| Power Supply | 110 - 120V |
| Rated Frequency | 50 / 60Hz |
Please measure your room, doorway, hallway, stairway, elevator, and delivery path before ordering. The Grand Duo is a large, heavy chair and may require professional delivery planning or partial disassembly to move through some residential entrances.
Osaki Massage Chair Warranty
Osaki massage chairs include a manufacturer limited warranty covering eligible defects in materials and workmanship during normal residential use. Coverage begins on the original purchase date and applies only to the original purchaser.
Warranty Included With Your Chair
The warranty included with this model is shown in the preselected Warranty option above the Add to Cart button. That is the coverage that applies to your purchase and it is included at no additional charge.
Osaki Warranty Coverage by Model
5-Year
Limited Warranty
- Years 1–3: In-home service, replacement parts, and labor
- Years 4–5: Replacement parts only
Osaki warranty terms vary by model. The two plans above are shown for reference only and are not optional upgrades. Only the warranty displayed in the preselected Warranty option for this product applies to your order.
What Is Not Covered
- Physical, accidental, or cosmetic damage
- Commercial, corporate, rental, institutional, or other non-residential use
- Misuse, neglect, improper maintenance, or failure to follow the manufacturer’s instructions
- Unauthorized repairs, alterations, modifications, or use of non-approved replacement parts
- Damage caused by electrical disturbances, power surges, improper voltage, or loss of power
- Environmental damage, including rust, corrosion, fire, flood, wind, hail, earthquake, or tornado
- Shipping, delivery, moving, or handling damage
- Normal wear and cosmetic aging, including fading, fabric pilling, stitching, Velcro, and zippers
- Products purchased from an unauthorized reseller or without valid proof of purchase
Osaki warranties are non-transferable and apply only to the original purchaser. Temporary loss of use while the chair is being inspected, serviced, or repaired is not covered.
Need Warranty Service?
Contact TITTAC Customer Support with your order number and a clear description of the issue. Photos or videos may be requested to help identify the problem. Our team will review the information and help coordinate the appropriate warranty service with Osaki.
Shipping, Exchanges & Returns
Review the delivery options, inspection requirements, and 30-day exchange and return terms for TITTAC massage chairs.
Free Curbside Freight Delivery
Massage chairs include free curbside freight delivery to the 48 contiguous United States. Delivery is generally estimated at 7 to 10 days, but timing may vary by product availability, destination, and freight carrier schedule.
Curbside delivery is made to the curb, driveway, or nearest safe exterior location accessible by the freight truck.
Curbside delivery does not include:
- Moving the chair inside the home
- Stairs, upper floors, or room placement
- Unpacking or assembly
- Removal of boxes and packaging materials
The customer is responsible for arranging sufficient help and equipment to move the chair from the delivery location into the home.
White Glove Delivery
White Glove Delivery is available for an additional charge. Pricing and included services vary by chair model, delivery address, and local service provider.
- The chair is delivered through a local delivery and assembly provider
- The provider contacts the customer to arrange an appointment
- In-home delivery and assembly are provided according to the confirmed service level
- Stairs, room placement, unpacking, and packaging removal must be confirmed in advance
White Glove Delivery generally adds 7 to 10 days to the regular delivery estimate. All White Glove charges are non-refundable once the service has been arranged.
Alaska & Hawaii
Free shipping does not apply to Alaska or Hawaii. Please contact TITTAC before ordering to confirm available delivery options and receive a freight quote.
Inspect Your Delivery
Inspect the packaging and visible condition of the chair before signing the delivery receipt.
- Note all visible damage clearly on the delivery receipt
- Take photos of the packaging, shipping labels, damage, and receipt
- Contact TITTAC as soon as possible
- For severe damage, contact TITTAC before refusing delivery whenever possible
Signing without a damage notation may limit the ability to file a successful freight claim. Concealed damage or functional issues discovered after unpacking should be reported promptly.
30-Day Exchanges & Returns
A massage chair may be requested for exchange or return within 30 days from the purchase date. TITTAC approval and return instructions are required before the chair is shipped back.
Return for a Refund
- The customer is responsible for the original outbound freight cost
- The customer is responsible for return freight
- Applicable freight charges will be deducted from the refund
- White Glove Delivery charges are non-refundable
Exchange for Another Chair
- Price differences are adjusted according to the replacement chair
- Applicable freight charges are the customer's responsibility
- Higher- and lower-priced exchanges may have different freight treatment
- White Glove service for a replacement chair is charged separately
Returned chairs must be securely packaged for freight transport. The customer is responsible for damage caused by improper return packaging.
Refused or Undeliverable Shipments
Customers may be responsible for outbound freight, return freight, redelivery, storage, and any White Glove charges already incurred when delivery is refused without approval, an appointment is missed, or an incorrect or incomplete address is provided.
Questions About Delivery or Returns?
Contact TITTAC for White Glove pricing, Alaska or Hawaii freight quotes, delivery damage assistance, and exchange or return authorization.
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Hỗ trợ khách hàng rất nhiệt tình, bảo hành rõ ràng
Dù giá cao hơn một chút nhưng ghế Grand Duo thật sự là khoản đầu tư cho sức khỏe lâu dài. Chất liệu cao cấp, massage như tay người thật. Có thể trả góp không lãi 48 tháng nên không bị áp lực tài chính. Hỗ trợ khách hàng rất nhiệt tình, bảo hành rõ ràng. Ai đang phân vân thì đừng ngần ngại, rất xứng đáng!
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Osaki DuoMax.....great chair, great customer
Osaki DuoMax – Great Chair and Exceptional Customer Service!
We were looking for a massage chair after returning a previous purchase (from another company) that just didn’t quite fit our needs. After speaking with Toan from Tittac, we knew we were in good hands. He was extremely helpful, patiently listened to our needs, and helped us narrow down our choices until we selected the Osaki DuoMax.
We’ve had the chair for a while now, and it’s truly fantastic—we’re very happy with it! Plus, Toan personally followed up after delivery to ensure everything was perfect, which further confirmed our impression of Tittac’s exceptional customer service. Thank you so much, Toan and the entire Tittac team!
Highly recommend this business if you’re looking for quality massage chairs and reliable service.
We were looking for a massage chair after returning a previous purchase (from another company) that just didn’t quite fit our needs. After speaking with Toan from Tittac, we knew we were in good hands. He was extremely helpful, patiently listened to our needs, and helped us narrow down our choices until we selected the Osaki DuoMax.
We’ve had the chair for a while now, and it’s truly fantastic—we’re very happy with it! Plus, Toan personally followed up after delivery to ensure everything was perfect, which further confirmed our impression of Tittac’s exceptional customer service. Thank you so much, Toan and the entire Tittac team!
Highly recommend this business if you’re looking for quality massage chairs and reliable service.
