Glamor shot of a LSX  850 Glamor shot of a LSX  850

Michael Phelps Legend SeriesLSX 850

The all-new LSX 850 combines the luxury of the Legend Series with an open seating arrangement. Featuring 59 jets and premium therapy seats, up to seven adults can enjoy the ultimate in relaxation and rejuvenation.

Dimensions 94" x 94" x 38" (239 cm x 239 cm x 97 cm)
Gallons 395 (1,495 L)
Jets 59  
Seating 7  
LSX  850 downshot

Michael Phelps Legend Series
LSX 850

Dimensions 94" x 94" x 38" (239 cm x 239 cm x 97 cm)
Weight (Dry/Full) 1,170 lbs (531 kg) / 5,760 lbs (2,613 kg)
Gallons 395 (1,495 L)
Power Requirement 240 V / 50 Amp
Seating Capacity 7
Stainless Steel Jets 59 (2 Master Blasters ®)
Pumps 3
Water Features 3
Filtration EcoPur® Charge
LED Lighting Orion Light System™
Exclusive Features StressRelief Neck and Shoulder Seat™
Master Force™ Bio-Magnetic Therapy System
Vac-Formed ABS Pan Bottom
Secondary Remote
Dream Lighting
Premium Options Mast3rPur™ Water Management System
QuietFlo Water Care System™
Fusion Air Sound System
Bluetooth Speaker
Listing Number 9923
Highlight video of a LSX  850

Highlight Video

The Michael Phelps LSX 850 combines the luxury of Master Spas' Legend Series hot tubs with an open seating arrangement. This spacious seven-person hot tub features 59 jets powered by three pumps for the ultimate in relaxation and rejuvenation.

StressRelief neck and shoulder seat feature video

StressRelief Neck & Shoulder Seat

Relieve unwanted tension and pain in your neck and shoulders. The unique out-of-water jets of the StressRelief Neck and Shoulder Seat targets this high-tension area.
Learn More

Xtreme Therapy Seat feature video

Xtreme Therapy Seat

The Xtreme Therapy™ Seat takes hot tub massage to the next level. The unique jet pattern and premium jets provide stress relief and relaxation for calves, arms, wrists and hands.
Learn More

Master Balster Foot Therapy feature video

Master Blaster Foot Therapy

Soothe tired, achy feet with the Master Blaster Foot Therapy. Jet clusters, each with 14 individual nozzles, offer a relaxing foot massage.
Learn More

ABS Pan bottom feature video

ABS Pan Bottom

The ABS Pan Bottom comes standard on all Michael Phelps Legend hot tubs. It offers a protective barrier between your spa and the foundation.

Bio-Magnetic therapy system feature video

Bio-Magnetic Therapy System

Relieve inflammation, improve circulation, and boost nervous system responses. The Master Force Bio-Magnetic Therapy System targets pressure points on the neck and back with strategically placed magnets.
Learn More

Orion Light System feature video

Orion Light System

With the touch of a button, the Orion Light System allows you to illuminate the topside controls, water features, under the water, and more.

EcoPur filtration feature video

EcoPur Filtration

The clean, clear water you want without the harsh chemicals you don't. EcoPur Charge uses minerals like copper and zinc to purify water and remove dirt, bacteria, and algae.
Learn More

Energy Efficient feature video

Energy Efficient

Quality construction and energy-efficient materials help keep energy costs low. The full-foam insulation and a snug-fitting cover work together to maintain water temperature.
Learn More

Ozone System feature video

Ozone System

The Ozone System releases a super fine mist that works with your sanitizer to kill bacteria and other organics. Your hot tub will require less maintenance and chemicals.
Learn More

Dream Lighting feature video

Dream Lighting

Beautiful soft streams of light accent the exterior corners of your hot tub. Not available with DreamStone Skirting.

Mast3rPur feature video

Mast3rPur

The Mast3rPur™ Water Management System reduces the amount of chemicals, like chlorine, that you need to use and keeps your spa water clean naturally.

Learn More

QuietFlow Water Care System feature video

QuietFlo Water Care System

Maximize efficiency, while keeping water filtered and heated evenly. The QuietFlo Water Care System utilizes a circulation pump to move water at preset intervals.
Learn More

Fusion Air Sound System feature video

Fusion Air Sound System

Stream your favorite station or playlist via Bluetooth®. The hot tub stereo includes up to four interior, water-resistant speakers, and a subwoofer to maximize sound quality.
Learn More

Bluetooth Speaker feature video

Bluetooth Speaker

Whether you are hanging out with loved ones or want to create a moment of calm, the right playlist can help you set the mood. This sound system has 40W power and a bass boost with up to 10 hours of playtime. It's designed to easily rest on the water features of the spa for superior sound quality.

  • 10 YEARS - Spa Structure
  • 7 YEARS - Shell Surface
  • 5 YEARS - Equipment
  • 5 YEARS - Plumbing
  • 5 YEARS - Jets
  • 5 YEARS - Skirting: Dreamstone™
  • Lifetime - Skirting: Duramaster Polymer™

See complete warranty for details.

Estimated Monthly Operation Cost

$19.97


Sterling Silver Acrylic Tuscan Sun Acrylic Midnight Acrylic Storm Cloud Acrylic
Espresso Skirting Graphite Grey Skirting Midnight Skirting Ash Stone Skirting Canyon Stone Skirting

Colors Available:

SHELL: Sterling Silver (Standard)

SKIRTING: DuraMaster Espresso* (Standard)

hot tub installation on a back patio hot tub installation on a back patio

See what our customers are saying

Variety of Options

"We love the tub with all the different jets and variety of positions. Also enjoy the different built in lights and variety of colors. We get in ours about 4-6 times a week!" - CDB, North Carolina


At Master Spas, we make buying a hot tub or swim spa just as relaxing as using one.

Come visit our showroom
Find Your Master Spas® Dealer
Explore our full range of premium spas with confidence as your local dealer answers any questions you may have.
Professional evaluates your space
Choose Your
Perfect Spa
Your Master Spas® dealer is there to help as you choose the model that is right for your lifestyle and space.
Schedule hot tub or swim spa installation
Live Better
Enjoy better daily living from the comfort of your own home with Master Spas®

Michael Phelps Legend Series LSX 850 Reviews