Dolphin S400
MSRP $1799
2 years manufacturer warranty
Dolphin S400 vs Dolphin EON 120d
A side-by-side comparison of the Dolphin S400 and Dolphin EON 120d — price, filtration, cleaning coverage, brushes and warranty — to help you pick the right Dolphin robotic pool cleaner.
Dolphin EON 120d
Price not published
3 years manufacturer warranty
| Feature | S400 | EON 120d |
|---|---|---|
| Overview | ||
| Price | MSRP $1799 | Not published |
| Lineup | S-Series™ | EON™ (cordless) |
| Best for | Specialty-retailer line | Cordless, cleans steps |
| Pool size | Up to 50 ft | Up to 50 ft |
| Cleaning coverage | Floor + Walls + Waterline | Floor + Walls + Waterline + Steps |
| Cleaning cycle | 2 hours | 2 hours |
| Suction | 4,000 GPH | Not published |
| Scrubbing brushes | 2 (active) | Not published |
| Filtration | Multi-layer filter basket | Self-cleaning backwash filter |
| Standout features | ||
| Waterline cleaning | Included | Included |
| 3-year warranty | No | Included |
| NanoFilters™ included | No | No |
| MultiMedia™ filtration | No | No |
| Media-Alert™ | No | No |
| Oversized leaf bag | No | No |
| MaxBin™ filtration | No | No |
| HyperBrush™ scrubbing | No | No |
| App control | Included | Included |
| Anti-tangle swivel | Included | No |
| Corded power | Included | No |
| Navigation & ownership | ||
| Navigation | Not published | SmartMap™ navigation |
| Weekly scheduling | Weekly timer | No weekly timer |
| App control | myDolphin™ Plus app | MaytronicsOne app |
| Cable | Anti-tangle swivel cable | None (cordless) |
| What is included |
|
|
| Warranty | 2 years | 3 years |
Dolphin S400 vs Dolphin EON 120d: how they compare
The Dolphin S400 is part of the S-Series™ lineup — a specialty-retailer model with myDolphin™ Plus app control and a caddy in the box. It cleans pools up to 50 ft with floor + walls + waterline coverage and Multi-layer filter basket filtration, backed by a 2-year warranty.
The Dolphin EON 120d is part of the EON™ (cordless) lineup — the pool-store cordless EON with MaytronicsOne app control and a 3-year warranty. It handles pools up to 50 ft with floor + walls + waterline + steps coverage and Self-cleaning backwash filter filtration, backed by a 3-year warranty.
Our verdict: the Dolphin S400 wins
Between these two, the Dolphin S400 is the stronger robot on paper — a specialty-retailer model with myDolphin™ Plus app control and a caddy in the box. It cleans with floor + walls + waterline coverage and Multi-layer filter basket filtration, backed by a 2-year warranty.
Our top recommendation: neither of these is in our two best lineups. For the best clean in this price range, step up to the Dolphin Quantum Pro from our ProLine™ — our top pick, highlighted at the top of this comparison.
Not sure yet? We're here to help
Every Dolphin Max-Series™ and ProLine™ robotic pool cleaner ships free and is backed by a full manufacturer warranty — explore our top-recommended robots and find the right fit for your pool.
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