Help me choose
Our pick: Dolphin Quantum
Dolphin Quantum is the Pool Express pick in this matchup. Dolphin Quantum uses the high-capacity XXL MaxBin for easier top-load debris handling. Dolphin Quantum is rated for pools up to 50 ft.
Liberty
Dolphin Liberty 400
Inground and above-ground pools up to 33 ft that need floor, wall and waterline cleaning without a cord.
ProLine
Dolphin Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
Why Dolphin Quantum is our pick
Dolphin Quantum
Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris.
$1,649
Buy Dolphin QuantumDolphin Liberty 400 or Dolphin Quantum: our take
Dolphin Liberty 400 and Dolphin Quantum are compared on pool fit, cleaning reach, debris handling, controls and ownership details. The recommendation is based on the job the robot must do—not a simple feature count.
Pool fit and cleaning reach
Dolphin Liberty 400 is intended for inground and above-ground pools, while Dolphin Quantum is intended for inground pools. Dolphin Liberty 400 is rated for pools up to 33 ft; Dolphin Quantum is rated up to 50 ft. Each cleans floor, walls, and waterline, so coverage alone does not separate them. Dolphin Quantum's documented cleaning system includes 2 active brushes, SmartNav 2.0 navigation, and Dual DC motors.
Filtration and debris
Dolphin Liberty 400 includes Basket and UltraFilter; Dolphin Quantum includes XXL MaxBin and NanoFilters. Both have documented fine-debris media, so basket capacity and ease of cleaning matter more than fine-particle capability.
Controls and day-to-day ownership
Dolphin Liberty 400 provides a weekly timer and smartphone control; Dolphin Quantum provides a weekly timer, smartphone control, and included remote control. Dolphin Liberty 400 uses cordless battery power, while Dolphin Quantum uses a 60 ft corded cable with an anti-tangle swivel. Dolphin Liberty 400 is listed at 17.9 lb versus 18.3 lb for Dolphin Quantum; that 0.40000000000000213 lb difference matters when lifting the robot from the pool.
Price, warranty and the decision
Dolphin Liberty 400 is listed at $1,429 and Dolphin Quantum at $1,649; Dolphin Liberty 400 is $220 less. Dolphin Liberty 400 lists a 3-year warranty compared with 2 years for Dolphin Quantum. Pool Express pick: Dolphin Quantum. Dolphin Quantum uses the high-capacity XXL MaxBin for easier top-load debris handling. Dolphin Quantum is rated for pools up to 50 ft. Choose Dolphin Liberty 400 when it is the better fit for shoppers prioritizing the lower $1,429 starting price.
Feature check: what each robot actually has
A green check means the feature is documented as included. A red X means it is documented as absent. A dash means the source does not make the feature clear.
| Feature | Dolphin Liberty 400 | Dolphin Quantum |
|---|---|---|
| Cleans the pool floor | Yes | Yes |
| Climbs and cleans walls | Yes | Yes |
| Scrubs the waterline | Yes | Yes |
| Fine-debris filter included | Yes | Yes |
| Large-debris filter | Yes | Yes |
| Automatic scheduling | Yes | Yes |
| Smartphone app | Yes | Yes |
| Anti-tangle swivel | Not listed | Yes |
| 3-year warranty | YesEdge | No |
| No recharging between cycles | No | YesEdge |
| Built-in UV-C water treatment | No | No |
Unknown is not treated as “no.” Specifications come from the product pages, current catalog records and manufacturer material collected for this site.
Where Dolphin Liberty 400 stands out
Dolphin Liberty 400 is the better fit for shoppers prioritizing the lower $1,429 starting price.
- Carries a 3-year warranty instead of 2 years
- Is listed $220 lower
- Weighs 17.9 lb versus 18.3 lb
Where Dolphin Quantum stands out
Dolphin Quantum is the better fit for pools up to 50 ft.
- Uses the high-capacity XXL MaxBin for easier top-load debris handling
- Is rated for pools up to 50 ft
- Runs from continuous plug-in power without a recharge between cycles
Dolphin Liberty 400 vs Dolphin Quantum specifications
Use pool fit first. Price and app control do not make up for a robot that cannot cover the length or surfaces you need cleaned.
| Specification | Dolphin Liberty 400 | Dolphin Quantum |
|---|---|---|
| Best fit | Inground and above-ground pools up to 33 ft that need floor, wall and waterline cleaning without a cord. | Inground pools up to 50 ft that need floor, wall and waterline cleaning, with fine debris. |
| Starting price | $1,429 | $1,649 |
| Pool type | Inground, Above-ground | Inground |
| Maximum pool length | Up to 33 ft | Up to 50 ft |
| Cleaning coverage | Floor, Walls, Waterline | Floor, Walls, Waterline |
| Power | Cordless | Corded |
| Filtration | Basket, UltraFilter | XXL MaxBin, NanoFilters |
| Scheduling | Weekly schedule + app | Weekly schedule + app |
| App and remote | App control | App + included remote |
| Cable | Cordless | 60 ft with anti-tangle swivel |
| Robot weight | 17.9 lb | 18.3 lb |
| Warranty | 3 years | 2 years |
Choose Dolphin Quantum
Dolphin Quantum is the Pool Express pick in this matchup. Dolphin Quantum uses the high-capacity XXL MaxBin for easier top-load debris handling. Dolphin Quantum is rated for pools up to 50 ft.
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