Bullfrog A8 vs X8 hot tubs compared
Short answer
The Bullfrog A8 seats 8 with no lounger in 94 x 94 in; the X8 seats 8 with no lounger in 94 x 94 in. The A8 is $12,095–$26,395 (maker's A Series starting prices, Oct 2026); the X8 $8,895–$15,195 (maker's X Series starting prices, Oct 2026).
| Measure |  Bullfrog A8A Series |  X8X Series |
|---|---|---|
| Lineup | ||
| Series | A Series | X Series |
| Priceas labeled under each figure | $12,095–$26,395A Series starting prices (MSRP), Oct 2026 | $8,895–$15,195X Series starting prices (MSRP), Oct 2026 |
| Size | ||
| Seats | 8 | 8 |
| Length | 94" | 94" |
| Width | 94" | 94" |
| Height | 38" | 38" |
| Water | 644 gal | 486 gal |
| Dry weight | 808 lb | 758 lb |
| Filled weightwater, no people | 6,327 lb | 5,860 lb |
| Jets and pumps | ||
| Jetsas the maker counts them | Not published | 50 |
| Jet pumps | 2 | 2 |
| Pump horsepoweras published | 2.5 HP | 2.5 HP (240V) per jet pump |
| Neck and shoulder jets | available via NeckEase NX / NeckPlus NX JetPaks | Advanced Neck and Shoulder Therapy |
| Electrical | ||
| Voltage | 240V | 240V |
| Amperage | 30/50A | 240V~30/50A |
| Breaker | dedicated circuit breaker required; 50A standard, convertible… | 50A (30A conversion option available) |
| Heaterat 240V | 4 kW | 4 kW |
| Build and water care | ||
| Insulation | 100% closed-cell full foam | High-density full-foam (100% closed-cell) |
| Shell | acrylic | Acrylic |
| Cabinet | EternaWood™ | Wood-free composite cabinet panels (cabinet corners, door and… |
| Ozone | WellSpring™ Ozone Purifier System (optional) | Not published |
| Built in | USA | United States |
| Warranty | ||
| Shell structure | 10 years | 5 years |
| Shell surface | 7 years | 3 years |
| Equipment | 5 years | 3 years |
| Plumbing | 5 years | 3 years |
| Cabinet | 5 years | 3 years |
Verdict: The Bullfrog A8 suits buyers who want a longer shell warranty (10 years against 5 years). The X8 suits buyers who want a lighter load on a deck (5,860 lb filled) and less water to heat and treat (486 gal).
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What is the difference between the Bullfrog A8 and X8?
Both seat 8. They share one shell size, 94 x 94 x 38 in. Prices: the A8 $12,095–$26,395 (maker's A Series starting prices, Oct 2026), the X8 $8,895–$15,195 (maker's X Series starting prices, Oct 2026).
Both are Bullfrog Spas hot tubs, the A8 from the A Series and the X8 from the X Series. Every figure is the maker's own, with a dot that links the page or PDF it came from. Where the published specs differ:
- Water. A8: 644 gal; X8: 486 gal
- Dry weight. A8: 808 lb; X8: 758 lb
- Filled weight. A8: 6,327 lb; X8: 5,860 lb
- Neck and shoulder jets. A8: available via NeckEase NX / NeckPlus NX JetPaks; X8: Advanced Neck and Shoulder Therapy
- Amperage. A8: 30/50A; X8: 240V~30/50A
- Insulation. A8: 100% closed-cell full foam; X8: High-density full-foam (100% closed-cell)
- Cabinet. A8: EternaWood™; X8: Wood-free composite cabinet panels (cabinet corners, door and…
- Built in. A8: USA; X8: United States
Will the A8 or the X8 fit my space and deck?
The A8 is 94 x 94 in, about 61 sq ft and 38 in tall; filled, it weighs 6,327 lb, about 103 lb per sq ft before anyone gets in. The X8 is 94 x 94 in, about 61 sq ft and 38 in tall; filled, it weighs 5,860 lb, about 96 lb per sq ft before anyone gets in. Leave room around the tub for the cover lifter and the service panel, and have a builder check any deck for the filled weight plus people. See hot tub sizes, hot tub weight and what to put a hot tub on.
What electrical hookup do the A8 and X8 need?
The A8 runs on 240V. The X8 runs on 240V. The table lists amperage and breaker as each maker prints them. A licensed electrician sizes the circuit and the GFCI protection for the model you buy. See hot tub electrical requirements.
Do the A8 and X8 carry the same warranty?
Bullfrog A8: 10 years on the shell structure, 7 years on the shell surface, 5 years on the equipment, 5 years on the plumbing and 5 years on the cabinet.
Bullfrog X8: 5 years on the shell structure, 3 years on the shell surface, 3 years on the equipment, 3 years on the plumbing and 3 years on the cabinet.
Read the warranty card before you sign: labor after year one, travel charges, and whether coverage moves to a second owner. The hot tub warranty comparison lines up every brand.
What do the A8 and X8 sell for?
Bullfrog Spas posts only a series range for the A8: $12,095–$26,395 (maker's A Series starting prices, Oct 2026). Bullfrog Spas posts only a series range for the X8: $8,895–$15,195 (maker's X Series starting prices, Oct 2026). Delivery, the pad, the electrician and the cover lifter are extra. Each model's price and where it comes from: Bullfrog A8 price and Bullfrog X8 price.
Which costs less to run, the A8 or the X8?
The A8, by 53 W on standby, about $7.04 a month. Standby is what a tub draws to hold its temperature with the cover on and nobody in it. California tests it the same way for every spa sold in the state, so it is the fairest running-cost figure we have.
The A8 draws 208 W in California's standby test (filed at 501 gallons), about 152 kWh and $27.62 a month at the U.S. average rate. 78% of the 64 filed tubs its size draw more; their median is 227.5 W.
The X8 draws 261 W in California's standby test (filed at 454 gallons), about 191 kWh and $34.66 a month at the U.S. average rate. 8% of the 89 filed tubs its size draw more; their median is 223 W.
Costs use the U.S. average residential rate of 18.19¢ a kWh (January to July 2026, EIA). Your own rate, climate and how often you use the jets change the bill. Hot tub running cost works it out by state, and measured standby watts lists every filed model.
What to check in the showroom
- Sit in both, dry is fine, in the seat you would use most. On a running display tub, feel the jets with the back of your hand. Seat depth and where the jets land matter more than the count.
- Climb in and out: step height and the lounger's length suit some bodies and not others.
- Ask for each model's California Energy Commission listing and the warranty card.
The full spec sheets: Bullfrog A8 hot tub and Bullfrog X8 hot tub. The series: Bullfrog A Series.
Other model comparisons: Bullfrog A7 vs A8 and Bullfrog X7 vs X8.
Still deciding? Get the price range on both.
- Bullfrog A8$12,095–$26,395A Series starting prices (MSRP)
- Bullfrog X8$8,895–$15,195X Series starting prices (MSRP)
Free price range, then one dealer.
Common questions
What is the difference between the Bullfrog A8 and X8?
Both seat 8. They share one shell size, 94 x 94 x 38 in. Prices: the A8 $12,095–$26,395 (maker's A Series starting prices, Oct 2026), the X8 $8,895–$15,195 (maker's X Series starting prices, Oct 2026). The table lists every published figure side by side.
Which is bigger, the A8 or the X8?
They take the same floor space: 94 x 94 in, about 61 sq ft each. The A8 holds 644 gallons and the X8 486.
Which costs less to run, the A8 or the X8?
The A8: 208 W on standby against 261 W in California's tests, about $27.62 against $34.66 a month at the U.S. average of 18.19¢ a kWh (EIA, January to July 2026). Heating fresh water and running the jets add to that.
Do the A8 and X8 have the same warranty?
No. Shell structure: 10 years on the A8, 5 years on the X8. Shell surface: 7 years on the A8, 3 years on the X8. Equipment: 5 years on the A8, 3 years on the X8. Plumbing: 5 years on the A8, 3 years on the X8. Cabinet: 5 years on the A8, 3 years on the X8. Read the warranty card for labor and transfer terms.
How much do the A8 and X8 cost?
Bullfrog Spas posts only a series range for the A8: $12,095–$26,395 (maker's A Series starting prices, Oct 2026). Bullfrog Spas posts only a series range for the X8: $8,895–$15,195 (maker's X Series starting prices, Oct 2026). Delivery, the pad and the electrician are extra.
Sources
8
- Bullfrog Spas A8 product pagemaker's specifications
- Bullfrog Spas A8 specification sourcesize, jets and electrical
- Bullfrog Spas A8 specification sourcesize, jets and electrical
- Bullfrog Spas warrantyA8 warranty terms
- Bullfrog Spas X8 product pagemaker's specifications
- Bullfrog Spas X8 specification sourcesize, jets and electrical
- California Energy Commission appliance database (spas)standby watts
- EIA Electric Power Monthly, Table 5.6.BU.S. average residential rate, 18.19¢ a kWh, January to July 2026