HBADA X7 vs SIHOO Doro C300 Pro V2: Which Should You Buy?

Key difference: The C300 Pro V2 lists about $1,000 lower, but the X7 has automatic lumbar support.

Figures for the HBADA X7 come from HBADA's official pages and those for the SIHOO Doro C300 Pro V2 from SIHOO's; prices are regular US list prices, and Chairpedia has not tested either chair.

Why compare them

Why put the HBADA X7 next to the SIHOO Doro C300 Pro V2? The HBADA X7 is HBADA's top chair with powered lumbar, while the SIHOO Doro C300 Pro V2 sits far lower on price, so this page shows what the gap pays for.

Specs side by side

Strengths and weaknesses

HBADA X7

Strengths

• Automatic lumbar support ("3-Zone Floating Wings with AI smart lumbar tracking: 1.97"/50mm electric front-back, 1.77"/45mm manual up-down, 10° auto-adapt"), where the C300 Pro V2's is set by hand.
• Longer warranty: 5 years on the base, gas lift and casters; 3 years on other parts, against 3 years on the C300 Pro V2.
• Deeper recline: up to 140° against 135° on the C300 Pro V2.
• 4D headrest, against 3D on the C300 Pro V2.
• More recline lock positions: 4 against 3 on the C300 Pro V2.

Weaknesses

• Costs more: from $1,509 against $499.99 for the C300 Pro V2.
• No manual lumbar setting is listed for the X7, unlike the C300 Pro V2.
• No footrest version is listed for the X7, unlike the C300 Pro V2.

SIHOO Doro C300 Pro V2

Strengths

• Lower list price: from $499.99 against $1,509 for the X7.
• Lumbar you set by hand ("Domino Sacral-Lumbar Support 2.0: moves up or down, 3 support levels"), where the X7's works on its own.
• A Footrest Version is sold; none is listed for the X7.

Weaknesses

• Lumbar is set by hand ("Domino Sacral-Lumbar Support 2.0: moves up or down, 3 support levels"), while the X7's moves on its own.
• Shorter warranty: 3 years, against 5 years on the base, gas lift and casters; 3 years on other parts on the X7.
• Shallower recline: up to 135° against 140° on the X7.
• 3D headrest, against 4D on the X7.
• Fewer recline lock positions: 3 against 4 on the X7.

How they differ

Price. At regular US list prices the HBADA X7 is $1,509 and the SIHOO Doro C300 Pro V2 is $499.99–$549.99. The C300 Pro V2 lists about $1,000 below the X7, before any store sale.

Lumbar support. The HBADA X7 lists “3-Zone Floating Wings with AI smart lumbar tracking: 1.97"/50mm electric front-back, 1.77"/45mm manual up-down, 10° auto-adapt”, the SIHOO Doro C300 Pro V2 “Domino Sacral-Lumbar Support 2.0: moves up or down, 3 support levels”. The X7's lumbar moves on its own as you shift, while the C300 Pro V2's is positioned by hand.

Warranty. The HBADA X7 lists “5 years on the base, gas lift and casters; 3 years on other parts”, the SIHOO Doro C300 Pro V2 “3 years”. The X7's cover runs longer.

Recline. The HBADA X7 lists “Up to 140°; positions at 105°, 116°, 128° and 140°”, the SIHOO Doro C300 Pro V2 “Up to 135°; positions at 105°, 120° and 135°”. The X7 leans back further.

Headrest. The HBADA X7 lists “4D Dual-Axis Headrest: 70° rotation, 1.77"/45mm height, 2.17"/55mm front-back”, the SIHOO Doro C300 Pro V2 “Ultra-wide 3D headrest, adjusts in three directions”. The X7's headrest has more adjustment than the C300 Pro V2's.

Footrest. SIHOO sells a Footrest Version of the C300 Pro V2; no such version is listed for the X7.

Seat size. Seat height: the HBADA X7 lists “17.52–20.87 in (44.5–53 cm)”, the SIHOO Doro C300 Pro V2 nothing. Seat width: the HBADA X7 lists “20.5 in (52 cm)”, the SIHOO Doro C300 Pro V2 “20.5 in (≈52 cm)”. Seat depth: the HBADA X7 lists “15.94–17.91 in (40.5–45.5 cm)”, the SIHOO Doro C300 Pro V2 “16.9–18.5 in (≈43–47 cm)”.

Other details. For the X7 and C300 Pro V2, the table above gives the armrests, maximum load and chair weight in each brand's own wording.

Who should buy which

• Pick the X7 over the C300 Pro V2 if you want lumbar support that adjusts itself as you move, with nothing to set.
• Pick the X7 over the C300 Pro V2 if you want a longer warranty (5 years on the base, gas lift and casters; 3 years on other parts).
• Pick the X7 over the C300 Pro V2 if you want a deeper recline (up to 140°).
• Pick the C300 Pro V2 over the X7 if you want the lower price — the C300 Pro V2 lists about $1,000 below the X7.
• Pick the C300 Pro V2 over the X7 if you want a lumbar position you set yourself and that stays put.
• Pick the C300 Pro V2 over the X7 if you want a built-in footrest (Footrest Version).

Not published by the brand (X7 vs C300 Pro V2): seat height for the SIHOO Doro C300 Pro V2.

Sources

• HBADA X7 (compared here with the C300 Pro V2): HBADA X7 Smart Ergonomic Office Chair with AI Lumbar Support – HBADA US official store, checked 2026-10-09; US list price from HBADA US Official Store, checked 2026-10-09.
• SIHOO Doro C300 Pro V2 (compared here with the X7): Sihoo Doro C300 Pro V2 Ergonomic Office Chair – Official US Sihoo Store, checked 2026-10-08; US list price from SIHOO US Official Store, checked 2026-10-08.
• Figures marked ≈ for the X7 and C300 Pro V2 are Chairpedia's unit conversions, not brand figures.