The Dyson Supersonic is the benchmark fast-drying dryer and the dryer most others are measured against. TechGearLab scored it 86 out of 100, the top mark in their test group, praising its powerful, well-controlled airflow and handle-mounted motor. It is not always the single fastest in raw minutes, but its combination of speed, low heat damage, balance, and quiet operation is unmatched. The price is the only real barrier.
Full review
Real-World Drying Speed
The Dyson Supersonic earned the top overall score in TechGearLab's ranked lab test, landing at 86 out of 100 and taking their Editors' Choice award. Testers noted that the dryer was 'quite fast, particularly at their higher settings,' with high-pressure airflow generated by the V9 digital motor rather than brute heat. In practice that means the Supersonic dries hair by moving a lot of air over it quickly, which is why so many users report cutting a 20-minute routine down to roughly 7 to 12 minutes on thick hair.
It is worth being precise about the speed claim, because the Supersonic is not always the single fastest dryer in raw minutes. In a direct Reviewed.com head-to-head, the tester wrote that she 'saw poofy but fully hair-drying results after 30 minutes of using the Dyson and a round brush,' while the cheaper Shark HyperAIR finished a similar job in about 20. The Supersonic's advantage is the quality and control of that airflow, not necessarily a stopwatch win against every rival.
Build Quality and Design
The defining design choice is the motor in the handle rather than the head. That single decision rebalances the entire tool, and reviewers across the board describe the Supersonic as light on the wrist and easy to maneuver through a long blowout. At about 1.8 pounds it is not the lightest dryer on paper, but the weight distribution makes it feel lighter in use than its spec suggests.
Dyson's magnetic attachment system is the other standout. The Flyaway attachment, styling concentrator, diffuser, smoothing nozzle, and gentle-air adapter all snap on and rotate even when hot, so you can reposition the airflow without burning your fingers. The fit and finish are premium throughout, and the dryer is a frequent winner in editorial 'best of' testing for exactly these reasons.
Heat Control and Hair Health
The Supersonic measures its outgoing air temperature 40 times per second and regulates the heating element accordingly, which is the mechanism Dyson uses to claim 'no extreme heat' damage. Reviewers consistently confirm the dryer never feels scorching even on its high setting, and that the negative-ion output leaves hair noticeably smoother with less static. For people who blow-dry daily, that lower-heat approach is a meaningful long-term benefit over cheap dryers that run hot.
This is also where the Supersonic separates itself from budget tools. A Conair-class dryer relies on hotter air to dry quickly; the Dyson relies on airflow volume and tight temperature regulation. The result is comparable speed with less thermal stress on the hair shaft.
Noise and Daily Use
Noise is an underrated win here. The motor was acoustically tuned to push part of its sound into frequencies the human ear is less sensitive to, and reviewers repeatedly describe the Supersonic as noticeably quieter than other high-velocity dryers. Combined with the balanced handle, it makes a daily blow-dry feel less fatiguing, and several owners specifically cite the lower pitch as the reason they reach for it over a louder budget dryer first thing in the morning.
Controls are simple physical buttons on the handle for heat and airflow, plus a dedicated cold-shot. There is no app, no Bluetooth, and no fuss, which most reviewers consider a plus on a tool you use wet-handed every morning. The magnetic attachments also make daily use frictionless: there is no twisting or locking mechanism to fumble with, you just bring the nozzle near the head and it snaps into place, and you can spin it to redirect airflow even while it is running hot.
Day to day, the practical upshot of all this engineering is that the Supersonic disappears into the routine. It is light enough not to tire your arm, quiet enough to use early without waking the house, and fast enough that the dry is over before frustration sets in. That low-friction experience, more than any single spec, is what keeps it at the top of editorial rankings year after year.
How It Compares to Alternatives
Against the Shark HyperAIR HD120, the Supersonic is the more refined tool but not always the faster one. In Reviewed.com's direct test the HyperAIR finished the same head in roughly 20 minutes to the Dyson's 30, and it costs about half as much, so a thick-haired shopper chasing pure speed-per-dollar has a legitimate reason to look at the Shark first. What the Dyson buys back is balance, quiet, heat control, and build quality, the things you feel every single day rather than on a stopwatch.
Against the Shark FlexStyle HD440, the comparison splits cleanly: the Supersonic is the better pure dryer, while the FlexStyle adds auto-wrap curling and a full styling kit the Dyson lacks. And against the budget Conair InfinitiPro 1875W, the gap is exactly what the prices suggest, the Conair dries fast for the money but is louder, less controlled, and far more basic. The Supersonic sits at the top because it wins on the qualities that do not show up in a single drying-time number.
Where It Falls Short
The obvious limitation is price. At roughly $430 it is one of the most expensive consumer hair dryers available, and several reviewers are blunt that it is hard to justify for hair that already dries fast. The New Knew's tester argued plainly that 'no one actually needs a $400 hair dryer,' and for fine or short hair that critique lands, you simply will not extract the value from the premium motor and heat control if your hair dries in five minutes regardless.
The proprietary ecosystem is the other catch. Attachments are Dyson-only and expensive to replace, and because the Supersonic is not always the literal fastest dryer, speed-obsessed shoppers with thick hair may get equal minutes from a cheaper high-velocity rival. You are paying for refinement, balance, and heat control as much as raw speed, which is a great deal for a daily-use device but a poor one if you only dry your hair occasionally.
Who It's Best For
The Supersonic is the right pick for someone who blow-dries frequently, has medium-to-thick hair, and wants the most refined daily experience: light in the hand, quiet, well-controlled heat, and fast enough to halve a typical routine. It is also the safe choice for people prioritizing long-term hair health over upfront cost.
It is the wrong pick for budget shoppers or anyone with thin, fast-drying hair, who will get most of the practical benefit from a $40 to $215 dryer. If built-in styling matters more than pure drying, the Shark FlexStyle HD440 is the more versatile buy, and the Shark HyperAIR HD120 delivers comparable drying speed for roughly half the money.
Strengths
- +Highest-ranked dryer in TechGearLab's lab testing (86/100), with airflow that cut drying time roughly in half versus a standard dryer
- +Digital V9 motor sits in the handle, so the tool is exceptionally well-balanced and light on the wrist during long blowouts
- +Intelligent heat control measures air temperature many times a second to keep the dryer from scorching hair
- +Markedly quieter than competing high-velocity dryers thanks to the acoustically tuned motor
- +Magnetic attachments (Flyaway, concentrator, diffuser, smoothing nozzle) snap on instantly and rotate while hot
Watch-outs
- −Among the most expensive consumer hair dryers on the market at around $430
- −In one head-to-head test it took 30 minutes to fully dry thick hair versus 20 for the Shark HyperAIR, so it is not always the literal fastest
- −Replacement and accessory costs are high, and the proprietary attachments do not fit other brands
- −Overkill for fine or fast-drying hair that does not need the premium motor
How it compares
Faster and quieter than the Conair InfinitiPro 1875W and substantially better controlled, but the Shark HyperAIR HD120 matched or beat its raw drying time in one direct test at half the price. Against the Shark FlexStyle HD440, the Supersonic wins as a pure dryer while the FlexStyle wins on built-in styling.
Who this is for
At a glance: Shoppers who want the fastest, most refined everyday blow-dry and will pay a premium for the lightest, quietest, best-balanced tool.
Why you’d buy the Dyson Supersonic
- Highest-ranked dryer in TechGearLab's lab testing (86/100), with airflow that cut drying time roughly in half versus a standard dryer.
- Digital V9 motor sits in the handle, so the tool is exceptionally well-balanced and light on the wrist during long blowouts.
- Intelligent heat control measures air temperature many times a second to keep the dryer from scorching hair.
Why you’d skip it
- Among the most expensive consumer hair dryers on the market at around $430.
- In one head-to-head test it took 30 minutes to fully dry thick hair versus 20 for the Shark HyperAIR, so it is not always the literal fastest.
- Replacement and accessory costs are high, and the proprietary attachments do not fit other brands.
Rating sources
“Both in temperature and speed...quite fast, particularly at their higher settings”
“I saw poofy but fully hair-drying results after 30 minutes of using the Dyson and a round brush.”
“It dries hair noticeably faster, feels lightweight, and is easy to use.”
Our 4.7 score is the average of these published ratings. Ratings marked * were derived from the reviewer’s written analysis or video transcript — the publisher didn’t print an explicit numeric score, so we inferred one from their own words. Click through to verify. More about methodology.
