Atomstack A40 Pro V2
#5 in DiodeFull review
A cheap route to serious diode cutting power for a garage or shop with good ventilation. Not for a shared living space without an enclosure.
Amazon $719.99$719.99
The Atomstack A40 Pro V2 is the better laser engraver overall, rated 3.8 to 3.4. The Atomstack A40 Pro V2 leads on value. The xTool S1 40W wins on features. The Atomstack A40 Pro V2 costs $979.01 less ($719.99 vs $1,699).
xTool S1 40W
#11 in DiodeFull review
A powerful enclosed diode laser for hobby shops and small sellers who cut a lot of wood and want a big bed. Budget for the air assist pump.
Amazon $1,699$1,699
Prices were last checked November 2, 2026 and are subject to change; the price and availability shown by the retailer at the time of purchase apply.
Which should you buy?
- Choose the Atomstack A40 Pro V2 for value ($15 per optical watt ($719.99, 48 W) vs $42.48 per optical watt ($1,699, 40 W)).
- Choose the xTool S1 40W for features (enclosed, autofocus vs air assist).
Scores side by side
Each factor is scored 0-100 against the same fixed reference points for every diode laser engraver; a clear win is highlighted. How we rank explains each one.
| Factor weight | Atomstack A40 Pro V2 | xTool S1 40W |
|---|---|---|
| Overall rating | 3.8/5 | 3.4/5 |
| Value 35% | 100 $15 per optical watt ($719.99, 48 W) | 45 $42.48 per optical watt ($1,699, 40 W) |
| Work area 15% | 96 385 x 400 mm work area | 99 498 x 319 mm work area |
| Features 30% | 25 air assist | 50 enclosed, autofocus |
| Warranty 20% | 50 1-year warranty | 50 1-year warranty |
Specifications
| Atomstack A40 Pro V2 | xTool S1 40W | |
|---|---|---|
| Laser | ||
| Type | Diode | Diode |
| Optical power | 48 W | 40 W |
| Electrical input | - | 275 W |
| Work area | 385 x 400 mm | 498 x 319 mm |
| Maximum speed | 500 mm/s | 600 mm/s |
| Safety class | Class 4 | Class 1 |
| Features | ||
| Enclosed | No | Yes |
| Camera | No | No |
| Air assist | Yes | No |
| Autofocus | - | Yes |
| Weight | - | 44.1 lb |
| Warranty | 1 year | 1 year |
| Released | - | 2023-10-18 |