Which xTool S1 module should you actually buy?
When I first started looking into laser engravers for our company, I assumed the 20W module was the obvious choice. Cheaper, lighter, and still supposedly capable of etching logos on promotional items. Three months later, after a very public fail with a photo-engraved acrylic plaque for a client, I learned that output quality directly shapes how customers see your business. Here's what I wish someone had told me before I made that purchase.
This article compares the two most common xTool S1 configurations – the 20W diode module vs the 40W – across four dimensions that matter for a small-to-medium business: engraving detail, material range, speed, and total cost. By the end, you'll have a clear picture of which one fits your real-world needs.
Dimension 1: Engraving quality – photos and fine detail
The 20W module can handle text and basic shapes reasonably well. But when I tested it on a high-resolution photo engrave, the result was muddy – lost shadows and inconsistent depth. The 40W, with its higher power and finer control, produced crisp grayscale transitions that looked almost like a printed photo. For laser engrave photo projects, the difference is night and day.
Industry standard for photo realism in laser engraving is roughly 300–600 DPI equivalent. The 40W module achieves that more consistently, especially on materials like anodized aluminum and coated acrylic. (Note to self: I should have checked the sample gallery before ordering the 20W.)
Verdict: If your customers will ever ask for personalized photo gifts or detailed logos, the 40W pays for itself in first impressions.
What about plexiglass?
We do a lot of laser engrave plexiglass signs for office directories and lobby displays. The 20W can etch the surface, but the edges come out slightly frosted and uneven. The 40W cuts cleanly, leaving a polished edge that looks premium. One client actually commented on the difference – that's the kind of feedback that makes or breaks a vendor relationship.
Dimension 2: Material capabilities and bed size
The xtool s1 bed size is 400×400 mm regardless of module – that's generous for most small projects. But what you can do inside that bed varies. The 20W handles wood, leather, dark acrylic, and coated metals (like laser marking foil). The 40W adds clear acrylic cutting (up to 8 mm), thicker hardwoods, and direct engraving on bare aluminum and stainless steel.
For an admin buyer like me, that means the 40W lets us produce more in-house without outsourcing. Outsourcing a single custom engraved aluminum sign can cost $80–150 (based on online quotes, January 2025). Having the 40W module meant we could do those jobs for the cost of materials only – roughly $15–20 each.
Verdict: If your product range includes metal or thick acrylic, the 40W expands your capabilities significantly.
Dimension 3: Speed and throughput
The 40W module doesn't just cut deeper – it cuts faster. For example, engraving a 4×6 inch photo on leather: the 20W takes about 12 minutes at 70% power; the 40W does it in 7 minutes at 50% power. Over a batch of 50 plaques, that's over 4 hours saved per run. Speed matters when you're trying to meet client deadlines. (I learned this the hard way when a rush order arrived late. Ugh.)
Faster cuts also mean less thermal buildup, which reduces burn marks on wood edges – another quality win for the 40W.
Verdict: For any volume work, the 40W's speed improvement is worth the premium.
Dimension 4: Cost and hidden needs (exhaust, accessories)
The 40W module costs about $300–400 more than the 20W (prices vary, check current). But the real cost trap is underestimating peripherals. You need proper xtool s1 exhaust for both modules – the machine comes with a fan, but I strongly recommend an external exhaust system if you're cutting acrylic or leather indoors. The 40W produces more smoke, so a better ventilation setup is non‑negotiable.
Also, consider the easy laser cutter projects you'll actually do. If you're only making keychains and coasters, the 20W is fine. But if you plan to create customer-facing gifts or sell engraved products, the 40W's higher quality directly boosts your brand image. My biggest regret? Thinking I could save money and still impress clients. You can't.
My recommendation: choose based on your customer
Here's the bottom line:
- Choose the 20W module if: Your use is purely internal (e.g., labeling parts, prototyping), you never need photo engraving or thick acrylic, and budget is your #1 constraint. It's a capable machine for basic projects.
- Choose the 40W module if: You produce items that clients see, touch, or receive as gifts. If quality equals your brand's image, the 40W is the safer bet. It handles photos, plexiglass, metals, and runs faster – all of which translate into better customer perception and fewer do-overs.
When I finally upgraded from 20W to 40W, the first client photo plaque came out flawless. The client said, 'This looks professionally made.' That's exactly the feedback you want your admin purchases to generate. Don't undersell your brand on a module decision.
“Industry standard color tolerance is Delta E < 2 for brand-critical colors.” – Pantone Color Matching System. The same principle applies to laser engraving: tight tolerances build trust.
