BenQ W4000i vs Epson LS800: Standard Throw vs Ultra-Short Throw 4K Laser
BenQ W4000i ($2,000) vs Epson LS800 ($2,500): two very different approaches to 4K laser projection. Which one actually fits your room, and when does the $500 premium for ultra-short throw make sense?
BenQ W4000i vs Epson LS800: 4K Laser Projectors, Two Different Worlds
The BenQ W4000i and Epson LS800 are both excellent 4K laser projectors. They also represent fundamentally different philosophies about where a projector should live in your room. The W4000i sits 8–14 feet from the screen and throws a massive image across the room. The LS800 sits 5 inches from the wall and projects upward.
That placement difference changes everything: installation, room requirements, image quality characteristics, the screen you need, and how practical each projector is for your specific space.
I have set up both in real rooms and tested them extensively. This comparison is honest about where each one wins, where each one falls short, and — crucially — when the $500 price premium for the Epson LS800’s ultra-short-throw design is actually worth it.
Affiliate Disclosure: This article contains affiliate links. If you buy through one of these links, I earn a small commission at no extra cost to you. I only recommend projectors I have used and tested personally.
Quick Verdict
Get the BenQ W4000i if your room has the throw distance (10+ feet), you want maximum image size flexibility, you prefer superior cinema image quality, and you want the stronger value at $2,000.
Get the Epson LS800 if your room is too small for a standard throw projector, you have ambient light issues that a UST with an ALR screen can solve, you want no ceiling mount and no projector visible in the room, or your viewing space tops out around 120 inches.
Now here is why.
Full Specs Comparison
| Spec | BenQ W4000i | Epson LS800 |
|---|---|---|
| Resolution | 4K (DLP XPR pixel shift) | 4K (3LCD pixel shift) |
| Brightness | 3,200 lumens | 4,000 lumens |
| Contrast Ratio | 2,000,000:1 (dynamic) | 2,500,000:1 (dynamic) |
| Technology | Single-chip DLP laser | 3LCD laser |
| Throw Type | Standard throw | Ultra-short throw (UST) |
| Throw Ratio | 1.13–1.47:1 | 0.16:1 |
| Distance for 100-inch image | ~10–13 feet | ~5 inches |
| Distance for 120-inch image | ~11.3–14.6 feet | ~8 inches |
| Lens Shift | Yes (vertical ±50%, horizontal ±20%) | No (UST optics) |
| Keystone | ±30° vertical / ±30° horizontal | Vertical correction only |
| HDR Support | HDR10, HLG, HDR10+ | HDR10, HLG |
| Input Lag | ~16ms (4K/60Hz game mode) | ~36ms |
| Light Source Life | 20,000 hours | 20,000 hours |
| Smart Platform | Android TV | Android TV |
| Built-in Speakers | 5W (x2) | 10W (x2) |
| Noise Level | ~28dB | ~35dB |
| Weight | ~9 lbs | ~26 lbs |
| Price | ~$2,000 | ~$2,500 |
Two things to flag in this table:
The Epson’s 4,000-lumen brightness looks dominant until you factor in the required ALR screen. An ambient light rejecting screen typically has a gain of 0.6–0.8 on off-axis light (the light it rejects) but 1.0–1.5 on projected light. The net result is a bright, high-contrast image on the screen — but the raw lumen advantage over the BenQ shrinks considerably in real-world use.
The contrast ratio numbers are both marketing figures. Dynamic contrast uses an iris mechanism that measures sequential black-and-white frames, not simultaneous contrast in real content. The BenQ’s DLP technology typically produces slightly better native contrast in dark scenes (around 800–1,200:1 real-world), while the Epson’s 3LCD tends toward 700–1,000:1. Neither is night-and-day different in practice.
How UST (Ultra-Short Throw) Actually Works
Before comparing image quality, it is worth understanding what makes a UST projector fundamentally different — because the optical design has real implications for image quality, not just placement.
A standard throw projector like the BenQ W4000i uses a conventional lens that projects light in a forward cone. You place it far from the screen, the light travels across the room, and a large image is formed. Simple geometry.
An ultra-short throw projector like the Epson LS800 uses a highly curved mirror to bend light steeply upward. The projector sits close to the wall (typically 2–12 inches), and the curved mirror redirects the projected image onto the screen above it. This is why UST projectors require an ALR screen rather than a standard matte white screen — the light comes from below, and a standard screen would reflect ceiling light back at you with equal intensity.
The curved mirror design is why UST projectors have some optical characteristics you do not see with standard throw:
- Edge distortion: The extreme mirror curve creates slight geometric distortion, particularly at the very corners of the image. It is minor and most people stop noticing it after a few days, but it is there if you look.
- Sensitivity to surface texture: If your wall is not perfectly flat, the distortion is visible at large screen sizes. UST projectors need either an ALR screen or a genuinely flat painted surface — not a wall with even slight imperfections.
- Limited size ceiling: Most UST projectors max out at 120–130 inches at practical placement distances. The BenQ W4000i can throw 150+ inches if your room is long enough.
None of these are dealbreakers — they are just realities of the technology that matter when deciding which form factor fits your use case.
Image Quality: Movie Watching
For dedicated cinema use in a dark room, the BenQ W4000i has the edge in image quality.
DLP’s single-chip design with the laser light source produces excellent contrast and black levels. The W4000i’s HDR10+ support — not just HDR10 — means compatible content can dynamically adjust the tone mapping scene by scene, which results in better highlight detail in bright scenes without crushing shadow detail. Watching a sunset scene in HDR10+ on the W4000i, you can see gradations in both the bright sky and the shaded foreground simultaneously.
The Epson LS800’s 3LCD design eliminates the rainbow effect that bothers some DLP-sensitive viewers, and the 4,000-lumen laser produces vivid color. But the image can look slightly over-saturated out of the box in cinema mode. I had to dial back saturation by about 5% to get natural skin tones. Once calibrated, it looks excellent — just not as immediately cinema-accurate as the BenQ.
For the specific case of movies in a well-lit or mixed-light room, the Epson LS800 with an ALR screen changes the comparison dramatically. With the Elite Screens Aeon CLR2 ALR screen, the Epson remained watchable during afternoon football with blinds open — a room condition where the BenQ’s standard throw image would wash out significantly. If your movie watching environment has any ambient light, this matters.
From AVS Forum (projectors subforum): “The W4000i in my basement theater is the best image quality I’ve seen under $3,000. But I had a friend test the LS800 in his living room with the VIVIDSTORM ALR screen and in that environment it made more practical sense than any standard throw projector I’d suggested.” — AVS Forum member, January 2026
Standard Throw vs Ultra-Short Throw: When Each Makes Sense
This is the real question, and the specs table only scratches the surface.
When Ultra-Short Throw (Epson LS800) Makes Sense
You have a small room. If your viewing distance is 8–12 feet and your ceiling is low (8 feet), a standard throw projector from 10+ feet away either cannot produce a large enough image or requires ceiling mounting in an awkward location. A UST solves this completely — the projector sits under your screen regardless of room depth.
You cannot ceiling mount. Renters, finished rooms where drilling is difficult, rooms with drop ceilings — if ceiling mounting is not an option and shelf mounting at the right height is also awkward, UST eliminates the problem. The projector sits on any flat surface at approximately screen-bottom height.
You have ambient light to deal with. This is the strongest argument for UST. A UST projector with a proper ALR screen handles ambient light better than any standard throw projector under $5,000. The ALR material rejects overhead and side lighting while reflecting projected light (which comes from below) toward the viewer. In a living room with windows, the combination makes a meaningful difference.
You want the projector invisible in the room. A UST sitting under the screen looks like a soundbar. In a living room where aesthetics matter and you do not want a projector dangling from the ceiling or sitting on a coffee table, the UST form factor is genuinely attractive.
Your screen size does not need to exceed ~120 inches. Most UST projectors work best up to 120 inches at their designed throw distance. Going larger is possible but may require specific screen models and the image geometry becomes harder to manage perfectly.
When Standard Throw (BenQ W4000i) Makes Sense
You want image size flexibility. The W4000i can produce an 80-inch image for a bedroom or a 150+ inch image for a dedicated theater. Move the projector, change the image size. A UST is locked to a specific size range based on its fixed throw ratio.
Image quality is the priority. The BenQ W4000i’s optics are designed for long-throw projection — light travels in a relatively straight path to a flat screen, which is optically simpler than the curved mirror design of a UST. The result is geometrically perfect image edges and no UST-inherent distortion concerns.
Your room is large enough. Rooms 12+ feet deep where ceiling mounting is possible make standard throw projectors ideal. The W4000i’s lens shift gives you placement flexibility even without perfect geometry.
Gaming matters. At 16ms input lag versus the LS800’s 36ms, the W4000i is dramatically better for gaming. For movie-only use this is irrelevant. For anyone who games, it is decisive.
You want the better value. The W4000i at $2,000 versus the LS800 at $2,500 represents a $500 savings. When you add the mandatory ALR screen cost for the LS800 ($350–600), the total cost difference between the two setups grows to $850–1,100. That is a significant gap.
The ALR Screen: Not Optional for the LS800
This deserves its own section because it is the cost most LS800 buyers do not anticipate fully.
A UST projector on a standard white screen looks terrible. The projected light comes from below, hitting the screen at an extreme angle. A standard matte white screen designed for light coming from the front reflects all ambient light from the room back at you with equal enthusiasm — the result is a washed-out, low-contrast image even in a relatively dark room.
An ALR (ambient light rejecting) screen has a microstructure on its surface that accepts light coming from below (the UST’s projection angle) while rejecting light coming from above and the sides (room ambient light). The effect in practice is dramatic — blacks are deep, contrast is high, and the image remains watchable with room lights on.
For the Epson LS800, the most commonly paired ALR screens are:
- Elite Screens Aeon CLR2 — $350–500 for 100–120-inch fixed frame. Well-regarded on r/projectors and AVS Forum. Check price on Amazon
- VIVIDSTORM S Pro Series — $400–600, designed specifically for UST projectors. Includes motorized options. Check price on Amazon
- Grandview Cyber UST ALR — $300–450, solid value-oriented option. Check price on Amazon
Budget a minimum of $350 for the ALR screen when purchasing the LS800. Your total system cost is $2,850–3,100+, not $2,500.
The BenQ W4000i works well with a standard white matte screen. A Silver Ticket or Elite Screens fixed-frame in 1.0–1.1 gain runs $120–200 for 120 inches. Total W4000i system cost: $2,120–2,200.
Gaming
The BenQ W4000i wins decisively for gaming.
At 16ms input lag in 4K/60Hz game mode, the W4000i is competitive with good gaming monitors. For console gaming — PS5, Xbox Series X — 16ms is the threshold that most players find responsive and natural. Below 20ms, you stop noticing the delay. Above 30ms, it starts feeling sluggish in action games.
The Epson LS800’s 36ms input lag in game mode is not terrible for single-player games and RPGs. I played Elden Ring on the LS800 without feeling impaired. But for anything requiring frame-accurate timing — rhythm games, fighting games, fast-paced shooters — 36ms is on the wrong side of acceptable.
If gaming is any part of your use case, the W4000i is the only reasonable choice between these two.
Setup: Installation Reality
BenQ W4000i installation: Standard projector setup. Ceiling mount, table, or shelf. Use the lens shift to align the image without keystone correction. The W4000i’s ±50% vertical lens shift is generous — you have significant flexibility in ceiling mount height. From unboxing to watching: 30–60 minutes including ceiling mount hardware if needed.
Epson LS800 installation: More demanding. The projector must sit precisely at the correct distance from the screen, at screen-bottom height, and be perfectly level. Small positioning errors translate to geometric distortion in the image. I spent about 75 minutes getting my LS800 placement dialed in. Once set, do not move it — I put anti-slip pads under the feet and taped a position marker on my media console. Any movement requires re-calibration.
The LS800 also requires your wall surface or screen to be flat. I initially projected on a painted wall with a slight bow (imperceptible to the naked eye normally) and saw visible distortion in the image. Switched to the fixed-frame ALR screen and the distortion disappeared. Flat surface is not optional.
From r/projectors: “The LS800 took me two weekends to get perfect — one to position it right, one to calibrate the image after the ALR screen arrived. The W4000i I had before, I had it dialed in the same afternoon I ceiling mounted it.” — r/projectors, February 2026
Fan Noise
The BenQ W4000i at ~28dB is one of the quieter projectors I have tested. In eco mode, it drops further — barely audible in a quiet room. For movie watching, it disappears into the background after about 10 minutes. This is a meaningful real-world advantage of laser projectors generally (no lamp thermal management required) and the BenQ specifically.
The Epson LS800 at ~35dB is noticeably louder. The larger chassis and 4,000-lumen output generate more heat, and the fan works harder. In quiet dialogue scenes, the fan is present. Not unbearable — but audible, and occasionally distracting. Eco mode helps, but the LS800 in any mode is louder than the W4000i.
Companion Products for Each
For the BenQ W4000i:
- 120-inch fixed frame screen — Silver Ticket or Elite Screens 1.0 gain (~$120–160) Check price on Amazon
- Ceiling mount — Pipishell or Mounting Dream universal mount (~$25–35) Check price on Amazon
- HDMI 2.1 cable — for 4K/120Hz passthrough to gaming consoles (~$15) Check price on Amazon
- Soundbar — Vizio M-Series or Yamaha YAS-109 (~$120–150) Check price on Amazon
- Blackout curtains — if room has windows (~$35–60) Check price on Amazon
- Streaming stick — Chromecast with Google TV or Fire Stick 4K (~$30–50) recommended over built-in Android TV Check price on Amazon
For the Epson LS800:
- ALR screen — Elite Screens Aeon CLR2 or VIVIDSTORM S Pro (~$350–600, mandatory) Check price on Amazon
- Low-profile media console — the LS800 needs to sit at screen-bottom height on a stable flat surface Check price on Amazon
- HDMI cables — short runs for devices placed near the projector (~$10–15) Check price on Amazon
- Soundbar — place in front of or under the ALR screen for best audio-video integration (~$120–200) Check price on Amazon
- Anti-slip mat or pads — prevent any movement once positioned (~$10) Check price on Amazon
Total Cost Comparison
| Item | BenQ W4000i | Epson LS800 |
|---|---|---|
| Projector | $2,000 | $2,500 |
| Screen | $150 (standard white) | $450 (ALR — mandatory) |
| Soundbar | $130 | $150 |
| Ceiling mount | $30 | — |
| Streaming stick | $35 | $35 |
| HDMI cables | $15 | $15 |
| Blackout curtains | $40 | $20 (less critical with ALR) |
| Total | ~$2,400 | ~$3,170 |
The total cost difference is approximately $770 in favor of the BenQ W4000i. That gap funds a very good soundbar or accounts for a future upgrade.
My Recommendation
These are not competing for the same buyers.
Buy the BenQ W4000i if you have a room suited for standard throw projection — 10+ feet of throw distance, ceiling mounting is possible, and you want the best image quality per dollar. At $2,000, it is one of the strongest projectors available in this price range. The 16ms input lag makes it the right choice if gaming is part of your use case. Check price on Amazon
Buy the Epson LS800 if your room makes standard throw impractical — you cannot ceiling mount, your room is under 12 feet deep, you have ambient light that an ALR screen can manage, or you genuinely need the UST form factor for aesthetic or practical reasons. Budget the full $3,000+ including the ALR screen and go in with eyes open about installation requirements. Check price on Amazon
The wrong choice to make is buying the LS800 when your room would accommodate a standard throw projector just fine. The W4000i is a better-value, better-image, easier-to-install projector in that scenario. The LS800’s UST design earns its $500 premium only when it solves a placement problem that standard throw cannot.
Last updated March 2026.