BenQ TH685 1080p Gaming Projector

BenQ TH685 1080p Gaming Projector — image 1
BenQ TH685 1080p Gaming Projector — image 2
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77%
23%
91%
Gaming Performance
83%
Image Brightness
86%
Color Accuracy
92%
Input Lag
88%
Setup & Installation
54%
Built-in Audio
57%
Fan Noise
79%
Build Quality
76%
Value for Money
63%
Lamp & Longevity
67%
HDR Performance
71%
Connectivity
89%
Warranty & Support
81%
Streaming Versatility
More

Overview

The BenQ TH685 1080p Gaming Projector sits in a competitive spot between entry-level projection and high-end home theater gear, targeting console and PC gamers who want big-screen immersion without paying TV-sized prices. Its native 1080p resolution handles everyday gaming and streaming well, and it accepts 4K HDR10 input — though it is worth being clear that the 4K signal is downscaled, not displayed natively. At 3500 ANSI lumens, it holds up reasonably in moderately lit spaces, though a fully darkened room is where the image really comes into its own. BenQ has long been a credible name in projection, and the 3-year warranty backing this model is genuinely rare in this category.

Features & Benefits

What makes this gaming projector genuinely interesting for competitive players is the 8.3ms input lag at 1080p and 120Hz — a figure low enough that most people will not notice any delay during fast-paced action or sports titles. Game Mode tightens image contrast for better visibility in dark scenes, while Game Sound Mode shapes audio to complement on-screen action rather than just boosting volume. LumiExpert handles ambient brightness adjustments automatically, a small but welcome detail during long sessions. PS5 owners can run games at 1080p/120Hz or 4K/60Hz without adapters. The short throw distance — roughly 8 feet for a 100-inch image — makes room placement significantly easier than most comparable projectors demand.

Best For

BenQ's gaming-focused projector is a strong fit for console players who want a large, cinematic image without the footprint of an equivalent-sized television. It performs best in dedicated spaces with controlled ambient lighting: a basement, a blacked-out living room, or a proper media room. Households that split time between gaming and movie watching will appreciate the versatility, since the image holds up well for both use cases without needing major adjustments. Streaming dongle users — Fire TV, Apple TV, Chromecast — can plug directly into the HDMI port and run everything cleanly. Anyone who values long-term brand support will also find this a more reassuring purchase than most rivals in the category.

User Feedback

Owners consistently praise the TH685 for its color accuracy and brightness in dark or semi-dark rooms, with many noting how well the image holds up for both gaming and film content compared to similarly priced alternatives. Setup draws frequent compliments — the short throw geometry genuinely simplifies placement for most living spaces. The criticisms that surface most reliably involve fan noise, which a noticeable portion of buyers describe as distracting during quieter game moments or slow-paced films. The built-in speaker earns mixed marks: adequate for casual use, but most long-term owners end up pairing the unit with a soundbar or external speakers. Some buyers also raise concerns about lamp longevity and heat output over extended daily use.

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Pros

  • Input lag of 8.3ms at 1080p/120Hz is competitive enough for fast-paced and multiplayer gaming.
  • The short throw ratio makes it easy to fit a 100-inch image into a typical living room or basement.
  • Fully compatible with PS5 at both 1080p/120Hz and 4K/60Hz without additional adapters.
  • 3500 lumens delivers a bright, vivid image in rooms with reasonable light control.
  • Game Mode and Game Sound Mode work together to sharpen visuals and tailor audio without manual tuning.
  • LumiExpert automatically adjusts brightness to reduce eye strain during long play sessions.
  • Covers 95% of the Rec. 709 color space, producing accurate and natural-looking colors for both games and films.
  • The three-year manufacturer warranty is a standout commitment compared to most competitors.
  • Works cleanly with streaming dongles like Fire TV or Apple TV plugged directly into the HDMI port.
  • At under 10 pounds, the TH685 is light enough to reposition or store without much effort.

Cons

  • Native output is 1080p only — 4K content is downscaled, not displayed at true 4K resolution.
  • Fan noise is consistently flagged by owners and can be distracting during quiet or slow-paced content.
  • The built-in 5W speaker is underwhelming for serious gaming or film audio; an external setup is almost essential.
  • Image quality drops noticeably in rooms with uncontrolled ambient light, limiting placement flexibility.
  • Lamp-based light source means long-term brightness will degrade and eventual bulb replacement adds ongoing cost.
  • No wireless connectivity built in — streaming requires a physical dongle or a separate media player.
  • Heat output during extended sessions has been flagged by some owners as a consideration in smaller enclosed spaces.
  • The HDR effect, while present, is constrained by the lamp brightness ceiling and does not match OLED or high-end LCD performance.

Ratings

The scores below reflect an AI-driven analysis of verified global buyer reviews for the BenQ TH685 1080p Gaming Projector, with spam, bot-generated, and incentivized feedback actively filtered out before scoring. Each category captures both the genuine strengths buyers praise and the friction points they report after extended real-world use. Nothing is glossed over — where the TH685 earns high marks, the data supports it; where it falls short, that is reflected too.

Gaming Performance
91%
The low input lag at 1080p and 120Hz is the TH685's most celebrated trait among competitive players, with many console gamers noting that fast-paced titles feel genuinely responsive rather than sluggish. PS5 owners in particular highlight the 120Hz support as a real-world advantage during multiplayer sessions.
A small but vocal group of buyers note that unlocking the full 120Hz performance requires careful HDMI cable and console settings configuration, and that the benefits are less obvious in slower, narrative-driven games where frame rate is less critical.
Image Brightness
83%
In properly darkened or semi-controlled rooms, buyers consistently describe the image as punchy and vivid, with enough output to fill a 100-inch screen without looking dim or washed out during evening gaming sessions or weekend movie nights.
Performance drops noticeably in rooms with open windows or strong overhead lighting — a recurring complaint from buyers who placed the projector in multipurpose living spaces. It is strong for a lamp-based unit, but it is not daylight-capable by any stretch.
Color Accuracy
86%
Covering 95% of the Rec. 709 color space means skin tones, environments, and game art render with a naturalness that buyers frequently single out as better than expected at this tier. Film content in particular earns praise for feeling balanced rather than oversaturated.
Some users coming from OLED displays or high-end LCD monitors find the color depth less impressive by comparison, and a few note that the HDR effect, while present, adds only modest improvements to highlights rather than the dramatic contrast shift seen on panel-based displays.
Input Lag
92%
For a projector, 8.3ms is a genuinely competitive figure, and buyers transitioning from gaming TVs often report being pleasantly surprised by how tight the response feels during reaction-heavy titles. Sports games, fighting games, and shooters all benefit from this.
The low lag figure applies specifically to the 1080p/120Hz combination with Game Mode active — outside of these conditions, some users report the input feel changes, and a handful note that finding the optimal settings required trial and error before it clicked.
Setup & Installation
88%
The short throw ratio consistently earns positive remarks for making placement straightforward — most buyers report having the projector running and filling a wall within 30 minutes of unboxing. The compact distance needed for a large image removes the ceiling-mount complexity many projectors impose.
Keystone correction and focus adjustment take a bit of patience to dial in precisely, and a small number of buyers report difficulty achieving a perfectly rectangular image without a flat, even surface to project onto.
Built-in Audio
54%
46%
The treVolo speaker with its built-in equalizer is adequate for quick casual use — setting up a streaming dongle and watching something without any external gear connected works in a pinch, and the Game Sound Mode does add a noticeable audio shape improvement over the flat default.
The overwhelming consensus among regular users is that the built-in speaker simply cannot fill the sonic space created by a 100-inch image. Dialogue clarity and bass response both disappoint at higher volumes, and most buyers recommend budgeting for a soundbar or external speakers from the start.
Fan Noise
57%
43%
The cooling fan keeps operating temperatures in check even during multi-hour gaming sessions, which is a genuine engineering necessity for a 3500-lumen lamp-based unit, and some buyers who game with headsets report barely noticing it in practice.
Without headphones, the fan is the TH685's most divisive characteristic — buyers watching quiet drama films or playing atmospheric single-player games describe the hum as persistently noticeable. In smaller rooms, it is difficult to tune out during low-action scenes.
Build Quality
79%
21%
The chassis feels solid and well-assembled for its weight class, and buyers who have moved or repositioned the unit multiple times report no structural concerns. At just over 9 pounds, it strikes a reasonable balance between sturdiness and portability.
Some buyers describe the exterior plastic as feeling slightly budget-grade relative to the overall price of the unit, and the port placement on the rear panel is occasionally flagged as inconvenient when the projector is placed close to a wall.
Value for Money
76%
24%
Buyers who prioritize gaming performance and large-screen immersion generally feel the price is justified, particularly when comparing it against the cost of purchasing a television of equivalent screen size. The three-year warranty is repeatedly cited as adding tangible long-term value.
Buyers expecting native 4K or television-level contrast and black depth for the price often feel let down, and the need to invest in external audio on top of the purchase price makes the total real-world cost higher than the sticker figure suggests.
Lamp & Longevity
63%
37%
Buyers who manage brightness settings carefully and use lower output modes for casual viewing report the lamp holding up well over the first year or two of regular use, with no sudden brightness cliff noticed in that window.
Long-term owners raise legitimate concerns about brightness degradation over time, and the cost of replacement lamps adds an unavoidable ongoing expense that LED or laser projectors avoid entirely. A few buyers also flag heat output as a consideration in enclosed media cabinet setups.
HDR Performance
67%
33%
When fed a 4K HDR10 signal from a compatible console or media player, the TH685 does produce a visible improvement in highlight rendering and shadow separation compared to standard dynamic range content, giving HDR game cutscenes and films a more dynamic look.
The HDR effect is constrained by the lamp's physical brightness ceiling, so the peak highlights that HDR is meant to showcase never reach the intensity of a proper HDR display. Buyers with prior HDR TV experience consistently describe the projector's HDR as soft rather than impactful.
Connectivity
71%
29%
HDMI compatibility with all major consoles and streaming dongles keeps things simple, and buyers appreciate that the TH685 works out of the box with Fire TV sticks, Apple TV, and Chromecast without any additional configuration.
The absence of built-in Wi-Fi or Bluetooth forces buyers who want wireless audio or streaming to rely on external adapters and dongles, which adds clutter some users were not expecting given the projector's price positioning.
Warranty & Support
89%
The three-year manufacturer warranty with US-based support is one of the most frequently praised non-spec attributes of the TH685, with buyers describing the coverage as a meaningful confidence boost over rival brands that ship comparable projectors with a single year of protection.
A small number of buyers report that lamp coverage under the warranty is more limited than the headline warranty length implies, and some describe wait times for support responses as longer than expected during peak periods.
Streaming Versatility
81%
19%
Households that use the TH685 for both gaming and evening streaming report it adapts well to both roles without needing to switch profiles manually — Game Mode handles gaming, and the standard image mode suits film and TV content comfortably for mixed-use families.
Without a native smart platform or built-in app ecosystem, buyers who do not own a dedicated streaming device need to purchase one separately, which adds a step that feels unnecessary at this price point compared to smart projectors entering the market.

Suitable for:

The BenQ TH685 1080p Gaming Projector is purpose-built for console and PC gamers who want a genuinely large image without the wall-dominating footprint of an equivalent television. It rewards buyers who have a dedicated space — a basement, blacked-out living room, or home theater room — where ambient light can be managed, because that is where its brightness and color accuracy land most effectively. PS5 and Xbox owners in particular will appreciate the ability to run games at 1080p and 120Hz with low input lag, a combination that remains uncommon at this projector price tier. Households that mix gaming sessions with regular movie or streaming nights will find the image versatile enough to serve both well without constant fiddling. Anyone who puts weight on long-term brand reliability will also find the three-year warranty a meaningful advantage over most rivals shipping with half that coverage.

Not suitable for:

The BenQ TH685 1080p Gaming Projector is not the right choice for buyers expecting a true 4K output — it accepts 4K HDR signals but renders them at native 1080p, so anyone prioritizing pixel-level sharpness on a large screen should look at dedicated 4K projectors instead. It is also a poor fit for bright living rooms or sunlit spaces, since even 3500 lumens cannot fully overcome direct ambient light, and the image will look washed out without proper light control. Buyers sensitive to fan noise should proceed carefully, as multiple owners flag the cooling system as audibly noticeable during quieter content. Those expecting the built-in speaker to handle serious audio duties will likely be disappointed and should budget for an external sound setup from the start. Finally, users with very limited room depth may want to double-check throw distance requirements, as this projector is not a true ultra-short-throw unit.

Specifications

  • Native Resolution: The projector outputs a native 1920x1080 (1080p) image, with support for 4K HDR10 input signals that are downscaled for display.
  • Brightness: Rated at 3500 ANSI lumens, delivering a visible and vibrant image in rooms with moderate ambient light control.
  • Input Lag: Achieves 8.3ms input lag when running at 1080p and 120Hz, making it responsive enough for competitive and fast-action gaming.
  • Refresh Rate: Supports up to 120Hz at 1080p resolution, enabling smoother motion during fast-paced games and high-frame-rate content.
  • Color Coverage: Covers 95% of the Rec. 709 color space, producing accurate and consistent color reproduction for both gaming and film content.
  • Throw Distance: Projects a 100-inch image from approximately 8.2 feet (2.5 meters), making it practical for standard living rooms and basements.
  • HDR Support: Compatible with HDR10 input via 4K HDMI sources, enhancing contrast between highlights and shadows on supported content.
  • Speaker: Includes an integrated 5W treVolo speaker with a built-in equalizer for basic audio output without an external sound system.
  • Connectivity: Connects to consoles, media players, and streaming dongles via HDMI; no built-in wireless connectivity is included.
  • Console Support: Fully compatible with PS5 at 1080p/120Hz and 4K/60Hz, and supports Xbox consoles at equivalent resolutions over HDMI.
  • Auto Brightness: LumiExpert technology automatically adjusts image brightness in response to ambient lighting conditions to reduce eye strain.
  • Game Modes: Includes dedicated Game Mode for image optimization and Game Sound Mode for audio tuning suited to gaming content.
  • Weight: The unit weighs 9.24 pounds, making it manageable for repositioning but not designed as a compact portable projector.
  • Warranty: Backed by a 3-year manufacturer warranty with US-based customer support, which is significantly longer than the industry standard of one year.
  • Light Source: Uses a traditional lamp-based light source, which will gradually lose brightness over time and will eventually require bulb replacement.
  • Availability: First made available in February 2020, with the model continuing to be sold and supported through BenQ's active product lineup.

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FAQ

It is important to be clear on this: the BenQ TH685 1080p Gaming Projector accepts 4K HDR10 input signals, but its native display resolution is 1080p. That means a 4K source will be downscaled before being shown on screen. You get the HDR contrast benefits from a 4K signal, but not the additional pixel detail of a true 4K projector.

Yes, the TH685 supports PS5 at 1080p and 120Hz, which is the combination most PlayStation 5 games use when targeting high frame rates. You can also run PS5 at 4K/60Hz if you prefer higher resolution over frame rate, though keep in mind the image will still be displayed at native 1080p.

At 3500 lumens, this gaming projector handles moderately lit rooms reasonably well, but it performs best when ambient light is controlled. Direct sunlight or bright overhead lighting will wash out the image noticeably. A basement, blacked-out living room, or evening viewing environment will give you the best results.

The 5W treVolo speaker is adequate for casual use or occasional viewing, but most buyers who use this projector regularly end up adding an external speaker or soundbar. For gaming and movie audio at a screen size of 100 inches, a dedicated audio setup makes a significant difference in the overall experience.

Fan noise is one of the more consistent complaints from long-term owners of the TH685. It is audible in quiet scenes and during slower-paced content, though many people find it easy to tune out once gaming audio or a film soundtrack is playing. If you are particularly sensitive to background noise, this is worth factoring into your decision.

To get a 100-inch image, you need roughly 8.2 feet (about 2.5 meters) between the lens and the screen or wall. This short throw ratio makes setup manageable in most living rooms and basements without needing to mount it at the back of the room.

Yes, streaming dongles like Amazon Fire TV, Apple TV, and Google Chromecast all connect via the HDMI port without any issues. This is a popular setup for buyers who want a wireless streaming experience without a separate media player. Just keep in mind the projector itself has no built-in Wi-Fi.

Lamp life on projectors like this typically ranges from 3,500 to 6,000 hours depending on the brightness mode used. Lower brightness modes extend lamp life considerably. Replacement lamps are available through BenQ and third-party suppliers, so it is worth budgeting for an eventual replacement if you plan to use the projector heavily over several years.

BenQ's 3-year warranty covers the projector unit itself, but lamp coverage is typically more limited and usually only applies to manufacturing defects within a shorter window. It is worth reviewing the specific warranty terms on BenQ's website, as lamp wear from normal use is generally not covered under standard warranty policies.

It depends on your room and priorities. This gaming projector gives you a much larger image at a lower price than an equivalent-sized premium television, and the input lag is competitive enough for most gaming scenarios. The tradeoff is that you need a darker room, the image will not match a high-end OLED for contrast or black levels, and you will likely want external speakers. For a dedicated gaming space with good light control, it is a compelling option. For a bright main living room with multiple lighting sources, a large TV may serve you better.

Where to Buy

Techinn.com
BenQ TH685 1080p Gaming Projector
In stock $816.49
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Silarius
BenQ TH685 1080p Gaming Projector
In stock $941.99
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Reebelo USA
BenQ TH685 1080p Gaming Projector
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