BenQ LH830ST VS BenQ LK830ST

In terms of general characteristics, the BenQ LH830ST and BenQ LK830ST are remarkably similar siblings. Both projectors share a laser light source, identical 200-hour lamp life, the same 320W operating power consumption, and equal acoustic profiles of 33 dB standard and 29 dB in eco mode — meaning neither has an edge in running costs, longevity, or noise in day-to-day use.

The one tangible differentiator in this group is physical size. The LH830ST measures 279.2 × 120.5 × 229.3 mm, while the LK830ST is slightly larger at 296 × 120 × 232 mm, resulting in a meaningfully larger footprint volume — roughly 8,241 cm³ versus 7,714 cm³. Despite this size gap, both units weigh an identical 3,400 g, which means the LH830ST achieves a marginally better weight-to-volume ratio. In practical terms, the LH830ST will fit more easily into tight installation spaces or carry bags.

For this spec group, the LH830ST holds a modest advantage purely on the basis of its more compact chassis — all other general specs being equal. If space efficiency or portability is a priority in your installation, the LH830ST is the better choice; if physical dimensions are not a constraint, the two models are effectively tied here.

The most consequential difference in this group comes down to two tightly linked specs: output resolution and bit depth. The LH830ST outputs at 1080p with a 10-bit color depth, while the LK830ST steps up to 4K resolution and a substantial 30-bit color depth. At typical large-screen projection sizes — both models cap at 180″ — the jump from 1080p to 4K translates to noticeably sharper text, finer detail in images, and a significantly smoother color gradient rendering thanks to the expanded bit depth. For presentations with dense data visuals or cinematic content, that distinction is tangible.

Where the two models converge is equally worth noting. Both deliver 4000 ANSI lumens, share an identical 16.7 ms response time and 60Hz refresh rate, and support the same HDR formats — HDR10 and HLG — while neither supports HDR10+ or Dolby Vision. The short-throw geometry is also identical, with a 0.5 m minimum throw distance, making both suitable for space-constrained rooms. Focus adjustment is manual on both units, with no motorized zoom or focus on either.

The LK830ST holds a clear advantage in this group. Its 4K resolution and 30-bit color pipeline make it the stronger choice for any use case where image fidelity matters — whether that is detailed visual presentations, large-venue display, or video content. The LH830ST's 1080p output is perfectly capable for general-purpose projection, but if resolution and color depth are priorities, the LK830ST is the definitive pick.

Connectivity is the one area where choosing between the LH830ST and LK830ST requires no deliberation at all — the two projectors are completely identical across every specification in this group. Both carry a single HDMI port, two USB ports, and an S/PDIF optical audio output, with no VGA, DVI, or wired Ethernet (RJ45) on either unit.

On the wireless side, the picture is equally symmetrical. Both models support Wi-Fi, Bluetooth, AirPlay, Chromecast built-in, and Miracast — a comprehensive suite that covers virtually every mainstream screen-mirroring and streaming ecosystem. In practice, this means users can cast wirelessly from Apple, Android, and Windows devices without adapters or additional hardware, regardless of which model they choose.

This group is a complete tie. Neither projector holds any connectivity advantage over the other, and the decision between them should rest entirely on the differentiators identified in other spec groups — namely resolution and physical size.

Across most feature specs, the LH830ST and LK830ST are once again in lockstep — both include a built-in smart TV platform, a remote control, and a mono built-in speaker, while neither offers stereo speakers or Dolby Atmos. The smart TV integration is worth highlighting as a genuine usability perk, allowing standalone content playback without any external source device.

The sole differentiator here is audio output power, and it is a significant one. The LH830ST's speaker is rated at a modest 1 × 2W, which is barely sufficient for a quiet room and will struggle in any environment with ambient noise. The LK830ST, by contrast, delivers 1 × 15W — more than seven times the power output. In practical terms, this means the LK830ST can fill a mid-sized room with audible, usable sound without an external speaker, whereas the LH830ST's 2W output is realistically only adequate as a temporary or fallback option.

The LK830ST holds a clear advantage in this group. While neither projector is designed to replace a dedicated audio system, the 15W speaker meaningfully expands the LK830ST's usefulness for standalone deployments — classrooms, meeting rooms, or casual viewing — where connecting external audio is not always practical.