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  3. TK705STi vs LX720-4K

BenQ TK705STi vs ViewSonic LX720-4K

What TK705STi does better (3) and where LX720-4K wins (3) — every spec side by side.

BenQ TK705STi
BenQ · 2025TK705STi
7.5Score
3 advantages≈ US$1,300
vs
ViewSonic LX720-4K
ViewSonic · 2025LX720-4K
7.8Score
3 advantages≈ US$1,500
Higher score
6.9Picture8.0
8.0Noise, lifetime & portability5.1
Dimensions

Size comparison

TK705STiLX720-4K
229 × 168250312 × 104234
TK705STiLX720-4KDifference
Height168 mm104 mm+64 mm
Width229 mm312 mm−83 mm
Depth250 mm234 mm+16 mm
Weight3.8 kg3.5 kg+0.3 kg

Drawn to the same scale from the official dimensions (front and side).

Why is TK705STi better than LX720-4K?

  1. Automatic keystone correctionYes · LX720-4K: No
  2. Built-in speakers (total output)16 W vs 10 W+60%
  3. Fan noise26 dB vs 32 dB+23%

Why is LX720-4K better than TK705STi?

  1. Brightness (ANSI / ISO lumens)3,000 lm vs 3,500 lm+17%
  2. Contrast ratio (dynamic / claimed)700:1 vs 300,000:1428.6×
  3. Weight3.8 kg vs 3.5 kg+9%
Specifications

Side by side

BenQ TK705STiBenQ TK705STi≈ US$1,3007.5
ViewSonic LX720-4KViewSonic LX720-4K≈ US$1,5007.8
Picture
Resolution (on screen)3840 × 2160 (4K UHD)3840 × 2160 (4K UHD)
Native panel resolution1920 × 1080 (Full HD)1920 × 1080 (Full HD)
4K method4K by pixel shifting4K by pixel shifting
Display technologyDLPDLP
Light sourceLEDLaser
Brightness (ANSI / ISO lumens)3,000 lm3,500 lm
Native contrast ratio600,000:1—
Contrast ratio (dynamic / claimed)700:1300,000:1
HDR supportYes—
HDR formatsHDR10+, HDR10, HLG—
Colour gamut (Rec.709)98%—
Gaming
Input lag5 ms—
Maximum refresh rate60 Hz—
Game / low-latency modeYes—
Lens & placement
Throw ratio0.8:1—
Throw typeShort throw (0.4–1.0:1)—
Distance for a 100″ 16:9 image1.77 m—
Largest image size—300″
Keystone correctionYesYes
Automatic keystone correctionYesNo
Sound
Built-in speakers (total output)16 W10 W
Smart & streaming
Smart platformGoogle TV—
Built-in smart platformYes—
Netflix (officially licensed)Yes—
Wi-FiYesYes
BluetoothYesYes
Chromecast built-inYes—
Internal storage—8 GB
Connectivity
HDMI inputs22
HDMI eARCYes—
USB portYesYes
Ethernet (LAN)NoNo
VGA inputNoNo
Audio outputYesYes
Battery, power & lifetime
Power consumption250 W—
Light source life20,000 h20,000 h
Light source life (eco mode)30,000 h30,000 h
Design & noise
Fan noise26 dB32 dB
Fan noise (eco mode)—26 dB
Weight3.8 kg3.5 kg
Width229 mm312 mm
Height168 mm104 mm
Depth250 mm234 mm
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