BenQ HT5705 vs BenQ TH685

BenQ HT5705 and BenQ TH685 are both DLP projectors. What are the differences between them?

In terms of resolution, BenQ HT5705 has 4K resolution while BenQ TH685 has 1080P resolution. Regarding brightness, BenQ HT5705 has 2,000 ANSI lumens while BenQ TH685 has 3,000 lumens. That’s to say, BenQ HT5705 is better in resolution but BenQ TH685 is brighter. In terms of contrast, BenQ HT5705 has a contrast of 100,000:1 while BenQ TH685 has 10,000:1. In other words, BenQ HT5705 has more details in the image.

Product Name

BenQ HT5705

BenQ TH685

Product Image BenQ HT5705 BenQ TH685
Our Rating 8.3 7.8
Brand BenQ BenQ
Category projector projector

Optical Parameters

BenQ HT5705BenQ TH685
Brand Brand BenQ BenQ
Brand Model Brand Model BenQ HT5705 BenQ TH685
Brightness (ANSI lumens) Brightness (ANSI lumens) 2000 ANSI lumens 3500 lumens
Display Chip Display Chip DMD chip
Display Technology Display Technology DLP
Standard Resolution Standard Resolution 4K(3840*2160)
Maximum Supported Resolution Maximum Supported Resolution 4K(3840*2160)
Image Contrast Ratio Image Contrast Ratio 100000:1 10000:1
Throw Ratio Throw Ratio 1.36-2.18(100"@3m)
Keystone Correction Keystone Correction Automatic, vertical: ± 40 degrees
Automatic, vertical: ± 30 degrees
Lamp Life Lamp Life Normal mode: 4000 hours, economic mode: 10000 hours, intelligent power saving mode: 8000 hours Normal mode: 4000 hours, economic mode: 8000 hours, intelligent power saving mode: 10000 hours
Lamp Type Lamp Type Ultra high pressure mercury lamp
Ultra high pressure mercury lamp

Projection Parameters

BenQ HT5705BenQ TH685
Product type Product type Home projector Commercial projector
Image Size Image Size,projector1 60-200 / 300 inches 60-200 inches30-300 inches
Screen ratio Screen ratio 16:9 16:9
Screen color Screen color Cinematiccolor color tuning technology meets the dci-p3 color quasi wide color gamut standard


BenQ HT5705BenQ TH685
I/O Connection Ports Connection Ports 1 x HDMI (2.0 b)
Output interface 1× audio output (Mini Jack)
1 x SPDIF audio out
Control interface 3 x USB (Type-A)
1 x USB (Type Mini-B)
1×12V Trigger (3.5mm Jack)
1×RS-232 In (D-SUB 9 pin)
1 x RJ 45 LAN
1×Computer in (D-sub 15 pins)
2 x HDMI (2.0)
1 x HDCP (2.2)
1× audio input
Output interface 1× audio output
Control port 1 x USB
1 x RS - 232
2 x infrared
2 x LumiExpert


BenQ HT5705BenQ TH685
Size(HxWxD) Size(HxWxD) 492×168×349mmmm 312×110×225mm
Power Usage Power Usage 297W, standby power: < 0.5W
Machine weight Machine weight 6.5kg 2.79kg
Accessories Accessories Projector   x1
Power cord (3m)   x1
Remote control (with battery)   x1
warranty card   x1
User manual CD   x1
User manual   x1
Lens cap   x1
Projector   x1
Remote control   x1
power cord   x1
User manual CD   x1
Warranty card by Region   x1
User manual   x1
Warranty Warranty 3 years
other other Lens displacement range: vertical ± 60%, horizontal ± 23%
HDR Pro Technology, ISF certification, cinemamaster Video + image enhancement, cinemamaster audio + 2 sound enhancement, color enhancement, pixel enhancement, skin color optimization