BenQ HT2150ST and BenQ TH690ST are both gaming projectors with short throws, and they have close price tags and similar configurations. In this post, we will compare the two projectors from different perspectives, helping you to make a wise decision.
Through the side-by-side parameter comparison, we can find that BenQ HT2150ST is slightly cheaper while BenQ TH690ST is slightly brighter. In addition, BenQ TH690ST has longer lamp life.
Let’s dig into the details and differences between the two projectors in the following parts.
BenQ HT2150ST and BenQ TH690ST are similar in shape, but they are slightly different in terms of color matching and outer design.
BenQ HT2150ST has many roundish elements in the outer design while BenQ TH690ST has many rectangular elements in the design.
For the front panel, BenQ HT2150ST is whole silver color while BenQ TH690ST is decorated in black color. The optical lens modules are both located on the right side. Regarding the top panel, the two projectors are similar, which have shortcut buttons on the right side and a pronounced logo on the left side. The back panels are equipped with various interfaces for connecting to external devices.
As for size and weight, BenQ HT2150ST measures 380.5 x 121.7 x 277mm, which is slightly smaller than BenQ TH690ST, but their weights are the same.
| Models | BenQ HT2150ST | BenQ TH690ST |
| Size (WxHxD) | 380.5 x 121.7 x 277mm | 366 x 244 x 118mm |
| Weight | 3.6kg | 3.6kg |
The two projectors have the same 1080P resolution, but they are different in terms of brightness and contrast. BenQ HT2150ST has 2,200 ANSI lumens while BenQ TH690ST has 2,300 ANSI lumens. That is to say, BenQ TH690ST is slightly brighter. BenQ HT2150ST has a contrast of 15,000:1 while BenQ TH690ST has a contrast of 500,000:1. That is to say, BenQ TH690ST has higher color gradation and more details in the projection image.
Regarding screen size, BenQ HT2150ST can project a max screen of 300 inches while BenQ TH690ST can project at most 200 inches. In view of the two projectors having the same throw ratio, BenQ HT2150ST is better in terms of image size.
| BenQ HT2150ST | BenQ TH690ST | |
| Resolution | 1080P | 1080P |
| Contrast | 15,000:1 | 500,000:1 |
| Brightness | 2,200 ANSI lumens | 2,300 ANSI lumens |
| Image Size | 60-300 In | 30- 200 In |
As for the light source, BenQ HT2150ST adopts a lamp as the light source while the newer model BenQ TH690ST adopts 4LED as the light source. For lamp life, BenQ HT2150ST has a lamp life of 3500 hrs while BenQ TH690ST has a long lamp life of 20,000 hrs. If you use the projector for 5 hours each day, then you can use BenQ HT2150ST for about no more than 2 years, and you can use the BenQ TH690ST for more than 10 years.
| Models | BenQ HT2150ST | BenQ TH690ST |
| Light Source | Lamp | 4LED |
The two projectors are both positioned as gaming projectors. Let’s compare the gaming performance of the two projectors. BenQ HT2150ST has the same input lag of 16.67ms as BenQ TH690ST under 1080p@120Hz. In terms of gaming mode, BenQ HT2150ST has no special dedicated game mode while has two special game modes. The dark and light game modes of BenQ TH690ST can improve the visual effect when you play games and deliver a vivid and immersive experience.
| BenQ HT2150ST | BenQ TH690ST | |
| Input Lag | 1080p@60Hz: 16.67 ms | 1080p@120Hz: 8.33 ms 1080p@60Hz: 16.67 ms |
| Special Game Mode | / | Bright/Dark |
BenQ HT2150ST and BenQ TH690ST are both equipped with various interfaces, including an HDMI interface, USB interface, audio input, and output. Compared with BenQ HT2150ST, BenQ TH690ST is better in terms of HDMI versions. BenQ TH690ST is compatible with HDCP 2.2, a higher version than HDCP1.4.
| Models | BenQ HT2150ST | BenQ TH690ST |
| Interfaces | HDMI-1(1.4a/HDCP1.4) HDMI-2 (1.4b/HDCP1.4/MHL) USB Type A-1 (2.0/Power Supply1.5A) USB Type Mini B-1(service) RS232 in (DB-9pin) (x1) DC 12V Trigger (3.5mm Jack) (x1) Audio in (3.5mm Mini Jack) (x1) Audio out (3.5mm Mini Jack) (x1) | HDMI-1 (2.0b/HDCP2.2) HDMI-2 (2.0b/HDCP2.2) USB Type A-1 (2.0/Power Supply2.5A/Service) RS232 in (DB-9pin) (x1) Audio in (3.5mm Mini Jack) Audio out (3.5mm Mini Jack) Audio out (S/PDIF) |
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In terms of audio, BenQ HT2150ST is equipped with two 10W speakers while BenQ TH690ST has two 5W speakers. Compared with BenQ TH690ST, BenQ HT2150ST is more powerful.
The noise is a key factor for a good audio effect. BenQ HT2150ST has a noise range of 29/27 dB while BenQ TH690ST has 33/28 dB under Typical Mode and Eco Mode.
For audio output, BenQ TH690ST has a S/PDIF interface for audio output to improve the audio effect.
| Models | BenQ HT2150ST | BenQ TH690ST |
| Speakers | 10W Chamber*2 | 5W Chamber*2 |
| Noise | 29/27 dB | 33/28 dB |
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Aster comparing the two projectors from different aspects above, we can conclude that BenQ HT2150ST has lower cost, bigger image size, more powerful sound, and lower noise, while BenQ TH690ST has better image quality, longer lamp life, and better connectivity.
| Models | BenQ HT2150ST | BenQ TH690ST |
| Pros | Lower Cost Bigger Image Size Powerful Sound Lower Noise | Better Image Quality Longer Lamp Life Better Connectivity Special Game Modes |
| Cons | No HDMI 2.0 | Big Noise Smaller Image Size |
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