Dual HDMI Projector vs Single HDMI Port Projector, What’s the Difference?

By XGIMI Tech - 2025-04

What Are Dual HDMI Projector and Single HDMI Projector?

Most projectors are equipped with an HDMI input port for audio or video transmission. This kind of connection promises a reliable, stable, and safe connection to mobile phones, laptops, game consoles, sound bars, and other devices.

Some models have two ports (Dual HDMI Projector) and some have one (Single HDMI Projector). Although it seems that there is only a difference of one HDMI input between them, the impact caused by the actual use of the impact can not be ignored. Let's take a look at what they are different, and how you should choose.

Dual HDMI vs Single HDMI Input Port Projector

We recommend a smart projector with two HDMI input ports rather than a single port since the former provides a more convenient and quality-guaranteed transmission for video and audio.

Why Do You Need a Dual HDMI Projector?

Multiple devices may be supported without switching cables thanks to dual HDMI ports on projectors that keep audio and video separate for reliability.

1. Functional Differentiation: Conducive to the Daily Use of Arrangements to Simplify Wiring

Dual HDMI port projectors usually come with one HDMI-ARC/eARC port and one normal HDMI port.

The ordinary HDMI port can be used to connect video signal sources, such as game consoles, and Blu-ray players, focusing on transmitting high-quality video. The HDMI-ARC/eARC port connects to audio devices such as sound bars, external speakers, etc., and is capable of directly transmitting lossless audio tracks such as Dolby Atmos, suitable for home theater scenarios.

Dual HDMI 4K projectors like XGIMI AURA 2, and HORIZON S Max which are specially built for home theater will come with two HDMI ports.

2. Multi-device Compatibility: Access Devices at the Same Time and Enable Flexible Switching

When one HDMI (1) (ARC/eARC) of the projector is connected to the sound wall, and the other HDMI (2) is connected to a game console like PS5, the projector can simultaneously receive the game screen (HDMI-2) and return audio to the stereo (HDMI-1). With the remote control, users can freely switch the signal source between (1) and (2) without plugging or unplugging cables on the dual HDMI projectors.

3. Bandwidth Allocation: Dual HDMI Design Reduces Signal interference of A/V Transmission

If a single interface transmits video + audio at the same time, the stability may be affected under high loads, such as transmitting 4K@120Hz + panoramic sound for gaming scenes. Dual HDMI projector with dual interface division of labor can reduce the pressure and guarantee the picture and sound quality. 

Can a Projector with a Single HDMI Port Meet Your Needs?

Single-HDMI projectors are frequently enough for daily use, like watching TV shows on Netflix, connecting it to a phone, and using it as a Bluetooth speaker. Core functions like mirroring a laptop screen, playing games on a PS5, and streaming movies on an Apple TV can all be done with a single HDMI 2.0/2.1 connector.

Compactness is prioritized above multiple connections in portable projectors like MoGo 3 Pro, which makes them perfect for installations that require mobility. The single HDMI port represents a more flexible use instead of professional output.

Conclusion

Compared to a single-HDMI model, dual-HDMI versions, however, could be more useful for consumers who want simultaneous 4K@120Hz gaming and lossless music via eARC. Ultimately, a single HDMI projector is an affordable, clutter-free option if mobility and simplicity outweigh the need for multiple devices.