Coaxial cables, with their inner conductor and protective layers, enhance audio systems when connected to a projector. They offer reliable performance, are light, easy to install, and boast impressive durability. While fiber may outpace coaxial cables in data transfer, coaxial remains ideal for networking, especially in expansive areas like campuses. 

Connect the cable wall outlet to the Cable In coax connector on the cable box using a coaxial cable. Then, link the other end to the composite video port on your projector, power on both devices and enjoy your favorite TV show!

How To Connect Coaxial Cable To Projector?

This article provides straightforward steps for connecting coaxial cables to projectors and helpful guidelines and FAQs for seamless projector operation. Dive in for a user-friendly guide to amplify your audio-visual experience.

Method 1 Direct Connection to Cable Box

1. Preparing the Equipment

As I set up the connection between my projector and cable box, I meticulously gathered the necessary tools – a coaxial cable and the cable box. Before proceeding, I ensured both devices were powered off, creating a clean slate for the installation process.

2. Locating Coaxial Port on Cable Box

Carefully examining the cable box, I searched for the coaxial output port, typically labeled “RF Out” or “Coax Out.” Spotting the designated port, I mentally prepared to initiate the connection.

3. Connecting Coaxial Cable to Cable Box

Taking one end of the coaxial Cable, I delicately inserted it into the identified coaxial port on the cable box. Ensuring a snug fit, I executed a clockwise twist to secure the connection firmly. This seemingly simple step marked the inception of a link between the cable box and my projector.

4. Locating Coaxial Port on Projector

With the cable box successfully connected, I shifted my focus to the projector. I aim to locate the coaxial input port, usually designated as “RF In” or “Coax In.” This particular port would receive the other end of the coaxial Cable.

5. Connecting Coaxial Cable to Projector

Guiding the opposite end of the coaxial Cable into the coaxial input port on the projector, I applied a clockwise twist, ensuring a secure and reliable connection. This interplay of coaxial cables was like establishing a bridge for the audio-visual signals between the cable box and the projector.

6. Powering On Devices

With the physical connections, I powered on the cable box and the projector. Waiting for the cable box to undergo its initialization process, I double-checked that the projector was ready for the next crucial step.

7. Checking for Signal

To validate the success of this direct connection, I tuned the cable box to a channel, eagerly observing the projector screen. The culmination of these efforts was confirmed as the projector seamlessly displayed the content from the cable box. It was a seemingly straightforward connection, yet the satisfaction derived from a perfectly synced display was immensely gratifying.

Method 2 Using a Coaxial to HDMI Adapter

Coaxial to HDMI Adapter

1. Gathering Equipment

Embarking on the second method, I meticulously gathered the required tools – a coaxial to HDMI adapter, an HDMI cable, and a power source for the adapter. This approach, leveraging modern technology, promised a more versatile connection between my cable box and projector.

2. Connecting Coaxial Cable to Adapter

With the coaxial to HDMI adapter, I connected one end of the coaxial Cable to its coaxial input. This initial step set the stage for transitioning from the analogue coaxial signal to a digital HDMI format.

3. Connecting HDMI Cable

The next phase involved the integration of digital signals. I plugged one end of the HDMI cable into the HDMI output port of the adapter, fostering the transition from the coaxial domain to the digital realm.

4. Connecting the Adapter to the Projector

I connected the other end of the HDMI cable to an available HDMI input port on the projector to ensure a seamless flow. This interconnection of cables and adapters was akin to orchestrating a symphony, harmonizing the various components for optimal performance.

5. Powering On the Adapter

As some adapters required an external power source, I meticulously connected them to ensure a stable conversion process. This step underscored the adaptability of technology to bridge the gap between disparate signal formats.

6. Powering On Devices

With all the interconnected components, I powered on the cable box and projector. Navigating through menus or using the remote control, I selected the HDMI input source on the projector, setting the stage for the grand reveal.

7. Verifying Signal

In a moment of anticipation, I confirmed that the projector displayed content from the cable box through the HDMI adapter. The successful execution of this method showcased the adaptability of modern technology, transforming coaxial signals into vibrant digital imagery.

Here, I’m adding a YouTube video discussing the conversion of a coaxial cable to HDMI. Check it out for insights on the process and solutions to this common query. The video provides visual clarity and detailed explanations for a comprehensive understanding.

Method 3 Through a Home Theater Receiver

1. Preparing Equipment

Venturing into the realm of home theater integration, I gathered a coaxial cable, a home theater receiver, and speaker cables if necessary. This method promised audio-visual synergy and the potential to integrate multiple entertainment sources seamlessly.

2. Connecting Coaxial Cable to Receiver

The focal point of this setup was the home theater receiver. Locating the coaxial input port labeled “Coax In,” I inserted one end of the coaxial Cable. A tactile twist secured the connection, establishing the first link in a sophisticated audio-visual network.

3. Connecting Receiver to Projector

Elevating the connection beyond direct device links, I employed an HDMI cable to bridge the home theater receiver and the projector. This expanded the scope, enabling a centralized audio and video distribution hub.

4. Connecting Other Devices (Optional)

Capitalizing on the home theater receiver’s potential, I connected additional entertainment sources like a Blu-ray player or gaming console. Each connection was methodically executed, expanding the possibilities for a comprehensive home entertainment system.

5. Powering On Devices

Initiating the power-up sequence, I ensured a synchronized activation of the cable box, connected devices, home theater receiver, and projector. With a vigilant eye, I selected the appropriate input source for the receiver, laying the foundation for a multi-faceted entertainment experience.

6. Adjusting Settings (If Necessary)

The versatility of a home theater receiver extends beyond mere connections. I fine-tuned audio settings with its remote control, ensuring a harmonious blend of sound and visuals. This meticulous calibration personalized the experience to align with my preferences.

7. Verifying Signal

The ultimate test involved confirming that the projector seamlessly displayed content from the cable box, with the audio orchestrated through the home theater receiver. While more intricate, this method elevated the home entertainment experience, weaving a complex tapestry of audio-visual delight.

I’ve shared various methods here, but for more in-depth discussions and additional guidance, check out this AVS forum. The community has extensively discussed this topic, offering valuable insights and assistance. Explore the forum for a more enriched understanding of the subject.

Now that you’ve understood all the methods, let’s move on to some FAQs. I’ve anticipated questions you might have and provided answers below for your convenience.


1. Can I connect a coaxial cable directly to my projector?

No, projectors typically don’t have built-in cable tuners. You’ll need to connect the coaxial Cable to a cable box first and then link the box to the projector using the appropriate video output.

2. What if my projector lacks a composite video port?

In such cases, you may need an adapter. Convert the coaxial signal to a compatible format like HDMI using a coaxial to HDMI adapter, and connect it to an available HDMI port on your projector.

3. Is there a difference between using coaxial and HDMI for projectors?

Yes, HDMI generally provides better image quality and supports higher resolutions. If your projector has HDMI ports, it’s advisable to use HDMI for optimal performance.

4. Can I use a coaxial cable for audio as well?

While coaxial cables can transmit audio signals, projectors may require a separate audio connection. For better sound quality, consider using additional audio cables to connect your cable box to an external audio system.

5. Do I need to power off the projector before connecting the coaxial Cable?

Powering off all devices, including the projector, is recommended before making any connections. Once the Cable is securely connected, power on the devices in sequence: cable box first, then the projector, for a smooth setup.


These detailed step-by-step guides encapsulate the immersive journey of connecting a coaxial cable to a projector. Whether opting for a direct link, leveraging technology with an adapter, or embracing the complexity of a home theater receiver setup, each method provides a unique avenue for creating a personalized and enriching entertainment experience. Always refer to device manuals for nuanced instructions tailored to specific models, ensuring a seamless integration of technology into your audio-visual domain.



Fernando Shrader

Hey, It’s me, Fernando Shrader. I’m the creator of this website. You might wonder why I’ve created this blog and what’s the difference between Visual Finds and other online blogs. As a professional technician working for the last 8 years with projectors, I though this is the right time to share what I’ve learned in this journey with an online audience so they can see what I’m doing and how they can solve their problems! Happy Learning!