What is a Low Ohm Cable? All About Impedance and Signal Loss

There are so many cable specs and safeties that it’s easy to get overwhelmed trying to source the perfect cable for any given application. That’s why having an expert on hand like AudioVideoElectric.com to help you navigate the process is so important.

Today, we’ll narrow our focus to discuss impedance and signal loss, unpacking Ohm - specifically, low-ohm cables and their benefits/applications. The most common impedance ratings are 50 ohms and 75 ohms, but which is right for you? 

We’ll help you find out below and introduce you to the #1 bulk coaxial cable selection online, right here at AudioVideoElectric.com. Shop now or reach out for top-tier wiring solutions at an unbeatable price!

What is a Low Ohm Cable? Overview of the Different Ratings

So, what is a low ohm cable? As we touched on already, the lowest impedance ratings you’ll find for coaxial cables are 50 ohm to 75 ohm, but what exactly does this mean? Let’s take a step back and explain ohms in general.

In simple terms, ohms represent the resistance or impedance of a cable. The lower the ohm rating, the less resistance the cable has to the flow of electrical signals.

This is why low ohm cables are often used in high-performance applications where efficient energy transfer is of the utmost importance, such as in audio systems, power systems, or industrial settings. We’ll talk more about their applications in a moment.

On the other hand, higher ohm cables are used where minimizing interference is the priority, such as in television and data transmission. This means that you may or may not need a low ohm cable, you may prioritize EMI deterrence instead.

That being said, let’s look at the benefits of these types of cables below and some of the most common applications for a low ohm cable. 

Benefits of Low Ohm Cable and Common Applications

The primary benefit of these cables is their ability to avoid signal loss over shorter distances. They can handle high-frequency signals which is why they’re used in applications where consistent, stable signal strength is necessary.

But, they’re also built with materials that provide resistance to electromagnetic interference (EMI) and signal degradation, making them essential for maintaining signal quality in RF environments.

As such, you’ll find them used in scenarios such as:

• Wireless Communications: Wi-Fi, cellular, and satellite communications all need strong signal retention and minimal loss. A 50-ohm cable is perfect for these use cases.
• RF and Antenna Systems: These cables are also common in radio transmitters, broadcasting stations, and base stations where efficient power delivery is crucial.
• Laboratory and Testing Equipment: 50-ohm cables are also used in RF testing equipment and oscilloscopes to measure signals with minimal distortion.

You can learn more about multi-conductor uses and what is a coaxial cable used for in our blog. But let’s get into some tips on choosing the right low-ohm cable for your unique needs.

Choosing the Right Low Ohm Cable for Your Use Case

You don’t have to stress about picking the perfect cable for your specific application. AudioVideoElectric.com is always a click or call away ready to help you make an informed choice.

We’ll walk you through the most important criteria to consider below to set you up for success in choosing the optimal cable, but remember - personalized assistance is within reach!

• Application Type: In RF applications like Wi-Fi, cellular networks, or antennas, 50-ohm coaxial cables are standard due to their efficiency in transmitting power with minimal loss. You might need a different type of cable if you're working with data and video, such as in satellite TV or broadband, but low ohm is preferred in power-critical scenarios.
• Frequency Requirements: If your system operates at high frequencies (like GHz) make sure the cable can keep up. Lower impedance cables like 50 ohms are a great choice because they offer better performance at these higher frequencies.
• Signal Quality and Integrity: Low ohm cables are inherently designed to minimize signal reflection and interference, but you should still look for cables with strong shielding to protect against EMI which can degrade signal quality.
• Cable Length: Longer cable runs can introduce signal loss, so low-loss variants of low ohm cables are often necessary to maintain signal strength over distance. Shorter runs may be more forgiving, but always consider the specific needs of your system.
• Environment: Where the cable will be installed also matters. For example, areas with high levels of interference or harsh environmental conditions need well-shielded and durable cables. Outdoor applications may require cables with additional weatherproofing, while indoor installations may prioritize flexibility.
• Budget Considerations: While price is always a factor, you should never cut corners as this will impact performance. Low ohm cables are often most expensive, but you get what you pay for. Investing in the right cable upfront can prevent costly issues down the line. Don’t worry - we’ll introduce you to the best of both worlds here at AudioVideoElectric.com!
• Industry Standards and Compliance: The cable you choose must comply with industry standards relevant to your application. This might include RF safety standards, signal transmission protocols, and more. This will help you avoid issues down the road.

There’s clearly a lot to consider, and it’s natural to feel stressed and uncertain about your next steps. So, don’t play the guessing game. Get in touch with the experts here at AudioVideoElectric.com and we’ll steer you in the right direction!

Source Reliable, Affordable Low Ohm Cables at AudioVideoElectric.com Today!

Our company has become the go-to choice for all your cable sourcing needs, from coax to multi conductor cable styles. What sets us apart is our Belden alternative cables, which offer the top-tier performance and reliability you need at a far more affordable price point.

These are identical to their branded counterparts in fit and form - the only difference is the brand name and the cost. We even have the spec sheets on hand if you’re skeptical.

We’re proud to have helped countless individuals and organizations save money without compromising on performance. In fact, we’ve saved some companies more than $86,000 annually, while others have enjoyed a 65% reduction in their cable costs. See all our success stories here!

Whether you’re looking for low ohm cables or high ohm cables, we’ve got you covered with the optimal wiring solution. You can find all the different gauges and lengths you need, too. Browse our catalog or reach out today for help perfecting your cable setup!

Parting Thoughts on Low Ohm Cables

So, what is a low ohm cable? In closing, these provide efficient power transmission and minimal signal loss, making them the go-to choice for high-frequency applications like RF communication and wireless systems.

High ohm cables have their place too, though, so consider your unique use case and determine which style makes the most sense. Take into account signal strength, cable length, and environmental factors to make the optimal choice.

Find additional resources in our blog like how to test a coaxial cable, multi-conductor cable types, conduit fill calculator, single conductor vs multi conductor cable, the advantage of stranded conductor over solid conductor, and more. 

Otherwise, it’s time to take the next step in sourcing your low-ohm cables at AudioVideoElectric.com, where you’ll experience the best of both worlds - reliable performance at the lowest price possible.

With world-class customer service every step of the way, what more could you ask for? Don’t compromise on signal strength or efficiency. Equip your project with reliable low cables today!