Best Low Loss Coax Cable: 9 Top Cables Rated 2025

When I started setting up my new amateur radio station and simultaneously upgrading my home entertainment system, I quickly realized that the generic cables I was using were eating up my signal strength. Finding the best low loss coax cable is crucial because every decibel saved means clearer video, better data throughput, or stronger radio transmission. We’ve tested and compared nine of the top-performing coaxial cables on the market today to help you find the right fit for your specific application, whether you need 75 Ohm for video or 50 Ohm for RF communication.

IMAGE	PRODUCT NAME	AMAZON LINK
	GE RG6 Coaxial Cable, 25 ft. F-Type Connectors, Double…	View on Amazon
	RELIAGINT 25ft, RG6 White Coaxial Cable with F Pin…	View on Amazon
	MOOKEERF 50ft KMR400 PL259 Male to Male Coaxial Cable -…	View on Amazon
	GE RG6 Coaxial Cable, 6 ft. F-Type Connectors, Double…	View on Amazon
	YOTENKO RG58 Coaxial Cable 49.2ft, CB Coax Cable, UHF…	View on Amazon
	XRDS KMR 400 UHF Coax Cable – 75FT, PL-259 UHF…	View on Amazon
	MOOKEERF RG8X Coaxial Cable 100ft,Low Loss 50 ohm RG 8X…	View on Amazon
	Bolton400 -LMR®400 Equivalent Coaxial Cable 100ft – Heavy…	View on Amazon
	G-PLUG RG8X Coaxial Cable 6FT – 50 Ohm Low-Loss Coax…	View on Amazon

GE RG6 Coaxial Cable, 25 ft. F-Type Connectors, Double Shielded Coax, Input Output, Low Loss Coax, Ideal for TV Antenna, DVR, VCR, Satellite Receiver, Cable Box, Home Theater, White, 33604

If you need a reliable, standard cable for typical home theater connections, this 25-foot GE RG6 cable is a solid choice. It features double shielding to help minimize interference from external sources, ensuring your satellite or TV signal remains crisp. The low-loss design is effective for runs within a single room or short distances, and the F-type screw-on connectors make installation incredibly fast and secure, requiring absolutely no specialized tools.

Key features that stand out:
– Double-shielded design for interference protection.
– Nickel-plated connectors for consistent connectivity.
– Convenient screw-on F-Type connections.

Pros:
– Excellent value for standard home AV needs.
– Reliable low-loss performance for indoor use.
– Easy, tool-free installation.

Cons:
– Specifically rated for indoor use only.

Best for: Standard indoor connections for cable boxes, DVRs, and short-run antenna setups.

Expert Opinion: This is a fantastic general-purpose RG6 cable. While it isn’t designed for heavy-duty outdoor exposure or extremely long runs, its low signal attenuation profile makes it a considerable upgrade over older, single-shielded coax found in many homes.

RELIAGINT 25ft, RG6 White Coaxial Cable with F Pin Connector, F81 Double Female Extension Adapter, Low Loss High Speed Coax Cable Cord Extender for HD TV, Dish,Satellite, Antenna, TV Cable 25′

The RELIAGINT RG6 cable provides flexibility by including handy adapters right in the kit, making it highly versatile for home setups. This cable features high shielding effectiveness, protecting your signal from common electromagnetic interference like phone signals. Crucially, this 75 Ohm cable is built with durable, weather-protect satellite coaxial cable F connectors, allowing for reliable indoor or outdoor use, making it great for satellite dishes or external antennas.

Key features that stand out:
– Rated for reliable indoor and outdoor use.
– High shielding effectiveness to enhance signal clarity.
– Includes F81 female-to-female adapter and TV male leads for easy extension.

Pros:
– Versatile kit with useful adapters included.
– Good performance in high-definition video applications.
– Robust construction holds up well to weather.

Cons:
– The white color may not suit all outdoor installations aesthetically.

Best for: Extending existing satellite or antenna lines, especially where outdoor durability is needed.

Expert Opinion: This set is perfect for the homeowner who needs a reliable extension solution without having to run out and purchase adapters separately. The low loss properties combined with the weatherproofing make it a standout choice for exterior antenna feeds.

MOOKEERF 50ft KMR400 PL259 Male to Male Coaxial Cable – Low Loss UHF Cable for HAM Radio, VHF Radio, SWR Meter, Antenna Analyzer

When dealing with high-frequency radio applications like HAM or CB, signal loss quickly becomes critical. The MOOKEERF KMR400 (equivalent to LMR-400) is engineered specifically to minimize this loss, boasting a figure of less than 2.8dB at 450MHZ over 50 feet. It features professional construction, including copper-clad aluminum conductors and tinned copper braid, and uses an adhesive heat shrink tube at the connector ends to prevent moisture intrusion and connector pull-out—a huge plus for longevity.

Key features that stand out:
– Ultra-low loss KMR400 specification (50 Ohm).
– Excellent SWR (Standing Wave Ratio) performance (≤ 1.25).
– Durable, waterproof PVC jacket suitable for outdoor environments.

Pros:
– Significant loss reduction compared to standard RG58.
– Built tough to resist oxidation and corrosion.
– Professional-grade assembly with heat shrink protection.

Cons:
– The thick diameter makes it less flexible than RG58.

Best for: Fixed base amateur radio installations and long-distance HF/VHF applications requiring minimal signal attenuation.

Expert Opinion: If you are serious about optimizing power transfer to your antenna, investing in a KMR400-type cable is essential. The low loss characteristics over 50 feet guarantee a much better performance baseline than standard communication cables.

GE RG6 Coaxial Cable, 6 ft. F-Type Connectors, Double Shielded Coax, Input Output, Low Loss Coax, Ideal for TV Antenna, DVR, VCR, Satellite Receiver, Cable Box, Home Theater, White, 33602

This shorter, 6-foot version of the GE RG6 cable is perfect for connecting devices that are located very close together, like a TV to a cable box, or a modem to a wall outlet. For these short distances, the benefit of a low loss coax cable might seem minimal, but the double shielding still provides excellent protection against electromagnetic noise present in crowded entertainment centers. The F-type connectors offer quick, secure engagement without complex tools.

Key features that stand out:
– Short, manageable 6-foot length for proximity connections.
– Double shielded protection.
– Low loss characteristics even over short runs.

Pros:
– Ideal for neat, close-range setups.
– Consistent GE quality and reliability.
– Cost-effective solution for device hookup.

Cons:
– Not suitable for installations that require running through walls or outdoors.

Best for: Connecting devices directly within an entertainment cabinet or tight space.

Expert Opinion: Don’t underestimate the quality of a low loss cable even for a 6-foot run. Using a high-quality, shielded cable like this eliminates potential noise that cheaper jumper cables often introduce right at the source device.

YOTENKO RG58 Coaxial Cable 49.2ft, CB Coax Cable, UHF PL259 Male to Male Coaxial 50 Ohm Coax Low Loss for HF VHF CB Radio, Ham Radio, SWR Meter, Scanner, Antenna Analyzer

For users needing a 50 Ohm cable that offers a good blend of performance and flexibility, the YOTENKO RG58 is a great choice. RG58 is much thinner and easier to manage than the thick LMR400 equivalents, making it popular for mobile installations or temporary setups. This version ensures low-loss transmission through its bare copper inner conductor and robust braid/aluminum foil outer conductor. Notably, it features a lengthened 6cm heat shrink tube at the connector ends for enhanced durability against pulls and bends.

Key features that stand out:
– Flexible RG58 cable type for ease of routing.
– High-quality bare copper inner conductor.
– Lengthened heat shrink protects against connector detachment.

Pros:
– Excellent flexibility for mobile or constrained installations.
– Good low-loss performance for a thinner cable type.
– Suitable for a wide range of RF applications (0-300MHz).

Cons:
– Signal loss will be higher than the specialized LMR-400 equivalents over the same distance.

Best for: Mobile CB radio installations, field day operations, or short, flexible HAM radio jumpers.

Expert Opinion: If flexibility is paramount, RG58 is your friend. The YOTENKO cable improves on standard RG58 construction by beefing up the connector junctions, which are usually the first point of failure in standard mobile coax.

XRDS KMR 400 UHF Coax Cable – 75FT, PL-259 UHF Male, Low Loss 50 ohm CB Cable for Ham Radio, Two-Way Radio, SWR Meter

The XRDS KMR 400 (LMR-400 equivalent) is built for serious distance and performance. At 75 feet, minimizing loss is absolutely vital, and the KMR 400 specification excels here due to its large diameter (0.41 inches) and high-quality conductor. This cable uses robust pl-259 clamp connectors rather than the less reliable crimp types, ensuring maximum conductivity and secure fastening. Designed with a flexible, UV-proof jacket, it promises decades of outdoor service in harsh weather.

Key features that stand out:
– Ultra-low loss performance over 75 feet.
– Uses professional, reliable clamp-style PL-259 connectors.
– UV-proof jacket rated for long-term outdoor exposure.

Pros:
– Excellent signal retention over very long distances.
– Professional build quality and connector security.
– Extremely durable for permanent outdoor antenna runs.

Cons:
– The cable is very stiff and can be difficult to manage around tight corners.

Best for: Permanent, long-run amateur radio installations (HF, VHF, UHF) where signal loss must be minimized at all costs.

Expert Opinion: For long outdoor runs to a serious antenna system, this is the benchmark for performance. The use of clamp connectors is a crucial indicator of quality assembly, ensuring the low-loss properties are maintained right up to the termination point.

MOOKEERF RG8X Coaxial Cable 100ft,Low Loss 50 ohm RG 8X Cable 100 Feet,Black

The RG8X designation places this cable squarely between the highly flexible RG58 and the thick, low-loss KMR400. This MOOKEERF 100-foot spool offers a significant step up from RG58, providing much lower signal loss, making it a great choice for longer runs where the LMR400-style cable might be overkill or too difficult to route. It features a waterproof PVC jacket, making it durable enough for outdoor use, and is often used with cell phone signal boosters or larger HAM setups.

Key features that stand out:
– Excellent balance of low loss and flexibility.
– Low SWR (less than 1.15) for efficient power transfer.
– Waterproof PVC jacket suitable for harsh environments.

Pros:
– Much easier to handle and route than KMR400/LMR400.
– Better low-loss characteristics than standard RG58 over long runs.
– Highly versatile for various 50 Ohm RF systems.

Cons:
– Requires separate connectors; the spool does not come pre-terminated.

Best for: Long-distance runs (up to 100 feet) for cell boosters or antenna installations where cable thickness and flexibility are concerns.

Expert Opinion: RG8X is often the sweet spot for many HAM and CB users. At 100 feet, you need the improved attenuation rate of RG8X over RG58, and this bulk option allows you to cut custom lengths and choose your own connectors.

Bolton400 -LMR®400 Equivalent Coaxial Cable 100ft – Heavy Duty Ultra Low Loss Coax Cable 50ohm – N Male to N Male – 100 feet Black – for Home and Commercial Signal Booster Installation

If your application involves cellular signal boosters, Wi-Fi repeaters, or commercial installations, the Bolton400 is an exceptional ultra low-loss choice. This 100-foot cable is LMR-400 equivalent and specifically features N-Male connectors, which are standard for high-frequency, commercial-grade applications. It is CL3 rated, meaning it can carry up to 300 volts, making it safe and compliant for installation in walls and commercial buildings. With a loss rating of only 6 dB per 100 feet, its signal retention is superb.

Key features that stand out:
– Ultra-low loss rating (6 dB per 100 ft).
– CL3 rated for high voltage commercial applications.
– Features N-Male connectors, standard for commercial RF gear.

Pros:
– Ideal for maximizing cellular signal strength over long distances.
– Patented triple-shielded interior provides superior quality.
– Lifetime technical support is included.

Cons:
– The N-Male connectors may require adapters for standard amateur radio equipment.

Best for: Commercial signal booster installation, high-performance Wi-Fi links, and long professional RF runs.

Expert Opinion: For signal boosters, especially when covering large homes or buildings, the quality of the coax is the most critical factor. The Bolton400’s CL3 rating and exceptionally low attenuation make it a top-tier professional product.

G-PLUG RG8X Coaxial Cable 6FT – 50 Ohm Low-Loss Coax with PL259 Connectors – Pure Copper Core, Dual Shielding, Waterproof PVC Jacket – for CB & HAM Radio, SWR Meter, Antenna Analyzer, RF Applications

For those needing a short, high-quality jumper for their radio shack, the G-PLUG RG8X is built to demanding standards. This 6-foot jumper distinguishes itself by using a pure copper inner conductor, which provides better signal strength and shielding than common copper-clad steel (CCS) conductors. It features dual shielding and a waterproof PVC jacket, ensuring that even this short jumper maintains the highest signal integrity between components like an SWR meter and transceiver.

Key features that stand out:
– Pure copper inner conductor for superior signal quality.
– Dual shielding for maximum interference protection.
– Nickel-plated brass UHF Connectors with gold-plated center pins.

Pros:
– Much better performance than cheaply made jumpers.
– Built tough for both indoor and outdoor short runs.
– Affordable way to ensure high-quality connectivity between radio components.

Cons:
– Only 6 feet, limiting its utility to inter-device connections.

Best for: Short jumpers in radio shacks, connecting transceivers to SWR meters, tuners, or dummy loads.

Expert Opinion: Never cheap out on jumpers! A high-quality jumper like this RG8X prevents signal leakage and noise right at the critical equipment interface, ensuring your transceiver is working efficiently before the signal even hits the main feed line.

Comparison Insights on best low loss coax cable

When deciding on the best low loss coax cable for your needs, the first consideration is the application, which dictates the impedance.

For home entertainment, satellite TV, and digital video, you generally need 75 Ohm cable. The GE and RELIAGINT RG6 cables are excellent choices here. RG6 is thicker and has better low-loss properties than the older RG59 standard, especially at higher frequencies. The RELIAGINT option stands out for its included weather-resistant connectors and adapters, making it versatile for outdoor antenna connections.

For amateur radio (HAM), CB, and cellular systems, you need 50 Ohm cable. The choice here usually boils down to distance and flexibility:

• For maximum performance over long distances (50+ feet): The KMR400/LMR400 equivalents (MOOKEERF 50ft, XRDS 75ft, and Bolton400 100ft) are the clear winners. They are thick but offer dramatically lower signal attenuation than thinner cables.
• For improved flexibility and medium runs (up to 100 feet): RG8X (MOOKEERF 100ft, G-PLUG 6ft) provides a great balance. It’s significantly easier to route than LMR400 but performs much better than standard RG58.
• For extreme flexibility and short/mobile runs: RG58 (YOTENKO 49.2ft) is manageable but you will experience more loss, especially if you exceed 50 feet.

Remember, the quality of the connector and the construction (like the pure copper core in the G-PLUG or the clamp connectors on the XRDS) are just as vital as the cable type in maintaining that crucial low-loss profile.

Final Verdict

Choosing the best low loss coax cable is less about a single winner and more about matching the cable to its job. After reviewing these nine products, here are our top picks across different use categories:

Best All-Around Performer for Radio (Low Loss Champion)

XRDS KMR 400 UHF Coax Cable – 75FT: If signal retention is your primary goal over a long distance, the XRDS KMR 400 is the clear winner. Its ultra-low loss rating and professional clamp connectors ensure that nearly all your transmitted power reaches the antenna, making it ideal for serious radio enthusiasts.

Best Value & Versatility for Home A/V

RELIAGINT 25ft, RG6 White Coaxial Cable: For general home use, this RG6 kit provides outstanding value. The low-loss shielding, weatherproof connectors, and included adapters mean you’re ready for both indoor and exterior antenna/satellite extensions right out of the box.

Best for Flexible Installations

MOOKEERF RG8X Coaxial Cable 100ft: When you need better performance than RG58 but LMR400 is too rigid, the 100-foot spool of RG8X gives you the flexibility to cut custom lengths for longer mid-distance runs, offering excellent low-loss characteristics in a more manageable diameter.

Frequently Asked Questions About best low loss coax cable

What does “low loss” mean in relation to coaxial cable?

“Low loss” refers to a coaxial cable’s ability to minimize signal attenuation, or the loss of signal strength, over a given distance. Signal loss is typically measured in decibels (dB) per 100 feet at a specific frequency. Cables designed for low loss generally have thicker center conductors, better dielectric materials, and superior shielding (like double or triple braiding) compared to standard cables.

Why do some low loss coax cables use N-Male connectors instead of PL259?

N-Male connectors (as seen on the Bolton400) are typically used for high-frequency applications, particularly in commercial, cellular, and Wi-Fi systems above 500 MHz. They offer a more robust, weather-resistant, and impedance-stable connection at these higher frequencies compared to the older PL259 connector, which is often favored in traditional CB and Amateur (HAM) radio below 300 MHz.

What is the primary difference between 50 Ohm and 75 Ohm low loss cable?

The difference lies in their impedance and intended application. 75 Ohm cable (like RG6) is designed for video and data transmission, matching the impedance of typical residential cable systems, modems, and satellite dishes. 50 Ohm cable (like RG58, RG8X, and LMR400) is used for RF (Radio Frequency) communication, matching the impedance of radio transmitters, antennas, and signal boosters. Using the wrong impedance cable can cause significant signal reflection and power loss (high SWR).

Is RG8X or RG58 a better choice for maintaining low signal loss?

RG8X (sometimes called Mini 8) is generally better than RG58 for maintaining low signal loss, especially over longer distances (runs greater than 20 feet). RG8X has a larger diameter center conductor and better dielectric properties than RG58, resulting in less attenuation, though it is still more flexible than the LMR400-style cables.

How does the length of the cable impact the selection of best low loss coax cable?

Cable length is the most critical factor in signal loss. For very short runs (under 10 feet), a high-quality RG58 or RG6 jumper is usually sufficient, as the loss is negligible. For medium to long runs (25 to 100+ feet), you must use heavier, ultra-low loss cables like KMR400 or Bolton400 to prevent significant signal degradation. Longer runs necessitate thicker, higher-grade low-loss cable.

Can I use a low loss coax cable intended for indoor use (like some RG6) outdoors?

It is strongly recommended not to use indoor-rated cable outdoors, even if it is a best low loss coax cable. Indoor cables typically lack the UV-resistant jacketing and robust moisture protection necessary for long-term outdoor exposure. Exposure to sunlight and water will cause the jacket to crack, allowing moisture intrusion that rapidly degrades the cable’s performance and low-loss properties. Always look for UV-proof or outdoor-rated jackets like those found on the KMR400 or RELIAGINT RG6.