KMR400 N Cable 150FT N Male to N Male Ultra Low Loss - Long Run Coax

Our review of the KMR400 N Cable 150ft N male to N male finds it best suited for anyone needing a long, low-loss coax run for outdoor antennas, signal boosters, or 4G LTE setups. The single biggest reason to buy is its combination of ultra low loss performance and durable construction that keeps signal degradation to a minimum over long distances while standing up to outdoor exposure. For installers and hobbyists who need a reliable 150 ft extension with professional N male terminations, this cable delivers predictable RF behavior with robust shielding.

Key Features

• Length and use: A full 150 ft run provides ample reach for antenna placement, repeater installs, and remote receivers without needing additional joins.
• Ultra low loss: The KMR400 construction is engineered to reduce signal attenuation over long distances, which helps preserve signal strength for antennas and boosters.
• Premium conductor and shielding: Copper clad aluminum inner conductor with aluminum foil and tinned copper braid offers more than 95% shield performance to resist EMI and RFI.
• Weather-ready jacket: The waterproof and flexible PVC outer jacket allows the cable to be used outdoors in exposed installations without rapid degradation.
• Reinforced connector join: An upgraded 2.2' heat shrink tube at the N male joins improves connector retention and reduces the chance of separation at the end points.
• Professional build quality: Manufactured to RF cable standards intended for reliable, repeatable performance in antennas and signal boosting systems.

Who It's For

The cable is ideal for amateur radio operators, installers of GMRS or 4G LTE repeaters, and homeowners or small businesses adding outdoor antennas or signal boosters where a long, low-loss run is required. Its 150 ft length and durable jacket make it a sensible choice for mounting antennas away from living areas or equipment cabinets.

Those who need ultra-flexible or lightweight patch leads for tight indoor routing should look elsewhere; the KMR400 is optimised for shielding and low loss rather than ultra-soft flexibility, and some users note a stiffer feel which can make tight bends harder to manage.

Pros & Cons

Pros

• Strong shielding and low signal attenuation preserve RF performance on long runs.
• Robust, weather-resistant PVC jacket that tolerates outdoor exposure.
• Solid build quality and upgraded heat shrink for a more secure connector join.
• Good value for a 150 ft low-loss coaxial length compared with specialty low-loss options.

Cons

• Some users report the cable is relatively stiff, which can complicate routing in tight spaces.
• Not the lightest option for applications where minimal weight or extreme flexibility is required.

Specifications

Length	150 ft
Connector type	N male to N male
Impedance	50 ohm
Inner conductor	Copper clad aluminum
Outer conductor	Aluminum foil and tinned copper braid
Jacket	Waterproof flexible PVC
Shielding	More than 95%

Our Verdict

The KMR400 150 ft N male to N male coax is a practical choice for anyone needing a long, low-loss outdoor cable run for antennas, repeaters, or boosters. It balances durable construction and effective shielding with good value, making it well suited to installers and hobbyists who prioritize signal preservation over extreme flexibility.

Frequently Asked Questions

Is this cable suitable for outdoor antenna runs?
Yes. The waterproof PVC jacket and high shielding make it appropriate for outdoor installations and exposed routing.

Will this cable significantly reduce my signal?
No. The KMR400 design emphasizes ultra low loss to minimize attenuation over the 150 ft length, preserving signal for boosters and antennas.

Are the connectors secure for long-term use?
Yes. The upgraded 2.2' heat shrink at the connector junction improves retention and helps prevent the connector from separating under normal outdoor conditions.