KMR400 N Cable 25FT N Male to N Male - Ultra Low Loss Antenna Lead

In this review the KMR400 N cable 25ft is examined for people who need a long, low-loss connection between antennas, routers, or signal boosters. The bottom line: this cable is for anyone running long coaxial runs who wants minimal signal attenuation and a durable outdoor-capable jacket. The reviewer found the single biggest reason to buy is the cable's ultra low loss construction, which preserves signal over distance better than standard coax and makes it a sensible choice for repeaters, 4G/LTE setups, and external antennas.

Key Features

• Ultra Low Loss: The KMR400 construction with aluminum foil and tinned copper braid minimizes attenuation so more signal reaches the far end of a long run.
• Measured Performance: At 1800MHz the reported loss is only 1.52dB over 25ft, which helps maintain stronger reception for cellular and WiFi frequencies.
• Low SWR: A standing wave ratio below 1.15 reduces reflected energy and supports more efficient power transfer at higher frequencies.
• Heavy Duty Jacket: The waterproof PVC outer jacket and adhesive-lined heat shrink at the connector add mechanical strength and weather resistance for outdoor use.
• Professional Termination: N male to N male connectors with a clamped end give a secure connection suited to repeaters, amplifiers, and outdoor antennas.

Who It's For

This cable suits installers, hobbyists, and small businesses that need a 25ft KMR400 coaxial cable for antennas, signal boosters, or router extension where keeping loss low is important. It is particularly useful when runs are exposed to weather or require a robust connector seal.

Those who need very flexible cable for tight bends or indoor-only, ultra-light installations may prefer a thinner, more flexible coax; also, if a different connector type is required the fixed N-to-N termination will not be suitable without adapters.

Pros & Cons

Pros

• Low measured signal loss at cellular frequencies keeps link quality higher on long runs.
• Solid build with waterproof PVC jacket and adhesive-lined heat shrink offers good durability outdoors.
• Low SWR under 1.15 supports efficient transmission and reduces mismatch losses.
• Professionally made N male to N male termination fits common 50-ohm equipment.

Cons

• The cable is relatively stiff, which can make routing in tight spaces more difficult for some users.
• Fixed N-to-N connectors mean adapters are needed for different connector types.

Specifications

Length	25ft
Connector Type	N male to N male
Impedance	50 ohm
Cable Construction	Aluminum foil and tinned copper braid shield
Reported Loss at 1800MHz	1.52dB
SWR	< 1.15
Outer Jacket	Waterproof PVC with adhesive-lined heat shrink

Our Verdict

The KMR400 25ft N male to N male cable is a practical choice for anyone needing a durable, low-loss 50 ohm run between antennas and RF equipment. Its combination of low attenuation, low SWR, and weather-resistant termination makes it good value for installers and hobbyists who prioritize signal preservation over maximum flexibility.

Frequently Asked Questions

Is this cable suitable for outdoor use?
Yes. The waterproof PVC jacket and adhesive-lined heat shrink at the connector provide weather resistance for outdoor installations.

Will this work with my 50 ohm amplifier or repeater?
Yes. The cable is 50 ohm with N male connectors and is compatible with most 50 ohm amplifiers, repeaters, and antennas that accept N male terminations.

How flexible is the cable for routing?
The cable is relatively thick and can be stiff, so it may be harder to route in very tight spaces compared with thinner coax.