SKU: 56718420250

Monoprice Nimbus Series 18AWG 2-Conductor CMP-Rated Speaker Wire, 500ft

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Description

Monoprice Nimbus Series 18AWG 2-Conductor CMP-Rated Speaker Wire, 500ftThe Monoprice Nimbus Series 18AWG 2 Conductor CMP Rated Speaker Wire is engineered for safety, reliability, and superior audio performance in both residential and commercial settings. Featuring a fire retardant CMP rated jacket that has been tested by Underwriters Laboratories, this wire is designed to meet stringent plenum space requirements, making it an ideal choice for installations in air handling spaces such as ceilings, walls, and drop soffits.

The Monoprice Nimbus Series 18AWG 2-Conductor CMP-Rated Speaker Wire is engineered for safety, reliability, and superior audio performance in both residential and commercial settings. Featuring a fire-retardant CMP-rated jacket that has been tested by Underwriters Laboratories, this wire is designed to meet stringent plenum space requirements, making it an ideal choice for installations in air-handling spaces such as ceilings, walls, and drop soffits. Whether you’re wiring a home theater, distributed audio system, or commercial PA setup, Nimbus Cable delivers clear signal transmission with the durability needed for long runs and demanding environments.

  • Safety-first construction for plenum spaces: The CMP-rated jacket is specifically designed for air handling spaces, ensuring compliance with building codes in both residential and commercial environments. UL-tested jacket provides peace of mind that your wiring remains flame-retardant and safe in demanding plenums.
  • Optimized 18 AWG, 2-conductor design: The 18-gauge, two-conductor setup offers a balanced blend of flexibility and low resistance, supporting efficient, high-quality audio signal transfer across typical speaker distances. This configuration is ideal for most standard speakers, in-ceiling or in-wall installations, and multi-room audio projects.
  • Durable, flexible construction for easy installation: Nimbus Series wires are designed to bend and route through walls, conduits, and tight spaces with minimal effort. The fire-retardant jacket protects conductors from abrasion and environmental exposure, helping ensure long-term reliability in challenging installation environments.
  • Perfect for residential and commercial applications: Whether upgrading a home theater or outfitting a conference room with a clean, code-compliant wiring solution, Nimbus 18AWG wire supports a wide range of audio systems. Its plenum-rated jacket makes it suitable for ceiling channels, dropped ceilings, and other air-space routes commonly found in both homes and offices.
  • Bulk length for contractors and installers: Supplied in a generous 500-foot spool, Nimbus wire reduces the need for frequent reorders and minimizes waste on large projects. The bulk length is ideal for professional installers who value efficiency and consistent performance across long cable runs.

Technical Details of Monoprice Nimbus Series 18AWG 2-Conductor CMP-Rated Speaker Wire, 500ft

  • Conductor gauge: 18 AWG
  • Conductors: 2-conductor configuration
  • Jacket material: CMP-rated fire-retardant jacket designed for plenum spaces
  • Safety and compliance: UL-tested jacket with CMP plenum air-space safety rating
  • Length per spool: 500 feet
  • Applications: Ideal for residential and commercial speaker wiring, suitable for in-wall, in-ceiling, and other air-handling space installations
  • Performance notes: Built for reliable audio signal transmission with durable construction and resistance to abrasion during installation

How to install Monoprice Nimbus Series 18AWG 2-Conductor CMP-Rated Speaker Wire

Installing Nimbus CMP-rated speaker wire is straightforward for any competent installer or DIY enthusiast. Follow these best practices to ensure safe, code-compliant, and high-performance results:

1) Plan your run: Assess the path from your amplifier or receiver to the speaker location. Identify crossings, conduits, and any potential sources of interference or damage. Measure accurately and add extra length for potential reroutes or adjustments.

2) Maintain plenum compliance: If routing through air-handling spaces, ensure the jacket remains intact and avoids sharp edges, excessive bends, or contact with hot surfaces. Keep the cable a reasonable distance from other electrical lines to minimize cross-talk and interference.

3) Prepare the wire ends: Use proper wire strippers to remove a small portion of insulation from each conductor—enough to expose clean copper without nicking strands. Avoid frayed or nicked conductors, which can impact signal quality and reliability.

4) Make connections securely: Attach conductors to your speakers and to the amplifier/receiver terminals using the appropriate speaker wire bindings, clamps, or connectors. Ensure a solid, corrosion-free connection and observe correct polarity (positive to positive, negative to negative) to preserve phase and imaging.

5) Manage routing and protection: Route the wire neatly with cable clips or staples, keeping the cable away from heat sources and sharp edges. Use grommets or bushings where entering walls or enclosures to prevent jacket damage. Maintain proper bend radii to avoid kinking and ensure long-term durability.

6) Test before finalizing: Power on the audio system and test each speaker to confirm clear signal transmission and proper phase. If you notice any distortion or intermittent sound, inspect the wiring for loose connections, damaged jackets, or pinched conductors and correct as needed.

7) Label and document: For professional installations, label runs at both ends and maintain a simple diagram of your speaker wiring. This practice simplifies future maintenance, upgrades, or troubleshooting.

8) Safety first: If you’re working in occupied ceilings or walls, follow local electrical codes and safety guidelines. Do not attempt to modify or splice the jacket beyond the standard end-terminals and connectors designed for CMP-rated speaker wire.

Frequently asked questions

  • Q: Is this wire CMP-rated and UL-listed for plenum spaces?
  • A: Yes. The Nimbus Series uses a CMP-rated jacket designed for plenum air spaces and has UL testing indicating compliance with fire-retardant safety standards for such environments.
  • Q: What size conductor is used in this cable?
  • A: The cable uses 18 AWG conductors in a 2-conductor configuration, suitable for typical home theater and small-to-medium professional audio installations.
  • Q: How much cable comes on a spool?
  • A: Each spool provides 500 feet of cable, offering ample length for larger projects and minimizing the need for frequent reorders.
  • Q: Can this wire be used in-wall or in-ceiling installations?
  • A: Yes. The CMP-rated jacket is specifically designed for use in air-handling spaces, making it appropriate for in-wall and in-ceiling installations where plenum-rated wiring is required.
  • Q: Is the wire suitable for outdoor use?
  • A: Nimbus CMP-rated speaker wire is intended for indoor applications, particularly where plenum ratings are required. For outdoor or weather-exposed installations, consider weather-rated or conduit-protected options.
Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 56718420250

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Chris S
San Leandro, US
★★★★★ 5
Great tart candy for dry mouth!
Flavor Name: Tart Cherry, Size: 3.85 Ounce (Pack of 1)
These are delicious tart cherry candies that help combat dry mouth. They are sugar free and individually wrapped so it’s easy to carry a few around in your pocket or purse.
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Reviewed in the United States on December 14, 2025
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Tonya Denning
Boise, US
★★★★★ 5
These work well
Flavor Name: Tart Cherry, Size: 3.85 Ounce (Pack of 1)
These are a nice alternative to lemon drops. They are a little sour/tart but that’s the point. They taste just like a regular hard piece of candy, without the sugar. They do help my dry mouth and I will purchase them again!
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Reviewed in the United States on November 26, 2025
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Weaver
Port Orchard, US
★★★★★ 4
Flavor is pretty good, but could be better
Flavor Name: Tart Cherry, Size: 3.85 Ounce (Pack of 1)
In trying to find a keto candy WITHOUT maltitol, this one is a pretty good one. It’s a great blend of tart and sweet, but I just wish the cherry flavor was more concentrated. The flavor is good- just a little dull. I’ll still rebuy them because they help satisfy my cravings, keep me keto, and don’t give me any stomach issues.
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Reviewed in the United States on October 12, 2023
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Shirley Douglas
New York, US
★★★★★ 3
Horrible taste.
Flavor Name: Tart Cherry, Size: 3.85 Ounce (Pack of 1)
Medicinal taste.
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Reviewed in the United States on April 3, 2026
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Lesia Phillips
Birmingham, US
★★★★★ 5
Great to keep in purse for when I have a dry mouth.
Flavor Name: Tart Cherry, Size: 3.85 Ounce (Pack of 1)
I suffer from dry mouth due to diabetes, and these help when I’m somewhere I can’t get to a water bottle quick enough.
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Reviewed in the United States on April 4, 2026

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