Monoprice™ Access Series CL3 In-Wall Rated Pure Bare Copper Speaker Wire Two or Four Conductors, 250 Foot Length Get the most out of your home audio system with high quality pure bare copper speaker wire from Monoprice™! The speaker wire features two or four conductors made of high purity (greater than 99.95% pure) bare copper. Pure Bare Copper is a superior conductor to the copper clad aluminum (CCA) that is used in many other inexpensive speaker wire. CCA is only about 68% as conductive as pure bare copper and the additional resistance is added to the impedance of the speakers which can negatively effect the sound. For the wire to have no audible effect, the total wire resistance should be no more than 5% of the lowest impedance of your speakers. Even speakers rated for a nominal 8-ohms, may dip to as low as 4-ohms at some frequencies, which further reduces the total cable resistance allowed in the wire. Using Pure Bare Copper speaker wire ensures that the total load put on the amplifier remains as close as possible to the impedance curve of your speakers. Each conductor in the speaker wire is jacketed with color-coded PVC for easy polarity identification. The CL3 rating indicates that the cable complies with fire safety and insurance requirements, making it safe for use inside the walls of residential class buildings. Pure bare copper conductors Superior conductor to the Copper Clad Aluminum (CCA) Color-coded PVC for easy polarity identification CL3 In-wall rating complies with fire safety and insurance requirements 250 continuous feet of speaker wire on a spool   PURE BARE COPPER Pure Bare Copper is a superior conductor to the copper clad aluminum (CCA) conductors used in many other inexpensive speaker wires. CCA is only about 68% as conductive as pure bare copper; its additional resistance adds to the impedance of a speaker, negatively affecting its sound.   CL3 IN-WALL RATED The CL3 rating indicates the cable’s compliance with fire safety and insurance requirements. It is safe for use inside the walls of residential class buildings.    .gte-ctr .row{margin:0;} Lifetime Warranty With Monoprice's Lifetime Warranty, you can rest assured we stand behind our products and our customers. Additionally, we offer a 30 day money back guarantee as well! If the product you purchase does not satisfy your needs, send it back for a full refund. 30 Day Money Back Guarantee Monoprice™ stands behind every product we sell with a 30 day money back guarantee! If the product you purchase does not satisfy your needs, send it back for a full refund. Quality at a Fair Price Monoprice's rugged design and rigid quality control standards deliver high quality products at fair prices. Hassle Free Packaging Monoprice exists to bring simplicity, fairness, and confidence to technology choices. This product features recyclable packaging that is simple to open, cost effective, with minimal waste, and fully protective as it travels to you. Service and Support You're never on your own with Monoprice products! We have a full team of friendly and knowledgeable technicians available to answer your questions, both before and after the sale. Contact our technical support team for questions about our products, troubleshooting, or even suggestions for products to fit your particular needs. Not to be outdone, our friendly and helpful customer service team is here to make your ordering, delivery, and any possible returns a quick and painless operation, from start to finish!   Support Files: Diagram (Aug 16, 2022) Monoprice™ and all Monoprice logos are trademarks of Monoprice Inc. Updated Feb 8, 2023 Warning: This product may contain a chemical known to the State of California to cause cancer, birth defects, or other reproductive harm. For more information, go to www.P65Warnings.ca.gov