Mogami W2524Bulk Guitar Cables: High Impedance Transmission Cables. Most musical instrument sound pick-ups, for example those in electric guitars, are comprised of high impedance circuits driven mainly by voltage, with very little electrical current flow. Microphonic noise is caused by the minute voltage generated when a cable is flexed, stepped on, etc. Guitar cables must be designed to prevent this, so a conductive PVC layer is placed under the shield conductor to drain away this voltage.Note: This conductive layer must be stripped back when wiring, or a partial short will result. 100m (328Ft) / 200m (656Ft). Weight per 100m (328Ft) roll. The item "Mogami W2524 Bulk Guitar Cables High Impedance Transmission 328 Foot Spool" is in sale since Monday, September 28, 2015. This item is in the category "Musical Instruments & Gear\Guitars & Basses\Parts & Accessories\Cables". The seller is "tsigearguy" and is located in Nashville, Tennessee. This item can be shipped worldwide.