Check the listing for details. Speaker Level to RCA Line Output Car Radio Audio Signal Converter Power Amp RCA. Condition: New. Listed at 12.79 USD. The Music MastersDiscount Electronics & MORE! You are looking at... Item: Speaker Level to RCA Line Output Car Radio Audio Signal Converter Power Amp RCA Adapter Condition: New Factory Specifications: Normal 0 false false false MicrosoftInternetExplorer4 Comments: This is an excellent low-cost accessory when you want to upgrade your factory radio and add an amp and/or speaker box/subs. Compared to other options it's one of the best priced units that actually works. If you don't want to replace your radio this easily connects to your factory radio speaker wires and gives you a set of RCA jacks so you can correctly hook up a power amplifier. We use these in the shop with excellent results. The important thing to remember is that you get the polarity correct (+/-) when connecting to your factory system. Color codes vary greatly among vehicle wiring so it's important you get this right for a successful installation. If this doesn't work to your expectations we will pay for return shipping so you have nothing to lose! Thanks for checking out one of our items! Please take the time to look at everything we have up for sale and check back often. You never know what you will find. We always guarantee your satisfaction and promptly take care of our customers. Shipping & Handling for this item is FREE in the everywhere in the United States. For international shipping not listed contact us for approval and a shipping quote before making your purchase. Thanks again for looking and as always your business is appreciated!