A Digital to Analog Converter, or DAC, takes your digital content and transforms it into analog so that your hifi system can amplify it and play it through your speakers. If you think you already have DACs in your system, you would be correct. So, if you already have DACs, why would you need an external one? More to the point, could you actually use it and would it make a difference? We walk you through the reasons you might need an external DAC and what problems you can expect it to fix. Read DACs: Do You Need an External Digital to Analog Converter for your Hifi System? Are you running an external DAC in your system? Tell us which one and why you decided to add it and how it sounds.