One of the reasons I like my source:
" In addition to the 8200CD, the 8200CDQ adds full preamp functionality whilst maintaining the same chassis size as the 8200CD. The existing digital inputs are joined by three line-level analogue inputs, providing source selection and volume control in the analogue domain. The preamplifier section is fully balanced and all analogue input signals are converted to balanced form, helping to reduce distortion and noise. Class A gain structures are present throughout, and users may choose between preamplification in the analogue or digital domain in respect of the digital inputs. In addition, the 8200CDQ adds a direct-coupled, discrete, Class A headphone amplifier, accessible via a socket on the front panel."