The C53 Preamplifier is ready to serve in your home audio system for many years – even decades – all while delivering unmatched audio quality. Following the digital audio precedent set in our current solid state integrated amplifiers, the C53 stereo preamplifier features an upgradeable digital audio module. But unlike our integrated amplifiers that use our DA1 Digital Audio Module, the C53 is the first to use our new, more advanced DA2 Digital Audio Module.