Digital Pre-AmplifierIn addition to processing and manipulation of audio signals, digital preamps may also include inputs for different types of digital audio sources, such as USB, optical, and coaxial.FilterBrands All brands NAD 1 ProductShow:12243672VanTotSort by:Sort byDefaultMost viewedNewest ProductsLowest priceHighest priceName ascendingName descendingAdd to cartLogin for wishlistNAD PP4 Digital Phono/USB Preamplifier$279.00