audio research phono preamplifiers

phono pre·am·pli·fi·er (phno pr-mpl-fr)

Turntable pick-up cartridges output signals at much lower levels than other sources. The phono preamplifier increases the phono signal to a higher level. Records are encoded and need to be decoded. This pre and de-alteration of the signal is done according to a standard called the RIAA (Record Industry Association of America) curve.