A:Answer A stereo receiver bundles an AM/FM tuner, amplifier, and various stereo inputs. Some also include a preamp. A preamp is a mini amplifier, and usually features an equalizer. A separate preamp is usually only necessary when using a phonograph (record player). This is because a phonograph usually has a sound output of around 2 milliwatts, but most amplifiers and receivers expect it to be around 200 milliwatts. The preamp bridges the gap, however some receivers such as the Insignia NS-R2001, have a phono input, and therefore do not require a separate preamp. (I don't recommend this receiver, because it is of overall low quality.) I might also suggest that you avoid PylePro products like the plague; they are very low quality, and anything but "Pro". I'd also throw Pyramid (owned by Pyle) and Sherwood products in the same category.
