An integrated amplifier that includes a preamplifier as well as a power amp in one box is called an AV receiver. It is also known as a receiver. It could be called an amplifier. A receiver can be described as an integrated amplifier and a tuner that receives AM/FM radio signal. Technically speaking, an AV amplifier should not be used if it doesn't include a tuner. An AV receiver can be used, but it is still a common term.