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To find out if your receiver has preamps, you would need to consult the receiver’s user manual or technical specifications provided by the manufacturer. The presence of preamps is not typically something that can be determined just by looking at the receiver.

A preamp (pre amplifier) is a component that amplifies an electrical signal to a level that is loud enough to drive a loudspeaker. It usually comes before the power amplifier in a sound system. If the receiver has preamps, it will likely be mentioned in the manual or specifications. If you don’t have the manual, you might be able to find it online by searching for the model number of your receiver.