Yes, u really need a preamp and a good microphone. Today, there are a lot of cheap condenser microphones on the market.
This type of microphone usually needs to be feed with phantom-power(+48 volt), but most preamps, also the very cheap ones can do that.
About equalization, it is common that a male voice needs to be cut a bit in the lower frequencies and boosted in the upper mid.
u can also a apply some reverb, that will make your voice fit better with the music.
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Bob at: Audio Player Informer