DIY Audio Projects Forum

Hi im new and i would like to now how what speakers should i buy to build a 6 ohm hifi speaker

I am going to be somewhat heretical here - I advise you to look on the legacy (a kind word for 'used') market and audition as many speakers as you can find that appeal to you. Then purchase at least one example and deconstruct it into its components. Then, experiment with these components until you understand how they all work together and how your changes affect the whole.

This will teach you a great deal about how speakers work and how specific components, drivers and crossovers work together and/or separately.

Otherwise, there are as many different speaker options as hairs on a large dog, and within the universe of 6-ohm options, at least as many as on a small dog (today is National Dog Day). So advising you to one direction over another is silly without a lot more knowledge of your needs and style.

why specifically 6 ohms?
most decent quality stable amps can drive any impedance from 4 ohms (some as low as 2 ohm) on up to infinity with the obvious decline in output (depending on relative efficiency)