Other then the right tools to make the enclosure you also should have at least an RTA. Making a balanced speaker strictly using your ears is more then difficult even for the very experienced.
You should also keep in mind that buying expensive drivers does not mean there freq. resp. will be exactly the same, typically the will not. When I worked for Legacy Audio, we used a very expensive Eton midrange driver and out of a pallet of drivers there was usually 20-25% that we couldn't use because there freq. resp. was too far out. My understanding is that John Dunlavy rejection rate was above 50%.
Also if you are going spend $400 on tweeters you don't want to lash them to a cheap crossover. You can computer model a crossover to get pretty close to the crossover component values you will need but you will need to fine tune the crossover which will mean a selection of component values which mean $$$$ if you use anything of decent quality.
I am not saying that you cant make something that sounds decent but that does not appear to be what you are going for. Sounding decent IMO is a long way from really good/great which take a lot of time/money/effort. Much more so in my experience then buying something well engineered used ie Revel, Dynaudio, B&W
You should also keep in mind that buying expensive drivers does not mean there freq. resp. will be exactly the same, typically the will not. When I worked for Legacy Audio, we used a very expensive Eton midrange driver and out of a pallet of drivers there was usually 20-25% that we couldn't use because there freq. resp. was too far out. My understanding is that John Dunlavy rejection rate was above 50%.
Also if you are going spend $400 on tweeters you don't want to lash them to a cheap crossover. You can computer model a crossover to get pretty close to the crossover component values you will need but you will need to fine tune the crossover which will mean a selection of component values which mean $$$$ if you use anything of decent quality.
I am not saying that you cant make something that sounds decent but that does not appear to be what you are going for. Sounding decent IMO is a long way from really good/great which take a lot of time/money/effort. Much more so in my experience then buying something well engineered used ie Revel, Dynaudio, B&W