jb90

I'm happy using my homebuilt cabs with Beta 12As and no tweeter.  They have quite a bright sounding upper mid response even if they don't go very high. 

I have no tweeters anymore. I used to think that having extended frequency response was desirable because... you can always remove it if you don't want it, right? But I found that quite often the tweeter just added harshness too easily. The best one I had personal experience of was the Barefaced BigBaby 2 (single 12", but they make a 2x12 version too). The attenuation control worked very well and even full on was not harsh. So there are some cabs out there that work well. But in the end I found I just don't need to go that high. My main cabs roll off at 7 KHz and they have plenty top end that still doesn't get fizzy if I add overdrive.

So, no, I don't think you need tweeters. Of course, some people love them so it depends on what you're after, but for what it's worth I am not into dark 'old school' sounds. I like versatility, mix fingerstyle/pick/slap and can go quite bright at times, and I can get all that without tweeters. 

Thanks for reply guys. I order with tweeter. I think that 2x12 have not so wide freq response to give good full of charmonics sound. 5khz+ is probably ok but 3.8khz might be not enough.