MOD UPDATE: Fostex Small Driver Measurements Fostex FE126En http://www.superbestaudiofriends.or...measurements-and-related-diy.2976/#post-85124 Fostex FE108EZ http://www.superbestaudiofriends.or...measurements-and-related-diy.2976/#post-85502 Wasn't my plan, but seems like the thread went into the DIY direction. That would be fantastic. I've been wanting to buy Beta 15s and use some weird 1970s East German "full range" drivers that are in a 2-way bookshelf speaker that I have to make a 2-way OB speaker (just for kicks). Those drivers are too bright for me on-axis and off-axis they have too much roll-off above 10kHz for me, so I thought something cheap like the 3 or 4" Fostex drivers could be perfect and wouldn't be too expensive to just try it out. I could try to design a filter for the drivers I have and it would probably work, but I figure if Gaurav uses the Blumensteins, the 3" Fostex driver must really be something special. The Sigmas are too expensive to just try something dumb for me right now and at that point I would rather save up for something better. I can always repurpose the Fostex driver later on, or give it to a friend or so. For this purpose a smooth response and good treble extension is actually more important than utmost clarity and resolution for me.