The EN-3000 give you a fixed 18dB/octave slope, the EN-30290 is switchable between 12 and 18dB/octave.
For a DIY speaker project, a pioneer D23 is more flexible with select-able 6, 12 and 18dB/octave slope.
http://www.thevintageknob.org/pioneer-D-23.html
For a DIY speaker project, a pioneer D23 is more flexible with select-able 6, 12 and 18dB/octave slope.
http://www.thevintageknob.org/pioneer-D-23.html