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I've read a lot about this throwing effect and many say it is just a matter of spl. If one sub is louder, it will throw the sound longer.
Cubo15 wrote: @Grymer: If it's primarily for outside, you need throw beyond 30 meters and that throw isn't going to disturb neighbours at a couple km/ miles away, plus you're always going to use a stack of 4, I would choose the MHB's.
If you're going to do small and large setups in-and outside, within 30 meters distance, wanna do cardioid or some pattern control setup, I would go for the Cubo 15's. Also the Cubo's are a one man lift, so it's quite flexible.
If the MHB are loaded with decent 18" drivers, I don't think there will be much difference in overall output.
Cubo15 wrote: @Grymer: I'd say 'throw' is more complicated then that but it's hardly an issue here.
If it's for a 12V PA I would change things a bit, I would focus less on anything below 50 Hz and focus more on output till well in the 120 Hz area. Below 50 Hz is the deep bass but also the early depletion of your batteries, around 120 Hz is where you feel the kick on your chest, which will give your 12V PA reasonably easy achieved grunt.
In that case, since you already have the DR250, I would look into the T39 (or was it the T48) loaded with a 12" (3012LF). Not much below 50 Hz, nice output in the 120 Hz area and if made from 12 mm ply, still a one-man-lift (bit big though).
One-on-one a Cubo 15 will start to beat it below 60 Hz but to do great in the 120 Hz area you would either need the right driver/EQ or Cubo Kick 15. The MHB could also work but I have never heard it and every design I heard the 18LW1400 in, personally I didn't like above 80 - 100 Hz. The latter being a sub driver and for your purpose I would look into a bass driver, unless it's for Cubo 18 or Sub as those are generally used below 100 Hz anyway.
@Ricosound: Technically it would have the 2.66 Ohm impedance (=8/3), so probably around a 1000 W for all three, which means it would definitely be safe with a 40 Hz high pass.
Best regards Cubo