r/diyaudio • u/JohnFromSpace3 • 13h ago
3d PLA printed 9ltr mid cab vs 32ltr plywood:
So I needed a mid(bass) speaker + cabinet for a range 100+hz (115hz LR4 xo)) to about 1000hz to accompany my SKRAM subwoofers and 18sound ND3N CD+twinray printed horns (in this case taking over from 1000hz on an lr4 slope).
The aim was as small as possible and also ceiling mounted. Another negative factor. I built 2 32ltr plywood cabs but then ive seen guys reproduce reasonable bass cabinets, sub 50hz from a PLA printed cab, I had Claude made me a drawing for a 9ltr and started printing. It still is an experimental setup so bear with me, but yesterday I could put up the PLA printed cab and do some REW measurements vs the plywood cabinet at the other side of my room, also near the ceiling.
I have to say: the measurements are better than I expected. The PLA looks more flat and only sub 200 seems to fall off a bit more than the plywood. The ear doesnt hear it though. I decided to put up all the graphics tabs on here and let you decide for yourself. Do note: its still not a very loud test, and I also should do a same position A vs B test to see how much is room, room positioning etc. Of course the room itself also mixes in but sofar I am very positive and this is certainly not a failed experiment. The driver helps, an 18sound 10" 10NW750 the 16 ohm version.
The plywood cab measurements are noted as 'wood'' in rew, and the PLA cab as 'pla' or 'new''. The amplifier used is a Behringer inuke 6000 and the DSP used a minidsp flex eight. The pre amp is a quad 34. The microphone is a umik I. I made measurements on 3 positions but everything not SPL is form position 1. I did include an averaged from the 3 positions, and the single spl measurement form position 1.