@ kkkittehz - I'll do a gloss black with an acrylic top coat.
Some of the problems of the speaker are becoming more clear. Vocals sound a little nasal and an investigation reveals why ...
These measurements are taken at discrete frequency points using an SPL meter. Values are then plotted in Excel. First graph shows the SPL vs Frequency of the right speaker taken at 0.5m distance.
Attachment:
Freq vs SPL of right speaker at 0.5m.jpg
The second graph shows the response of the tweeter via the 24dB LR4 crossover at 1500Hz.
Perfect 24dB/oct acoustic rolloff !
Attachment:
Tweeter freq response with 24dB-oct filter in place.jpg
Third image is the crossover schematic. Both drivers are wired in phase ( as they should be in an LR-4 crossover with 360deg of phase shift).
Attachment:
4th Order L-R @ 1500Hz.jpg
Notes :
I used a 0.68mH inductor for the woofer's network and maybe that could be the reason for the dip.
A 0.55mH is required for the correct response. Need to go get a 0.55mH to do more testing...
Looks like components need to be of tight tolerances in a 4th order design. No measurements have been made yet for the tweeter with out of phase wiring nor have I measured the response of the woofers alone. The tweeter's response starts rolling off gently at 7Khz due to limitations in the soundcard. Front baffle is 12'' wide and it shows in the measurements that the baffle step transition is at 450Hz.
Any suggestions as to how to get rid of that horrible dip at 1750 Hz ? This is worst BBC dip ever seen LOL.
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