Opinion seems to vary between a quarter and a whole wavelength centre-to-centre! I would not go more than half a wavelength.Need a bit of a refresh and confirmation.
If designing a MTM, the Mid/woofs edges of the cones need to be within is it one wavelength of each other to blend and not lobe or is it 1/2 wavelength at the highest crossover point to the Comp driver between them? I also dont remembe if its edge of driver cone to edge of driver cone or center of driver to center of driver measurement.
Sorry I know this is elementary but I just want to ensure Im correct in a project Im moving on.
Thanks again gang
Hi guys. Due to the Covid lock down in our country i was not able to finalize the cabinets till now. Also a proper test i could not yet do.
As you can see i build 2 cabinets with fully intergraded pascal xpro-2 amp (i bought this amp before i chanched over to the DCX464 otherwise it would be the xpro-3)and an additional dsp sound board with FIR filtering. Analog input and AES . I extend the cabinet at the back with 35mm to fit in all stuff.View attachment 209387
The speakers are B&C 12NDL76 16 ohm each and put these paralel to each other. I chose 16ohm to use the maximum power of the amp into the speakers and as you can see at the pictures i have made at the back side a speakon output for second slave cabinet. (to build in the futhure)
The B&C dcx464 i made a passive crossover at 4000hz. The exact weight of the cabinet is at the moment 38.89kg. This is pretty heavy but not as bad as i thought it will be.
Hahahah David thanks for the warning. It is acutally a doll witch my dogs play with.Dude do you have a huge snake in your backyard?
A couple of comments ...
The quick sim I did indicates the 12NDH-4 would be one of the best choices you can get for the PM90/60.
If you use the XT1464 horn in the standard configuration only BMS driver will fit. (also check that the 4594 will still fit with the 12NDH-4).
B&C DCX464 /HF950 will fit I think, but check. Also the 464 with the PR614 may fit - but check I have not tried it.
I think the Ciare PR614 is possibly a better horn than the XT1464 ... BUT ... the XT1464 is bigger and goes lower which is an advantage in the PM60.
The difference between the PMA60 and the PM60 is the mids (100 - 700Hz} have a 5-6 dB output advantage.