Hi, i wanted to know if there is a good program to simulate frequency responce off multiple drivers ( MTM design horizontal ) and lobing. the reason is because i want a simular responce from all angles wich can't be done perfectly but i'm curious how close i can come! i was thinking about the Kartesian 4 inch driver with a dayton nd28 tweeter crossed over at 2200hz ( the lowest the tweeter can go ). So with a MTM design the center to center off the 4 inch drivers will be 17,6 cm so after 500hz lobing will occur in a certain degree and i want to know if i can calculate this. if it's all the same at every angle i can simply adjust the frequency responce with dsp.
i also can build a standing( vertical ) MTM to solve the problem and with this design i could put the passive radiators on the sides instead of side and back to cancel internal resonances? or at least the uncontrolled vibration off the speaker because off the weight of the passives trowing in different directions...BUT i don't like the standing MTM design ( it looks cheaper to me, as a portable speaker). i also can make a 3 way design like more expensive MTM to solve the lobing issues and even acting like a 1 point source speaker but this will be more difficult and would make the speaker larger.
does someone have tips or suggestions for me, thanks!!
i also can build a standing( vertical ) MTM to solve the problem and with this design i could put the passive radiators on the sides instead of side and back to cancel internal resonances? or at least the uncontrolled vibration off the speaker because off the weight of the passives trowing in different directions...BUT i don't like the standing MTM design ( it looks cheaper to me, as a portable speaker). i also can make a 3 way design like more expensive MTM to solve the lobing issues and even acting like a 1 point source speaker but this will be more difficult and would make the speaker larger.
does someone have tips or suggestions for me, thanks!!
VituixCAD can certainly do your dispersion/lobing simulations for you.
Generally, Passive Radiators work over a fairly narrow frequency range at the bottom of the spectrum, so I don't know if they would have much effect on internal resonances.
Generally, Passive Radiators work over a fairly narrow frequency range at the bottom of the spectrum, so I don't know if they would have much effect on internal resonances.
thanks for the tip, i will download it and look into it. i have made a small speaker once ( flat like a bose soundlink ) and the vibration of the enclosure makes so much noise that it was like a 100hz sinewave that was playing in the background but really flat enclosures seems to have this ( cabinet resonance ). the enclosure i used was about 3 liters and with 12 mm mdf AND bracing but still vibrating like crazy. without rubber feets it walked true the room 🙂
