I have a pair of tympani iva's which I had planned to use in the new house. It seems though that even in the large main room of the house, they are a bit overwhelming to some...So I am considering using just the mid/tweeter panel, using an ob dipole servo sub (gr research/rhythmic) for the lows. Not sure where the tympani's cross over to the mid panel. Anyone know if this is feasible? If not, any suggestions?
Thanks!
Thanks!
Probably not a good idea. According to images of their X-over schematic the bass panel is lo-passed at 850Hz @ 18dB/octave. The mid panel is band passed from 400Hz to 2000Hz @ 12dB/octave. The tweeters are hi-passed at 2700Hz @ 12dB/octave.
Any drivers that could handle the low end, say from 25hz to 350-400hz? I thinking about replacing the tympani mid with a neo-8 array which can get down to the 350-400hz area. Thanks!
If you're still talking about dipole woofers, the issue you're likely to run into is the trade-off between low-end extension/sensitivity and the primary dipole peak/null that happens at higher frequencies. If you use a larger baffle (to decrease the amount of equalization and excursion required) that will put response anomalies in the region where you still want to use the woofer. Example at link here:
Electro-acoustic models
You can decrease the baffle size, but then you need more excursion to handle the equalization required to fix the dipole roll-off (which can get extreme at very low frequencies).
The frequency range you want to cover isn't much of a problem for many woofers, but doing it dipole is a lot harder. There are many details and trade-offs to do them well, and you often need multiple high-excursion drivers to get the bottom octave. Dipole bass is also different than what most people are used to, and some find it unsatisfying or impractical even when done well.
I don't mean to sound discouraging, but given your stated goals I'm not sure if dipole is the way to go.
Electro-acoustic models
You can decrease the baffle size, but then you need more excursion to handle the equalization required to fix the dipole roll-off (which can get extreme at very low frequencies).
The frequency range you want to cover isn't much of a problem for many woofers, but doing it dipole is a lot harder. There are many details and trade-offs to do them well, and you often need multiple high-excursion drivers to get the bottom octave. Dipole bass is also different than what most people are used to, and some find it unsatisfying or impractical even when done well.
I don't mean to sound discouraging, but given your stated goals I'm not sure if dipole is the way to go.