Hey all,
I'm looking to build a high efficiency two way. I'm planning on using the DDS ENG 1-90 Pro waveguide. The compression driver is probably going to be the Radian 465pb, but that could change. The Radian 475pb, the BMS 4550, the Beyma CP-380M, and the Peavey RX22 are also considerable. I can't find a woofer to match that looks right to me. I'd like these things:
1) Efficiency >94db
2) Driver w/ 3"-4" voice coil for low power compression
3) Relatively cheap, like <$400US, which I think would leave out TAD and PHL
4) 12"-15" driver, to try and match polar response pretty close to the wave guide
5) Smooth, flat frequency response from 100-1.5kHz
6) Fs and Qts that allow a ported -3db point preferably between 40-45Hz
I'm most willing to compromise on the bass extension. I know I can get a -3 at 60Hz, maybe even 50Hz. The bass extension I want and the frequency smoothness I'd like seem to not match up in any of the drivers I've found. I can find a driver that's smooth to 1kHz, but I don't think the DDS will go that low based on what I've read.
If I have to compromise, cheaper is better, as this is only my "first try" and if it turns out good I'll probably try to figure out a way to make my own waveguides. In which case, I'll make some more and use a larger waveguide and a more expensive woofer. My current favorite woofer is the Selenium 12ws600, but it will only get to the high 50's. It's flat and cheap. The Selenium 15ws600 goes low enough, but it isn't flat - it has a strange dip at 300-400Hz. The BMS 15n630 might work, but the BMS frequency graphs are hard for me to read. The Radian 2216 looks okay, but they don't show the response above 1kHz which make it seem questionable. That's the way it seems to go, always something. So, I'd love to get some recommendations from people that have more experience.
I'm looking to build a high efficiency two way. I'm planning on using the DDS ENG 1-90 Pro waveguide. The compression driver is probably going to be the Radian 465pb, but that could change. The Radian 475pb, the BMS 4550, the Beyma CP-380M, and the Peavey RX22 are also considerable. I can't find a woofer to match that looks right to me. I'd like these things:
1) Efficiency >94db
2) Driver w/ 3"-4" voice coil for low power compression
3) Relatively cheap, like <$400US, which I think would leave out TAD and PHL
4) 12"-15" driver, to try and match polar response pretty close to the wave guide
5) Smooth, flat frequency response from 100-1.5kHz
6) Fs and Qts that allow a ported -3db point preferably between 40-45Hz
I'm most willing to compromise on the bass extension. I know I can get a -3 at 60Hz, maybe even 50Hz. The bass extension I want and the frequency smoothness I'd like seem to not match up in any of the drivers I've found. I can find a driver that's smooth to 1kHz, but I don't think the DDS will go that low based on what I've read.
If I have to compromise, cheaper is better, as this is only my "first try" and if it turns out good I'll probably try to figure out a way to make my own waveguides. In which case, I'll make some more and use a larger waveguide and a more expensive woofer. My current favorite woofer is the Selenium 12ws600, but it will only get to the high 50's. It's flat and cheap. The Selenium 15ws600 goes low enough, but it isn't flat - it has a strange dip at 300-400Hz. The BMS 15n630 might work, but the BMS frequency graphs are hard for me to read. The Radian 2216 looks okay, but they don't show the response above 1kHz which make it seem questionable. That's the way it seems to go, always something. So, I'd love to get some recommendations from people that have more experience.
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