I have a crossover question for a sealed speaker system for music. I plan to use a Dayton RSS265HF-4 10" woofer in a 1 cu/ft sealed cabinet (500hz - 60hz). This will be combined with a UM12-22 (2.8 cu/ft sealed) or a UM15-22 (4 cu/ft sealed) that according to the partsexpress website will have an f3 respectively of 34hz or 33hz. The crossover is a minidsp.
From the simulation (winsd) on the RSS265HF-4 it appears that it has a nice controlled rolloff in a sealed cabinet. Could I just let this roll off naturally (without a high pass) and then use a first order low pass filter on the UM12-22 or UM15-22 to blend to the RSS265HF-4. Or am I better off using a high pass and low pass between the speakers. Would there be much of a different between the UM15 vs UM12 for filling out the bottom octave?
Thank you for any comments you may have.
Regards,
Gary
From the simulation (winsd) on the RSS265HF-4 it appears that it has a nice controlled rolloff in a sealed cabinet. Could I just let this roll off naturally (without a high pass) and then use a first order low pass filter on the UM12-22 or UM15-22 to blend to the RSS265HF-4. Or am I better off using a high pass and low pass between the speakers. Would there be much of a different between the UM15 vs UM12 for filling out the bottom octave?
Thank you for any comments you may have.
Regards,
Gary
It depends on what sound pressure level you want to achieve. If you let the 10" woofers play down to as low as they go, you have four low frequency sources, which you can locate in the room such that the effect of room modes is reduced. Search for multi sub if you want more information. If it must be loud, the 10" woofers should get a high pass filter to prevent them from bottoming out before the subwoofers do.
As the UM15 is larger, it has the capability to play louder than the UM12 and have less distortion at the same level. Use at least a 2nd order low pass filter on the subwoofers to prevent them from being localized. I would aim for a 4th order Linkwitz-Riley acoustic response.
As the UM15 is larger, it has the capability to play louder than the UM12 and have less distortion at the same level. Use at least a 2nd order low pass filter on the subwoofers to prevent them from being localized. I would aim for a 4th order Linkwitz-Riley acoustic response.
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TBTL
The SPL will be a non issue for my application (home stereo). Thank you for the help. I believe the 4th order LR can be implemented on the minidsp. I will read up on multi-sub but my initial thought was to stack them on top of each other and bandwidth limit each with a crossover. The 3db point on the RSS265HF-4 in the sealed cabinet is approximately 51hz from the spec.
Best Regards,
Gary
The SPL will be a non issue for my application (home stereo). Thank you for the help. I believe the 4th order LR can be implemented on the minidsp. I will read up on multi-sub but my initial thought was to stack them on top of each other and bandwidth limit each with a crossover. The 3db point on the RSS265HF-4 in the sealed cabinet is approximately 51hz from the spec.
Best Regards,
Gary
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