I am considering building a new passive crossover, if there is a better design than the LX5 (else replace the caps and check the resistors). In reading a paper on the Linkowitz-Riley (LR) filter, I see that there is a time shift for drivers not on the same vertical axis. This time shift causes a shift in the vertical acoustic radiation pattern, and if the time shift is not corrected in the speakers, the LR filter could be a bad choice. I presume that the time shift in the Apollo s7 in uncorrected, and as such the LR filter is a bad choice. Is that correct, and could you point me in the right direction?
I thought I was on to the solution with the LR design, but it looks like it's not the proper solution. I will keep reading. I need to figure out what they were doing putting a cap in series with the resistor at the output end of the lowpass on the LX5.
I was going to change from LE15A's to LE14A's after I generated the winISD comparison plot for the c51 cabinet, shown below. Then I decided that is a project that will have to wait until I get a house. The 15's are plenty of bass for an apartment. The new way of watching movies via the internet has led to a lot of what I call whisper/boom audio profile movies. I couldn't watch movies at all with a full range speaker. I will add the 3-3/4in port I came up with using the winISD tool. Need to recheck the volume before I trim it though.
sidney, with new Apollo s7 set