Originally Posted by
RMC
Hi Soulman,
RE: "I believe the problem with these cabinets is the large distance between the horn and the woofer."
I have something else which may be relevant to your sound problem.
From the picture you posted, and subject to the perspective (depth) a viewer may have, it appears to me the MF/HF drivers are somewhat behind on top of the cab.
According to J. Eargle (Handbook of Sound System Design, chapter: Dividing Networks/Components Matching, section: Physical Placement of HF and LF Elements), the horn should be mounted on top of cab with its mouth flush with the front of the enclosure.
"A good rule to follow is this: mount the HF horn so that its mouth is flush with the upper edge of the LF enclosure. Then, make the polarity test and determine which poling, if either, results in the greatest output. (...) Details of this are shown in Figure 7-6B. The advantages of keeping the HF horn mouth flush with the front of the LF enclosure are minimized interferences in the crossover region and smoother vertical polar response in the crossover range." (p. 129)
There are sketches explaining this, but I'm not at liberty to reproduce all that because of copyright issues.
However, a small text says: "HF horn flush with LF enclosure, Displacement about wavelength at crossover; therefore, wire HF driver for maximum output: both outputs in phase at crossover" (p. 128)
Hopefully the above may help with the issue. Regards,
Richard