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In the Forum: Horn-Loaded Speakers
In the Thread: Macondo’s lowest channel.

Post Subject: Time coherence of ULF - my experiencePosted by scooter on: 11/5/2010

Time coherence of ULF may be less important than that of higher frequencies and that seems to make sense in theory and jibes with my own experience. However, I still think ULF timing matters a lot with respect to a) higher frequency drivers and b) other ULF drivers.

Thus, I never really understood the placement of the two ULF units from the above diagram (aesthetics and boost aside). I thought the explanation would eventually appear on the board - and it did today.

ULF-1 does not seem to be a problem but I can't see anything but time alignment issues a) and b) with ULF-2. Also, despite expert views that one can not locate ULF, I'll bet you are consciously or unconsciously locating that ULF-2 off to the "far right." If I were you, despite room aesthetics, I would consider placing the ULF units near your main horns just for experimental purposes; that might help you diagnose problems and move forward. That could be a bit of a root canal at this stage now that you have pulled out the electronic x-over and are trying to close this chapter but it would be a shame to spoil all of this effort with ULF that should be relatively easy to improve.

In any case, your mileage will vary due to acoustics of your particular room.

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