My experience with them is VERY limited. They are highly efficient as you probably know. They produce very little deep bass, if any at all. For that reason, a horn design probably would work slightly better than a ported design. The horn would help maintain the high average spl on the bottom end to whatever the cut-off frequency that the driver and cabinet were capable of doing. Bass horns also TYPICALLY have large unbraced cabinets that tend to resonate quite a bit, adding to the "apparent" bass output of the speaker. It is not uncommon for someone using Lowther's to have some type of sub or bass reinforcement for these reasons. Sean
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