I use my Merrill Zigmahornets daily and can't believe how good they are. You can get the instructions on-line to build the 1/4 wave transmission line cabinets. My only mods were to use better wiring, real binding posts and spiked feet.
The bass from these is tremendous due to the cabinet design. I run them with a 10 watt tube amp and never run out of power. Guessing at 94-94db efficiency. They are very smooth and not "shouty" at all like some mentioned above. The Lowthers have that bump around 1000hz which is very noticable in my opinion.
Since the Merrill drivers are no longer available, my preference would probably be the Jordan 4". The closest I have seen to these in a production model is the Role Audio to give you an idea of what you will get.
The bass from these is tremendous due to the cabinet design. I run them with a 10 watt tube amp and never run out of power. Guessing at 94-94db efficiency. They are very smooth and not "shouty" at all like some mentioned above. The Lowthers have that bump around 1000hz which is very noticable in my opinion.
Since the Merrill drivers are no longer available, my preference would probably be the Jordan 4". The closest I have seen to these in a production model is the Role Audio to give you an idea of what you will get.