Handy things with variable crossover frequency and level. I have used them occasionally with my Jordan speakers. They enhance the HF as you would expect and are quite subtle with the lowest level and highest crossover setting although I found they blended best at 16khz. They can also blend better when out of phase with some speakers. I guess this depends on the phase behaviour of the tweeter crossover in the main speaker.
£75 collected from North London,or plus postage at buyers risk. (A few years ago I sold a different pair and a solder joint came loose in transit.)
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