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    ESS AMT 1 A (B, C, D, E) Monitor into ESS AMT 3 Rock Monitor

    I have a pair AMT 1 B (1979) and a pair of AMT 1 E Monitors (1994) The crossover frequency is set at 1000Hz. They are both good speakers, however I am convinced that this XO frequency is too low. I have recently done some experiments with a wide band speaker allowing me to cut of at 1500Hz and...
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    Big Heil AMT in compact, bi-amped 2-way set up with electronic crossover–help needed!

    Hi there and good evening! I am a starter in DIY speaker building (and a first time thread poster here) and look for some advice on my first project! Maybe some of you experienced guys can help me on this – reading through this forum, I can see there are people here 100 times more experienced...
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    Crossover calculations (e.g., ESS Heil AMT)

    I have some difficulties in figuring out how to calculate the frequency cut off and the attenuation of the two cross over attached. Those are from ESS AMT Monitors. The figure 1 (filter 1) is copied from an ESS schematic. The figure 2 (filter 2) is what I drew from my ESS AMT 1E monitor from...