i could never tolerate the original ESS AMT1 in the top where it was so rough as to be intolerable. the same effect was present in early shibata equipped cartridges and the original threshold 400 amp. i can only imagine the high frequency cacophony if all three of those components had been used together.
i never got to hone in on the lows of the towers like transtatics with their transmission line loading in the lows. i will guess they werent quite as good as the IMF and Fried embodiment of that approach. i think mike wright of the UK did that design work on the IMFs and later TDL.
there are numerous speakers out there now with heil drivers including one with a very large amt (Atma Audio) marketed by Paul Squillo Music Systems.
i heard a LARGE version of this speaker at the moorpark theater while attending a performance of dan hicks and it didnt exhibit the roughness i referred to that i heard in the AMT1s.
perhaps this technology has evolved to a more usable state.
i never got to hone in on the lows of the towers like transtatics with their transmission line loading in the lows. i will guess they werent quite as good as the IMF and Fried embodiment of that approach. i think mike wright of the UK did that design work on the IMFs and later TDL.
there are numerous speakers out there now with heil drivers including one with a very large amt (Atma Audio) marketed by Paul Squillo Music Systems.
i heard a LARGE version of this speaker at the moorpark theater while attending a performance of dan hicks and it didnt exhibit the roughness i referred to that i heard in the AMT1s.
perhaps this technology has evolved to a more usable state.