I just modified my ESS HEIL 1D and it is 3 times better then the original and is by far the best and most liveliest loudspeaker I have encountered among all loudspeakers I own and have heard and unfortunately I haven't heard many other fine systems.
I added another ess heil 1c transducer separating it from the 1d about 8 inches on top of it using longer screw poles and using a square mesh type square metal frame to place the 1c on top of it. I removed the front 12 inch ess driver and placed it on the REAR, removing the passive radiator and ordered the new ESS 12 inch driver from parts express. I placed that on the front. Now I have a DIPOLAR bass system and the upper highs and mids are done by the ESS HEIL 1C and 1D in a linesource array. I also added the controversial dakiom stabilzers in the crossover to clean up any harsh signal coming from the amplifier. I use paxthon integrate tube amp and a grand fidelity tube cd player and the soundstage is amazing. Modifying the ESS HEIL the way I did puts it another level of performance the original design was unable to do. Everything is wider and bigger. The bass are much tighter and realistic and deeper. The vocals and instruments are as if the musicians are actually there.
If you can afford to add additional ESS heil drivers and woofers, I highly recommend it for you DIY ess enthusiasts.
I collect loudspeakers and I have magnepans, acoustats, eminent techs, klipsch, sls and ohm walsh and by far the ess heils being modded puts me in audio nirvana. I am completely satisified with this set up!
I added another ess heil 1c transducer separating it from the 1d about 8 inches on top of it using longer screw poles and using a square mesh type square metal frame to place the 1c on top of it. I removed the front 12 inch ess driver and placed it on the REAR, removing the passive radiator and ordered the new ESS 12 inch driver from parts express. I placed that on the front. Now I have a DIPOLAR bass system and the upper highs and mids are done by the ESS HEIL 1C and 1D in a linesource array. I also added the controversial dakiom stabilzers in the crossover to clean up any harsh signal coming from the amplifier. I use paxthon integrate tube amp and a grand fidelity tube cd player and the soundstage is amazing. Modifying the ESS HEIL the way I did puts it another level of performance the original design was unable to do. Everything is wider and bigger. The bass are much tighter and realistic and deeper. The vocals and instruments are as if the musicians are actually there.
If you can afford to add additional ESS heil drivers and woofers, I highly recommend it for you DIY ess enthusiasts.
I collect loudspeakers and I have magnepans, acoustats, eminent techs, klipsch, sls and ohm walsh and by far the ess heils being modded puts me in audio nirvana. I am completely satisified with this set up!