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How do they sound? Just glorious! Improved from about 500Hz and up in every way, they still take no prisoners in the bass region. The Art of AMT Sound Technology.
The 422H Heil AMT Hybrid Headphones, with two drivers, one being the first Heil driver ever utilized in headphones, is downright scary good. The 422H is not only head of its class, but is its only occupant! Who could have seen this leap in technology? Sound as clear as light? ESS has boosted the fun factor and affordability in headphones by a country mile.