IMR ACOUSTICS R1 REVIEW
June 16, 2018 Comments Off on IMR ACOUSTICS R1 REVIEW
“You are talking as much as a +12-18dB difference between the low-end up to 200Hz and a rather more linear curve for the official chart. The remainder of the response curve is largely unaffected beyond 2k for both charts. However, the black filter upper mids curve will seem more pronounced due to the heavier dip from the mid-bass down into the lower mids. I can only assume the relatively mild u-shape and slightly forward upper mids and lower treble of the official chart is without any filter at all.”
Audiophilepure 
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