T90A vs Aperion Audio MKII Planar-Magnetic Ribbon Super Tweeter
The MKII Planar-Magnetic Ribbon Super Tweeter's impedance is 6Ω against the T90A's 8Ω, its sensitivity 94 dB against 106 dB, and its high-frequency extension 40 kHz against 35 kHz. Both share ways (1).