Dekoni Audio EPZ-DT78990-PL Replacement Ear Pads for Beyerdynamic DT and AKG K Series Platinum Synthetic Leather grip-protect cases What’s the difference between the JBLXTREME4BLKAM (OB) Size:3 Pair Set S/MS/M sale making the treble extension

Dekoni Audio EPZ DT78990 PL Replacement Ear Pads for Beyerdynamic DT and AKG K Series Platinum Synthetic Leather grip protect cases What’s the difference between the JBLXTREME4BLKAM (OB) Size:3 Pair Set S MS M sale making the treble extension What’s the difference between the DT770 990 PRO and the DT 1770 1990 PRO 1 mA 10 Hz to 50 kHz Up to 107 dB A Weighted Analog in (BYPASS EQ mode) up to 10 hours Noise Attenuation Maximum SPL Adjustable Gain Range USB Input Analog in (EQ mode) up to 7 hours + 37 dB 1kHz @ 3% THD 40 dB to +60 dB Battery Charging Temp Range Operating Temp Range 113 dB SPL Charging Requiorments 0° to 45° C (32° to 113° F) 18° to 57° C (0° to 135° F) Net Weight USB powered: 5 V 0