Background: I'm newish at the headphone game. My 'phones for comparison: Sony MDR-V600 - Closed back, folding, mid-high of Sony's range 20 years ago Bose QuietComfort 35 - Noise canceling, closed back Sony & Panasonic mass market IEMs JBL TUNE130NC noise cancelling wireless mass market IEMs I bought these to replace the aging Sonys above. The ear pads are falling apart and I find them lacking in bass response. I still use the QC35 and the mass market IEMs. I thought I would compliment the closed-back Sonys and maybe still use them from time to...