I suspect my Elegia's stock cable came defective. I just plugged both my beyerdynamic Amiron home and HIFIMAN HE 5XX cables to the Elegia and on the same volume on the MIYO DAC (12 of 100), they sound a bit louder and unrestrained, and also the bass sounds big and finally level with the rest of the forward mids and well-blended highs.
They're no longer bass shy and bothersome with the showty mids and overall anemic presentation. It's not a small difference. Waddaya guys think? You can still chime in if you've experienced this with other headphones. Is it cable impedance? Cable material? Is my stock cable defective? Is it not defective and that's how the headphones should sound?
I want to mention that the horrible, poor excuse of a stock cable is terminated in 3.5mm TS earcup plugs. The HIFIMAN and beyerdynamic cables have 3.5mm TRS earcup plugs. I don't know if that plays into it. I don't think it matters, but I'm not a cable enthusiast. I live the stock cable, single-ended peasantry lifestyle.