Otto Motor
Headphoneus Supremus
Silicons...and I use donuts on the Rambos. As to metallic sound: did you try chamber music -- self amplified music? Details are in the end irrelevant as the left earpiece is faulty.Wow, I am shocked by this. My ST-10 sounds great...not unnatural nor metallic. Did you use foams?
I have a similar poorly fitting Sennheiser design, the OMX-185.
If you want to get your money's worth at $100, in an iem that has been well thought out in terms of fit, comfort, cable, and sound...the Sennheiser ie40 Pro is the way to go.
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