Last night, I returned to Amazon the Sennheiser Momentum 2 wireless headphones received on Nov.8, 2015. The retailer promises full refund. My ears ache from using them, even with the volume low. The problem is bass response, which is too intense for my aged ears. At the same time, I removed the Grado Labs RS1e from Craigslist. I will keep the wired cans.
I let go the Bluetooth set reluctantly. I like the design, construction, materials, and controls. Wireless connects easily and provides ample volume. But bass booms, and the devices on which I listen have limited graphic equalizer or none at all.