Wearable TechDrop HD6XX vs Sennheiser HD660s (Headphones Compared)Vaibhav ShardaJune 16, 2021June 16, 2021 by Vaibhav ShardaJune 16, 2021June 16, 202100 This is the second part of my drop test on the HD6XX and the Sennheiser HD660s. I will let you know how the HD6XX performs...