The Positive Grid Spark Neo offers a potential solution to this conundrum, as not only does it function as Bluetooth headphones, but also as a wireless guitar amp that only you can hear.

For many, however, it doesn’t restore positive feelings such as happiness or excitement. “We had always assumed that by reducing negative emotions—anger, fear, anxiety, sadness—the natural ...

they often deliver more electricity than grids can absorb, leading to the curious phenomenon of “negative” power prices. This year is likely to see a record number of hours when the price of ...

At the same time, however, it leads to a vicious cycle. The costs of running the grid and paying for coal power fall on fewer people, who then have more reason to opt out, undermining the ...

That's where the Positive Grid Spark Neo comes in, which puts a powerful smart amp on your head. A few years ago, Boss released a pair of wireless headphones. Though unusual, a music gear company ...