Solo. High Performance On-Ear Headphones. The music you listen to in your headphones should capture all the sonic details the artist wanted you to hear. But normal headphones can’t deliver the rich, full sound in today’s digital audio tracks, especially not smaller, lightweight headphones. But Solos high performance headphones, which are designed for today’s active lifestyles, deliver sound so real, you’ll be amazed it’s all coming from something so compact and portable.