This review is for individuals who own quality IEM’s, earbuds, or headphones. If you don’t, the Helm Audio Bolt is probably useless. If you plan on using this with your laptop the sound quality boost is worth it – at least it was for mine. I don’t know if it’s $100 worth it but it’s close enough.
https://www.amazon.com/Portable-Headphone-Amplifier-Playback-Certified/dp/B086GK94X2