Over the summer, German start-up Lofelt GmbH has raised just about €600,000 ($664,868.57) through a Kickstarter campaign to finalise and mass produce what the company describes as a wearable subwoofer.

A 17mm x 20mm x 6mm wrist-worn device, Basslet incorporates the company's patent-pending LoSound engine that faithfully and silently reproduces the punch feel of bass lines, in direct contact with the wearer's skin. Based on a voice-coil principle, this haptic device lets the wearers experience the music in a more immersive way, as if they were at a live concert, albeit only wearing their headphones and the Basslet. It is designed to transmit the full bass spectrum, from 10 to 250Hz directly to the skin, and is felt as a whole external music vibration.

Founded in 2014, the start-up is headed by CEO Daniel Büttner, a former sound engineer at music creation software and hardware provider Ableton. Before joining Lofelt as its CTO, co-founder Gwydion ap Dafydd was product designer at Ableton's main competitor Native Instruments, a company producing software and hardware for computer-based audio production and DJing.

EETA haptics 01 Figure 1: Lofelt's co-founder and CTO Gwydion ap Dafydd

With a degree in electronics engineering from the University of York (England), Dafydd had spent six years at Texas Instruments prior to joining the music industry. The two met through mutual friends when Büttner was looking for partners to develop the Basslet.

"He gave me a demo two years ago, at the time it was a bulky and crude prototype, but it convinced me," remembers Dafydd. For Lofelt's first year of existence, the two co-founders bootstrapped the company, before receiving Angel seed funding at the end of last year which helped them pay wages and build up their team.

The recent Kickstarter campaign then provided Lofelt with the cash flow necessary to go to production.

But how did this "haptics for music" idea came up?

Next: Haptic technology lets you feel the music