Hubli-based deep-tech firm scales in-house production and retail expansion to commercialise a new form of “physical sound” headphones.
A little-known Indian audio startup is quietly attempting to redefine how headphones reproduce bass and it is doing so by investing heavily in its own manufacturing ecosystem rather than outsourcing production.
Rapture Innovation Labs, the company behind the tactile-audio headphone brand Sonic Lamb, is expanding its in-house production lines after overcoming a challenge that has limited its growth so far: manufacturing a completely new kind of audio transducer at scale.“Traditional headphones try to reproduce bass purely through air pressure, but our impulse driver physically delivers low-frequency sound through the skin. This lets listeners feel the bass without increasing sound pressure in the ear canal,” said Navajith Karkera, CEO & Co-Founder from Rapture Innovation Labs, the company behind the Sonic Lamb tactile-audio headphones.
Unlike conventional headphones that rely solely on dynamic drivers, the startup’s patented “impulse driver” converts audio signals into mechanical impulses that travel through ear pads and the user’s skin. This enables low-frequency sound typically below 200 Hz to be felt physically rather than only heard. The result is an experience closer to standing near a concert subwoofer, without increasing the sound pressure directed into the ear canal.
While the company has already shipped more than 7,000 units and recorded roughly ₹8–9 crore in revenue, scaling the technology proved far more difficult than developing it. Early attempts to outsource manufacturing failed due to the complexity of assembling the hybrid architecture combining impulse drivers and traditional dynamic drivers.
The company therefore moved to an unusual strategy for a young hardware startup: building its own production lines within its R&D facility. Today, the firm operates dedicated lines for impulse-driver fabrication and headphone assembly, while outsourcing only simpler components such as injection-molded parts and PCBs.
This manufacturing pivot is now enabling the next phase of growth. The company plans to add two additional production lines and ramp up distribution across e-commerce and retail channels including Amazon and premium electronics store chains such as Imagine and iPlanet. Another retailer, Future World, is also expected to carry the product, potentially placing the headphones in about 100 stores.
A second-generation headphone, launching later this year, will feature a more efficient impulse driver and improved ergonomics while cutting battery size nearly in half.The technology has also begun attracting industry recognition. The upcoming model recently received a nod at the CES Innovation Awards, marking a rare win for an Indian company in the personal-audio category.Beyond headphones, the startup sees its tactile audio platform extending into automotive seating, gaming headsets, VR devices, and even cinema seating applications where low-frequency sound is traditionally reproduced by bulky subwoofers. If successful, the company’s strategy could highlight a new direction for Indian deep-tech hardware: building proprietary manufacturing capability around breakthrough components rather than relying entirely on global supply chains.
