Crinacle’s IEM collabs are becoming a genre of their own.
Audiophile reviewer, Crinacle, recently released a video showcasing his latest IEMs collab: the Singolo, created in partnership with Kiwi Ears.
These IEMs challenge the norm by delivering deep bass typically associated with subwoofers, all from a single driver. This is achieved by combining new modern technology with a resonator from the 19th century.
The Innovation Behind the Singolo IEMs
The Singolo’s standout with their Kiwi Acoustic Resonance System (KARS), which Crinacle explained in his video.
In the case of the Singolo, KARS incorporates a Helmholtz resonator. These are precisely tuned and placed within the IEMs to specifically target and eliminate the 300 Hz frequency range. This level of precision in frequency cancellation allows Singolo to offer a cleaner and more defined bass response.
This technology is inspired by the principles of the Helmholtz resonator from the 19th century. It uses a complex network of tubes within the IEMs to eliminate specific frequency ranges without affecting others.
But, despite the old age of the resonator, Kiwi Ears used modern technology to fine-tune it further.
According to Crinacle, the KARS is made through advanced 3D printing techniques. This allows for the precise construction of the internal structures critical to the resonator’s success.
“By calculating the right length as well as the diameter of the structure and then printing it, we have designed the resonator of the Singolo to specifically target 300 Hz, touching no other frequencies around it.” he shares.
“What this means is that we can tune up the bass up high. And then, use the resonator to kill 300 Hertz in order to create a clean bass shelf that would otherwise be completely impossible in a single DD IEM.”
Moreover, Crinacle discusses how Singolo do not only exemplify technological innovation. They also serve as a proof of concept for the future application of KARS technology.
He notes that other IEMs have also attempted to utilize back-volume resonators. But, the Singolo are the first to achieve a significant, measurable impact on frequencies below 1000 Hertz.
“I know that there are IEMs out there with back volume resonators. But they either (A) don’t work, or (B) have such negligible effects that they might as well not be there at all.” he says.
“The Singolo are, as far as I know, the first IEMs with a back volume resonator that targets under 1000 Hertz and has a significant, measurable difference.”
How They Sound, According to Crinacle
The Singolo are tuned to what Crinacle likes. He described them as focusing on clear vocals and instruments, alongside a strong sub-bass shelf—qualities he values in sound tuning.
The sound profile brings vocals and instruments to the forefront in a way that’s both impactful and detailed. He claims that this reflects the care and precision that went into Singolo’s development.
“Technology out of the way, the Singolo are tuned to, surprise, surprise, a signature that I actually like.” he says.
“I consider it more vocal-centric. Instruments are a lot more forward. And, of course, it comes with the sub-bass shelf that all of you come to expect as something that I’ve tuned.”
Availability and Pricing
Despite their advanced technology, the Singolo are priced at only $79.
The Singolo should come in four color options: black, blue, purple, and teal. They are now available to order on Linsoul’s official website and Amazon.