You are entitled to have true experiences

But our world is so loud

That’s where we come in

Meet Nils

“I like listening to music and stop running around,
chasing stuff that almost doesn’t exist.
That’s why I started VoxTonus


vox /wōks/ Latin for voice

tonus /ˈto.nus/, Latin for tone from Old Greek τόνος /tó.nos/ for tension

VoxTonus – tone of voice the significance of small details influencing how a message is understood

The more we focus on what ought to come across, the purer and therefore more significant the experience.

Meet the Maker

My first stereo system was made from my sister’s Garrard gramophone, my mother’s tube radio, and a floor-standing bookshelf converted to a huge speaker. I realized it sounded better depending on where I placed the loudspeaker on the floor.

This is where it started, my lifelong interest in authentic music experience. Somewhere along the line I realized that the true music experience only exists once. In the moment when it’s played, by you or by someone else. Luckily a skilled sound engineer’s recording will pick up a fragment of that moment.

The timbre in the voice or instrument, it’s coloring, space, crispness, dynamics can be part of that fragment. These details, the tension in the voice or instrument, can create the illusion of being true. You will notice it on your breathing and heartbeat. This music experience leads you to yourself. But only if the sound is pure enough.

This requires a good audio system where all interdependent links are in balance. Over several decades I searched for all these variables and links, sometimes without knowing it at the time. But the goal was to identify those that set the purity level, those that are controllable and those that are not. I’m linking common sense with digital innovation and knowledge as old as ancient civilizations.

As a passionate music lover, I want to use what I learned to create that true music experience. As a scientist and engineer I know it is impossible. But that doesn’t mean I can’t try. My research finally rewarded me with a pure sound illusion. That’s when I started VoxTonus.

Nils Hjelte
Creator of VoxTonus

The Cochlea Concept

The loudspeaker design principle and the loudspeaker size interact with the listening space. Therefore, they are fundamental factors to be considered when developing solutions for music lovers and compact-living advocates.

The tension between compact size and “big” sound places high demands on the possible design solutions. The Cochlea Concept was developed precisely to strike a balance between the two.

A compact loudspeaker with controlled sound dispersion provides the best listening experience. These two factors together provide the uniform sound propagation over the entire frequency range and improve perceived audio characteristics of direction, distance, reflections, spaciousness, reverbs and transients of the sound at the listening position.

The Cochlea Concept™ also accommodates for the conflicting properties of low and high frequencies at reasonably low distortion. The name of the VoxTonus design concept stems from its resemblance to the human inner ear.

Florian Köhler


"I don't dare listening to anything else. The sound I get is just too much of what I need for myself."

Ken Öster

music lover

"My love for music take your mind."

Erik Westerfelt

musician student

"I find myself in a creative bubble. The sound of the speaker fills the room and my reality disappears."


nano-Pi is the premium model in The Cochlea™ Concept Series, developed for the needs of the committed Music Enthusiast. Using innovative audio technology effectively to guarantee a small size, nano-Pi lives up to compact-living demands without compromising on sound quality.

The nano-Pi audio system includes two active loudspeakers, an exernal DSP system, and all cables necessary. As with all VoxTonus products, every nano-Pi loudspeaker is handcrafted and tested for quality assurance in the VoxTonus laboratory by Nils Hjelte.

The outside of the loudspeaker cabinet consists of side panels made of oak and our signature AluMatrix™ composite that covers the front, rear, top and bottom. The AluMatrix™ composite is folded around the Cochlea coil inside the cabinet, damped with a mix of materials to create an acoustically dead box.

A curved solid aluminum front is bolted onto the cabinet that holds the loudspeaker drivers in place. A laser-cut guard of stainless steel protects the loudspeaker drivers without influencing the magnetic field generated by Neodymium super magnet assembly. Applying our Cochlea Concept contributes to an extremely linear behavior and reduces distortions to a minimum.

Based on VoxTonus quality requirements, the amplifiers used are deliberately designed to be 10 times clearer (a THD value of less than 0.02%) than the signal the loudspeaker drivers are able to generate.

What's included?

  • 2 individually paired nano-Pi loudspeakers
  • 1 DSP connection box (RCA input, mini-XLR output)
  • 2 double-shielded mini-XLR cables (3,5m)
  • 1 RCA cable (1,5m)
  • power supply adapter for the DSP
  • 1 IEC power connection cable (2m)
  • AC sockets with remote control
  • 1 individualized measurement report

Quasi Non-Echoic Testing

Each loudspeaker driver is measured at 85dB SPL to pair those loudspeakers that are most similar to each other. The result is that each pair of loudspeakers only deviates from each other by less than 1.1dB over the entire frequency range.

After the final assembly, each nano-Pi loudspeaker is tested and measured in the VoxTonus quasi non-echoic chamber with calibrated equipment. Each pair of loudspeakers is delivered with a report detailing the unfiltered test results of the following properties:

  • Frequency range and phase at 90dB SPL, individually and paired
  • Step response
  • Total harmonic distortion (THD)
  • Directivity within ± 60 degrees horizontally in 5 degrees steps
  • Cumulative spectral decay

Next Level Material

AluMatrix™ is a composite consisting of two layers of aluminum that are connected by a Divinycell Matrix, which serves as vibration-damping core. This combination forms an extremely stiff and light composite (more than 6x stiffer and 30% lighter than MDF or plywood). AluMatrix™ reduces resonating noises commonly found in loudspeaker cabinets to a practically inaudible level and optimizes sound performance with its excellent thermal conductivity properties.

Parameter Performance Explanation
Frequency response (±3dB ) Measured at 85dB/ 1m 47Hz - 22.000 Hz Normal sensitiveness of SPL difference
Frequency response (±1dB ) Measured at 85dB/ 1m 135Hz - 20.500 Hz Precision sensitiveness of SPL difference
Paired frequency range (1dB ) Measured at 85dB/ 1m 200Hz - 22.000 Hz Stabilizing music 3-dimensional image in the listening room
Maximum output SPL Measured at 85dB/ 1m 102dB Maximum sound pressure loudness level of music
DSP resolution 24 bit CD standard 16 bit
Sampling rate 48kHz CD standard 44.1kHz
Audio inputs standard RCA, analog line level input Unbalanced
Audio inputs optional 1 XLR analog line level input Balanced
Audio inputs optional 2 RCA and Toslink digital SPDIF Digital sampling rate 192kHz
Audio outputs optional 3 XLR analog line level aStand active 100W bass
Recommended room size Standard height 2.45m 12 m² for 100dB SPL SPL at a concert with full symphonic orchestra
Design features
Design features Measures Explanation
Driver Low/Mid frequencies 90 mm bamboo cone, Nd super magnet, under-hung coil Extremely linear behavior design to give minimum THD
Driver High frequencies 25mm ceramic dome, Nd magnet, Fe-fluid damped coil Light and stiff dome with high break-up frequency
Amplifier output power Lf 30W + Hf 15W THD < 0.01%
Signal cables with
gold plated aluminum XLR contacts
3,5m double shielded Star Quad professional studio cable Noise immune, RF rejecting and electro magnetic shielded
Cabinert Material Explanation
External structure AluMatrix composite, an aluminum laminated PVC core Low ratio stiffness/weight to reduce colouration.
Cochlea™ Coiled MDF insert An internal bracing labyrinth
Wave guide baffle Milled aluminum Reduce diffraction and improve sound wave pattern
Side panels Compressed oak on HDF Design and reduce colouration
Flared port Symmetric turned aluminum Linear bass reflex and brace
Connection plate Milled aluminum Pressure resistant
Connection box Die casted aluminum Holds DSP and inputs/outputs
Miscellaneous Measure Information
Cabinet dimensions 325mm x 125mm x 252mm Height x width x depth
Cabinet weight 5.9 kg a piece Additional 2kg cables
Cabinet volume 4.9 liters/9.7 liters Internal / external
Connection box dimensions 25mm x 80mm x 125mm Height x width x depth
Power 230 V / 50 Hz Grounded AC contacts only

Get in touch!

VoxTonus AB

Domarringsvägen 19

S-331 33 VÄRNAMO


Mobile: +46 (0)705 908 126

Office: +46 (0)730 296 658