Periodic Audio Carbon - In-Ear Monitors

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Sale price$289.95 Regular price$579.95
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Oh Say Can You C

The C (Carbon) IEM is unique. Lab grown diamond meets Neil Diamond. The ultimate statement in resolution, with distortion below any other IEM we know of. Transparency starts and stops with C. Enough fun built in to make listening to any style a joy but revealing enough to hear any detail buried in the mix.

C utilizes a lab-grown diamond layer (8 microns) on our own proprietary high-temperature polymer substrate. All components inside our IEMs were 100% designed and tooled in-house, resulting in a totally unique product.

The sonic signature of C is an interesting mix of Ti and Be, with the enhanced bass response of Ti but the high-end extension of Be. Due to the very high Young’s modulus (a measure of stiffness) and internal speed of sound, C’s diaphragm moves homogenously with no lag across the surface.  It resists bending and distortion better than any metal, but is lighter than most metals.

What’s New With the C?

We’ve done a few great changes to C – and the whole line – to improve performance and user experience.  This starts with a new material for the entire enclosure.  We worked for 3 years with Eastman Chemicals, one of the largest plastics companies in the world, to research, develop, and quantify new polymers for acoustic applications.  

Our research led us to a specific blend of their Tritan™ copolyester.  This material proved to be not just rigid, but acoustically dead with lower energy storage and transmission than the polycarbonate we were using.  Stray resonance and noise is lowered even more.

We also refined the external and internal geometry to make it more anti-resonant, so clarity is increased alongside the improvements of the materials used.  The result is the most stable, lowest resonant IEM enclosure ever made.  All with the lowest weight enclosure possible.

I See a Detachable Cable?  What’s That About?

We have also developed our own 2.5mm jack: the IDEEL connector.  This connector is the world’s smallest 2.5mm jack, measuring just 3.6mm across, and a tiny 9.5mm mounting depth. This jack allows us to use the very robust 2.5mm TS plug in our tiny IEMs.  No more delicate MMCX or difficult 2 pin plastic connectors needed.

Mechanical Elements

Transducer Diaphragm: Carbon in diamond lattice
Transducer Surround: Proprietary polymer
Transducer Frame: 316 Stainless Steel
Transducer Magnet: N48H Grade Neodymium
Enclosure Body: Tritan™ copolyester
Protective Grille: 316 Stainless Steel
Bonding Compound: Cyanoacrylate Adhesive
Sealant Compound: Polyvinyl Acetate
Mounting Tips: Medical Grade Silicone and Urethanes
Connector: IDEEL 2.5mm TS compatible connector (tip hot, sleeve ground)

All components are Finite Element Analyzed for stress, strain, and durability.

Frequency Response:
12 Hz to 38 kHz
Impedance: 32 Ohms nominal
Sensitivity: 98 dB SPL at 1mW in ear
Power Handling: 200 mW continuous
Peak SPL: 121 dB
THD: Less than 0.2% THD at 1mW

Physical Properties

Cable Length: 1.2 m
Mass: 2.8 / 16.7 g (IEM/Set)
Operational Temperature: -20 to +50° C
Operational Humidity: 0-95% Relative Humidity
NRR: 31.3 dB (foam eartrip)
Overall Length: 21 mm
Body Diameter: 12 mm
Nozzle Diameter: 6 mm

C Material Properties

Melting Point:
3925 Kelvin
Speed of Sound: 12190 meters per second
Young's Modulus: 1050 Gigapascals
Brinell Hardness: ∞ Megapascals

Included Accessories

1.2 meter long cable single 3.5mm TRS to dual 2.5mm TS jack and metal shells
Single Flange Tips – Small, Medium, Large
Dual Flange Tips – Small, Medium, Large
Memory Foam Tips – Small, Medium, Large
Protective Travel Case
Gold Plated ¼” TRS Adapter Jack
Gold Plated Dual Mono Airplane Adapter

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