Upgraded model of CARBO BASSO from both design and sound quality to Hi-Res.



ZIRCO BASSO is an upgraded model to Hi-Res spec from both design and sound quality of CARBO BASSO that has long been popular. It makes Hi-res sound dynamic and realistic, using Fine-tuned driver unit to sharpen the rich heavy bass and clear mid-high range sound. The contrast between the zirconia jet black form and the ruby red anodized machined-aluminum is finished in a high-quality gadget.

Zirconia housing

ZIRCONIA is adopted for a main housing and Machined Aluminum is for a nozzle. ZIRCONIA, having a high resonance frequency response, reduces a negative effect to a sound source caused by an unnecessary resonance oscillation, and it enables a clear-sound transmission and a thorough reproduction of Hi-Res sound source which is sensitive but rich and mellow.

Fine-tuned Driver

Fine-tuned Driver being tuned until the optimal condition for ZIRCONIA housing plays Hi-Res sound from its rich and brilliant body thoroughly.


Is a new concept Cable-Docking System developed by ZERO. The base component of this system is “M-DOCK cable” composed by OFC(oxygen free copper) Parallel cord which leads a small transmission loss and highly-reliable MMCX connectors*1 which are compliant with MIL Standard.

*1:ZERO’s original spec produced by Japanese connector manufacturer considered among the country’s best.


Adoption of Newly designed straight type stereo mini plug supports smooth insertion and remove by engraved lines on Machined aluminum cover, and expresses a sense of premium quality by a decoration color of Cobalt blue as an accent.
To dock with the optional wireless receiver / M-BTR1(simultaneously released) enables Wireless connection and it evolves to a scalable systmen which has compatibilities with future line up.
In case of trouble or failure a relevant part can be identified and replaced easily.

Increasing L / R distinguishability by L-marker

Adoption of L-marker enhances a distinguishability of left-right housing by ZERO’s minimal and symmetry design. L-marker attached on left side cord under the housing enables left-right identification without direct visual confirmation.

Newly designed straight plug

Engraved lines on the surface of machined aluminum plug cover supports smooth insertion and removal of the plug at output terminal.

Newly developed Parallel cord

Adoption of newly developed OFC(oxygen free copper) separated parallel cord enables transmission of a pure sound source with a small loss, and has both flexibility and durability.


Is a newly developed and a little bigger than “Headphone Clip” on sale with good reviews now, and is a silicone magnet clip, the most suitable for M-DOCK SYSTEM in the motif of Over the top headphones.
Holding the mold parts of original connectors enables a quick retaining and releasing, and allows for reducing a noise by rubbing and touching.
Bundling the rolled-up earphone cords by silicone band and holding them by L&R headphone speaker shape with strong magnets facilitates an easy carrying around and stress-free keeping.

Product Specifications

Plug3.5mm Gold-plated stereo mini plug straight type
CableM-DOCK cable / OFC parallel cord 1.2m [Y-type]
Weight7.5g ( without cord )
Frequency Responce6Hz〜40,000Hz
Maximum input200mW ( IEC standard )
Silicon earpiece : S・M・L ×2 ( M size is attached. )
Carrying Bag
Warranty period1 year

Specifications and product appearance design are subject to change without prior notice due to continual improvements.

◇This product is available in ZERO AUDIO authorized sellers only.

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