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ROSESELSA x AAV CJ20 In-Ear Monitors IEM
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Roseselsa x AAV CJ20 In-Ear Monitors IEM Planar Magnetic 24 Ohm 102dB 20Hz-20kHz
The Roseselsa CJ20 are in-ear earphones with planar magnetic drivers, designed in collaboration with Andy (AndyAudioVault). They feature a 14.2mm driver to ensure precise transient response and low distortion, thereby preserving the clarity and coherence of the sound across the entire frequency range.
Roseselsa CJ20: Planar magnetic transducer
The Roseselsa CJ20 features a 14.2mm planar magnetic driver designed to ensure a fast transient response, whilst minimising distortion to preserve signal clarity across the entire frequency spectrum. This design, in addition to its intrinsic responsiveness, delivers a smooth, natural sound, ensuring listening comfort without auditory fatigue during long listening sessions.
Roseselsa CJ20: All-metal body frame
The all-metal chassis is built on a rigid structure that effectively absorbs the mechanical stresses of everyday use, whilst minimising unwanted vibrations that could distort the audio signal. Beyond durability, this structural mass acts as a passive dampener of internal resonances, resulting in reduced background noise and improved separation of detail. This design is therefore not merely an aesthetic choice, but forms part of a strategy for vibration control, helping to stabilise sound reproduction in a variety of listening environments.
Roseselsa CJ20: Graphene-coated OCC cable
The CJ20 features a graphene-coated OCC single-crystal copper cable, whose high conductivity helps minimise signal transmission losses. This core design is complemented by interchangeable modular connectors in Jack 3.5mm and Jack 4.4mm sizes, allowing the headphones to be easily adapted to both single-ended and balanced sources without any changes to the setup.
Roseselsa CJ20: Developed in collaboration with AndyAudioVault
The CJ20s have been tuned in collaboration with Andy (AndyAudioVault), with a tonal character designed for rock music, taking into account the dynamic range and clarity requirements specific to this type of recording. This tuning is accompanied by two sets of silicone ear tips – wide and narrow – allowing you to adjust the frequency balance and bass response to suit your needs.
Technical characteristics
| Specifications | |
|---|---|
| Product type | In-Ear Monitors |
| Drivers | 1x 14.2mm planar magnetic driver |
| Impedance | 24Ω |
| Sensitivity | 102dB |
| Total harmonic distortion (THD) | ≤ 3% @ 1kHz |
| Frequency response | 20Hz-20kHz |
| Cable conductor | Graphene-coated OCC copper |
| Earphone connectors | CIEM 0.78mm 2 pins |
| Termination connectors | Jack 3.5mm Jack 4.4mm |
| General | |
|---|---|
| Color | Black |
| Package | 1x Roseselsa CJ20 1x CIEM cable 1x 3.5mm jack termination 1x 4.4mm jack termination 1x Carrying bag 8x Pairs of ear tips |
| Color | Black |
| Impedance (Ω) | 24 |
| Efficiency / Sensitivity (dB) | 102.0 |
| Wireless | No |
| Cable termination | Jack 3.5mm |
| Cable termination | Jack 4.4mm |
| Headphone / Earphone connector | CIEM |
| Phone call feature | No |
| Noise reduction | No |
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