ROSESELSA x AAV CJ20 Planar Magnetic IEM

14.2mm Planar Driver • Tuned for Rock & Metal

The ROSESELSA x AAV CJ20 is not just another planar IEM—it’s a purpose-built machine for rock and metal lovers. Co-tuned with Andy from Andy Audio Vault, the CJ20 combines a massive 14.2mm planar magnetic driver with precision tuning to deliver explosive energy, razor-sharp detail, and lightning-fast transients.

If your playlist is filled with distorted guitars, aggressive drums, and layered vocals—the CJ20 is engineered to bring that intensity to life.

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⚡ Built for Rock & Metal Enthusiasts

Unlike generic tunings, the CJ20 is crafted specifically for rock and metal genres. It delivers:

• Tight, punchy bass that never muddies the mix
• Forward, energetic mids for guitars and vocals
• Crisp, extended treble for cymbals and micro-details

With dual ear tip options (wide bore & narrow bore), you can fine-tune the sound depending on your music style—whether you want more air or more body.

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🔊 14.2mm Planar Magnetic Driver Performance

At the heart of the CJ20 lies a large 14.2mm planar magnetic driver, delivering:

• Ultra-fast transient response
• Exceptional detail retrieval
• Low distortion across the frequency range
• Clean, high-resolution sound signature

This results in a fast, punchy, and highly resolving presentation—perfect for complex, fast-paced tracks.

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🧠 Co-Tuned by Andy Audio Vault

Backed by years of critical listening experience, Andy from Andy Audio Vault has carefully tuned the CJ20 to meet the demands of metalheads and audiophiles alike.

His signature tuning ensures:

• Accurate tonal balance
• Engaging, energetic sound
• Genre-specific optimization

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🛠️ Premium All-Metal Build

The CJ20 features precision-crafted all-metal shells that are:

• Lightweight (just 5.4g per side)
• Durable and premium in-hand
• Designed to reduce internal resonance

This results in cleaner sound reproduction with improved clarity and control.

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🔌 Graphene OCC Cable with Modular Plugs

Included with the CJ20 is a high-purity graphene-plated OCC single crystal copper cable, designed for superior signal transmission.

• Modular termination system
• Includes 3.5mm + 4.4mm plugs
• Low resistance for cleaner audio signal

This makes the CJ20 versatile for both portable and balanced audio setups.