Noble AGIS II Universal IEM Review

The Noble Audio AGIS II isn’t just another high-end in-ear monitor—it’s a bold showcase of hybrid technology, balancing innovation and musicality in a resin shell. With a unique 8-driver configuration and a deliberate focus on immersion, it’s clear Noble is aiming for an audiophile audience that demands clarity without compromising excitement. At $1,799, expectations are naturally high—but the AGIS II mostly lives up to the hype, offering a listening experience that is both technically precise and artistically engaging.

This detailed review explores the AGIS II’s sound profile, ergonomic design, included accessories, and overall performance, with specific attention to how its bone conduction and balanced armature drivers interact across the frequency spectrum.

What’s in the Box?

• AGIS II Universal IEMs
• Noble 8-core OCC detachable cable (0.78 mm 2-pin)
• Interchangeable terminations: 2.5mm, 3.5mm, 4.4mm
• Multiple ear tips for optimal fit
• Stainless steel cleaning tool
• Microfiber cloth
• Compact carrying case
• Large zipper storage case

Build & Design

The AGIS II combines form and function in a sleek, ergonomic shell. Its hand-poured resin housing feels tailored to the ear, delivering a snug fit that’s both secure and unobtrusive for long sessions. Those with smaller ears may notice a firmer seal, but the lightweight design avoids pressure buildup. Noble’s hybrid faceplate integrates metal mesh for ventilation and a bold, aesthetic pop. The branding is tastefully minimal, adding to the IEM’s high-end visual appeal.

The included accessories underscore Noble’s attention to detail, particularly the cable system, which allows you to easily switch between balanced and unbalanced sources. For testing, I paired the AGIS II with the FiiO Snowsky Retro Nano DAC/Amp—a pairing that gave the IEMs plenty of power and responsiveness.

Technical Specifications

• Shell: Custom-molded resin with metal mesh faceplate
• Wax Guard: Integrated stainless steel
• Driver System: Hybrid 8-driver
  • 2x Sonion high & ultra-high balanced armatures
  • 2x Sonion bone conductors
  • 2x Sonion mid-bass balanced armatures
  • 2x Knowles bass & ultra bass balanced armatures
• Impedance: < 35 Ω

Sound Analysis

Soundstage & Imaging

The AGIS II offers a holographic soundstage that feels expansive and layered. It excels in lateral width, creating an enveloping sonic field that doesn’t feel artificial or exaggerated. While vertical height is modest, the sense of dimension is convincing, thanks to the subtle ambient detail and precision imaging driven by the bone conduction drivers.

Bass

The bass is tactile, responsive, and immersive. The Knowles and Sonion drivers work in tandem to produce a low end that is deep without bleeding into the mids. Sub-bass frequencies have physical presence, especially in electronic and pop genres, without ever becoming bloated. The tuning favors clean impact over sheer quantity, making the AGIS II a great pick for bass lovers who still crave balance.

Mids

The midrange is where the AGIS II shows its most musical character. Vocals are pushed forward just enough to be intimate but not cloying, with a rich texture that brings acoustic instruments to life. There’s a subtle warmth here, likely enhanced by the bone conductors, that keeps the mids engaging without losing definition. Detail retrieval is strong, and the layering is handled with restraint and precision.

Treble

Treble is clean, articulate, and generally well-extended. While there's a gentle roll-off in the uppermost registers, it avoids harshness, making it suitable for longer listening sessions. High-frequency elements like cymbals, reverbs, and spatial cues are rendered with finesse, though some air is lost at the very top—most noticeable in orchestral or ambient tracks with prominent upper harmonics.

Final Thoughts

The Noble Audio AGIS II is a compelling blend of technical precision and musical soul. While not perfect—it could benefit from slightly more top-end sparkle or vertical expansion in the soundstage—it remains a standout in its class for its rich bass, well-tuned mids, and immersive design. For those looking for an IEM that feels deliberate, detailed, and versatile, the AGIS II is more than worthy of consideration.

At its price point, the AGIS II is a premium product aimed at listeners who value sonic texture, layering, and design as much as raw analytical detail. It may not be for those chasing absolute neutrality, but it delivers an emotional, precise, and deeply satisfying experience that’s hard to forget.

The Noble Audio AGIS II is available today at Audio46.