Product Overview

The Ultimate Expression of Active Design

The One25A is engineered for those who require full-bandwidth monitoring in a compact, manageable footprint. Unlike traditional active monitors that often sacrifice transparency for power, the One25A uses a minimalistic active crossover—a natural progression from the filters found in Amphion’s acclaimed Base systems. This design avoids the pitfalls of complex DSP, maintaining a pure signal path that results in the highest level of immediacy, resolution, and emotional transfer.

Product Description

Acoustic Isolation and Clarity:

The One25A features an innovative dual-enclosure system. The midrange driver and tweeter are housed in their own isolated chamber, completely separate from the hexagonal bass enclosure. This eliminates acoustic cross-coupling and internal standing waves, ensuring that the heavy pressure changes from the 10" woofer do not interfere with the delicate midrange and high-frequency reproduction.

Powerful, Precision Engineering:

• Unprecedented Headroom: With a massive 700W dedicated to the bass and 2 x 205W for the mid/highs, the One25A delivers a total of over 1100W of power. This ensures effortless dynamics and clean playback even at high SPLs (up to 112 dB).

• U/D/D Technology: The 5th generation of Amphion’s Uniformly Directive Diffusion waveguide creates a wide, stable sweet spot and minimizes room reflections, making it easier to achieve a perfect mix in diverse acoustic environments.

• External "Amp Pack": To ensure longevity and maximum performance, the electronics are located on the outside of the cabinet. This prevents vibration from affecting the circuits and provides superior ventilation, while also making the monitors ideal for soffit-mounting.

Surgical Accuracy and Musicality:

The crossover point between the woofer and midrange is set at an unusually low 100 Hz. This allows the 10" driver to function essentially as an integrated subwoofer, while the 5.25" midrange handles the bulk of the musical information with incredible speed and detail. The result is a monitor that is "brutally honest" for mixing but deeply enjoyable for creative work.

Key Features

• Active 3-Way Design: Integrated amplification tailored for maximum driver control.

• True Full Range Performance: Impressive frequency response of 22 Hz – 55 kHz.

• Isolated Sealed Dual Cabinets: Eliminates standing waves and acoustic interference.

• 10" High-Excursion Woofer: Delivers rich, impactful, and precise low-end energy.

• Mastering-Grade Active Crossover: Simple, elegant signal path for superior transparency.

• External Amp Packs: Optimized for cooling, serviceability, and soffit-mount applications.

• Handmade in Finland: Built to the highest standards of professional audio engineering.

Technical Specifications

What’s Included in the Box

• 1 x Amphion One25A Active Monitor (Sold as single or pair)

• 1 x External Amp Pack (Attached)

• 1 x Power Cable

• 1 x Owner's Manual