Amphion BaseTWO25 Stereo Bass Extension System

Amphion ONE12 The Amphion ONE12 is a reference-grade passive 2-way nearfield monitor designed for accurate monitoring in professional studio and post-production environments. Built by Amphion Loudspeakers, it combines a compact form factor with exceptional sonic accuracy and translation. The design features a 1″ titanium tweeter integrated into a Corian waveguide and a 4.5″ aluminum woofer. Thanks to its low crossover point and precise time and phase alignment, the monitor delivers highly coherent dispersion and extremely stable stereo imaging. A rear passive radiator ensures controlled low-frequency performance without the drawbacks of traditional bass reflex systems, making the monitor reliable even in acoustically challenging spaces. Sound Character The Amphion ONE12 delivers an extremely neutral, transparent and precise sound. Its stereo image is highly stable, with a strong phantom center and accurate three-dimensional depth. Low frequencies are tight and controlled, while mids and highs remain natural and uncolored. Even at low listening levels, full detail is preserved—ideal for long, fatigue-free sessions. Highlights ✔ passive 2-way nearfield reference monitor ✔ 1″ titanium tweeter with Corian waveguide ✔ 4.5″ aluminum woofer ✔ excellent time and phase coherence ✔ outstanding stereo imaging and depth ✔ passive radiator for controlled low-end ✔ excellent translation to other systems ✔ consistent performance at low listening levels ✔ compact design for smaller studios ✔ handcrafted in Finland Typical Applications ✔ mixing and mastering ✔ post-production and broadcast ✔ nearfield positions in immersive setups ✔ mobile studios and edit suites ✔ reference monitoring in difficult rooms Technical Specifications ✔ device type: passive 2-way nearfield monitor ✔ tweeter: 1″ titanium ✔ woofer: 4.5″ aluminum ✔ frequency response: approx. 78 Hz – 20 kHz (±3 dB) ✔ crossover: 1600 Hz ✔ impedance: 8 ohms ✔ recommended power: 20 – 100 W ✔ sensitivity: approx. 84 dB ✔ weight: approx. 6 kg per speaker ✔ design: passive radiator

Amphion TWO18 The Amphion TWO18 is a reference-grade passive 2-way studio monitor designed for midfield and main monitoring applications in professional studios. As the flagship model of the Amphion Two series, it delivers maximum output, extended low-end response and exceptional spatial accuracy. Unlike the One series, the TWO18 features dual 6.5″ aluminum woofers and dual passive radiators, combined with a 1″ titanium tweeter and Corian waveguide. This design provides a wider frequency range, higher output capability and extremely stable imaging—ideal for larger rooms and demanding production environments. Its precise time and phase alignment ensures coherent “point-source” behavior with accurate imaging and consistent performance across the full frequency spectrum. Sound Character The Amphion TWO18 delivers a powerful, extended and tightly controlled low-end while maintaining exceptional clarity and neutrality. Despite its size, the sound remains highly precise. Low frequencies are deep and impactful, mids are clear and detailed, and highs are open and natural. The stereo image is wide, stable and three-dimensional with a broad sweet spot. Even at high listening levels, the sound stays clean and distortion-free, making it ideal for professional mixing and mastering. Highlights ✔ passive 2-way midfield/main studio monitor ✔ 1″ titanium tweeter with Corian waveguide ✔ 2 × 6.5″ aluminum woofers ✔ dual passive radiators for extended low-end ✔ excellent time and phase coherence ✔ high output capability and headroom ✔ large, stable stereo imaging ✔ wide sweet spot for flexible monitoring ✔ excellent translation to other systems ✔ handcrafted in Finland Typical Applications ✔ midfield and main monitoring ✔ high-end mixing and mastering ✔ larger control rooms and studios ✔ Dolby Atmos and immersive setups ✔ bass-intensive productions (electronic, film, hip-hop) Technical Specifications ✔ device type: passive 2-way studio monitor ✔ tweeter: 1″ titanium ✔ woofers: 2 × 6.5″ aluminum ✔ design: dual passive radiators ✔ impedance: 4 ohms ✔ recommended power: approx. 100 – 300 W ✔ format: midfield / main monitor

Amphion TWO18X The Amphion TWO18X is the next-generation evolution of the TWO18, designed for midfield and main monitoring applications. Developed by Amphion Loudspeakers, it combines the proven acoustic platform with an upgraded high-frequency section and redesigned crossover for maximum precision and resolution. Its 2-way design features an enhanced 1″ titanium tweeter with Corian waveguide and dual 6.5″ aluminum woofers in a D’Appolito configuration. Dual passive radiators extend the low-frequency response while maintaining tight and controlled bass. The new crossover design reduces distortion, improves transient response and enhances spatial accuracy. Precise time and phase alignment preserves Amphion’s signature point-source behavior, even at high listening levels and longer distances. Sound Character The Amphion TWO18X delivers a powerful, extended and highly detailed sound with exceptional control. Low frequencies are deep and precisely defined, while the midrange is focused and highly detailed. Highs are open, refined and low in distortion. The stereo image is large, stable and three-dimensional with excellent depth. Even at high SPL levels, the sound remains clean and transparent, making it ideal for critical mixing and mastering applications. Highlights ✔ next-generation passive 2-way midfield/main monitor ✔ upgraded 1″ titanium tweeter with Corian waveguide ✔ 2 × 6.5″ aluminum woofers (D’Appolito design) ✔ dual passive radiators for extended low-end ✔ newly optimized crossover for maximum precision ✔ excellent time and phase coherence ✔ point-source dispersion behavior ✔ high output capability and headroom ✔ large, stable stereo imaging ✔ handcrafted in Finland Typical Applications ✔ midfield and main monitoring ✔ high-end mixing and mastering ✔ larger control rooms and studios ✔ Dolby Atmos and immersive setups ✔ productions requiring extended low-end Technical Specifications ✔ device type: passive 2-way studio monitor ✔ tweeter: 1″ titanium (updated design) ✔ woofers: 2 × 6.5″ aluminum ✔ design: dual passive radiators ✔ impedance: 4 ohms ✔ recommended power: approx. 100 – 350 W ✔ format: midfield / main monitor

Amphion ONE15 The Amphion ONE15 is a reference-grade passive 2-way nearfield monitor designed for accurate monitoring in professional studio and post-production environments. Manufactured by Amphion Loudspeakers, it offers extended low-frequency response compared to the ONE12 while maintaining the same precision and translation accuracy. The design features a 1″ titanium tweeter integrated into a Corian waveguide and a 5.25″ aluminum woofer. With its low crossover point and precise time and phase alignment, the monitor delivers highly coherent dispersion with accurate imaging and a stable stereo field. A rear passive radiator ensures controlled bass reproduction without the drawbacks of traditional bass reflex designs, allowing consistent performance even in acoustically challenging rooms. Sound Character The Amphion ONE15 delivers a neutral, transparent and highly precise sound with extended low-end compared to smaller models. The bass is deeper yet tightly controlled, while mids and highs remain clear, open and uncolored. Stereo imaging is stable and three-dimensional, allowing fine details and spatial information to be accurately perceived. Even at low listening levels, tonal balance is preserved, enabling long and fatigue-free working sessions. Highlights ✔ passive 2-way nearfield reference monitor ✔ 1″ titanium tweeter with Corian waveguide ✔ 5.25″ aluminum woofer ✔ excellent time and phase coherence ✔ extended low-end compared to ONE12 ✔ passive radiator for controlled bass response ✔ outstanding stereo imaging and depth ✔ excellent translation to other systems ✔ consistent performance at low listening levels ✔ handcrafted in Finland Typical Applications ✔ mixing and mastering ✔ post-production and broadcast ✔ nearfield and midfield monitoring ✔ immersive audio setups ✔ reference monitoring in professional studios Technical Specifications ✔ device type: passive 2-way nearfield monitor ✔ tweeter: 1″ titanium ✔ woofer: 5.25″ aluminum ✔ frequency response: approx. 49 Hz – 20 kHz (±3 dB) ✔ crossover: 1600 Hz ✔ impedance: 8 ohms ✔ recommended power: 50 – 150 W ✔ sensitivity: approx. 85 dB ✔ weight: approx. 8 kg per speaker ✔ design: passive radiator

Amphion TWO15 The Amphion TWO15 is a reference-grade passive 2-way nearfield monitor designed for precise monitoring at short listening distances. As part of the Two series by Amphion Loudspeakers, it combines extended low-end performance with exceptional transparency, making it ideal for professional mixing and mastering environments. Its D’Appolito configuration features dual 5.25″ aluminum woofers and a central 1″ titanium tweeter integrated into a Corian waveguide. This design ensures precise phase coherence, controlled dispersion and highly stable stereo imaging. Two rear passive radiators extend the low-frequency response while maintaining tight and controlled bass without the drawbacks of bass reflex systems. This allows accurate performance even when placed close to walls. Sound Character The Amphion TWO15 delivers an extremely neutral, detailed and honest sound. Transients are reproduced quickly and accurately, while the low-end remains deep yet controlled. The midrange is clear and uncolored, and the highs are open and precise. A standout feature is its ability to reveal fine spatial details without masking the overall mix, ensuring excellent translation across playback systems. Highlights ✔ passive 2-way nearfield monitor (D’Appolito design) ✔ 1″ titanium tweeter with Corian waveguide ✔ 2 × 5.25″ aluminum woofers ✔ dual passive radiators for extended low-end ✔ excellent time and phase coherence ✔ high transient accuracy and detail resolution ✔ highly stable stereo imaging and depth ✔ suitable for near-wall placement ✔ excellent translation to other systems ✔ handcrafted in Finland Typical Applications ✔ mixing and mastering ✔ high-end nearfield monitoring ✔ small to medium-sized control rooms ✔ post-production and broadcast ✔ productions requiring extended low-end without a subwoofer Technical Specifications ✔ device type: passive 2-way nearfield monitor ✔ tweeter: 1″ titanium ✔ woofers: 2 × 5.25″ aluminum ✔ frequency response: approx. 44 Hz – 20 kHz (±3 dB) ✔ crossover: 1600 Hz ✔ impedance: 8 ohms ✔ sensitivity: approx. 86 dB ✔ recommended power: 50 – 200 W ✔ weight: approx. 12 kg per speaker ✔ design: sealed enclosure with passive radiators

Amphion ONE18 The Amphion ONE18 is a reference-grade passive 2-way nearfield monitor and one of the most versatile models in the Amphion lineup. Designed by Amphion Loudspeakers, it combines high precision with musicality, making it suitable for a wide range of professional studio applications. Its design features a 1″ titanium tweeter integrated into a Corian waveguide and a 6.5″ aluminum woofer. With a low crossover point and precise time and phase alignment, the monitor delivers coherent dispersion with pinpoint imaging and a stable stereo field. A rear passive radiator provides controlled low-frequency extension without the drawbacks of traditional bass reflex designs, ensuring consistent performance across different room environments. Sound Character The Amphion ONE18 delivers a neutral, open and highly detailed sound with strong musicality. Its response is precise yet pleasant, allowing long listening sessions without fatigue. Low frequencies are deep and controlled, while mids and highs remain clear and natural. A standout feature is its exceptional stereo imaging with accurate depth and a wide sweet spot, enabling reliable monitoring even outside the ideal listening position. Highlights ✔ passive 2-way nearfield reference monitor ✔ 1″ titanium tweeter with Corian waveguide ✔ 6.5″ aluminum woofer ✔ excellent time and phase coherence (point-source behavior) ✔ highly accurate stereo imaging ✔ wide sweet spot for flexible monitoring ✔ passive radiator for controlled low-end extension ✔ natural, fatigue-free sound signature ✔ excellent translation to other systems ✔ handcrafted in Finland Typical Applications ✔ mixing and mastering ✔ music production and recording ✔ post-production and broadcast ✔ nearfield and midfield monitoring ✔ reference monitoring in professional studios Technical Specifications ✔ device type: passive 2-way nearfield monitor ✔ tweeter: 1″ titanium ✔ woofer: 6.5″ aluminum ✔ frequency response: approx. 45 Hz – 20 kHz (±3 dB) ✔ crossover: 1600 Hz ✔ impedance: 8 ohms ✔ design: passive radiator ✔ weight: approx. 12 kg per speaker

Amphion ONE18X The Amphion ONE18X is the next-generation evolution of the acclaimed ONE18, representing Amphion’s latest reference-grade nearfield monitor design. Developed by Amphion Loudspeakers, it combines proven acoustic principles with a newly engineered tweeter and crossover for enhanced precision and resolution. Its 2-way design features a 1″ titanium tweeter, a 6.5″ aluminum woofer and a passive radiator. The redesigned crossover and upgraded tweeter deliver improved transient response, lower distortion and more accurate spatial imaging. With its low crossover point of 1.6 kHz and precise time and phase alignment, the ONE18X maintains Amphion’s signature point-source behavior, ensuring highly coherent sound reproduction. Sound Character The Amphion ONE18X delivers an extremely precise, neutral and highly detailed sound with enhanced clarity compared to its predecessor. Low frequencies are deep and controlled, the midrange is highly focused and detailed, and the highs are open, smooth and low in distortion. Stereo imaging is exceptionally stable with precise depth and a wide sweet spot. Overall, the ONE18X offers a more refined and analytical yet musical presentation—ideal for critical mixing and mastering decisions. Highlights ✔ next-generation passive 2-way nearfield monitor ✔ upgraded 1″ titanium tweeter with ultra-low distortion ✔ newly optimized crossover design ✔ 6.5″ aluminum woofer ✔ passive radiator for controlled low-end ✔ excellent time and phase coherence ✔ point-source dispersion for precise imaging ✔ exceptional detail and transient accuracy ✔ wide sweet spot for flexible monitoring ✔ handcrafted in Finland Typical Applications ✔ reference-level mixing and mastering ✔ high-end nearfield monitoring ✔ immersive audio setups (Dolby Atmos etc.) ✔ post-production and critical listening ✔ studios requiring maximum translation accuracy Technical Specifications ✔ device type: passive 2-way nearfield monitor ✔ tweeter: 1″ titanium (updated design) ✔ woofer: 6.5″ aluminum ✔ frequency response: approx. 45 Hz – 55 kHz (±3 dB) ✔ crossover: 1600 Hz ✔ impedance: 8 ohms ✔ sensitivity: approx. 85 dB ✔ recommended power: 100 – 350 W ✔ weight: approx. 10 kg per speaker ✔ design: passive radiator, sealed concept