Amphion FlexBase25
The FlexBase25 brings deep, stereo bass extension to Amphion monitor systems, combining dual 10-inch aluminium drivers, a sealed enclosure and 117dB capability for authoritative low-end reach. Its adjustable crossover, level and mono-stereo spread let studios tailor the foundation from writing to mastering; StereoNET United Kingdom highlights its flexible, easy-to-place single-box design.
WATT RECOMMENDS
Save your favorites. Compare them anytime.
Create a free HiFi Hub account to save products to your Wishlist and compare your favorites side by side.
Nicely Roasted
Sound Quality
91/100
Integration
78/100
Build Quality
92/100
Features Connectivity
88/100
Value for Money
75/100
Pros
Highly adjustable stereo bass-management system with crossover, level and mono-stereo spread controls.
Single-box format is described as easy to place and simple to set up between main monitors.
Designed to integrate with Amphion monitors for full-range monitoring in smaller rooms or larger facilities.
WATT RECOMMENDS
Save your favorites. Compare them anytime.
Create a free HiFi Hub account to save products to your Wishlist and compare your favorites side by side.
SOUND QUALITY PERFORMANCE 91/100
Bass
92/100
Dual 10" aluminium drivers in a sealed one-way design with a claimed 20 Hz – 260 Hz ±3 dB response and 117 dB max SPL indicate very strong low-frequency extension and control for a compact sealed design. Score is based on specifications (20 Hz extension, high power amp) rather than review comparisons to larger reference subs.
Dynamics
90/100
FlexAmp1200 specs (700 W per channel @ 1% THD+N, very low THD at 10/100 W and 127 dB A-weighted dynamic range) and sealed drivers imply strong transient control, headroom and low distortion, supporting high dynamics in both music and HT use.
Assessments of Build Quality, Usability, and Overall Propositions.
Integration
78/100
Active 4th-order crossover (35–260 Hz), stereo operation and Speakon wiring give excellent tools for integration, but no listening/outcome reviews were provided. Features ≠ Integration; add outcome evidence or lower Integration.
Build Quality
92/100
Handmade in Finland, heavy 45 kg cabinet and aluminium drivers suggest premium construction and rigidity. Score derives from build materials and manufacturing notes rather than independent durability reports.
Features Connectivity
88/100
Active crossover, dedicated FlexAmp1200 (PFC, standby modes, high dynamic range), and 4-pole Neutrik Speakon connections are professional-grade and flexible for placement and stereo operation. Lacks mention of app control or wireless; connection approach is pro-focused.
Value for Money
75/100
Price not provided and no reviewer price/value statements; given premium build, serious amplifier and claimed performance, it likely sits at a high price point—value score cautious due to lack of pricing and user-review evidence.
Reviews & Sources
Professional reviews and sources for this product's Watt'n Potatoes analysis.
Online Reviews & Mentions
YouTube Reviews
No reviews found yet
Forum Mentions
No forum mentions found yet
Specifications
- FlexBase25 - Operating principle
- One way closed box, stereo
- FlexBase25 - Drivers
- 2 x 25 cm / 10” aluminium
- FlexBase25 - Crossover
- Active 4th-order @ 35-260 Hz
- FlexBase25 - Max SPL
- 117dB
- FlexBase25 - Frequency response
- 20 Hz – 260 Hz +/-3dB (low pass) 35 Hz – 200 kHz +/-3dB (high pass)
- FlexBase25 - Connection
- 3.5 m long, terminated with 4-pole Neutrik Speakon connectors
- FlexBase25 - MeasurementsH x W x D
- 854 x 340 x 320 mm 33.62″ x 13.39″ x 12.6″
- FlexBase25 - Weight
- 45 kg (99.2 lbs)
- Specification
- FlexBase25 - Handmade in Finland
- FlexAmp1200 - Output power
- 1 % THD+N, 20 Hz – 20 kHz 700 W (4 Ω) per channel
- FlexAmp1200 - THD+ noise
- @ 10W: 0,0025% (100 Hz) @ 100W: 0,0015% (100 Hz)
- FlexAmp1200 - Dynamic range
- 127 dB (A) weighted
- FlexAmp1200 - Efficiency
- 230 V / 50 Hz – 700 W 120 V / 60 Hz – 670 W 100 V / 50 Hz – 460 W
- FlexAmp1200 - Mains
- Universal mains including Power Factor Correction (100 – 240 V, 50 – 60 Hz) 35 Hz – 200 kHz +/-3dB (high pass)
- FlexAmp1200 - Stand-by mode
- ErP (1275/2008/EC), Energy Star® v3.0 compliant
- FlexAmp1200 - MeasurementsH x W x D
- 88 x 483 x 260 mm 3.46″ x 19″ x 10.25″ Rubber feet add 10 mm / 0.4″ to height if used
- FlexAmp1200 - Weight
- 6 kg (13.23 lbs)
- Specification
- FlexAmp1200 - Assembled in Finland
Manufacturer's Description — Amphion
To new heights…
FlexBase25 is a single box, stereo bass system, which transforms a two-way studio monitor into a full range, three-way system. The system comes with FlexAmp1200 with wide adjustment possibilities allowing to address the needs of a rapidly changing landscape of modern sound-making.
Unique highlights
Stereo to the lowest octave
Amphion’s introduced their first Base Extension system in 2015. The concept of keeping stereo information all the way down has become widely adopted since.
Seamless integration
Designed to work seamlessly with all monitor sizes. System can even be paired with a smaller model for an ultra-fast, easy to adjust small room full-range system.
Elevate your monitors
As the bass frequencies are transferred to the Base system, the midrange clarity and power-handling of the paired monitors are greatly enhanced.
Modern flexibility
Variable crossover frequency and bass level attenuator allow the system to match the specific needs of various sound engineering tasks.
Simple setup
Always placed on the center-line of the monitors. Fixed placement and wide adjustment possibilities lead into effortless performance in all rooms.
2-way, 3-way or Amphion way?
Simplicity of a 2-way monitor or the power handling of a 3-way design? The system can easily switch between both with a push of a button or foot switch.
Verified Dealers
Online Dealers
All Dealers
Zoom out the map to see more dealers
Authorized dealers for Amphion FlexBase25
- 110Hz — online and in-store — Kielce, Województwo świętokrzyskie, Poland (website)
- Acton Gate Audio — online and in-store — Cymru, United Kingdom (website)
- Alen Audio — in-store — Extramurs, Comunidad Valenciana, Spain (website)
- All Elite Audio — online and in-store — Perry Hall, Maryland, United States (website)
- Alma Music & Audio — online and in-store — San Diego, California, United States (website)
- Alpha High End — online and in-store — Brasschaat, Vlaams Gewest, Belgium (website)
- Audio Magic - EU — online and in-store — Wola, Województwo mazowieckie, Poland (website)
- Audio Vision San Francisco — online and in-store — San Francisco, California, United States (website)
- Audiocompagniet — online and in-store — Odense C, Denmark (website)
- audioconcept — in-store — Frei-Laubersheim, Rheinland-Pfalz, Germany (website)
and 38 more verified dealers