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Amphion FlexBase25
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.
Dealers selling Amphion near you
The FlexBase25 brings controlled low-frequency extension and nimble transient response, turning two-way monitors into full-range systems with a flexible, adjustable stereo spread. Its variable 35–260Hz crossover and easy setup suit writing, mixing and smaller control rooms, and earned early praise from Jay Garrett for practical versatility and show-room impact.
Pros
- Extensive tuning: variable crossover (35–260 Hz) and mono–stereo spread let engineers tailor low-end integration for different tasks.
- Converts two-way monitors into full-range systems, providing deep, controlled bass without needing separate multi-box setups.
- Practical placement and setup: designed to sit on the centre line or behind the console, making it suitable for small studios and larger rooms alike.
Sound Quality
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.
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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.
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