Amphion FlexBase25

SKU: FlexBase25

FlexBase25 LF extension tower and FlexAmp1200 crossover/ amplifier module


About this item




To new heights…

The Amphion 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 its 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. The 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 to an effortless performance in all rooms.

2-way, 3-way, or Amphion way?

The 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.



Operating principle: One-way closed box, stereo
Drivers: 2 x 25 cm / 10” aluminium
Crossover: Active 4th-order @ 35-260 Hz
Max SPL: 117dB
Frequency response: 20 Hz – 260 Hz +/-3dB (low pass)
35 Hz – 200 kHz +/-3dB (high pass)
Connection: 3.5 m long, terminated with 4-pole Neutrik Speakon connectors
Weight: 45 kg / 99 lb
Handmade in Finland


Output power: 1 % THD+N, 20 Hz – 20 kHz 700 W (4 Ω) per channel
THD+ noise: @ 10W: 0,0025% (100 Hz)
                        @ 100W: 0,0015% (100 Hz)
Dynamic range: 127 dB (A) weighted
Efficiency: 230 V / 50 Hz – 700 W
120 V / 60 Hz – 670 W
100 V / 50 Hz – 460 W
Mains: Universal mains including Power Factor Correction (100 – 240 V, 50 – 60 Hz)35 Hz – 200 kHz +/-3dB (high pass)
Stand-by mode: ErP (1275/2008/EC), Energy Star® v3.0 compliant
Measurements: 483 x 88 x 260 mm
Weight: 6 kg / 13 lb
Assembled in Finland


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