The Amphion FlexBase25 Bass Extension System is designed to give your monitors the low-end depth, punch, and accuracy they deserve. Built to seamlessly integrate with Amphion’s trusted monitoring line, it turns your setup into a true full-range system.
The FlexBase25 isn’t just about adding more low end, it’s about adding balance, control, and truth to your monitoring environment. By integrating seamlessly with your Amphion monitors, it extends your frequency response while maintaining the natural, uncolored sound Amphion is known for. Here at Front End Audio, we’ve found that the FlexBase25 gives engineers and producers that extra dimension of accuracy and detail, making it easier to make confident mixing and mastering decisions.
What we love most about the FlexBase25 is how it doesn’t overwhelm your setup. Instead, it enhances it, adding richness and impact without sacrificing clarity. Whether you’re working on bass-heavy genres or fine-tuning delicate acoustic mixes, the FlexBase25 helps you hear and feel your music in a way that translates beautifully outside the studio. If you already own Amphion studio monitors, upgrading with the FlexBase25 is a natural next step. It transforms a great monitoring system into a truly full-range solution.
Amphion FlexAmp1200 Power Amp
The Amphion FlexAmp1200 is a 700-watt-per-channel stereo power amplifier designed to be the driving force behind the Amphion FlexBase25 Bass Extension System. It provides clean power and features a variable crossover frequency, allowing users to seamlessly integrate the FlexBase25 with various Amphion monitors and third-party speakers to create a full-range, three-way monitoring system.
Amphion FlexBase25 Bass Extension System Features
- Variable crossover frequency for flexible tonal shaping, dial in exactly how much low-end your monitors send to the FlexBase25
- Mono/stereo spread adjustment, so you can preserve stereo integrity even when using higher crossover points
- LFE-channel input with +10 dB sensitivity, for seamless integration into surround and film scoring workflows (with no internal low-pass filtering on LFE)
- Simple and intuitive setup, making it quick to adapt to different room sizes, workflows, or mixing stages
- Bypass capability: switch between full-range 3-way monitoring and the original 2-way monitor signal for midrange-focused listening
- Preserves stereo low-end, unlike conventional mono subwoofers, meaning better mix translation in bass-heavy productions
- Handmade in Finland, upholding precise craftsmanship and design
Amphion FlexBase25 Bass Extension System Specifications
- FlexBase25
- Operating principle: One-way, closed-box, stereo design
- Drivers: Dual 25 cm / 10″ aluminium woofers
- Crossover: Active 4th-order, adjustable between 35–260 Hz
- Max SPL: 117 dB
- Frequency response: Low-pass: 20 Hz – 260 Hz ±3 dB, High-pass: 35 Hz – 200 kHz ±3 dB
- Connectivity: 3.5 m long, terminated with 4-pole Neutrik Speakon connectors
- Dimensions: 33.62″ x 13.39″ x 12.6″
- Weight: 45 kg (99.2 lbs)
- FlexAmp1200
- 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)
- Measurements: 3.46″ x 19″ x 10.25″
- Weight: 6 kg (13.23 lbs)
Amphion FlexBase25 Bass Extension System Includes
- Amphion FlexBase25 Bass Extension System
- FlexAmp1200 Power Amp
- Power Cable
- Speaker Cable
- Owners Manual
- Manufacturer Warranty
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