Amphion FlexBase25 subwoofer including FlexAmp 1200

FlexBase25 is a compact, single-box stereo bass system that transforms any two-way studio monitor into a full-range, three-way system. Paired with the FlexAmp1200, it offers extensive tuning options to adapt to the ever-evolving needs of modern sound production.

Key Features
True Stereo to the Lowest Octave
Since Amphion introduced its first Base Extension system in 2015, the concept of maintaining stereo imaging down to the lowest frequencies has become an industry standard.

Seamless Integration
Designed to complement all monitor sizes, FlexBase25 can even be paired with smaller models for a quick and effective full-range setup in compact rooms.

Enhanced Monitor Performance
By shifting bass frequencies to the Base system, your monitors gain improved midrange clarity and greater power-handling capabilities.

Adaptable to Any Workflow
With variable crossover frequency and bass level attenuation, the system easily adapts to different sound engineering tasks.

Effortless Setup
Placed along the centerline of your monitors, its fixed positioning and broad adjustment options ensure reliable performance in any room.

PSU works on 100-240V, power cord included.

US and EU parcels ship via UPS, ETA 1-7 working days from pickup day zero. That also applies to most locations worldwide.

All shipments are fully insured.

Bigger shipments requiring pallets or custom made crates ship to US, CA, JP, CN, AU and other outside of EU locations via DHL Air Freight, ETA is normally approx. 7-14 working days from pickup day zero.

Big shipments inside EU ship via different freight companies, recently mostly via ACE Logistics. Freight forwarders can use different courier companies for deliveries to final destinations.

Palletising and crating time can vary depending on the size of the shipment and packaging queue. We pack all our shipments with great care.

You are most welcome to pick your order up yourself from our Retrosonic Pro Audio showroom, studio and warehouse in Tallinn, Estonia.

We ship worldwide – contact us for a personal shipping quote or any other questions.

VAT (Value Added Tax) can be deducted if you have a company with a valid EU VAT number or if you're based outside of the EU. Non-EU buyers pay all and any import tax and duty as regulated by their local customs.