Amphion BaseTwo25

Powered low-frequency extension system with 2 x subwoofer towers and 2 x 900W amplifier

SKU: BaseTwo25 Categories: , , , Tags: , ,



Elevate your monitors

The Amphion BaseTwo25 is a state-of-the-art monitoring solution elevating a two-way studio monitor into a full-range, three-way system. The system is driven by BaseAmp1200, which houses Amphion’s discrete filtering module with a 4-step crossover selection, bypass, and variable-level attenuator.

BaseTwo25 is a bass extension system, which transforms a 2-way monitor into a 3-way full-range system. The system consists of a 2U crossover/amplifier unit and two identical, double-sided extenders. Each side of the extender has a long-throw 10” woofer at the top and a matching passive radiator below. For the best possible integration, extenders also act as a monitor stand. Due to the benefits of force cancellation, the extenders remain stable even during the most demanding bass tracks.

BaseTwo25 has four possible crossover settings:

40 Hz, 60 Hz, 80 Hz, and 100 Hz.

For optimal integration, BaseTwo25 creates an additional crossover point and transforms your 2-way monitor into a cohesive 3-way full-range system. BaseTwo25 improves power handling and reduces the intermodulation distortion of the mid-woofers. The best crossover setting depends on the monitor and listening level. The system has a by-pass option for those moments when you want to use your monitors for a narrower midrange view. The by-pass is selectable via a foot switch or a push button on the front plate of the BaseAmp. BaseTwo25 works with all Amphion products, as well as with monitors that have sufficient speed and resolution in the critical upper-bass/lower-mid frequencies.

Technical specifications


Operating principle: One way with passive radiator, stereo
Drivers: 4 x 25 cm / 10” aluminum driver
4 x 25 cm / 10” aluminum radiator
Crossover: Active 4th-order,
selectable @ 40, 60, 80, 100 Hz
Max SPL: 127dB
Frequency Response: 20 – 100 Hz +/-3dB (low pass)
100 Hz – 200 kHz +/-3dB (high pass)
Measurements (W x H x D): 360 x 958 x 386 mm
Weight: 2 x 32 kg / 2 x 93 lb


Output power: 2 x 700W @ 1% THD, 4 Ohm
THD + noise: @ 10W: 0,0025%
@ 100W: 0,0015%
Dynamic range: 127dB (A)
Efficiency: 230V / 50 Hz-700W
Measurements (W x H x D): 483 x 88 x 260 mm
Weight: 6 kg / 13 lb


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