Amphion Announces BaseTwo25 Low-Frequency Extension Monitoring System 

Amphion Loudspeakers has announced its new flagship BaseTwo25 Low-Frequency Extension System, a no-compromise, turnkey system that transforms any Amphion two-way studio monitor into a full range, perfectly integrated time and phase accurate, three-way tower.

Amphion, a Finnish manufacturer, said the new system extends all the way down to 10Hz corner frequency (-3dB). Each of the two BaseTwo25 towers features 10-inch woofers with 9.8 inch passive radiators mounted on either side of an enclosure measuring 40 x 7.5 x 14-inches.



The system is driven by two 900 watt outboard monoblock amplifiers, and controlled by a filtering module with variable volume control. More than adding low frequencies below a single fixed frequency point, the BaseTwo25 system significantly increases the coupled monitor’s midrange power-handling abilities by gradually transferring low-end frequencies.

Steep filtering is avoided so as to keep phase characteristics as correct as possible. The Base system’s unique filter module begins transferring energy from the mains to the Base towers at 400Hz (-36dB), employing a gentle third order filter to gradually increase the energy-exchange to the Bases until an equally shared transfer is achieved at 100Hz and below.

A by-pass switch also allows top speakers to be used independently of the complete system for a full-range presentation.



BaseOne25 sells for $12,500. The first production units are expected to ship from Q2 2018.

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