One25A
Active full range studio monitor
The One25A 3-way studio monitor is the culmination of our 25-year commitment to advanced acoustic design, pure refined signal path, and meticulous craftsmanship – enhanced with the benefits of active design without any of the downsides.
Unique highlights
Industry leading translation
Trusting what you hear builds confidence, ensures better results and raises productivity. Amphion monitoring allows focusing on things that count which saves time and helps meet the ever tightening deadlines.
Pinpoint imaging
Due to their phase coherence and pinpoint imaging, Amphion monitors translate precisely to any playback device, as they allow you to correctly reproduce information in all planes including width, height, and depth.
Simple, refined signal path
Active speakers typically suffer from a lack of resolution due to their complex signal paths. The One25A is free of dynamics and detail-degrading DSP and AD/DA stages, which leads to maximum resolution and performance.
Isolated independent chambers
New midrange and tweeter are in an isolated sealed chamber which minimizes the bass woofer’s negative effects like pressure changes, leading to high midrange and treble resolution ensuring crystal clear transparency.
Acoustic symmetry
The baffle around the midrange is acoustically symmetrical, which leads to smooth frequency curve and precise imaging. Amphions proprietary 5th generation U/D/D improve driver integration and speaker performance in a room.
Removable Amp Pack
Placing the amplifier inside the monitor negatively interferes with moving elements. All the electronics of One25A are housed outside the cabinet in a rigid steel enclosure, which is also removable for soffit mounting.
“In short, they are absolutely phenomenal. The amount of clarity and directness is astounding. Everything I love about my Two18’s plus more.”
Sealed dual cabinet
The internal bracing is designed both as a stiffening support structure as well as a physical energy dispersion filter. At the same time utilizing the mass of the sub-driver and how it is connected to the enclosure and bracing structure to control the resonance of the whole enclosure in a desired way.
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Features
Soffit mounting
Due to our sealed design the One25A is well suited for soffit mounting. The amplifier pack can be detached and separated from the speaker with a rack mountable Amp Pack version.
Boundary control
One25A’s boundary control system allows fine tuning the bass response in eight steps (+/- 7dB measured at 20Hz). The adjustment is a smooth shelf-type curve mostly operating at frequencies below 150Hz.
Protection circuit
One25A houses an overload protection circuitry which is only active when needed. Instead of muting or cutting the signal, the limiting circuitry is designed to keep the workflow undisturbed and music playing.
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Specifications
Active, 3-way, sealed cabinet
1″ titanium tweeter (new)
5¼″ aluminium mid (new)
10″ aluminium bass
100 Hz / 2000 Hz
Tweeter / Midrange 2x 205 W THD + N 0,002%
Bass 700 W
22 – 55 000 Hz (-3dB)
105 dB
Balanced XLR Input, 1x Female XLR, pin 2-hot
230 V / 50 Hz or 115 V / 60 Hz (Factory preset)
316 x 510 x 487 mm
41 kg / 91 lb
Measurements
Frequency response
Boundary control
Because all real control rooms have at least one surface (a floor) the speaker low end (below 100Hz) is measured in half free space. This gives a fairly accurate estimation of a very large control room, with the speaker placed far from back and side walls. As the room size decreases, the amount of bass increases, which means that the smaller speaker models are particularly well suited to smaller rooms which will support the bass response of the speaker. In other words, the plotted frequency response corresponds to the minimum amount of bass you can expect in any control room.
Support materials
