Amphion Amp100-Mono Power Amplifer


100W mono amplifier for mobile rigs and small studios with Amphion One12, One15, and One18 passive monitors

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SKU: AMPAMP100MONO Categories: , Brand:

The Amphion Amp100-mono is a wide bandwidth, ultra low distortion, 100W power amplifier custom-built for mobile rigs and small studios equipped with Amphion One12, One15, and One18 passive studio monitors

The Amphion Amp100-mono amplifier is a single-channel, lightweight power amp designed for mobile rigs, space-challenged studios, or as a power source for the center channel of an Amphion 5.1 system comprising Amphion One12, One15, or One18 monitors. Likes its stereo counterpart, the Amp100-mono also features Marten’s patented adaptive modulation servo amplifier technology, which provides wide bandwidth, ultra low distortion, and high power output. With accurate resolution across the frequency spectrum, a dynamic range of 115dB, and 100 watts into 8 ohms, the Amphion Amp100-mono is hand-crafted to critical specs, using nothing but the finest components. It features one Neutrik XLR input, two-pole Speakon binding post speaker connector, and an input voltage auto select between 115V and 230V for international use. Weighing in at a mere 1.7 lbs., the Amp100-mono packs a tremendous amount of high-quality power.

Amphion Amp100-mono amplifier in one take:

  • 100-watt mono power amp
  • Super light-weight (1.7 lb./0.8kg)
  • 1 x Neutrik XLR input, 2-pole Speakon binding post
  • 115dB dynamic range for plenty of headroom
  • Auto input voltage select (115V/230V)
  • Handmade in Finland to exacting specifications

Advantages of passive monitors and external amps

While self-powered studio monitors have come to the forefront, due to convenience and budgetary considerations for the home or project studio, they come with trade-offs. There are several advantages to using passive monitors with an external power amp. For starters, the power amp is external, which means no electrical noise will be interfering with speaker components. Usually, to keep costs down, cheaper components are used in in self-powered monitors to keep costs down. Space becomes an issue as well.

Building an amp into a cabinet requires some gymnastics to avoid compromising the cabinet’s acoustics, plus, the amp components have to fit into a small space. As such, manufacturers tend to use lighter amps to keep the monitor’s weight from being unmanageable. In passive systems, higher quality components can be used for both power amp and monitor, with far less compromise to the design of either thanks to the additional space. In short, the requirements of building a monitor don’t place unnecessary demands on the design of the power amp, and vice versa.

Handmade in Finland to exacting specifications

 Amphion comprises a small, dedicated team of highly skilled craftsmen and technicians who are passionate about music and sound. All Amphion monitors and amplifiers are meticulously hand-built to impeccable standards, with high specs and tolerances. The result is a range of high-end monitors that enable audio professionals to focus on the mix, not the sound of the speaker.

Who’s using Amphion?

Among the growing list of mixers, engineers, sound editors, and composers taken with the Amphion sound, are pro audio luminaries such as Dave Pensado, Jacquire King, multiple Grammy winner Dave Reitzas, BAFTA award-winning composer, Jasper Kyd, and the legendary Bruce Swedien, engineer and mixer of the world’s best-selling album, Michael Jackson’s Thriller (which, by the way, was recorded right here at our very own Westlake Studios).

For mobile rigs, small studios, or a 5.1 center channel, the Amp100-mono combined with an Amphion One12, One15, or One18 passive monitor makes the perfect power couple. For more information, call or chat online with your Westlake Pro sales consultant today.


Amphion Amp100-mono Amplifier specifications:

  •  Power: 1x100W into 8 ohm @ 1% THD;
  • Amp technology: Patented AMS (adaptive modulation servo) amplifier technology
  • Load-independent frequency range: 100kHz (-3dB)
  • THD vs. frequency: Almost flat
  • Dynamic range: 115dB
  • Output impedance: <10M ohm 20Hz – 20kHz
  • Mains: Automatic voltage doubler for universal use (115/230V)
  • Certification: CE, EuP, and Energy Star
  • 2U High-quality aluminum rackmount chassis with front-panel power switch
  • Connectors: 1x Neutrik XLR input; 1 x Neutrik Speakon binding post
  • Dimensions (W x H x D): 4-13/32″ x 1-23/32″ x 7-7/8″ (112 x 44 x 200 mm)
  • Weight: 1.7 lb. (0.8 kg)

Additional information

Weight 0.8 lbs
Dimensions 200 x 44 x 112 in
Frequency Response

100kHz load-independent (-3dB)







Rack Spaces




Watts Per Side

50W (at 4 ohms)


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