High Performance Class-D Amp


  • Compact and powerful amp
  • Elegant design
  • Ultra efficient
  • Ideal partner for the DAC80 and WDC200

NuForce pioneered ultra efficient, high quality Class-D amplifiers and has been at the forefront of this technology ever since. Continuing this legacy, the STA120 draws on the NuForce Class-D technology, experience and innovation, which have created some of the most acclaimed Class-D power amps available.

Precision Power

The audiophile power supply and large toroidal transformer provide the power needed to precisely drive almost any speakers to satisfying levels, without adding noise or distortion. Its highly efficient design uses less energy and generates less heat and so provides ultra-reliable operation and excellent green credentials.

Compact and Elegant

Enclosed in the same elegant anodized aluminium casing as the NuForce range, this exceptionally compact stereo amp is an ideal partner for the DAC80 digital pre-amp and WDC200 wireless DAC.

Custom Solutions

With its high power, cool running and compact dimensions, the STA120 is ideally placed to function as an audio distribution amplifier, powering in-wall and in-ceiling passive speakers.

Additional information

ColorBlack, Silver
Input Impedance22k Ohm
Connections InputRCA L+R
Connections Output2x five-way speakers posts
Dimensions Depth MM320
Dimensions Height MM50
Dimensions Width MM215
Frequency Response10Hz – 40,000Hz
Output Impedance300m Ohm
Peak Power Output300W
Power Consumption Audio12W
Power Output85W [email protected] Ohm 125W [email protected] Ohm
Power Supply Audio115V-230V
Signal to Noise Ratio115dB
Standard Audio AccessoriesPower cord, User’s manual
Total Harmonic Distortion0.008/%
Unit Weight3.5
  • STA120-M-en-US

  • STA120-DS-en-US

  • STA120-SC--


The ear,
July 13, 2015

“This amplifier is said to prefer a fast, clean and tight loudspeaker so the PMCs should be perfect, in practice it was a remarkably successful combination given the £650 price of the amplifier…It starts and stops with alacrity.”

“My time with this NuForce was brief but very enjoyable and I would repeat it given the chance. In value terms you pay a percentage for the compact size and, it has to be said, superb finish of this discreet amplifier but there is not much competition if you want a small and beautiful power amp so value ratings are tricky. If you want to build a decent system that won’t take over the living room or even the desk top this is one of the better places to start.”

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March 21, 2016

“the STA120 stays on the right side of ‘bright’, and the upper mid detail on offer with the Gold 100 would highlight any brightness with consummate ease. Even with Brahms’ Hungarian Dances [Abbado/Vienna Philharmonic, DG], which are not the kind of music that one might naturally associate with the Gold 100, the DAC80/STA120 combination made those speakers sound truly inspiring.”

“in real life the DAC80 sounds great. And the power amplifier is easy to love, too. Despite those caveats, all in all, this is a great digital combination at a keen price!”

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Audio Test,
April 6, 2016

Small device for big sound – With the digital analog converter Nuforce DAC80 and the class-D amp STA120 Optoma has succeeded in developing an audiophile symbioses. These units fit well together thanks to the space-saving format and discrete design. In terms of sound reproduction, the examines persuade with  great passion on detail and most transparent playback of different resolution, no matter how high/low the volume is set thanks to the 32-bit rotary. Both devices represent a worthwhile purchase.”

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July 8, 2016

Stereoplay test rating: 
Sound: top class
Overall judgment: good – very good
Price/performance: very good

“Precious processing amp with enough energy for challenging speakers. The STA120 is impressive and gives an enjoyable charm to the music…”

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