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.
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.
Enclosed in the same elegant anodised 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.
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.
Proprietary negative feedback circuitry operates as the cornerstone of this D-class amp’s sound quality. A self-resonant design, the 400 kHz PWM switching frequency constantly adjusts to the input signal, output current demands, and loudspeaker impedance variations. Incredible speed and accuracy ensure that the most explosive dynamics and the minutest of details convey the kind of life-like sound upon which the NuForce reputation rests.
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…"
“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.”
“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!”
“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.”