S300 Stereo Amplifier from CNET/the Audiophiliac 2018 Review of the Stellar Gain Cell DAC/Preamplifier and M700 Mono Amplifiers from AudioStream 2018 Review of the DirectStream DAC with Snowmass OS from Audiophilia 2018 Review of Sprout100 from The Absolute Sound Magazine 2018 Review of Sprout100 with Elac Speakers from Twittering Machines 2018 Review of Power Plant 20 from Stereophile Magazine 2019 Review of Power Plant 15 from Tone Audio 2019 Review of Power Plant 12 from Stereophile Magazine External links Audio amplifier manufacturers Compact Disc player manufacturers Audio equipment manufacturers of the United States Manufacturing companies based in Colorado