Audiophilepure

https://www.stereophile.com/content/dan-dagostino-master-audio-systems-momentum-hd-line-preamplifier

“Sticking with Shostakovich, Rickie Lee Jones, and Cassandra Wilson, we switched preamps and discovered that the contrast between the D’Agostino Momentum HD and the Audio Research Ref 6 was profound. While timbres were actually more neutral through the Ref 6 and air was quite fine, highs were noisier, midrange less full, and bass less astounding albeit excellent in its own right. On Yello’s “Electrified II” from Toy (24/48 WAV, Polydor 4782160/ HDtracks) and will.i.am’s “#thatPOWER” (featuring Justin Bieber) from #willpower (16/44.1 MQA.FLAC, Interscope Records UICS-9136/7), the Ref 6 preamp couldn’t deliver the same degree of bass impact, midrange fullness, extended evenness on top, and wall-to-wall sound as the Momentum HD. Which isn’t surprising, given the $25,000 price difference. With the Ref 6, my system still sounded like the system I knew inside out; with the Momentum HD, a new window opened, and every recording became a source of wonder.