Some 18 months ago i locally purchased a new DGX670.
Reminder: some of you may remember discussing some peculiar specs of this board in the PW thread “ no love for dgx670”. I remember because i read and subsequently analyzed that thread for days on end until i noticed the days had become months. So, yes, this fits the Pianist/Fun/Audio category BUT is also is a snippet’s view of how the simple act of reading a forum post, coupled with a germ seed of …. “curiosity” can lead to …… “might be a gateway to “ (as that old expression goes) deeper involvement beyond curiosity ….. like GAS. A potentially operative clue here is anal’ized ….. many of us remember the slippy theory based on things anal; after all, thats where gas iften exits, no?
Peculiar spec in question: said board has a single 1/4 inch stereo audio output jack mainly intended for attachment to headphones BUT as the manual clearly states as clearly as Chinglish can state “ can be used to send this output to a connected device, such as speaker, recorder or computer”. I viewed several online videos reviewing/demo’ing and saw/heard, repeatedly, this board’s single out port setup with connections to an external amp/system in which the demonstrators went out of their way to not discuss 1) the peculiarity of Yamaha’s design intentions with said single quarter inch audio out 2) how they managed to set up their demo rig that does, somehow, sone way, connect ( to good effect) this jack to an external amp/system. 🤷♂️.
Long story short: within a few weeks of acquiring the 670, i called Sweetwater, talked to a rep, told them what i wanted & why, and they suggested i get a Rolls PM50 monitor/amp, which i did, and happily since then it serves my old school need; a headphone amp - a small, black, metal box with included AC/DC adapter - that includes standard single stereo 1/4 inch plug In, and Out ports, and a dial for adjusting gain, and a status LED, and otherwise no USB this/that/other connections and therefore no need to fool with USB drivers/software, no need to fool with 1/8 or other mini connector hassles.
Between this Amp plus fiddling with various of the internal mixer features (embedded in the 670’s software), i am an old but happy novice pianist playing by internal speakers by day and headphones at night 🙂