: Later versions like the HM-901S upgraded from the original's plastic casing to a more durable CNC aluminum alloy for better heat dissipation. Comparison: HM-901 vs. HM-901S CNC Aluminum Alloy ~3 seconds ("Instant On") DSD Support DSD Support Native Support Volume Control Stepped Attenuator Volume Control Improved Stepped Potentiometer
: Utilizes two ES9018 chips (one per channel) to achieve high detail separation and a wider soundstage. hm 901 buy
: Smaller variants like the HM-901U have been seen in specialized listings for as low as $86.25 from niche merchants like Motif Cables , though availability can fluctuate rapidly. Key Feature Breakdown : Later versions like the HM-901S upgraded from
: Designed specifically for sensitive in-ear monitors with lower noise floors. hm 901 buy