This FPGA sees DX170 overachieve by supplying its CS43131s the same pure I2S as iBasso's bigger DX240 and DX320 siblings, pushing down DAC phase noise and jitter for a stable decode.
After decoding, iBasso's generous use of negative feedback quashes distortion and claims up to 130dB of signal-to-noise ratio.
The employment of this feedback also sees DX170 achieve massive bandwidth that's effectively flat 10Hz to 40Khz. That means phase reproduction in the audible human hearing region is stellar, for realistic reproduction of dynamics and natural transparency – a triumph of iBasso's entry-level music player.
The quality of DX170's signal will translate to nearly everything you choose to drive from its balanced 4.4mm output, or 3.5mm.
Powerful output buffers supply current and mean iBasso's wonderkid promises high damping factor while maintaining its low distortion into low impedances typical of IEMs, Focals, Fostexs and Rosson Audio Designs.
Still the closed-loop internal gain remaining after the application of negative feedback around DX170's op-amp IC analog circuit remains high. So where she really shines is in swinging voltage, opening up the sound of any high-impedance Audio-Technica, Sennheiser and ZMF Headphones while barely breaking sweat.
On the go, DX170 will see you retain so much of what defines iBasso's reference DAPs. You'll want to get your music aboard via your favourite streaming apps.
And their future-proof Android 11 software will mean Google Play Store app support of Tidal, Spotify and Apple Music for years to come. Backed by a SOC processor that has posted AnTuTu scores in excess of 100,000, that's one more sign of smooth daily operation ensuring you'll never part from your DX170.
That is, unless you move up to one of iBasso's bigger reference cousin's here, or one of our other music players here...
SOC Rockchip RK3566
DAC 2x Cirrus Logic CS43131
Frequency Response 10Hz - 40kHz (+/-0.15dB)
SNR 125dB (3.5mm SE), 130dB (4.4mm BAL)
THD+N (3.5mm SE) 0.0004% (no load, 2Vrms), 0.0007% (32Ohm load, 2Vrms)
THD+N (4.4mm BAL) 0.00022% (no load, 3Vrms), 0.00022% (32Ohm load, 3Vrms)
Dynamic Range -115dB (3.5mm SE), -113dB (4.4mm BAL)
Output Power 3.2Vrms (3.5mm SE), 6.4Vrms (4.4mm BAL)