Short answer
Both are portable players, $179 against $209.
The Shanling M1 Plus reaches 100 dB on 564 of the 567 models here, the Hidizs AP80 Pro Max on 556.
| Specification | Hidizs AP80 Pro Max | Shanling M1 Plus |
|---|---|---|
| Power into 32Ω | 70 mW | 195 mW |
| Power into 150Ω | 15 mW | 42 mW |
| Power into 300Ω | 7.5 mW | 21 mW |
| Power into 600Ω | 3.7 mW | 10 mW |
| Output impedance | not published | 0.6 Ω |
| Output noise | not published | not published |
| Price | $179 | $209 |
| Headphones it reaches 100 dB on out of 567 | 556 | 564 |
Not published means the maker leaves it out, so that axis cannot be compared.
| Balanced | Hidizs AP80 Pro Max | Shanling M1 Plus |
|---|---|---|
| Socket | 4.4mm | 4.4mm |
| Power into 32Ω | 190 mW | 660 mW |
| Power into 300Ω | 20 mW derived | 70 mW derived |
| Output impedance | not published | 1.2 Ω |
| Output noise | not published | not published |
| Headphones it reaches 100 dB on out of 567 | 564 | 566 |
Through the balanced sockets the Shanling M1 Plus reaches 100 dB on 566 of the 567 models here and the Hidizs AP80 Pro Max on 564. Derived figures are worked out from the loads the maker did publish.
| As published | Hidizs AP80 Pro Max | Shanling M1 Plus |
|---|---|---|
| DAC | Dual ESS ES9219C | ESS ES9069Q |
| Processor | X1600E | Ingenic X2000 |
| Operating system | HiByOS | MTouch (Shanling's own system) |
| Storage | microSD up to 2 TB (internal storage not stated) | microSD card slot (internal storage not stated) |
| Outputs | 3.5 mm SE (70 mW + 70 mW @ 32 Ω), 4.4 mm balanced (190 mW + 190 mW @ 32 Ω) | 3.5 mm single-ended, 4.4 mm balanced, USB-C; 3.5 mm coaxial S/PDIF out |
| Bluetooth | Bidirectional Bluetooth 5.1: LDAC, aptX, AAC, SBC, UAT | Bluetooth 5.2, bidirectional: LDAC, aptX HD, aptX, AAC |
| Wi-Fi | 2.4 GHz Wi-Fi (Tidal, Qobuz, DLNA, AirPlay) | 2.4 / 5 GHz, DLNA, AirPlay, OTA updates |
| Formats | PCM 32bit/384kHz, native DSD256 | PCM 32 bit / 768 kHz, DSD512 |
| Screen | 2.95-inch, 360 x 640, touchscreen | 3.2-inch, 320 x 480, touchscreen |
| Battery | 1300 mAh | 2100 mAh |
| Battery life | Up to 12 h continuous playback (no test condition given) | Up to 12.5 h (no test condition given) |
| Weight | not published | 116 g |
| Dimensions | 3.25 x 2.00 x 0.62 in (published in inches only) | 86 x 61 x 17 mm |
Copied from the makers’ own pages: hidizs.net/products/hidizs-ap80-pro-max-all-in-one-hi-res-streaming-music-player, en.shanling.com/article-IntroM1Plus.html. Battery life is the maker’s own test figure.
| Load | Hidizs AP80 Pro Max | Shanling M1 Plus |
|---|---|---|
| 32 Ω | Published | Published |
| 150 Ω | Derived | Derived |
| 300 Ω | Derived | Derived |
| 600 Ω | Derived | Derived |
Both makers publish a power rating. Hidizs AP80 Pro Max publishes at 32 Ω; Shanling M1 Plus at 32 Ω. The other rows are worked out from those.
The two publish at the same loads, which is the one case where the rows of this table can be read straight across.
8 headphones reach 100 dB on the Shanling M1 Plus but not on the Hidizs AP80 Pro Max — HiFiMAN Susvara, Moondrop COSMO, Moondrop PARA 2, 5 more.
556 of the 567 models here reach 100 dB on both.
Headroom is at a 100 dB SPL peak.
The widest gap on the list is the Audio-Technica ATH-R70X: Shanling M1 Plus has +9 dB of headroom there against +5 dB. 4 dB is about 2.8 times the power, which matters for peaks rather than for how loud the music sits.
The hiss columns are empty for Hidizs AP80 Pro Max and Shanling M1 Plus because neither maker publishes no output noise figure.
| Headphone | Impedance | Needs | Hidizs AP80 Pro Max headroom | Shanling M1 Plus headroom | Hidizs AP80 Pro Max hiss | Shanling M1 Plus hiss |
|---|---|---|---|---|---|---|
| Shure SE846 | 9 Ω | 0.04 mW | +27 dB | +31 dB | not published | not published |
| Campfire Audio Andromeda 2020 | 9 Ω | 4.0 mW | +7 dB | +11 dB | not published | not published |
| Audeze LCD-2 Classic | 70 Ω | 0.79 mW | +16 dB | +21 dB | not published | not published |
| Beyerdynamic DT 1990 Pro (250Ω) | 250 Ω | 0.63 mW | +12 dB | +16 dB | not published | not published |
| HiFiMAN HE400se | 25 Ω | 7.9 mW | +8 dB | +13 dB | not published | not published |
| Audio-Technica ATH-R70X | 470 Ω | 1.6 mW | +5 dB | +9 dB | not published | not published |
| Sennheiser HD 600 | 300 Ω | 6.6 mW | +1 dB | +5 dB | not published | not published |
| HiFiMAN Susvara | 60 Ω | 50 mW | -1 dB | +3 dB | not published | not published |
The Shanling M1 Plus costs $30 more than the Hidizs AP80 Pro Max. Out of the 567 models here, that difference buys 8 more models driven to 100 dB.
Nothing runs the other way: there is no axis here on which the cheaper of the two does better.
Only published figures count here; blank axes are counted separately.
Each in full: Hidizs AP80 Pro Max and Shanling M1 Plus.