Hidizs
S9 Pro Plus Martha
interface_dac
$66
Used market: $40*
Specifications
4 of 11 values have a recorded source- Type
- Dongle Adapter·
- Bus Powered
- yes·
- Max Gain dB
- 0·
- Analog Inputs
- ·
- Analog Outputs
- 3.5mm Headphones, 4.4mm Balanced Headphones·
- Digital Inputs
- USB-C·
- Min Usb Power W
- 2.5✓
- Headphone Output
- Max Power mW: 138 · Max Voltage Vrms: 2.1 · At Impedance ohms: 32·
- Max Sample Rate kHz
- 768·
- Phantom Power Provided
- no·
- Updated At
- 2026-08-04T23:30:58.309Z·
Expert Audio Engineering Commentary
Headroom Notes
Successor to the S9 Pro, which Hidizs no longer sells; the older model used a 2.5 mm balanced jack, this one a 4.4 mm. Power is quoted only at 32 ohms, so the voltage here is derived from that single point and says nothing about how the device behaves into 300 ohms. No output impedance is published.
Setups using this gear
* Estimated with the depreciation fallback (~61% retained value). · checked on 8/5/2026