DX1
interface_dac
$99
Used market: $60*
Specifications
4 of 10 values have a recorded source- Type
- DAC/Amp Combo·
- Bus Powered
- yes·
- Max Gain dB
- 0·
- Analog Inputs
- ·
- Analog Outputs
- 6.35mm Headphones, 3.5mm Headphones, RCA Line Out·
- Digital Inputs
- USB·
- Min Usb Power W
- 2.5✓
- Headphone Output
- Max Power mW: 280 · Max Voltage Vrms: 3.89 · At Impedance ohms: 32 · Output Impedance ohms: 0.7·
- Max Sample Rate kHz
- 384·
- Phantom Power Provided
- no·
Expert Audio Engineering Commentary
Headroom Notes
Topping publishes its specifications as images rather than text, but the numbers themselves are unusually complete: output level in Vpp for each gain setting, output impedance, and power at three loads. 11 Vpp at high gain is 3.89 V RMS and agrees with the 51 mW into 300 ohms rating to within half a percent.
Gain Staging Advice
The RCA line output has a 22-ohm source impedance — fine for any modern amplifier with a 10 kilohm input, but worth remembering if you feed something vintage with a low input impedance. The 12 dB high-gain figure is measured from digital full scale to the jack, not from an analogue input; the DX1 has no analogue input.
* Estimated with the depreciation fallback (~61% retained value). · checked on 8/5/2026