iD4 MkII
interface_dac
$144
Used market: $85*
Specifications
6 of 12 values have a recorded source- Type
- Audio Interface·
- Ein dBu
- -129✓
- Bus Powered
- yes·
- Max Gain dB
- 58✓
- Analog Inputs
- XLR (Mic), 1/4" TS Instrument (DI)·
- Analog Outputs
- 2x 1/4" TRS Balanced, 1/4" TRS Headphones, 3.5mm Headphones·
- Digital Inputs
- USB-C·
- Min Usb Power W
- 4.5✓
- Headphone Output
- Max Power mW: 100 · Max Voltage Vrms: 5.46 · At Impedance ohms: 600·
- Max Input Level dBu
- 12✓
- Max Sample Rate kHz
- 96·
- Phantom Power Provided
- yes·
Expert Audio Engineering Commentary
Headroom Notes
Audient prints EIN as '129dB A-Weighted' - no minus sign and dB instead of dBu. Read as -129 dBu, the standard form; the sign is missing in their table, not in the measurement.
Gain Staging Advice
58 dB from the 8024 Class A preamp - a middle figure. It runs an SM7B only just, at the top of the knob, and the honest answer for that microphone is a booster or a 69 dB interface.
Amplification Warning
The headphone amplifier is the reason to buy this box: 5.46 V RMS into 600 Ohm, published as a measured voltage rather than a decibel figure. That is more drive than interfaces three times the price, and it will run 250-600 Ohm headphones properly.
Setups using this gear
* Estimated with the depreciation fallback (~59% retained value). · checked on 8/5/2026