Universal Audio Apollo x4 Gen 2 Thunderbolt 3 Audio Interface with Studio+ Bundle
| Channels of I/O | 12 Inputs / 18 Outputs |
| Maximum Sampling Rate | 192 kHz / 24-Bit |
| Number of Microphone Inputs | 4 |
| Analog Audio I/O | |
| Digital Audio I/O | 1x TOSLINK Optical ADAT / S/PDIF Input (S/MUX Support) 1x TOSLINK Optical ADAT / S/PDIF Output (S/MUX Support) |
| Host Connection | 1x USB-C (Class-Compliant) |
| Power Requirements | AC/DC Power Adapter (Included) |
| Display | 8x Color Multi-Segment LED Meter |
| Channels of I/O | 12 Inputs / 18 Outputs |
| Built-In DSP | Quad-Core |
| Maximum Sampling Rate | 192 kHz / 24-Bit |
| Number of Microphone Inputs | 4 |
| Built-In Microphone | No |
| Input Level Adjustment | 1x Knob |
| Pad | -20 dB |
| Gain/Trim Range | Mic/Line Inputs: +10 to +65 dB |
| High-Pass Filter | 75 Hz |
| Solo/Mute | Mute per Master |
| Analog Audio I/O | 4x Combo XLR-1/4" TRS Balanced Mic/Line Input 2x 1/4" TS Unbalanced Hi-Z Input 4x 1/4" TRS Balanced Line Output 2x 1/4" TRS Headphone Output 2x 1/4" TRS Balanced Monitor Output |
| Phantom Power | 48 V |
| Digital Audio I/O | 1x TOSLINK Optical ADAT / S/PDIF Input (S/MUX Support) 1x TOSLINK Optical ADAT / S/PDIF Output (S/MUX Support) |
| Host Connection | 1x USB-C (Class-Compliant) |
| Host Connection Protocol | Thunderbolt 3 |
| USB (Non-Host) | No |
| Sync I/O | No |
| Network I/O | No |
| MIDI I/O | No |
| Expansion Slots | No |
| Wireless | No |
| Frequency Response | Mic, Line, Hi-Z Inputs: 20 Hz to 20 kHz ±0.05 dB Line Outputs: 20 Hz to 20 kHz 0.05 dB Headphone Outputs: 20 Hz to 20 kHz ±0.01 dB Monitor Outputs: 20 Hz to 20 kHz ±0.04 dB |
| Maximum Input Level | Mic Inputs: 25 dBu (Pad On) Line Inputs: 20.2 dBu (Reference Level at +4 dBu) Hi-Z Inputs: 12.4 dBu (at Minimum Gain) |
| Maximum Output Level | Line Outputs: 20.2 dBu (Reference Level at +4 dBu) 14.5 dBu (Reference Level at -10 dBu) Headphone Outputs: 15.4 dBu (300 Ohms Load) 15.8 dBu (600 Ohms Load) Monitor Outputs: 20.2 dBu |
| Headphone Output Power | 68 mW into 300 Ohms 38 mW into 600 Ohms |
| Impedance | Mic Inputs: 5.4 Kilohms Line/Monitor Outputs: 10 Kilohms Hi-Z Inputs: 1 Megohm |
| Dynamic Range | Hi-Z Inputs: 122 dB (A-Weighted) Line Inputs: 124 dB (A-Weighted) Mic Inputs: 123 dB (A-Weighted) Headphone Outputs: 124 dB (A-Weighted) Line Outputs: 128 dB (A-Weighted) Monitor Outputs: 129 dB (A-Weighted) |
| THD+N | Mic Inputs: -117 dB / 0.00014% Hi-Z Inputs: -111 dB / 0.00028% Line Inputs: -115 dB / 0.00018% Line Outputs: -117 dB / 0.00014% Monitor Outputs: -120 dB / 0.0001% Headphone Outputs: -108 dB / 0.0004% (300 Ohms) -112 dB / 0.00025% (600 Ohms) |
| Sample Rates | Up to 192 kHz |
| Sample Rate Conversion | No |
| Bit Depths | 24-Bit |
| Latency | A/D Conversion: 1.1 ms at 96 kHz |
| Sync Sources | ADAT, Internal, S/PDIF |
| Media/Memory Card Slot | No |
| OS Compatibility | Windows / macOS |
| Mobile Device Compatibility | No |
| Required Hardware | Thunderbolt 3 Port |
| Power Requirements | AC/DC Power Adapter (Included) |
| AC Input Power | 100 to 240 VAC, 50 / 60 Hz (1.2 A) |
| AC/DC Power Adapter | 12 VDC |
| Power Consumption | 19 W |
| Operating Conditions | 32 to 104°F / 0 to 40°C |
| Dimensions | 9.17 x 5.87 x 2.51" / 23.29 x 14.91 x 6.38 cm 9.17 x 6.12 x 2.51" / 23.29 x 15.54 x 6.38 cm (Including Controls and Protrusions) |
| Weight | 3.2 lb / 1.5 kg |
| Package Weight | 5.68 lb |
| Box Dimensions (LxWxH) | 10.5 x 8.8 x 5.2" |
