Apollo x4 Hardware Manual 32
ANALOG I/O
Microphone Inputs 1 – 4
Frequency Response 20 Hz – 20 kHz, ±0.05 dB
Dynamic Range 123 dB (A–weighted)
Total Harmonic Distortion + Noise -115 dB (1 kHz @ -1 dBFS)
Maximum Input Level (PAD on) 25.6 dBu
Default Input Impedance 5.5K Ohms (variable via Unison plug-ins)
Gain Range +10 dB to +65 dB
Pad Attenuation (switchable per input) 20 dB (variable via Unison plug-ins)
Phantom Power +48V (switchable per mic input)
Connector Type XLR Female, pin 2 positive (Combo XLR/TRS)
Hi-Z Inputs 1 & 2
Frequency Response 20 Hz – 20 kHz, ±0.05 dB
Dynamic Range 122 dB (A–weighted)
Total Harmonic Distortion + Noise -108 dB (1 kHz @ -1 dBFS)
Maximum Input Level (at minimum gain) 12.2 dBu
Default Input Impedance 1M Ohms (variable via Unison plug-ins)
Gain Range +10 dB to +65 dB
Connector Type ¼” Female TS Unbalanced
Line Inputs 1 – 4
Frequency Response 20 Hz – 20 kHz, ±0.05 dB
Dynamic Range 122 dB (A–weighted)
Total Harmonic Distortion + Noise -114 dB (1 kHz @ -1 dBFS)
Maximum Input Level (at minimum gain) 20.2 dBu
Input Impedance 5K Ohms
Gain Range +10 dB to +65 dB
Connector Type ¼” Female TRS Balanced
Line Outputs 1 – 4
Frequency Response 20 Hz – 20 kHz, ±0.05 dB
Dynamic Range 127 dB (A–weighted)
Total Harmonic Distortion + Noise -117 dB (1 kHz @ -1 dBFS)
Maximum Output Level 20.2 dBu
Output Impedance 100 Ohms
Connector Type ¼” Female TRS Balanced
Monitor Outputs L & R
Frequency Response 20 Hz – 20 kHz, ±0.1 dB
Dynamic Range 127 dB (A–weighted)
Total Harmonic Distortion + Noise -116 dB
Maximum Output Level 20.2 dBu
Output Impedance 100 Ohms
Connector Type ¼” Female TRS Balanced
Stereo Headphone Output
Frequency Response 20 Hz – 20 kHz, ±0.1 dB
Dynamic Range 124 dB (A–weighted)
Total Harmonic Distortion + Noise -98 dB (1 kHz @ -1 dBFS)
Maximum Output Power (into 300 ohm load) 96 mW RMS
Connector Type ¼” Female TRS Stereo
(continued)
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