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The Virtus I4S is a foundation line integrated amplifier featuring a built-in phono stage and headphone output.
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| Amplifier Class | AB |
| Stereo Output Power | 2 x 120 W / 4 Ω 2 x 75 W / 8 Ω |
| Headphone Unbalanced Output | 580 mW / 30 Ω 190 mW / 300 Ω |
| Gain | 35.5 dB |
| Input Sensitivity | 380 mV |
| Gain Phono | MM 40 dB MM 46 dB MC 60 dB MC 66 dB |
| Damping Factor at 1 kHz | 160 / 4 Ω 330 / 8 Ω |
| Frequency Range | 20 – 20 000 Hz / < -0.2 dB |
| Input Impedance | RCA: 50 kΩ XLR: 100 kΩ |
| Analog Inputs | 1 pair RCA (Phono) 2 pairs RCA 1 pair XLR |
| Analog Output (Variable Out) | 1 pair RCA |
| Headphone Output | 6.3 mm jack |
| Total Harmonic Distortion | < 0.005 % / 1 kHz, 5 W |
| Signal-to-noise ratio | > 90 dB |
| Trigger Connectors (12 V) | 1 x IN (3.5 mm jack) 1 x OUT (3.5 mm jack) |
| Power | 230 V / 50-60 Hz / 620 VA |
| Dimensions (W x H x D) | 430 x 75 x 310 mm |
| Weight (Net) | 12 kg |
| Weight (Gross) | 14 kg |