Primo Plus is Volumio’s advanced streaming DAC, combining a dual-mono ESS architecture with an upgraded power supply and precision clocking. It uses the ES9039Q2M DAC together with eight selectable filters and a switchable NOS mode. The unit offers USB-C, USB-A, optical and coaxial connectivity, as well as balanced XLR and unbalanced RCA outputs. Hardware gain control also allows Primo Plus to operate directly as a preamplifier for a power amplifier.
| SPECIFICATIONS | |
|---|---|
| DAC | ESS Sabre ES9039Q2M |
| Supported Resolution | Up to PCM 768 kHz / 32 bit and DSD512 |
| USB-C Input | Up to PCM 768 kHz / 32 bit and DSD512 |
| USB Output | Up to PCM 1536 kHz / 32 bit and DSD1024 |
| S/PDIF Coaxial Output | Up to PCM 192 kHz / 24 bit |
| S/PDIF Optical Output | Up to PCM 192 kHz / 24 bit |
| Analog Balanced Output | 1.00, 1.55, 2.00, 3.00, 4.00, 5.00, 6.00, 6.30 Vrms |
| Analog Unbalanced Output | 0.50, 0.775, 1.00, 1.50, 2.00, 2.50, 3.00, 3.15 Vrms |
| Analog Output Impedance | ≈140Ω |
| USB | 1× USB-C device | 2× USB-A host |
| Video Output | HDMI up to 4K / 60 fps |
| LAN | Gigabit 10/100/1000M |
| Wireless | Wi-Fi 802.11a/b/g/n/ac, 2.4G and 5G |
| Bluetooth | 5.0 |
| CPU | Cortex-A72, Quad Core 1.5 GHz |
| RAM | 2 GB LPDDR4 |
| Internal Storage | 16 GB eMMC |
| Display | 1.3” OLED display |
| Power | 5 V DC / 3 A |
| Dimensions | 27 × 15 × 5 cm |
| Weight | 2.25 kg |
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