The UP 2321 is a compact, high-efficiency 320W RMS digital power amplifier designed for professional audio distribution in commercial and public address systems. Built on Class D technology with a switching power supply, it offers exceptional audio clarity with reduced weight and wide bandwidth performance. It includes a Main Input that accepts connections via removable terminal, XLR, or RJ45, and supports both mic and line level signals with phantom power and a high-pass filter for optimized speech transmission. The Main Input can be given priority over the Auxiliary Input, which is designed for music playback through an RCA connector and includes tone and volume control. The amplifier is equipped with both low-impedance (4 ohm) and high-voltage (70V/100V) outputs, ensuring flexible installation options. Additional control features include DIP switch configuration, VOX activation, and GPI compatibility. The UP 2321’s convection cooling, integrated safety protections, and 2U rack-mountable chassis make it a reliable, space-efficient choice for professional installations.
Features
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Full digital 320 W RMS Class D power amplifier
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Mic/line Main Input via removable connector, XLR, or RJ45
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Aux Input with RCA connector and tone/volume controls
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Main Input with high-pass filter and presence control
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Main Input priority over Aux Input
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VOX activation and GPI input
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100 V, 70 V, and 4 Ohm output compatibility
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DIP switch and front panel configuration
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Convection cooling with integrated safety protections
Specifications
| Output Power | 1 x 320 W @ 4 ohm |
| Frequency Response (-3dB) | 50 Hz ÷ 14 kHz |
| Distortion (THD+N) | <0.3 % @ 1 kHz nominal power |
| Total Number of Inputs | 3 |
| Balanced Inputs | 3 |
| Unbalanced Inputs | 2 |
| Mono Inputs | 3 |
| Line Inputs | 1 |
| Line Connectors | RCA |
| Mic+Line Inputs | 1 |
| Mic+Line Connectors | Euroblock, XLR |
| Mic+Line Phantom | 32 V DC |
| VOX | Yes |
| Paging Inputs | 1 |
| Paging Connectors | RJ45 |
| Paging Command | Contact |
| General Purpose Inputs (GPI) | 1 |
| Power Output Connectors | Euroblock |
| Tone Controls | Yes |
| High-Pass Filter | 150 Hz |
| Configuration | DIP switch, Front panel |
| Priority | Yes |
| Cooling | Convection |
| Short Circuit Protection | Yes |
| Thermal Protection | Yes |
| DC Protection | Yes |
| Fuses | Yes |
| Operating Voltage | 220-240/115 V~ 50/60Hz |
| Voltage Selection | Internal |
| Power Consumption (Max) | 600 W |
| Safety Compliance | CE compliant |
| Cabinet/Case Material | Metal |
| Color | Black |
| Rack Mounting | 19″, 2U |
| Height | 88 mm / 3.46 inches |
| Width | 442 mm / 17.4 inches |
| Depth | 230 mm / 9.06 inches |
| Weight | 6.76 kg / 14.9 lbs |
| Package Height | 200 mm / 7.87 inches |
| Package Width | 330 mm / 12.99 inches |
| Package Depth | 500 mm / 19.69 inches |
| Package Weight | 7.8 kg / 17.2 lbs |
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