NuPrime STA-9X - Stereo and Mono Power Amplifier

The NuPrime STA-9X combines a single-ended Class A input stage with a dual-feedback Class D power stage. Its design draws on the AMG STA, with a 750 kHz switching frequency and a high-efficiency toroidal-transformer linear supply. NuPrime also incorporates even-order harmonic circuitry and proprietary isolation feet.

The amplifier can operate as a stereo unit or be bridged for mono use, allowing a system to be expanded with a second matching amplifier. RCA and balanced XLR inputs accommodate different preamplifiers, and trigger input and output connections support coordinated switching. The input toggle configures the selected connection type; NuPrime instructs users to connect either RCA or XLR, rather than both at once.

Specifications

• Power: 2 × 130 W stereo or 1 × 330 W mono, at 8 and 4 Ω
• Hybrid Class A+D design; bridgeable mono operation
• Switching frequency: 750 kHz
• RCA and XLR inputs; use one connection type at a time
• 12 V trigger input and output
• Input impedance: 47 kΩ
• Dimensions (H × W × D): 55 × 235 × 281 mm
• Weight: 4 kg; Black or Silver