NuPrime STA-9X Hi-End Power Amplifier – 2x130W Class A+D Bridgeable to 330W Mono

NuPrime STA-9X is a high-end power amplifier designed to deliver reference-level performance in a compact and elegant chassis. As the evolution of the acclaimed STA-9, it features a hybrid Class A + Class D (ULCAM) architecture, combining musicality, speed, and control.

With 130W per channel into 8 Ohms in stereo mode and the ability to operate in 330W mono bridge mode, the STA-9X offers exceptional flexibility for both stereo and high-performance mono configurations.

The proprietary circuit featuring even-order harmonic generation (H2) enhances tonal richness, delivering a warmer and more natural sound signature similar to Class A or tube amplifiers.

The linear power supply with a high-efficiency toroidal transformer reduces noise and improves low-frequency response, while the high switching frequency of 750 kHz ensures fast, detailed, and precise audio reproduction.

Key Features

• High-end power amplifier with Class A + Class D design
• Power output: 2 x 130W (stereo) / 330W (mono bridge)
• ULCAM (Ultra Linear Class A Module) architecture
• Even-order harmonic circuit for warm, natural sound
• High switching frequency (750 kHz)
• Linear power supply with toroidal transformer
• Selectable RCA and XLR inputs
• 12V trigger input/output for system integration

Technical Specifications

Amplifier Section

• Type: Class A + Class D hybrid
• Stereo power output: 130W x 2 @ 8 Ohms
• Mono power output (bridge): 330W @ 8 Ohms
• Peak power: 170W x 2 / 370W mono

Performance

• Frequency response: 10 Hz – 50 kHz
• THD+N: 0.005%
• Signal-to-noise ratio: >90 dB
• Input impedance: 47 kOhm
• Output impedance: 20 mOhm
• Gain: 28.5 dB

Inputs

• 1 x RCA (unbalanced)
• 1 x XLR (balanced)
• 12V trigger input

Outputs

• Stereo speaker outputs
• Mono (bridge) speaker output
• 12V trigger output

Power Supply

• Linear power supply with toroidal transformer
• Selectable voltage: 115V / 230V

Build & Design

• Aluminum chassis with vibration control
• Proprietary isolation feet
• Compact, high-efficiency design

Dimensions & Weight

• Dimensions (W x H x D): 235 x 55 x 281 mm
• Weight: 4 kg
• Packaging dimensions: 390 x 80 x 360 mm
• Shipping weight: 5 kg

Why Choose NuPrime STA-9X

The NuPrime STA-9X is the ideal choice for audiophiles seeking a compact yet powerful power amplifier capable of delivering precision, dynamics, and flexibility. Its hybrid architecture and bridgeable design make it suitable for both stereo systems and high-performance mono setups.

Perfect when paired with high-end preamplifiers and DACs, it ensures powerful, detailed, and engaging music reproduction in any high-end audio system.