Refer-Naim Fully Discrete Class A MM Phono Amplifier Finished Board, RIAA Equalization Turntable Preamplifier for Vinyl Record Players, Hi-Fi Audio Preamp 24VAC Power Compatibility

Elevate Your Vinyl Experience with the Naim-Style Fully Discrete Class A MM Phono PreampFor vinyl enthusiasts, the phono preamp is the soul of your turntable system. This fully discrete Class A phono amplifier board, inspired by the classic Naim RIAA circuit, is designed to deliver the warm, detailed, and natural analog sound that vinyl lovers crave.Why Choose This Phono Preamp? 1.Pure Class A Operation: Unlike Class AB designs, this preamp operates in pure Class A, ensuring zero crossover distortion, smooth signal transmission, and a warm, musical sound signature that brings your vinyl records to life. 2.Fully Discrete Circuit: No integrated op-amps, all signal paths use discrete transistors (BC550C/BC560C/2SK2700), achieving higher linearity, lower noise, and better dynamic range than op-amp-based preamps. 3.Precise RIAA Equalization: The circuit strictly follows the RIAA standard, accurately compensating for the frequency response of vinyl records, ensuring that every note, from deep bass to crisp treble, is reproduced with perfect fidelity. 4.Premium Component Selection: We only use high-quality audio-grade components: WIMA film capacitors for signal coupling, NICHICON/Rubycon electrolytic capacitors for power supply filtering, 1% precision metal film resistors for stable gain, and a dedicated heat sink for reliable long-term use.Ready-to-Use Finished Board: The board is fully pre-soldered and tested, so you don’t need to handle complex DIY soldering. Just connect your turntable, power supply, and amplifier, and enjoy high-fidelity vinyl sound immediately.Perfect for All Vinyl Enthusiasts Whether you’re a casual listener looking to upgrade your entry-level turntable, or an audiophile building a custom high-end system, this phono preamp is the perfect choice. It’s also ideal for DIY audio hobbyists who want to build their own custom preamp enclosure.Specifications at a Glance Circuit Type: Fully Discrete Class A, Naim-Style RIAA Equalization Input Type: Moving Magnet (MM) Phono Cartridge Power Requirement: AC22~26V, I≥0.1A (Recommended: 24VAC@1A, Transformer NOT Included) PCB Size: 131×101×1.6mm, 1oz Copper, HASL with Lead Key Components: ONSEMI BC550C/BC560C Transistors, 2SK2700, WIMA/NICHICON/Rubycon Capacitors, 1% Metal Film Resistors Elevate Your Vinyl Experience with the Naim-Style Fully Discrete Class A MM Phono PreampFor vinyl enthusiasts, the phono preamp is the soul of your turntable system. This fully discrete Class A phono amplifier board, inspired by the classic Naim RIAA circuit, is designed to deliver the warm, detailed, and natural analog sound that vinyl lovers crave.Why Choose This Phono Preamp? 1.Pure Class A Operation: Unlike Class AB designs, this preamp operates in pure Class A, ensuring zero crossover distortion, smooth signal transmission, and a warm, musical sound signature that brings your vinyl records to life. 2.Fully Discrete Circuit: No integrated op-amps, all signal paths use discrete transistors (BC550C/BC560C/2SK2700), achieving higher linearity, lower noise, and better dynamic range than op-amp-based preamps. 3.Precise RIAA Equalization: The circuit strictly follows the RIAA standard, accurately compensating for the frequency response of vinyl records, ensuring that every note, from deep bass to crisp treble, is reproduced with perfect fidelity. 4.Premium Component Selection: We only use high-quality audio-grade components: WIMA film capacitors for signal coupling, NICHICON/Rubycon electrolytic capacitors for power supply filtering, 1% precision metal film resistors for stable gain, and a dedicated heat sink for reliable long-term use.Ready-to-Use Finished Board: The board is fully pre-soldered and tested, so you don’t need to handle complex DIY soldering. Just connect your turntable, power supply, and amplifier, and enjoy high-fidelity vinyl sound immediately.Perfect for All Vinyl Enthusiasts Whether you’re a casual listener looking to upgrade your entry-level turntable, or an audiophile building a custom high-end system, this phono preamp is the perfect choice. It’s also ideal for DIY audio hobbyists who want to build their own custom preamp enclosure.Specifications at a Glance Circuit Type: Fully Discrete Class A, Naim-Style RIAA Equalization Input Type: Moving Magnet (MM) Phono Cartridge Power Requirement: AC22~26V, I≥0.1A (Recommended: 24VAC@1A, Transformer NOT Included) PCB Size: 131×101×1.6mm, 1oz Copper, HASL with Lead Key Components: ONSEMI BC550C/BC560C Transistors, 2SK2700, WIMA/NICHICON/Rubycon Capacitors, 1% Metal Film Resistors

• Fully Discrete Class A Design, Authentic Naim-Style Hi-Fi Sound: This finished phono preamp board adopts a fully discrete component design, strictly following the classic Naim RIAA equalization circuit topology. Powered by pure Class A operation, it delivers ultra-low distortion, warm and natural analog sound, perfectly restoring the texture and detail of vinyl records, bringing you a lossless listening experience close to the original recording.
• Dedicated MM Phono Stage, Professional RIAA Equalization: Specifically designed for moving magnet (MM) turntables, this preamp features a precise RIAA equalization curve that accurately compensates for the frequency response of vinyl records. It amplifies the weak signal from the phono cartridge to line level, eliminating noise and interference, making it an ideal upgrade for entry-level to high-end vinyl systems.
• High-Quality Components, Stable & Reliable Performance: Built with premium electronic components: NICHICON/Rubycon electrolytic capacitors, WIMA film capacitors, BC550C/BC560C transistors, 2SK2700, and 1% metal film resistors. The 1oz copper HASL PCB ensures excellent heat dissipation and signal stability, with a dedicated heat sink for long-term reliable operation.
• Easy Installation & Wide Compatibility: The pre-soldered finished board eliminates complex DIY assembly, ready to use directly. Compatible with 22-26V AC power input (recommended 24VAC@1A, transformer not included), it fits most standard turntable setups, record players, and home audio systems, perfect for audiophiles and DIY audio enthusiasts.
• Compact & Professional PCB Design: The PCB measures 131×101×1.6mm with a compact layout, suitable for DIY audio enclosures and custom projects. It comes with all necessary terminals and mounting holes, making it easy to integrate into your existing hi-fi system, whether for home use or professional audio modification.