英國Musical Fidelity「又」復刻經典「煎蛋」A1

英國著名的高保真音響製造商Musical Fidelity，再次重現其標誌性的Class A A1合併擴音機。這款經典的擴音機首次在1980年代推出，現在已經用現代化的改進重新設計，同時保留了其原始的魅力和設計。

在High End 2023展示的A1擴音機的2023版本，基於原始電路但使用了優質的組件。它保持了純Class A的操作，以其無失真的性能和溫暖、詳細、音樂性的聲音而聞名。儘管體積小巧，但擴音機有效地散熱，這是Class A擴音機的常見挑戰。

A1擴音機在8歐姆負載下提供25W的純Class A功率，最大輸出為25A。它具有一個新的、更高效的“雙單聲道分裂軌”變壓器，具有完全獨立的左右電源供應，以實現更好的電源處理和立體聲成像。每個功率放大器現在都有雙倍的供應容量，從而減少了紋波和噪聲。

前級放大器的電路與1988年的原始設計相同，並且從改進的、完全平滑和調節的電源供應中獲得了很大的好處。在前級階段增加了一個新的“直通”開關，可以完全繞過音量控制前的增益塊，導致大約減少10dB的增益。這個功能在處理現代或高輸出數字源時特別有利。

A1還包括一個離散的電流模式輸入階段，用於最低噪聲放大MC和MM唱頭。低噪聲電流至電壓轉換階段用於進一步放大和RIAA均衡。對選定的MC輸入進行自動輸入阻抗匹配，並增加增益，增強了A1的唱頭放大器階段的通用性。

Musical Fidelity的Class A A1合併擴音機，保留了原始的1988年的外觀和電路，並進行了現代化的改進，預計將在2023年夏季上市。

官網：https://www.musicalfidelity.com/products/a1/a1-2

Musical Fidelity, the esteemed British hi-fi manufacturer, has once again brought back its iconic A1 Integrated Class A Amplifier. This classic amplifier, first launched in the 1980s, has been re-engineered with modern enhancements while preserving its original charm and design.

The 2023 version of the A1 amplifier, unveiled at the High End 2023, is based on the original circuits but with superior components. It retains the pure Class A operation, renowned for its distortion-free performance and warm, detailed, and musical sound. Despite its compact size, the amplifier effectively dissipates heat, a common challenge with Class A amplifiers.

The A1 amplifier delivers 25W of pure Class A power at an 8-ohm load with a maximum output of 25A. It features a new, more efficient “dual mono split rail” transformer, with fully independent left and right power supplies for better power handling and stereo imaging. Each power amplifier now has double supply capacity, resulting in reduced ripple and noise.

The preamplifier circuitry is the same as the original 1988 design and greatly benefits from the improved, fully smoothed, and regulated power supplies. A new “direct” switch has been added at the preamp stage, allowing the gain block before the volume control to be completely bypassed, resulting in roughly 10dB less gain. This feature is particularly advantageous when working with modern or high-output digital sources.

The A1 also includes a discrete current-mode input stage for the lowest noise amplification of MC and MM cartridges. A low noise current to voltage conversion stage is used for further amplification and RIAA equalization. Automatic input impedance matching for the selected MC input, along with increased gain, enhances the versatility of the A1’s phono stage.

The A1 Integrated Class A Amplifier from Musical Fidelity, retaining the original 1988 appearance and circuits with modern improvements, is expected to be available in the summer of 2023.

Official website: https://www.musicalfidelity.com/products/a1/a1-2

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Remarks: The information and images in this news article are sourced from the internet. The content of the article was generated by ChatGPT and edited by Kin Chan.