The Quad 303 is a Class AB power amplifier that combines its retro aesthetic with modern performance and stability. Thanks to the triples output stage, it delivers a clean, precise and musically warm reproduction that impresses at both low and high volumes. The controlled bass reproduction, clear mids and detailed highs create a balanced sound.

至於 303 後級，Peter Walker 的創新技術 — 三重輸出電路，仍然是新版 Quad 303 的核心。 三重輸出電路是當年晶體擴大機的突破設計，它在擴大機內形成一個負回授放大器，具有優異的熱穩定性，因此輸出電流幾乎不受溫度波動的影響，並具有相對更低的失真。

Quad’s 303 is a superb British amplifier and one of the best classic amplifier deals around when properly reconditioned, matched, and set-up. How much longer will prices be this low?

2024年12月2日 · 今年，Quad以最新的電路設計讓33與303復刻登場，為其注入嶄新技術迎像未來。 1960年代經典韻味與古典美學重現. 這是1967年所推出的Quad 33前級與303後級擴大機的外觀模樣，紮實又耐看且視覺辨識度極高。 今年最新復刻推出的Quad 33前級與303後級擴大機，與近60年前的經典原作對比，可以發現外型延續經典但有更多現代風貌，也將外觀色調調整為更富科技感的「消光銀」，Quad 33前級體型基本相近，但303後級則適度加高、加深以容納更充沛的 …

2024年12月24日 · Quad 303 Performance Report. Straight, load-independent, and wideband frequency response, measured at 8, 4, and 2 Ω load. Distortion components vs. power: very low distortion; k2 (red) is the relatively strongest distortion component; THD+N at 1 W: 0.005%. Signal-to-noise ratio RCA/XLR at 10 V: 108/103 dB, or bridged 101/97 dB.

2021年5月30日 · With modest service requirements needing to be addressed only after decades of use, the 54-year-old QUAD 303 power amplifier and its matching 33 control preamplifier are two of the most elegant hi-fi bargains to ever play music.

2024年10月18日 · After showing prototypes at Munich High-End 2024, QUAD has formally announced the rebirth of two iconic products: the 33 pre-amplifier and 303 power amplifier. First released in 1967, the originals landed as all-transistor designs in a world dominated by tube amplifiers and with an industrial design that would eventually earn them a place in ...

2024年12月17日 · The Quad 33/303 are a pre and power amplifier combination and they occupy a market segment that is - for a variety of reasons we’ll cover in due course - slowly coming back around to the idea of splitting amplification into two boxes and we have tested the formidable Leema Acoustics Neutron and Graviton as a sort of proof of concept on AVForums.

1967年，quad推出了公司历史上第一套 晶体管放大器 —— quad 303 功率放大器。 这套放大器引入了一种新的“ 三级输出级 ”设计，将当时晶体管元件普遍存在的热不稳定性完全消除。