The SP9 Hybrid Stereo Preamplifier represents a further evolution of the innovative electronic design first embodied in the widely acclaimed Audio Research SP11 Stereo Preamplifier. The SP9 is not a "stripped-down" version of the SP11, but rather represents an adaptation of some of the SP11's patented hybrid technology to a simpler, more ...

1995年11月29日 · Following the introduction of their very expensive, tube/FET hybrid SP11 preamplifier, there were rumors that Audio Research was working on a hybrid tube/transistor preamplifier targeted to cost less than $2000. The rumors were confirmed when ARC showed a black-and-white photo of the SP9 at the 1987 Winter CES.

Vintage Audio Research SP9 Mk III, High-definition, audiophile-quality, hybrid (Two 6922/6DJ8 dual triodes & FET's) Preamplifier. This Audio Research SP9 MKIII is an all original (blackface) factory MKIII.

The SP9 was a solid-state hybrid developed with minimal noise and great durability in mind, despite its early tube designs. The limited life of tubes was one of the arguments offered by solid-state aficionados in the 1980s for not running valve amplifiers, yet the SP9 could be used for up to 10,000 hours before needing replacement.

2011年6月8日 · 這台SP9早年故障無聲所以物主便放著生灰塵 , SP-9的設計非常優秀以及穩定 , 全機只使用2顆電解電容 , 至少省掉不少電解老化的更換麻煩 , 雖只用到2顆電解電容但全機的訊噪比非常高 , 還包含MM管晶混合唱頭放大 , 真是買中古也是撿便宜因SP-9也碰過幾次 , 大概抓... (發燒 …

The ARC SP-9 has long been one of the most desirable, and for good reason. Turntable ready, this preamp delivers surgically clean signal through ARC's hybrid FET/Tube audio circuit and solid-state power supply.

Using just two 6DJ8 vacuum tubes (one in the phono section and one in the high-level stage) in intermediary gain stages, the SP9 expresses the musicality and natural "rightness" vacuum-tube preamplifiers have been noted for, yet it does so with the quickness and dynamic vigor of the best solid-state designs.

The hybrid SP9 Mk.II uses two 6DJ8 tubes, one in the phono stage and one in the line section, each ringed with tube dampers, like the solitary 6DJ8 in the ARC SP14. The SP9 Mk.II is a revision of the original SP9 introduced in the Summer of 1987, embodying what Audio Research calls a group of 14 different improvements.

2001年11月19日 · In the late 1980's I bought the first version of the ARC SP-9, and it was the first really "serious" preamp I owned. What a MAJOR disappointment it proved to be. After all the glowing reviews of this preamp in the major audio journals, I really expected a significant improvement in my system.