Audio Research SP 9 MKII repaired and restored with Mundorf caps - YouTube
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Audio Research SP9 MKII Tube / Solid State Hybrid Preamp with Phono In – SkyFi Audio
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AUDIO-RESEARCH SP9 PREAMPLIFIER Service Manual download, schematics, eeprom, repair info for electronics experts
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Preamplifier SP9 Ampl/Mixer Audio Research, Plymouth, build | Radiomuseum
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Audio Research SP9 MKII Tube / Solid State Hybrid Preamp with Phono In – SkyFi Audio
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Audio Research SP-9 Preamplifier
Preamplifier SP9 Ampl/Mixer Audio Research, Plymouth, build | Radiomuseum
.jpg.2cd7bfdf63a868753926c7f10ca71b3b.jpg "FS: Audio Research SP9 + various NOS tubes included | Stereo, Home Cinema, Headphones Components")