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Audio Research SP9 MKII Tube / Solid State Hybrid Preamp With Phono Input
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Standard Tube Set for Audio Research Reference 10
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Standard Tube Set for Audio Research GS150
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Audio Research SP-6 Tube Preamp Review, 1981, 2 pgs
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Audio Research Classic Ad,SP-3 Preamp,Article,Tube,Nice
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Standard Tube Set for Audio Research GSPre
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Audio Research VT100 Tube Amplifier Ad, LS15 Tube Preamp, Article, 1 Page, 1997
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Audio Research SP-2C Stereo Control Amplifier Vintage Hifi Tube Pre-amp
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Audio Research VT200 Tube Stereo Amplifier
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Standard Tube Set for Audio Research VSi75
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Standard Tube Set for Audio Research Reference 6
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6H30P Dr 6n30p 6h30p 6h30p-dr date code 1980s NOS NIB Super rare One Pair
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