![20 Times Amplification Reference Audio Research SP-10 Line Vacuum Tube Preamplifier Board Low Distortion and Low Noise HIFI - AliExpress 20 Times Amplification Reference Audio Research SP-10 Line Vacuum Tube Preamplifier Board Low Distortion and Low Noise HIFI - AliExpress](https://ae01.alicdn.com/kf/Sdce5f95c77154340a3b7fd52c72bdeccV.jpg_640x640Q90.jpg_.webp)
20 Times Amplification Reference Audio Research SP-10 Line Vacuum Tube Preamplifier Board Low Distortion and Low Noise HIFI - AliExpress
![AUDIO-RESEARCH SP10 VER.EARLY PREAMPLIFIER SCH Service Manual download, schematics, eeprom, repair info for electronics experts AUDIO-RESEARCH SP10 VER.EARLY PREAMPLIFIER SCH Service Manual download, schematics, eeprom, repair info for electronics experts](https://elektrotanya.com/PREVIEWS/63463243/23432455/audio-research/audio-research_sp10_ver.early_preamplifier_sch.pdf_2.png)
AUDIO-RESEARCH SP10 VER.EARLY PREAMPLIFIER SCH Service Manual download, schematics, eeprom, repair info for electronics experts
![Audio Research Sp-10 High Definition Stereo Preamplifier with SP-10PS Power Supply (Lot 228 - The May Estate AuctionMay 2, 2020, 9:00am) Audio Research Sp-10 High Definition Stereo Preamplifier with SP-10PS Power Supply (Lot 228 - The May Estate AuctionMay 2, 2020, 9:00am)](https://www.lelandlittle.com/images/inventory/large/364/364619_2.jpg)
Audio Research Sp-10 High Definition Stereo Preamplifier with SP-10PS Power Supply (Lot 228 - The May Estate AuctionMay 2, 2020, 9:00am)
![Audio Research SP-10 MKII tube preamplifier - NEAR MINT (SOLD TO JOE) !!! Photo #1338485 - Canuck Audio Mart Audio Research SP-10 MKII tube preamplifier - NEAR MINT (SOLD TO JOE) !!! Photo #1338485 - Canuck Audio Mart](https://img.canuckaudiomart.com/uploads/large/1338485-audio-research-sp10-mkii-tube-preamplifier-near-mint.jpg)