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Preamp Tubes

Ruby tubes have been carefully matched and tested. Our preamp tubes are designed to deliver superior sound quality and are compatible with a wide range of amplifiers and audio systems

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Ruby 12AX7AC5 HG Preamp Vacuum Tube Ruby 12AX7AC5 HG Preamp Vacuum Tube
12AX7 Ruby Trio Preamp Vacuum tubes 12AX7 Ruby Trio Preamp Vacuum tubes
JJ 12BH7-A Preamp Vacuum Tube
Save $2.85
JJ ECC83S / 12AX7 Preamp Vacuum Tubes JJ ECC83S/ 12AX7ACZ Preamp vacuum tube, ruby tested preamp vacuum tube, matched pair
JJ ECC83S / 12AX7 Preamp Vacuum Tubes
Sale priceFrom $16.15 Regular price$19.00
Save $1.50
RUBY tested JJ ECC81 Preamp vacuum tube for music amplifiers RUBY tested JJ ECC81 Preamp vacuum tube for music amplifiers
JJ ECC81 / 12AT7 Preamp Vacuum Tube
Sale priceFrom $17.50 Regular price$19.00
JJ 12AU7 Preamp Vacuum Tube
JJ 12AU7 Preamp Vacuum Tube
Sale price$25.00
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Ruby 12AX7A Preamp Vacuum Tube / SS Silver Special Ruby 12AX7A Preamp Vacuum Tube / SS Silver Special
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Shuguang 12AX7B Preamp Vacuum Tube
Shuguang 12AX7B Preamp Vacuum Tube
Sale price$15.00 Regular price$17.00
Ruby 12AX7AC7 Preamp Vacuum Tube Ruby 12AX7AC7 Preamp Vacuum Tube
Ruby 12AX7AC7 Preamp Vacuum Tube
Sale priceFrom $30.00
RUBY 7025SS / 12AX7 Preamp Vacuum tube
Genalex 12AX7 Gold Lion Preamp Vacuum Tube
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Ruby 12AX7 Preamp Vacuum Tube
Ruby 12AX7 Preamp Vacuum Tube
Sale priceFrom $15.00
12AX7 Mullard Preamp Vacuum Tube, Ruby tested vacuum tube
Mullard CV4004 Preamp Vacuum Tube Mullard CV4004 Preamp Vacuum Tube
Mullard CV4004 Preamp Vacuum Tube
Sale priceFrom $25.00
12AX7EH Electro Harmonix
12AX7EH Electro Harmonix
Sale price$22.00
12AX7 Tung Sol, Ruby tested Preamp tube
12AX7 / 7025 Electro Harmonix Preamp Vacuum Tube 12AX7 / 7025 Electro Harmonix Preamp Vacuum Tube
Sovtek 12AX7WA / 7025 Preamp Vacuum Tube
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Sovtek 7025 / 12AX7WB  Preamp Vacuum Tube Sovtek 7025 / 12AX7WB  Preamp Vacuum Tube
Svetlana 12AX7 Preamp Vacuum Tube Svetlana 12AX7 Preamp Vacuum Tube
Svetlana 12AX7 Preamp Vacuum Tube
Sale priceFrom $28.99
Electro-Harmonix 12AT7 Preamp Vacuum Tube
Electro-Harmonix 12AU7 EH Preamp Vacuum Tube
12AX7 6922 Electro Harmonix Preamp Vacuum Tube 12AX7 6922 Electro Harmonix Preamp Vacuum Tube
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MULLARD 12AT7 WA CV4024 KQDD/K