ART TubeFire 8 Channel Tube Microphone Firewire Preamp Interface w/ Power cable

$284.13 $170.48

Finished HiFi EL34-B Vacuum Tube Amplifier Class A Single-ended Stereo Power AMP

$330.02 $198.02

Pro-Ject Tube Box DS2 Phono Preamplifier Silver

$703.12 $421.88

New Current Matched Sextet (6) Psvane KT88-T Classic MKII II Series Vacuum Tubes

$605.01 $363.01

Matched Pair Tung Sol 5751 pre-amp tubes, Brand New in Box !

$55.59 $33.36

Sylvania 6SN7GT Vintage Tube Date Code 313 Tested VG+ Electron Vacuum Preamp

$15.4 $9.24

Sylvania Canada type 12AU6A Pentode Vacuum Tube Audio Preamp NOS/NIB

$3.78 $2.27

ELEKIT Power Amplifier Vacuum Tube pre-amplifier assembling Kit TU-8550 Silver

$790.07 $474.04

ART OPL Professional Tube Mic Preamp

$44.0 $26.4

6DJ8 ECC88 Amperex White Letter Audio Receiver Pre-Amp Vacuum Tubes Tested Pair

$37.84 $22.7

Vintage RCA 12BH7A Preamp Tube Valve #67

$26.04 $15.62

AIR TIGHT ATC-5 vacuum tube preamplifier

$7031.2 $4218.72

Tube Preamp Vacuum Electron Tube Valve Preamp Phono Preamp For Turntable

$21.56 $12.94

HiFi Vacuum Tube Preamp Stereo 4 - Way Audio Switcher Box Desktop Headphone Amp

$50.25 $30.15

Brand New Current Matched Octet (8) Electro-Harmonix 6V6 6V6GT Vacuum Tubes

$260.86 $156.52

6C10 GE labeled "National Electronics" NOS/NIB Vacuum Tube Tested

$88.0 $52.8

Finished HiFi EL34-B Vacuum Tube Amplifier Class A Single-ended Stereo Power AMP

$330.02 $198.02

Hiend Stereo ECC82 vacuum Tube preamp base on America Rogue99 preamplifier

$253.44 $152.07

Mini 5654 Vacuum Tube Phono Preamp Home Stereo Audio Pre-Amplifier Headphone Amp

$60.38 $36.23

LOT OF 2 - Behringer TUBE ULTRAGAIN MIC100 Audiophile Vacuum Tube PreAmp+Limiter

$66.0 $39.6

Vacuum Tube, 12AX7 / ECC83, Electro-Harmonix, Preamp

$21.52 $12.91

VERY RARE TELEFUNKEN 5965 Ribbed Plate VACUUM TUBE Diamond Square

$61.16 $36.7

Lot of 2 Matched NU 6SN7GT Tested Good Balanced Tube

$60.24 $36.15

12AX7 GE 17mm Gray Plates Audio Receiver Guitar Power Vacuum Tubes Tested Pair

$34.32 $20.59

Vizion Valve Extreme Vacuum Tube Overdrive Preamplifier

$267.07 $160.24

Grail Rare Berlin First Edtn 1960 Telefunken ◇ Germany 6DJ8 ECC88 ~ 6922 E88CC

$280.73 $168.44

2 Sylvania 12AX7 - USA - Preamp Vacuum Tubes - Tested - FREE Shipping!

$44.0 $26.4

6LN8 6BL8 International Service Master NOS NIB Audio Preamplifier Vacuum Tubes 2

$22.0 $13.2

NEW Hi-Fi Vacuum Tube Preamp Stereo Audio Switcher Box Desktop Headphone Amp

$48.48 $29.09

HiFi 12AX7 Vacuum Tube Preamp Stereo Audio Desktop Preamplifier Refer to Marantz

$227.58 $136.55

WA-MPX Single-Channel Tube Mic Preamp

$659.12 $395.48

Audio Nirvana EL84 Ultralinear Vacuum Tube Stereo Amplifier

$703.12 $421.88

Melton Audio MP-12 High End Stereo Tube Preamp

$11000.0 $6600.0

HiFi Vacuum Preamp Tube Stereo 4-way Audio Switcher Box Desktop Headphone Amp

$66.78 $40.07

Vintage Magnavox 12AX7A Preamp Tube 12AX7 / ECC83 Valve #80

$26.04 $15.62

Sovtek 12AX7WC Preamp Vacuum Tube

$26.36 $15.82

NOS WESTINGHOUSE 6AN8A Audio Preamp RADIO VACUUM TUBE USA

$8.66 $5.2

Pair of Electro Harmonix EF86 / 6267 Preamp Vacuum Tube

$58.0 $34.8

4-way HiFi Vacuum Tube Preamp Stereo Audio Switcher Box Desktop Headphone Amp

$56.03 $33.62

New Gain Matched Pair (2) Genalex Reissue 12AT7 ECC81 GOLD PINS Vacuum Tubes

$122.21 $73.33

RCA / Hammond 6SN7GTB Vintage Black Plate Preamp Tubes Matched Pair Tested USA

$34.32 $20.6

2PCS TELEFUNKEN ECC83 / 12AX7 / AUDIO TUBES! O-GETTER! TESTED! RARE!

$122.32 $73.4

Sylvania 24LQ6 24JE6C Label RCA LifeTest Excellent Emission Over 100% Tube

$8.32 $4.99

MATCHED FOUR (4) GE 12AX7 ECC83 Grey Plate Amp Preamp Vacuum Tubes

$87.12 $52.27

Backert Labs Rhumba 1.3 Stereo Tube Preamplifier

$3167.12 $1900.28

Matched Pair RCA 12AX7A ECC83 Life Test Excellent Test Emission Strong Tube

$86.64 $51.99

Electro-Harmonix 6922 E88CC ECC88 Preamp Vacuum Tube - Made in Russia

$13.2 $7.92

Black 6A2 Vacuum Tube TUBE-T1 PLUS Preamplifier USB and Bluetooth 5.0

$43.72 $26.24

Three Pack of JJ ECC82 / 12AU7 Preamp Vacuum Tube

$52.67 $31.61

6CG7 Vacuum Tube Sylvania 6CG7 Audio HiFi Amp Mixers Preamps Record Players 6FQ7

$8.8 $5.28

Tung-Sol 6SL7GT New Prod. Preamp Vacuum Tube

$43.96 $26.38

12AX7 Mullard, I61, Copper Grid Posts, B0J = Blackburn 1960, TV-7 Test = 92%/92%

$59.4 $35.64

2 x Valvo E88CC - 6922 - CCa Test STRONG Red Label 7LB 𝛥5B1 Preamp Vacuum Tubes

$124.96 $74.98

Closely Matched Pair Ken-Rad 6SN7GT VT-231 Same Date NOS NIB Tested Strong Tube

$614.64 $368.79

728A Vacuum Tube Preamplifier HIFI EXQUIS 12AT7 12AU7 6Z4 Silver

$395.43 $237.26

Victory Sonics 2 Ch Apt-X BT Tube Preamp - No Case, board and Tube only -Used

$61.6 $36.96

RCA (Beckman) 6AN8 Audio Preamplifier VACUUM TUBE Tested Strong USA 4.2624-D

$13.16 $7.9

Brand New Gain Matched Trio (3) Electro-Harmonix 12AT7 ECC81 Vacuum Tubes

$67.48 $40.49

HiFi Vacuum Tube Preamp Bluetooth Receiver USB DAC Stereo Headphone Amplifier

$85.68 $51.41

Standard Tube Set for Orange Rockerverb 100 MKIII

$186.12 $111.68

1EA. JJ ECC83S / 12AX7 PREAMP VACUUM TUBE BRAND NEW IN BOX ***FREE SHIPPING***

$28.12 $16.87

HiFi Vacuum Tube Phono Preamplifier MM RIAA Turntable Preamp Stereo Audio Amp

$45.49 $27.3

Tungsram ECC83 / 12AX7 Vacuum tubes .........NOS....Match Pair

$131.96 $79.18

Vacuum Tube, 6SL7, JJ Electronics, Preamp

$23.72 $14.23

Warm Audio WA-MPX Microphone Tube Preamplifier

$659.12 $395.48

Audio Research LS2B Stereo Tube Hybrid Preamplifier

$1422.08 $853.25

RCA 12AX7A Vintage Preamp Vacuum Tube Tested Good for Guitar Amp USA

$24.64 $14.78

Lyele Wada Shigeru Bile Scratched Vacuum Tube Preamplifier

$739.41 $443.65

NAD PP4 Digital Phono USB Preamplifier

$83.6 $50.16

Synergy Friedman BE Pre-Amp

$337.92 $202.75

Mini Vacuum Tube Headphone Amplifier HiFi Stereo Preamp Audio Amp pre-amplifier

$50.47 $30.29

Matched Pair Of GE 5965/12AV7 MAXI PREAMP TESTED

$13.2 $7.92

UTC G-4461 POWER TRANSFORMER FOR TUBE AMPLIFIER PROJECTS ***

$22.0 $13.2

Synergy SYN1 Tabletop Preamp - One Module Slot

$374.0 $224.4

Vintage TungSol 5963/12AU7/ECC83 Preamp Vacuum Tube Valve- Bangybang.tube

$29.57 $17.75

Electro-Harmonix 6SN7 EH Gold Pin Preamp Vacuum Tube

$65.96 $39.58

Vintage Conrad-Johnson PV 10AL Vacuum Tube Pre-Amplifier - SOLD AS IS #6994

$616.0 $369.6

PM Components UK 12AT7C ECC81 Pair of Preamp Vacuum Tube Used & Tested

$17.6 $10.56

6AH4GT RCA Audio Receiver Preamplifier Vacuum Tubes Tested Pair

$22.0 $13.2

CAT-SL1-1 Preamp Board Bile Preamp Electronic Tube Preamp with Tubes

$164.62 $98.77

Sylvania 6SN7GT VT-231 Tested Like NOS Tube

$86.64 $51.99

Arcturus 12AU7 ECC82 NOS NIB Long Black Plate Angled Square Getter Tube

$42.64 $25.59

Closely Matched Pair GE + NU 6N7GT CV1958 NOS NIB Life Test Excellent Tube

$42.64 $25.59

Vintage Sylvania 12BH7A Tube Black Plate Square Getter Tested Balanced

$27.72 $16.64

6J4+6P6P Vacuum Tube Pre-Amplifier Stereo HiFi Preamp DIY Kit

$103.84 $62.31

1952 Sylvania 6SN7GT Tubes x 4 (3-hole / copper posts) - Amplitrex Tested

$435.6 $261.36

SYLVANIA 12AU6 A 8426 TUBE gm MATCHED PAIR SUPER SWEET TONE B

$3.51 $2.11

DBX 586 2- channel Tube pre amp

$457.6 $274.56

HiFi 12AX7 Vacuum Tube Preamp Stereo Audio Desktop Preamplifier Refer to Marantz

$217.32 $130.39

ART Tube MP Project Series USB Tube Mic Preamp w Variable Impedance OPEN BOX

$97.66 $58.6

Ruby 6L6 GC MSTR Power Tubes Matched Pair + 3 x Ruby 12AX7AC5 HG Preamp Tubes

$107.02 $64.22

NOS Russian Novosibirsk 6SN7GT 6N8P 5692 CV181 6H8C TUBE NEW IN BOX

$15.84 $9.5

Hifi Sound System Pre-amp for Record Player Tube Amplifier Turntable

$19.97 $11.99

NOS GE 5687 Black Plates AUDIO Preamplifier VACUUM TUBE USA Tested 5.7100-D

$21.08 $12.65

Tube Headphone Preamp Phono Pre-amp for Hifi System Amplifier

$19.8 $11.88

Tube Amplifier Kit 6J1 Tube Preamplifier Vacuum Tube Amplifier 2.0 / Stereo T...

$15.97 $9.58

Vacuum Tube Preamp Module 2PCS 6J1P for Enhanced Music Listening Experience

$11.14 $6.68

HiFi Vacuum Tube Preamp Bluetooth 5.0 USB DAC Stereo Headphone Amplifier APTX

$80.6 $48.36

Gain Matched Quad Genalex Gold Lion CV4004 Short Plate 12AX7 Vacuum Tubes Russia

$236.59 $141.96

HiFi Vacuum Tube Preamp Stereo 4- Way Audio Switcher Box Desktop Headphone Amp

$48.76 $29.26