Nice Vintage STROMBERG CARLSON AV-52 Tube Preamp

$132.0 $79.2

2 NOS GE 6267 EF86 Vacuum Tube for Audio PreAmps and FM Radio GREAT BRITAIN

$44.0 $26.4

JOYO 20W Guitar Amplifier Mini Amp 2 Channel High Gain Distortion w/Footswitch

$150.48 $90.29

New Plate Current Matched Quad (4) Tung-Sol Reissue 6L6G Fat Bottle Vacuum Tubes

$329.16 $197.5

RCA 12AT7 ECC81 Vacuum Tubes One Pair Audio HiFi Preamp Amp Amp Mixers.

$22.0 $13.2

Pair of Electro-Harmonix 12AT7 EH Preamp Vacuum Tube

$38.64 $23.18

Fosi Audio BOX X4 Tube Phono Stage Preamplifier NIB

$22.68 $13.61

Sylvania 6SL7GT 50's Vintage Vacuum Tube Chrome Top Radio Audio Amplifier Preamp

$44.0 $26.4

Melos MA-220 Plus series MM MC Tube Hybrid Phono Preamp No Power Supply

$439.12 $263.48

Little Dot LD1+ Headphone Tube Amplifier Pre-amp Vacuum Tube Headphone Amplifier

$154.37 $92.62

Siemens E188CC 7308 Gold Pin *Amplitrex Tested*

$74.8 $44.88

MATCHED LOT 18 GT 12AX7M GT12AX7M GROOVE TUBE VACUUM-TUBE 7025 PREAMP RATED: 15

$131.98 $79.19

New in box, Sovtek, 12AX7WC, Preamp Vacuum Tube, for Amplifier

$26.4 $15.84

TELEFUNKEN 12AX7 ECC83 LEGENDARY DIAMOND STAMP WESTERN GERMANY MATCHING SET NIB

$291.54 $174.93

HiFi Vacuum Tube Preamp Stereo Audio Preamplifier for CD Player Amplifier #WD2

$184.2 $110.52

Gain Matched Octet (8) JJ 6922 / E88CC / 6DJ8 / ECC88 Vacuum Tubes - Brand New

$204.58 $122.75

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

$53.78 $32.27

5U4GA Vacuum Tube RCA Fat Bottle VTG Power Supply Preamps Amp Mixers Audio HiFi.

$10.56 $6.34

Tl Audio 5060 Compressor Vacuum Tube Preamp Compressor - E261 Audio Equipment

$518.84 $311.3

ART TPS II 2-Channel Variable Impedance Tube Preamp Valve Voice

$255.2 $153.12

6K11 6Q11GE Rebrand Audio Receiver Preamplifier Vacuum Tubes Tested Pair

$22.88 $13.73

4 x GE 6SL7GT preamp tubes, Tested Good ! (N1-N4)

$60.23 $36.14

5U4 Vacuum Tube RCA 5U4GB Audio HiFi Preamp Amp Mixers Ham Amateur TRX Radios.

$8.8 $5.28

Vintage Tung-Sol 12AX7 Preamp Tube ECC83 Valve #134

$35.01 $21.01

1 x BEL (Mullard copy) ECC83 - 12AX7 Ribbed Plate Dual Triode Preamp Vacuum Tube

$16.28 $9.77

Solis SO-8000 Stereo Vacuum Tube Bluetooth Audio System ☆ New ☆

$179.7 $107.82

6J1 Valve Preamp, Vacuum Electrom Tube Preamp Valve Preamp Amplifier Board Audio

$23.54 $14.12

Pro-Ject Tube Box S2 Tube Phono-Preamplifier MM/MC NEW Open Box!

$385.44 $231.27

NEW SUCA AUDIO TUBE-T3 PLUS 300W+300W Power Amplifier Tube Preamp w/ VU Meters

$197.12 $118.28

SA-20 HiFi Vacuum Tube Preamp Stereo Desktop Headphone Amp Audio Switcher Box

$68.79 $41.27

Tube Preamp Vacuum Electron Tube Valve Preamp Phono Preamp For Turntable US

$24.97 $14.98

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

$80.6 $48.36

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

$74.44 $44.67

Closely Matched Pair Mullard EL34 Code Xf2 B9C3 Same Date Tested Good Tube

$262.64 $157.59

Pro-Ject: Tube Box DS2 Phono Preamp - Black -(Open Box Special)

$659.12 $395.48

CONN/RCA 12AU7 ECC82 VACUUM TUBE PAIR LONG PLATE BLACK PREAMP TUBE

$26.4 $15.84

Vacuum Tube, 12AT7 / ECC81-Cz, Tube Amp Doctor, Premium Selected, Preamp

$23.28 $13.97

Vintage RCA 12AU7A Clear Top Preamp Tube - Tested Good

$17.61 $10.56

4-Way HiFi Vacuum Tube Preamp Stereo Audio Switcher Box Desktop Headphone Amp 1x

$59.75 $35.85

PreSonus STUDIOCHANNEL Vacuum-Tube Channel Strip, Blue

$316.8 $190.08

Ruby 4 Pack 12AX7AC5 HG Preamp Tubes

$73.66 $44.2

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

$49.47 $29.68

VTL TL-2.5 preamplifier

$1447.6 $868.56

Siemens V72 Tube Mic Preamp SN 1502

$1584.0 $950.4

RCA - 12AX7A - ECC83 - 12AX7 Vintage 1960’s Vacuum Preamp Tube

$25.52 $15.31

Mini Vacuum Tube Headphone Amplifier Desktop Audio Preamp for Home Stereo System

$28.75 $17.25

Class A TUBE Microphone Preamp (12 Pin Rca Compactron Tube)

$132.0 $79.2

12DT8 Matsushita? Audio Receiver Guitar Preamplifier Vacuum Tubes Tested Pair

$22.0 $13.2

Vacuum Tube Phono Preamp MM Turntable Preamplifier Hi-Fi

$100.52 $60.31

Genalex Gold Lion 12AU7/ECC82 Gold Pin Preamp Tube (2-pack) Bundle

$105.32 $63.2

ART Solo MPA Multi-voice Tube Preamplifier

$264.0 $158.4

T5 6J3 Vacuum Tube Bluetooth Preamplifier, Mini Hi-Fi Stereo Preamp with Treble

$53.68 $32.21

6350 Dumont Audio Receiver Preamp Vacuum Tubes Tested Pair

$24.64 $14.78

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

$78.4 $47.04

25W 6J1+LM1875 HiFi Vacuum Tube Preamplifier Board Stereo Audio Preamp Headphone

$30.79 $18.47

Closely Matched Pair Sylvania 6SN7GT VT-231 Tested Like NOS Tube

$130.64 $78.39

DIY PCB - 10-15W high Voltage Power Supply for Tube Preamp

$15.84 $9.51

Pre-amp for Phono Preamp Vacuum Electron Tube Valve Amplifier

$19.36 $11.62

phono tube preamplifier

$198.0 $118.8

Douk Audio P1 Vacuum Tube Preamp Hi-Fi Headphone Stereo Wireless Receiver

$71.37 $42.83

1PC Tube Preamp Vacuum Electron Tube Valve Preamp Phono Preamp For Turntable

$28.77 $17.27

Monoprice 2 x 15W Hybrid Tube Amplifier w/ Bluetooth (16152)

$70.36 $42.22

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

$59.96 $35.98

🔊 𝗗𝗢𝗡𝗡𝗘𝗥 Dynamic Microphone Preamplifier For Recording Gaming Streaming

$1.14 $0.69

6V6 Vacuum Tube National Union 6V6GT Audio HiFi Preamps Amp Mixers Ham Amateur.

$7.04 $4.22

6AU6A Vacuum Tubes Realistic One Pair Preamps Amp Mixers Record Players Radios.

$14.96 $8.98

1PC Tube Preamp Vacuum Electron Tube Valve Preamp Phono Preamp For Turntable

$18.36 $11.02

(15) Metal Base Vacuum Tube Lot

$26.4 $15.84

PRT13A-BAL Remote Version Stereo Balance Tube Preamplifier Vacuum Tube Preamp

$288.64 $173.18

Electro-Harmonix 12AX7 ECC83 Preamplifier Preamp Tube - Quad Set

$74.8 $44.88

Presonus Bluetube DP V2 2 Channel Tube Mic Pre-Amp DP2 Tube Drive Control

$197.96 $118.78

Mini Bluetooth 5.0 Vacuum Tube Preamp Stereo Audio Amp HiFi USB Music Player

$48.61 $29.17

Vacuum Tube, 12AX7 / ECC83, JJ Electronics, Gold Pins, Preamp

$30.76 $18.46

Ruby 12AX7A Preamp Tube Valve #97

$13.47 $8.08

Rogue Athena Tube Preamplifier Remote!

$1760.0 $1056.0

JAN 5755 Raytheon NOS NIB Audio Receiver Pre-Amp Vacuum Tubes Tested Pair

$34.32 $20.59

Pair of Electro-Harmonix 6922 EH Gold Pin Preamp Vacuum Tube

$82.64 $49.58

Vintage Vacuum Tube Powered EICO Stereo Preamp Model HF-84 NO WAY TO TEST!!!

$660.0 $396.0

12AT7 ECC81 ProComm Fender Receiver Guitar Preamp Vacuum Tubes Tested Pair

$23.76 $14.26

Vintage Marantz Model 7C Stereo Vacuum Tube Preamp Preamplifier

$4048.0 $2428.8

Mini Vacuum Tube Headphone Amplifier HiFi Stereo Amp Best Audio Preamp

$55.77 $33.46

Class A 6N8P+6P3P Tube Preamplifier Single EndedHiFi Vacuum Tube Amplifier

$177.84 $106.71

Mini Bluetooth 5.0 Vacuum Tube Amplifier Receiver HiFi Stereo Preamp Audio Amp

$66.17 $39.71

PreSonus STUDIO CHANNEL 1 Channel Vacuum Tube Pre-Amp Strip w/ Power Supply

$220.0 $132.0

Electro-Harmonix 12AX7 Gold Pin Preamp Vacuum Tube

$35.16 $21.1

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

$49.15 $29.49

Pair of Tung-Sol 12AU7 / 6189 New Production Preamp Vacuum Tube

$47.44 $28.46

6072A JAN RAYTHEON 12AY7 BLACK PLATE PREAMP TUBE NOS NIB (1969) *eTRACER*

$145.46 $87.28

Little Bear P51 Tube Pre Amp Untested

$44.0 $26.4

Vacuum Tube, ECC99, JJ Electronics, Standard Pins, Preamp

$24.2 $14.52

Avalon VT-737SP Class A Mono Tube Channel Strip

$1408.0 $844.8

VTL TP-2.5i MM & MC Phono Preamplifier

$2175.36 $1305.22

Amina Tube Phono Stage Vintage Tube Radio Stereo Power Rare Used

$462.0 $277.2

Tube Preamp Fever Hifi 6J5 Vacuum Tube Preamp Bluetooth Amplifier NEW

$16.39 $9.84

Douk Audio T4 PRO Vacuum Tube Phono Preamp MM

$35.21 $21.12

HiFi Vacuum Tube Preamplifier Preamp 12AU7 6N2 6Z4 6N4 Tube Ref Shigeru Circuit

$423.86 $254.32

Hifi Bluetooth Vacuum Tube Preamp Stereo Audio Amplifier Headphone Amp VU Meter

$139.48 $83.69

OriPure OA-H15 Handcrafted 15W All Tube Guitar Amp Head Output PaperTransformer

$255.2 $153.12

Dynavox TPR-3 Tube Stage Preamplifier Pre Amp Black Tube Preamplifier

$207.04 $124.23

GE 7025 12AX7 ECC83 VACUUM TUBE O GETTER GREY PLATE LOW NOISE SINGLE SWEET 1979

$52.66 $31.6