Brand New Matched Octet (8) Electro-Harmonix 6SN7 Vacuum Tubes

$260.86 $156.52

Brand New Current Matched Octet (8) Electro-Harmonix 6L6GC Vacuum Tubes

$294.92 $176.95

Pro-Ject Tube Box S2 Phono Preamplifier Black

$439.12 $263.48

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

$363.81 $218.29

Matched Pair RCA 6JE6C 6LQ6 6MJ6 6ME6 LIFE TEST Great, Emission Over 100% Tube

$86.64 $51.99

Vintage NOS NIB Sylvania 12AU7A Tube Preamp Electron Vacuum Amplifier Audio Radi

$35.21 $21.12

ART Applied Research and Technology Professional Tube Mic Preamp

$70.4 $42.24

Presonus StudioChannel Studio Channel Recording Preamp+Studio Mic+Headphones

$350.16 $210.1

3 x RCA grey plate 12AU7A preamp tubes, Tested Good !

$30.08 $18.05

Vintage Raytheon 12AU7/ECC83/5814 Preamp Vacuum Tube Valve- Bangybang.tube

$29.57 $17.75

Closely Matched Pair Ken-Rad 6B4G One Tube Missed Key Same Date Tested Good Tube

$69.04 $41.43

OriPure Hand-made OAH-05 15W All Tube Guitar Amplifier Head

$269.98 $161.99

Warm Audio WA73-EQ Microphone Preamp EQ - OPEN BOX

$597.5 $358.5

REISONG 1:1 Audio Tube Amplifier Passive Step-up Transformer Hi-End Preamplifier

$89.46 $53.68

Preamp Stereo Audio HiFi Tube Preamplifier 12AU7 12AX7 6Z4 Vacuum Tube US

$263.12 $157.87

T9 Preamplifier 2x6E2 HiFi Tube Amplifier MM/MC Turntable Microphone Amplifier

$84.44 $50.67

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

$208.56 $125.14

Vacuum Tube, 5Y3GT, Tube Amp Doctor, Premium Selected, Rectifier, Preamp

$25.48 $15.29

Fosi Audio BOX X4 Tube Amplifier Phono Preamp for MM Turntable Phonograph 5654W

$52.8 $31.68

Elekit Tu-875 Vacuum Tube Preamp

$431.43 $258.86

XDuoo MP-01 Tube Phono Pre-Amp &Headphone Amplifier with Phono and AUX Input

$131.12 $78.68

RCA 6201 12AT7WA ECC81 NOS NIB Life Test Excellent Tested Emission 100% Tube

$21.52 $12.91

12AX7 TELEFUNKEN ECC83 SMOOTH PLATE TUBE WEST GERMANY BOXED NOS *eTracer*

$184.8 $110.88

Sonic Frontiers SFP-1 Signature Phono Stage Mullard Gold Aero Tubes Serviced

$1672.0 $1003.2

2PCS 6J1P Valve Vacuum Tube for PreAmplifier Board Headphone Amplifier Module

$3.77 $2.26

Genalex - Ruby 12AX7 / ECC83 Gold Lion HG Preamp Tube

$25.18 $15.11

Preamplifier for Home Theater System Pre-amp Phonograph Tube

$18.8 $11.28

12AY7 GE GENERAL ELECTRIC PREAMP TUBE NOS NIB 1954-1955

$95.04 $57.02

Studio Projects Vtb1 Tube Microphone Preamp used JAPAN F/S

$234.96 $140.98

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

$330.0 $198.0

FX AUDIO TUBE-04J+ Vacuum Tube Hybrid Main Preamp Digital Amplifier IC Black

$105.56 $63.34

PHILCO 12AU7A 12AU7 ECC82 Black Plate Test Good Vintage Preamp Tube

$4.36 $2.62

Vox AC15C1 Tube Set with Matched Power Tubes, Ruby and JJ Brand Tubes

$98.53 $59.12

Gain Matched Pair (2) JJ 12DW7 / ECC832 / 7247 Vacuum Tubes - Brand New

$58.82 $35.29

6J1 Valve Preamp, Vacuum Electrom Tube Preamp Valve Preamp Amplifier Board Au...

$21.49 $12.89

5 Pcs NOS GE 12BW4 audio radio Preamp vacuum Tubes NIB

$17.61 $10.56

Vacuum Pre-amp Hi-Fi Stereo Preamp Home Theater DIY Preamp Amplifier Board

$18.78 $11.27

2 GE 6CG7 Vacuum Tubes, Twin Triodes for Audio Amps & PreAmps, B&K Tested

$22.0 $13.2

Brand New Mullard Reissue 6L6GC 6L6 Current Matched Sextet (6) Vacuum Tubes

$316.34 $189.81

HiFi 12AX7 Vacuum Tube Preamp KIT Stereo Home Desktop Audio Preamplifier #D7

$224.57 $134.75

6V6GT RCA for Philco Audio Receiver Guitar Power Vacuum Tubes Match Tested Trio

$23.76 $14.26

4 NEC Nippon Japan 6BQ5 EL84 Preamp Tubes ~ Neutral Tone Holy Grail Vintage Quad

$483.12 $289.88

HiFi 6K4 Tube Preamplifier Amplifier Tube Preamp Audio Amp Home Theater DIY

$19.36 $11.62

Matched Pair TESLA EL84 / 6BQ5 / 7189 / 6P14P. Pentode Tubes.Tested.AMP.Preamp

$16.72 $10.04

Mini Vacuum Tube Headphone Amplifier Best HiFi Stereo Preamp Audio Amp NEW

$35.88 $21.53

Universal Audio SOLO610 Classic Vacuum Tube Microphone - Black

$704.0 $422.4

New Matched Trio (3) Genalex Gold Lion 12AX7 / ECC83 / B759 Gold Pin Reissue Vac

$110.0 $66.0

Pair 6189 JAN Sylvania Audio Receiver Preamplifier Vacuum Tubes TV7U Strong

$22.0 $13.2

GE 12AX7 ECC83 7025 Short Grey Plate Tested Good BalanceTube

$25.04 $15.03

Ampex Tube Preamp / Tuner 550

$880.0 $528.0

Luxman CL-35 II Stereo Tube Control Preamplifier Amplifier Audio Japan

$1043.83 $626.3

7591S J/J Audio Receiver Pre-Amp Vacuum Tube Tested

$29.92 $17.95

Standard Tube Set for Vox AC4C1

$47.39 $28.44

Pre Amplifier Home Audio Tube Preamplifier Kit Finished Board

$29.04 $17.42

JJ Tesla Premium Tube Complement Set Mesa Boogie Dual Rectifier Guitar Amp NEW

$303.69 $182.22

Audio Research SP-10 MKI Stereo Tube Preamp

$3960.0 $2376.0

Tube 12AU7 Radio Television Vacuum Amplifier Power Preamp 5814

$15.84 $9.5

Three Pack of Electro-Harmonix 12AX7 Gold Pin Preamp Vacuum Tube

$105.47 $63.29

Tube Preamp for Record Player Pre-amp Hifi System Amplifier

$19.97 $11.99

Pair of Tung-Sol 12AT7 / 6201 New Production Preamp Vacuum Tube

$50.96 $30.58

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

$66.75 $40.05

Vintage Pentron 12AU7/ECC83/5814 Preamp Vacuum Tube Valve- Bangybang.tube

$29.57 $17.75

Vintage Telefunken 12AU7/ECC83/5814 Preamp Vacuum Tube Valve- Bangybang.tube

$110.88 $66.53

GE 5687 5 Star VINTAGE Audio Preamplifier VACUUM TUBE USA Tested 8.7161-D

$13.16 $7.9

Brand New Gain Tested Psvane 12AX7-S ECC83 Gold Pins Art Series Vacuum Tube

$44.81 $26.89

BRZHIFI PAP-711 Field Effect Tube Class A Preamplifier HiFi Power Amplifier 220V

$315.92 $189.56

Pair of Sovtek 12AX7LPS Preamp Vacuum Tube

$76.05 $45.63

12AT7 ECC81 Raytheon Japan Audio Receiver Preamplifier Vacuum Tubes Tested Trio

$66.0 $39.6

Premium Tube Amplifier With Rotary Treble Bass Control + 40 Watt RMS Output

$32.56 $19.54

HIFI Vacuum 12AX7B Tube Preamp Board Refer Marantz 7 Circuit +DC280V PSU Board

$21.12 $12.68

E-K Japan Elekit Vacuum Tube Preamp Kit TU-8500

$473.14 $283.88

HiFi 12AT7 +12AX7 Vacuum Tube Stereo Preamp Board PCB Refer Hetian Mau's Circuit

$10.56 $6.34

Toshiba 6SN7GTB Tested Tube

$10.96 $6.58

Pre-amp for Phono Preamp Vacuum Preamplifier Tube Turntable Stereo

$25.34 $15.21

NEW JJ Tesla 12AX7 ECC83S Preamp Tubes x3 Guitar Amp Amplifiier

$83.6 $50.16

1pc 12AT7 (ECC81) Shuguang Vacuum Tubes Preamp Guitar Amp Audio Valve

$14.96 $8.98

1 x Philips Amperex Holland NL Heerlen⊿ HolyGrail 6DJ8 ECC88 ~ WarmAudio RodeMic

$131.12 $78.68

LUXKIT A3300 Vacuum Tube Preamp From Japan

$440.0 $264.0

Marshall JMP-1 Valve MIDI Pre-Amp Guitar Effect Rack Tested w/ Power cable 100V

$950.4 $570.24

FENDER by GE 6CX8 Vintage Radio Amp Preamp Tube for Fender Super Twin Reverb

$3.48 $2.09

2 x NOS 1963 Philips Amperex Bugle Boy 6DJ8 ECC88 Heerlen ⊿ Holland +Free Post!

$365.2 $219.12

Standard Tube Set for Universal Audio 2-610S Silverface

$68.47 $41.08

BALANCED GAIN (92.1, 93.2) MAXI-PREAMP II TESTED SOVTEK 12AX7WC / ECC83 TUBE

$24.6 $14.76

Vintage 1932 Silvertone 171A (71A), Globe Pre-Amp Triode Vacuum Tube, Tested!

$35.21 $21.12

Preamp Amplifier Board Vacuum Tube Valve Turntable

$30.27 $18.16

BRZHIFI PAP-6A2 Preamplifier Electronic Tube Audio Amplifier with 12V Adapter

$28.15 $16.89

TUNG SOL 5687WA TUBE f/ AUDIO PREAMPLIFIER - STRONG - BALANCED

$17.6 $10.56

6K4 Tube Preamplifier Amplifier HiFi Tube Preamp Audio Amp Home Theater DIY

$18.44 $11.07

Luxman CL-38uC Vacuum Tube Preampliifer with MM/MC Phono Stage

$4219.61 $2531.77

1970/1973 Philips Amperex Orange Label 6DJ8 ECC88 Heerlen Holland⊿ GrailAudio

$214.72 $128.84

Philips ECG 5749W 5749 6BA6 Vintage Gray Plate Vacuum Tubes (NOS sleeve of five)

$22.0 $13.2

GE Branded Raytheon Vintage Guitar Amplifier Preamp 12AU7 Vacuum Tube Tested

$44.0 $26.4

1pc Psvane Tube New EL84 6BQ5 Valve audio amplifier Preamp

$16.72 $10.03

WAITING AUDIO phono preamplifier (Western Electric D163046 transformer.tube)

$1654.4 $992.64

5879 Vacuum Tube Unbranded Pentode Audio Frequency Tube For Pre-Amp /Mixer Works

$12.32 $7.39

ELECTRO HARMONIX 12AU7 PREAMP TUBE

$36.05 $21.63

Vintage Side Getter Clear Top 12AU7A ECC82 Pre Amp Vacuum Tube STRONG BALANCED

$13.2 $7.92

GE 6L6GC Label EICO Tested Good Tube

$17.12 $10.27

New Gain Tested Psvane 6SN7-SE Tennis Ball Vacuum Tube - USA Seller

$54.17 $32.5

Universal Audio LA-610 Tube Channel Strip Mono tube channel strip

$1055.13 $633.08