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

$57.66 $34.6

Matched Pair Sylvania 6189/12AU7WA/ECC83 Vacuum Audio Tube

$133.06 $79.84

HiFi Bluetooth Vacuum Tube Preamp Stereo Receiver USB DAC Desktop Headphone Amp

$93.28 $55.97

JJ ECC81 GP 12AT7 GOLD PIN Version Preamp Vacuum Tube DHL EXPRES

$26.4 $15.84

Schiit Freya Noval N Balanced 6N1P Tube Preamp & Remote Control (Black) 230VAC

$821.48 $492.89

McIntosh C2600 Stereo Tube Preamplifier; MM & MC Phono

$4225.76 $2535.46

LOT OF 4 - NEW Vacuum Tube, ECC99, JJ Electronics, Standard Pins, Preamp

$88.0 $52.8

HiFi Assembled DC12V 6N8P Vacuum Tube Preamp Car Audio Stereo Preamplifier Board

$48.4 $29.04

FIVE(5) TV7D/U Strong 1962-64 Amperex Bugle Boy ECC88 6DJ8 Tubes

$175.96 $105.58

Closely Matched Pair Sylvania 6SN7GT VT-231 Tested Strong Balanced Tube

$86.64 $51.99

Vox VE-SI Valvenergy Smooth Impact Vacuum-Tube Compressor Effects Pedal

$193.6 $116.16

Rare NOS 1958 Ediswan France 6DJ8 ECC88 ~ GrailRich RomanticTone RodeMics K2 NTK

$219.12 $131.48

Pre-amp for Record Player Home Theater Tube Amplifier Turntable

$19.8 $11.88

beyond / bass wired 2S vacuum tube bass preamp

$338.3 $202.98

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

$96.1 $57.66

D KLIMO MERLINO 6DJ8(ECC88) Vacuum Tube Preamp Audio Pre-Amplifier Board DIY Kit

$105.75 $63.45

XDUOO MT-604 6J1*4 Balanced Tube Pre-amp XLR/4.4MM Class-A Hybrid Amplifier

$148.72 $89.24

Sovtek 12AX7WB Preamp Vacuum Tube

$28.12 $16.87

BRZHIFI 6J5 F5 Tube Preamplifier Bluetooth 5.0 Lossless Player Headphone Amp

$56.93 $34.16

HHB Classic 80 Pentode 2-Channel Tube Mic Pre Amp

$686.4 $411.84

Diy Tube Preamp for Record Player Pre-amp Turntable Amplifier

$19.79 $11.87

CBS 6SN7WGTA Tested Like NOS Tube

$51.44 $30.87

U30 Bluetooth USB Flash Drive Electronic HIFI Tube Preamplifier Pre-Effects

$72.79 $43.68

RTF (Funkwerk) ECC82 / 12AU7 NOS East German Vacuum Tubes

$57.2 $34.32

Manley Labs Force 4-Channel Vacuum Tube Microphone Preamplifier

$2200.0 $1320.0

Nobsound E6 Direct Heated Vacuum Tube Class A Stereo Audio Pre-Amplifier New

$46.32 $27.79

1EA. JJ E83CC / 12AX7 FRAME GRID PREAMP VACUUM TUBE BRAND NEW IN BOX

$39.56 $23.74

Tube guitar preamp based on SLO

$272.8 $163.68

Nobsound E6 Direct Heated Vacuum Tube Class A Stereo Audio Pre-Amplifier 2023 US

$44.44 $26.66

Vacuum Bile Tube Preamplifier T2 Stereo HIFI Treble Medium Bass Tone Adjust 1 Pc

$194.48 $116.69

Conrad Johnson PV2a Vacuum Tube Pre-Amplifier Stereo OPEN BOX NEW!

$1584.0 $950.4

6AB6 EF93 Brimar For Sherwood Audio Receiver Preamplifier Vacuum Tubes Tested 2

$22.0 $13.2

A1 Vacuum Tube Phono Preamp, Headphone Amp, Hi-Fi Audiophile Preamplifier for MM

$177.42 $106.46

Mullard 12AX7 Russian Preamp Tube (3-pack) Bundle

$70.0 $42.0

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

$288.64 $173.19

MULLARD E88CC/01 NEW OLD STOCK NEW IN BOX GOLD PIN BRITISH VINTAGE VALVE TUBE

$255.2 $153.12

6J1 Valve Pre-amp Tube PreAmplifier Kit Assembled Board Audio DIY Standpipe

$21.38 $12.83

Behringer Tube Ultragain MIC200 Audiophile Vacuum Tube Preamplifier Modeler

$57.2 $34.32

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

$198.09 $118.86

Box X4 Phono Preamp with JAN 5654W Vacuum Tubes for MM Turntable Pho

$124.23 $74.54

RCA Radiotron UX-280 Globe Balloon Tested Good Tube

$42.64 $25.59

RCA 12AU7A ECC82 Tall Plate Clear Top Test Good Vintage Preamp Tube

$5.72 $3.43

Vintage RCA 12AX7 Preamp Tube ECC83 Valve #118

$31.42 $18.85

HiFi Vacuum Tube Audio Sound Processor Preamp Pre-Amplifier SA-60 TPA6120 5532

$56.18 $33.71

Tektronix power transformer for vacuum tube amps, preamps or other circuits

$26.4 $15.84

Hammond / GE 12AX7 Vintage Vacuum Preamp Tube Tested USA

$25.52 $15.32

4 RCA Electron Numitron Tube DR2000 NOS Radio Audio Pre-amp Vacuum Tube NEW

$61.6 $36.96

Three Pack of Electro-Harmonix 12AT7 EH Preamp Vacuum Tube

$57.95 $34.77

1 Philips Miniwatt EF86 aka 6267 Vacuum Tube for Audio Amps and PreAmps HOLLAND

$22.0 $13.2

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

$19.11 $11.47

12SK7GT JAN CNU National Union Audio Receiver Preamplifier Vacuum Tubes Tested

$20.24 $12.14

dbx 376 Tube Channel Strip Microphone Preamp Vacuum Tube 4bit/96KHz Mic Preamps

$571.12 $342.68

Mullard EL34 Missed Key Code Xf2 B8L1 Tested Strong Tube

$113.04 $67.83

Presonus TubePre V2 Vacuum Tube Preamp / DI Direct Box + (2) 6' XLR Cables

$140.8 $84.48

CBS 6SN7WGTA Tested Like NOS Tube

$51.44 $30.87

RCA 12AU7 ECC82 Tall Black Plate Vintage Preamp Tube

$4.36 $2.62

Closely Matched Pair GE 6SL7GT Same Date True NOS NIB Tested Balanced Tube

$60.24 $36.15

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

$59.91 $35.95

MARCONI 6CG7/6FQ7 BLACK PLATES MAXI PREAMP TESTED

$17.56 $10.54

Warm Audio WA-MPX Single-Channel Tube Mic Microphone Preamp - New

$659.12 $395.48

6189 Vacuum Tube 1958 RCA JRC 6189/12AU7WA Audio HiFi Preamps Amp Mixers Stereo.

$31.68 $19.01

Joyo Mini Hybrid 20-Watt Vacuum Tube 2 Channel "Tweedy" Amp Head

$66.0 $39.6

1980’s Laney AOR Pro-Lead 100, Dual preamp 100w Tube Amp Head. Rare! EX

$748.0 $448.8

Electro Harmonix 12AX7EH / ECC83 Preamp Tubes - Set of 6

$67.29 $40.38

Closely Matched Pair GE 7581A 6L6GC KT66 Tested Strong Tube

$157.04 $94.23

Synergy Powerball 2-channel Preamp Module

$299.2 $179.52

Vintage Amperex by GE 12AT7 Preamp Tube ECC81 Valve Made In USA #180

$35.01 $21.01

NOS Pair National 6SJ7 - audio radio Preamp Tubes NIB

$13.2 $7.92

Sylvania JAN 12AT7WA preamp tube, Tested new Good !

$21.12 $12.68

1 x USA 12AT7 preamp tube, Tested Good !

$7.5 $4.5

VACUUM TUBE CIRCUIT DESIGN: GUITAR AMPLIFIER PREAMPS, By Richard Kuehnel

$120.34 $72.21

GE Type JAN-12AU6 Pentode Vacuum Tube Audio Preamp NOS/NIB Made in USA

$3.78 $2.27

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

$55.66 $33.4