Nobsound Little Bear T7 Vacuum Tube Mini Phono Stage RIAA MM Turntable Preamp

$198.0 $118.8

SA-20 HiFi Vacuum Tube Preamp Stereo Sound 4way Audio Switcher Box Headphone AMP

$60.76 $36.46

Nice Vintage STROMBERG CARLSON AV-52 Tube Preamp

$263.96 $158.38

Vacuum Tube Preamplifier Aluminum Alloy Case Anti Interference Phono Preamp 110V

$191.94 $115.17

Electro-Harmonix 6SN7 EH Preamp Vacuum Tube

$29.0 $17.4

Bellari VP130 Hybrid Tube Phono Preamp with Power Adapter And Manual

$193.6 $116.16

Musical Paradise MP-701-MK3 Electronic Tube Amplifier Stabilizing Preamplifier/

$791.12 $474.68

Bottlehead Eros 1 Phono Preamplifier Professionally Built

$836.0 $501.6

6Z5P+12AX7B Marantz 7 Tube Preamplifier Kit M7 HiFi Vacuum Tube Preamp New

$127.6 $76.56

Marshall ECC83 12AX7 Triple Mica Radio Amp Preamp Tube

$7.88 $4.73

Vintage 1970s Magnavox Mullard 12DW7 Preamp Tube ECC832 Valve #143

$26.04 $15.62

Hifi 12AX7 / 12AU7 Stereo Tube Preamp Bare PCB base on C22 preamplifier Circuit

$6.87 $4.12

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

$81.89 $49.14

Matched Pair VT-229 NOS JAN CHS 6SL7 Black Plates UTS navy Anchor

$95.04 $57.03

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

$89.9 $53.94

SA-20 4-way HiFi Vacuum Tube Preamp Audio Switcher Box Desktop Headphone Amp69

$55.99 $33.6

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

$261.44 $156.87

Broken ART TPS II Stereo Tube Preamp 2 Channel Studio Preamplifier System

$82.72 $49.63

Amperex 12AT7/ECC81 France Vacuum preamp tube for guitar amp Stereo

$24.64 $14.78

Dennis Had Inspire LP-396-P Stereo Tube Preamplifier

$2587.2 $1552.32

Mullard CV4004 / 12AX7 New Production Preamp Vacuum Tube

$24.6 $14.76

HiFi 2.0 Channel Tube Audio Bluetooth Stereo Processor Preamp Pre-Amplifier

$71.28 $42.77

Vacuum Tube, 12AU7, Shuguang, Preamp

$14.92 $8.95

Audio Tube Preamp

$8.81 $5.28

Luxman Cl35Ii Vacuum Tube Preamp #JAB13351

$1584.95 $950.97

Motorola 12AX7 Preamp Vacuum Tube Military Grade 12AX7 Tested (T23)

$35.21 $21.12

1959 MULLARD 12AX7 ECC83 B339 TUBE GREAT BRIT LONG-PLATE 1,2mA/1.2mA (100%/100%)

$196.42 $117.85

HiFi Class A Vacuum Tube Pre-Amplifier Bluetooth Stereo Audio Preamp USB PlayeVo

$174.72 $104.83

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

$191.37 $114.82

Vacuum Tube Stereo Preamplifier Phono Preamp DIY KIT for KONDO M77(no tube）

$129.59 $77.75

RCA 6F6GT Vacuum Tube Vintage Radios Amp Mixers Preamps.

$7.04 $4.22

DOUK AUDIO T4 PRO Vacuum Tube Phono Preamp, MM Turntable Preamplifier, GE5654

$44.0 $26.4

Vintage International Servicemaster Yugoslavia 12AX7 guitar amp preamp tube

$26.4 $15.84

Vacuum Electron Tube Valve Preamp Hifi Sound System Amplifier

$19.8 $11.88

ART Tube MP Studio Tube Microphone or Instrument Preamp

$57.2 $34.32

Mini Vacuum Tube Preamp HiFi Stereo Preamp Amplifier Treble Bass

$43.56 $26.14

Warm Audio WA-MPX Single-Channel Tube Mic Preamp 850031640160

$659.12 $395.48

EVH ECC83/12AX7 Preamp Tubes Duet

$61.6 $36.96

Douk Audio T4 PLUS Phono Stage Preamp w/GE5654 Tube Preamplifier Headphone Amp

$88.0 $52.8

2 RCA 12AX7 BLACK PLATE VACUUM TUBES 2

$70.41 $42.24

12AX7 / ECC83 PREAMP Vacuum TUBE Matched Pair- USA-Tested Strong-Ribbed / Halo

$43.12 $25.88

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

$19.36 $11.62

P1 Bluetooth 5.0 Vacuum Tube Preamplifier Hi-Fi Valve Headphone Amplifier

$108.46 $65.08

ART PRO CHANNEL III Multivoice Tube Rackmount Microphone Preamp

$352.0 $211.2

ART USB Dual Pre Project Series 2 Channel Mic Preamp Amp

$44.0 $26.4

6A2 Vacuum Tube TUBE-T1 PLUS Preamplifier USB & Bluetooth 5.0 Lossless Amplifier

$46.03 $27.62

DC12VCar Audio 6N8P(6H8C 6SN7) Vacuum Tube Preamplifier Preamplifier HiFi AMP

$39.5 $23.7

Nineteen 12AT7 Preamp Vacuum Tubes - GE - Sylvania - RCA - FREE Shipping!

$220.0 $132.0

High Voltage Vacuum Tube Preamplifier MINI 2J27S Heaterless Tube Preamp

$52.8 $31.68

Paragon Audio Model 12 Tube Preamplifier (Worldwide Shipping)

$4840.0 $2904.0

Nobsound P1 PRO HiFi vacuum tube preamplifier Bluetooth 5.0 USB from Japan

$94.64 $56.79

One (1)UNUSED TV7D/U RE-TEST Factory Matched 1951 Tung-Sol JAN CTL 6SU7GTY Tubes

$149.56 $89.74

LOT OF 5 12AT7 Preamp VACUUM TUBES TV-7A Test w Measurements + 1 bad Telefunken

$28.42 $17.05

SUCA-AUDIO Phono Preamp MM Vacuum Tube Preamplifier

$39.6 $23.76

Vintage RCA 12AU7A PLATINUM GRADE Clear Top Preamp Tube 90% NOS = 5814, 6189

$17.56 $10.54

Dynasty Proaudio TMP-1 Professional Vacuum Tube Preamplifier with Limiter

$88.0 $52.8

New(?) in Box Calrad Model PRE-105 Tube Preamplifier 125 Volts 4W Japan w/Instru

$70.36 $42.22

Nobsound P1 PRO GE5654 RED HiFi vacuum tube preamp Bluetooth 5.0 USB DAC APTX

$100.57 $60.34

Tube Preamp Vacuum Electron Tube Valve Preamp Phono Preamp For Turntable

$19.36 $11.62

Lot 30 UNTESTED Amperex EL34 6CA7 Westin GE 6AS7 GA Magnavox 6V6GT 12AT7

$51.92 $31.16

Presonus StudioChannel Studio Channel Recording Vacuum Tube Mic Preamp Strip

$316.8 $190.08

Tube Preamp Vacuum Electron Tube Valve Preamp Phono Preamp For Turntable

$18.39 $11.03

1EA. JJ ECC83 S / 12AX7 PREAMP VACUUM TUBE BRAND NEW IN BOX

$23.32 $14.0

T11 Vacuum Tube Phono Stage Turntable MM RIAA Preamplifier for Record Players

$198.52 $119.12

6DJ8 ECC88 Sylvania Rebrand Audio Receiver Pre-Amp Vacuum Tubes Tested Trio

$22.0 $13.2

Universal Audio UA 6176 Vintage Channel Strip 610B Tube Preamp 1176LN

$1319.12 $791.48

Sovtek 6SC7 Preamp Vacuum Tube

$35.16 $21.1

Pair of Mullard 12AU7 / ECC82 New Production Preamp Vacuum Tube

$47.44 $28.46

Sovtek 6N1P Preamp Vacuum Tube

$22.84 $13.71

Vacuum Electron Tube Valve Preamp Pre-amp for Phono Amplifier

$18.38 $11.03

EVH ECC83/12AX7 Preamp Tubes Duet

$61.6 $36.96

Vacuum Tube, ECC83 / 12AX7, Classic Series, Psvane, Preamp

$15.27 $9.17

ART TPSII 2-Channel High Performance Tube Preamp System & Variable Valve Voicing

$255.2 $153.12

Electro-Harmonix 12AU7 EH Gold Pin Preamp Vacuum Tube

$32.52 $19.51

Pair of Electro-Harmonix 6SN7 EH Preamp Vacuum Tube

$58.0 $34.8

RCA 6BL7GT DUAL PREAMP VACUUM TUBE WITH BOX TESTED GOOD

$11.88 $7.13

Victory Sonics 2 Ch Apt-X BT Tube Preamp w/ Case and Tube - Used

$66.0 $39.6

Electro-Harmonix 12BH7EH Preamp Tube

$26.4 $15.84

T4 PRO Vacuum Tube Phono Preamp MM Turntable Preamplifier GE5654 Hi-Fi Headph...

$44.0 $26.4

HiFi Vacuum Tube Preamp Class A Single-ended / Balanced XLR Stereo Audio Preamp

$860.28 $516.17

6C5G Tung Sol Audio Receiver Pre-Amp Vacuum Tube Tested

$16.72 $10.03

Pre Amp Tube Phono Preamp Vacuum Preamplifier for Home Theater System

$18.98 $11.39

Western Electric Type 408A NOS NIB Audio Receiver Preamplifier Vacuum Tubes

$23.76 $14.26

ART Tube MP Project Series Low Noise High Output Microphone Preamp

$44.0 $26.4

Vacuum Tube, 12AT7, Shuguang, Preamp

$14.92 $8.95

G.E. 5 STAR 5814 PREAMP VACUUM TUBE DUAL TRIODE TESTED GOOD

$10.52 $6.31

DBX Mini-Pre Amp Single Channel Vacuum Tube Microphone Preamp: NO Power Supply

$45.32 $27.2

Ruby 12AX7A Preamp Tube Valve #96

$13.47 $8.08

Electro-Harmonix 12DW7 EH Preamp Vacuum Tube

$36.92 $22.15

MENGYUE EL34 Tube Amplifier With TUNG SOL 12AX7 Gold Pin Drivers EXCELLENT

$286.0 $171.6

Ruby 12AX7A Preamp Tube Valve #98

$13.47 $8.08

EX-pro BP-1000 vacuum tube preamp audio equipment

$352.0 $211.2

HiFi Vacuum Tube Preamplifier Mini Stereo Preamp

$70.4 $42.24

Sebatron vmp-4000e four channel valve preamp

$881.02 $528.61

TL Audio 5060 Compressor Vacuum Tube Preamp Compressor

$584.28 $350.57

Matched Pair TWO(2) UNUSED TV7D/U RETEST 1948-49 Tung-Sol JAN CTL 6SU7GTY Tubes

$307.96 $184.78

FX-AUDIO TUBE-01J Vacuum tube preamplifier line amplifier NFJ model Japan F/S

$75.73 $45.44

HiFi Vacuum Tube Audio Preamplifier with Power supply/amplification split design

$2316.16 $1389.7

New Gain Matched Quad (4) Genalex Reissue 12AU7 ECC82 Vacuum Tubes GOLD PINS

$236.59 $141.96

Gain Matched Trio (3) Psvane 12AX7-S ECC83 Gold Pinss Art Series Vacuum Tubes

$128.0 $76.8