Brand New In Box Current Matched Octet (8) Electro-Harmonix KT88 Vacuum Tubes

$533.65 $320.19

New Current Matched Pair (2) Electro-Harmonix 300B Gold Pins Ceramic Tubes

$256.5 $153.9

Dumont Code Matched 6681/12AX7 Vacuum Tube Pair Premium Ruggedized 12AX7 Valve

$184.8 $110.89

Gain Matched Sextet (6) Sovtek 12AX7WA 7025 ECC83 Vacuum Tubes - Brand New

$136.17 $81.7

Genalex - Gold Lion B749 / ECC82 / 12AU7 Preamp Vacuum Tube

$55.4 $33.24

ROGUE AUDIO RP5 Tube Preamp/MM/MC Phono/Headphone $3500 List! AUTHORIZED-DEALER

$2199.12 $1319.48

Warm Audio WA-MPX 1-channel Tube Mic/Line/Instrument Preamp

$593.21 $355.93

Hafler Vacuum Tube Midi Tube Preamplifier A High-Quality Tube Preamplifier From

$396.8 $238.08

12AU7 / ECC82 Preamp Vacuum Tube

$35.35 $21.21

Mini Class A Vacuum Tube Phono Preamplifier Record Player MC Turntable Preamp

$82.72 $49.63

Electro-Harmonix 12AX7EH Preamp Tube

$21.96 $13.18

Ek Japan Tu-875 Tu-870 Vacuum Tube Preamp Power Amplifier

$556.87 $334.12

Pair Of Millard 6AU6A Made For Daystrom Pre-Amp Vacuum Tube Tested

$17.61 $10.56

AMPEREX 12AX7 ECC83 BUGLE BOY HEERLEN HOLLAND RIBBED PLATES MATCHING SET NIB

$410.47 $246.29

Brand New Current Matched Quad (4) Sovtek 6L6WXT+/ 6L6GC Vacuum Tubes

$171.26 $102.76

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

$330.02 $198.02

Guyatone HGP-1 Hyper Instrument Processor Tube Preamp Made in JAPAN Tested 100V

$271.92 $163.15

Brand New Current Matched Quad (4) Electro-Harmonix EL84 6BQ5 Vacuum Tubes

$93.39 $56.04

Vintage Philips ECG 12AT7WC Preamp Tube ECC81 Valve #124

$26.04 $15.62

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

$40.08 $24.05

Little Dot MK II Vacuum Tube Headphone Amplifier Pre-amplifier HiFi Audio Amp SZ

$149.26 $89.56

AIYIMA Tube T6 PRO Bluetooth 5.0 Tube Preamplifier Hi-Fi Headphone Amp Vacuum...

$127.9 $76.74

1 x RCA 12AT7 preamp tube, Black Plate, D getter, Tested Good ! (3)

$11.26 $6.76

Pre Amp Stereo Tube Drive Phono Preamp for Turntable Amplifier

$18.93 $11.36

PreSonus Studio Channel

$285.12 $171.07

ART Tube MP Mic Preamp - TUBEMP Preamplifier--a10

$44.0 $26.4

Vintage RCA 12AX7 Preamp Tube ECC83 Valve #161

$26.04 $15.62

General Electric 12AU7A Vacuum Tubes - Tested NOS 2 Matched Pair

$52.8 $31.68

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

$78.4 $47.04

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

$200.46 $120.28

Pair of Tung-Sol EF806 SG/6267 Gold Pin Preamp Vacuum Tube

$132.15 $79.29

BALANCED GAIN (95.5, 95.8) MAXI-PREAMP TESTED MULLARD REISSUE 12AX7 / ECC83 TUBE

$42.2 $25.32

RCA 6SN7GT Black Plates [] Getter AUDIO PREAMP VACUUM TUBE Tested USA F.1298-D

$52.76 $31.66

PreSonus Studio Channel Tube Channel Strip

$316.8 $190.08

Nice New? Mullard 7788 E180F / Old Vintage Ham Radio Preamp Tube Audio Amp

$17.6 $10.56

Phono Preamp for Turntable Stereo Tube Amplifier High Fidelity

$19.59 $11.75

PJ Miaolai D2 HiFi Tube Headphone Amplifier

$26.4 $15.84

Hi-End M7 Vacuum Tube HiFi Stereo Marantz 7 Preamp Assembled Board(Without Tube)

$59.84 $35.91

Tube Preamp Vacuum Headphone Electron Valve Amplifier

$26.12 $15.68

Linsoul Xduoo MT-604 Tube + Transistor Hybrid Headphone Amplifier Pre-Amplifier

$121.08 $72.65

ELEKIT Vacuum Tube Preamp Kit TU-8500 ELEKIT EK Japan

$645.48 $387.29

Pair of Tung-Sol 12AX7 New Production Preamp Vacuum Tube

$50.96 $30.58

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

$21.12 $12.68

Closely Matched Pair GE 6V6GT Label Bogen Tested Good Tube

$33.84 $20.31

13DR7 GE Rebrand Audio Receiver Preamplifier Metal Vacuum Tubes Tested Trio

$22.88 $13.73

2 Westinghouse 7N7 NOS/NIB Vacuum Tube Pair .Close Matched 1965 Pair

$51.92 $31.16

Drawmer 1960 2-Channel Mic Preamp Vacuum Tube Compressor

$1012.0 $607.2

ART TPS II Tube Preamplifier System- New! - Free US Ship* - ProSoundUniverse.

$255.2 $153.12

6SD7GT Emerson NOS NIB Audio Receiver Sealed Vacuum Tubes Trio

$29.04 $17.42

AMPEREX 6DJ8/ECC88 Large O Getter AUDIO PREAMP VACUUM TUBE Tested 7.1338-D

$26.36 $15.82

Genalex Gold Lion B739 / 12AT7 / ECC81 Vintage Preamp Tube Tested England

$835.12 $501.08

6X4 A Sylvania Vacuum Tube EZ90 CV493 VTG Preamp Amp Mixers Radios Tested Great.

$10.56 $6.34

FX-AUDIO TUBE-01J Black Tube Preamp Line Amplifier NFJ Original Model Black

$70.84 $42.51

JJ Electronics 12AU7 / ECC82 Preamp Vacuum Tube

$22.0 $13.2

DBX 386 Dual Vacuum Tube Mic Preamp with digital out w/ orig. box(Pro Serviced)

$286.0 $171.6

SYLVANIA 12AU7 Vacuum tube

$10.56 $6.34

1 x Ultron ECC88 - 6DJ8 Test GOOD Preamp Double Triode 1960s Preamp Vacuum Tube

$21.64 $12.98

DC 12V-16V HiFi 6K4 Tube Preamplifier Tube Preamp Audio Amp Home Theater DIY

$22.25 $13.35

XDUOO MT-603 12AU7 Tube Multiple Pre-Amp 4 Audio Input 1 Audio Output Amplifier

$90.29 $54.18

Closely Matched Pair Sylvania JAN-6189 12AU7 ECC82 Same Date NOS NIB Tube

$42.64 $25.59

DC12V-16V HiFi 6K4 Tube Preamplifier Preamp Audio Amp Home Theater Assembly DIY

$20.32 $12.2

2 NOS 1964 PhilipsAmperex BugleBoy 6DJ8 ECC88 Heerlen ~ RodeMic K2/NTK PreAmp+

$171.6 $102.96

1pc SE6550 Vacuum Tube Amplifier Preamp Audio Class A HIFI Single Ended

$426.84 $256.11

Electro-Harmonix 12AT7 Preamp Vacuum Tube 12AT7EH / ECC81

$23.76 $14.26

Hifi Vacuum Tube Buffer Preamp board / Kit Base on Ground Grid GG Preamplifier

$15.84 $9.51

Psvane 6SN7GT Vacuum Tube rectifier HIFI for Aduio Amplifier (Matched Pair)

$48.4 $29.04

Upgraded 6K4 Tube Preamplifier HiFi Tube Preamp Audio Amp Home Theater DIY USA

$23.2 $13.92

Phono Amplifier for Turntable Pre Home Audio Vacuum Preamplifier Tube

$18.93 $11.36

Type 56 Silvertone Globe Balloon Audio Receiver Preamplifier Vacuum Tube Tested

$21.12 $12.67

Tube Lamp Phono Stereo Preamp

$748.0 $448.8

Used amp tubes - 12AX7’s & 6550’s

$68.64 $41.19

2pcs ShuGuang Vacuum Tube New 12AX7B Valve audio amplifier Preamp

$26.4 $15.84

NOS SYLVANIA 6AN8 Audio PREAMPLIFIER VACUUM TUBE Tested Strong USA 4.2916-D

$17.56 $10.54

PRT-07A Tube HIFI Preamplifier Vacuum Tube Preamp Board Base On Marant 7 Circuit

$26.4 $15.84

Electro-Harmonix 12BH7 EH Preamp Vacuum Tube

$27.24 $16.35

Pair JJ ECC 803S and ECC 83S ECC83 12AX7 Tested Good Tube

$25.04 $15.03

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

$66.76 $40.06

Nady TMP1 Tube Amp

$30.8 $18.48

Telefunken 12AX7 ECC83 Diamond Ribbed Plate Tested Strong Balanced Section Tube

$60.24 $36.15

NOBSOUND HIFI Vacuum tube preamplifier stereo 4 Way audio switch box desktop hea

$91.7 $55.02

SOVTEK 6SN7 MATCHED TRIODE PREAMP TUBE BRAND NEW HIGH QUALITY TESTED STOCK

$26.4 $15.84

ART USB Dual Pre 2 Channel Preamp w/ 9V Alkaline Battery & XLR Cable

$88.0 $52.8

GE 12AU6 A 8426 VACUUM TUBE WHITE LABEL MATCH PAIR SUPER SWEET TONE

$3.42 $2.05

Tube Preamp Vacuum Tube Valve Preamp Phono Preamp For Turntable

$28.15 $16.89

Closely Matched Pair Mullard EL34 Code Xf2 B2L4 Same Date Tested Good Tube

$262.64 $157.59

Douk Audio D2 Preamp Amplifier

$26.4 $15.84

Dynavox Tube Phono Preamplifier TPR-2 MM MC Line Black

$230.76 $138.46

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

$29.57 $17.75

6CG7 Vacuum Tubes Sylvania 6FQ7Preamp Audio HiFi Amp Amp Mixers Stereo Tuners.

$44.0 $26.4

DIY Part Preamp Tube Board Vacuum Preamplifier for Home Theater System

$18.94 $11.37

Vintage McIntosh MX110Z 6D10 GE Vacuum Tube Pair Tested Great! Preamp WOW

$35.2 $21.12

Russian ECC88 USSR Single Preamp Vacuum Tubes Used & Tested

$13.2 $7.92

Closely Matched Pair RCA 6F8G NOS NIB Tested Strong Balanced Tube

$86.64 $51.99

Pair NOS 6BZ8 / 6BC8 Hifi Audio Vacuum TUBEs Dac Otp Preamp Hifi RCA & Philco

$19.8 $11.88

6J1 Vacuum Electron Preamp Tube Headphone Amplifier Kitfor Tube Preamp 6AK5 6AU6

$13.5 $8.1

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

Hafler Vacuum Tube Midi Tube Preamplifier A High-Quality Tube Preamplifier USED

$395.12 $237.07

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

$330.02 $198.02