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

$175.1 $105.06

Douk Audio P1 PLUS Bluetooth Tube Preamp USB DAC SPDIF Headphone Amp DSD256

$176.0 $105.6

EL34 Vacuum Tube Amplifier Single-ended Class A Bluetooth USB Lossless Tube Amp

$412.57 $247.54

Universal Audio 710TF Microphone Preamp

$484.0 $290.4

Rare NOS Tung Sol 12BH7A Tubes Black Plates O-Get MATCHED & BALANCED 12BH7 L@@K!

$88.0 $52.8

Guitar Tube Preamp Supercharger (SLO)

$184.8 $110.89

Return-HIFI Bluetooth Tube Preamp USB DAC Speaker Receiver D/A Audio Converter

$88.0 $52.8

Bellari VP129 Tube Phono Preamp /Headphone amp W/AC Adapter

$87.96 $52.78

Heathkit W4-AM Tube Amplifier & WA-P2 Preamplifier Restored Re-Capped Excellent!

$673.2 $403.92

Electro-Harmonix 12AU7 Preamp Vacuum Tube 12AU7EH / ECC82

$23.76 $14.26

Bruce Moore The Conductor Series M-1 Tube Preamplifier

$347.6 $208.56

Untested General Electric GE UPX-003B Tube Phono / Mic Mono Preamp ------- Cool!

$35.2 $21.12

XiangSheng 728A Vacuum Tube Preamplifier HIFI EXQUIS 12AT7 12AU7 6Z4 Silver

$386.24 $231.74

FX-AUDIO TUBE-03 Tube Preamplifier GE5654 with Bass &Treble Home Theater -Silver

$39.39 $23.63

Scott Stereomaster 299 Stereo Matsushita Tube Integrated Pre-Amplifier #001898

$990.0 $594.0

Behringer Tube Preamplifier Ultragain T1953 Working from japan

$343.57 $206.15

LOT OF TEN 12AX7 GUITAR AMP PREAMP TUBES SOVTEK 12AX7WA 12AX7WB WXT WC UNTESTED

$19.8 $11.88

FX-Audio Tube-01 Silver Tube Preamp Line Amplifier Amp fxaudio tube01 EXCELLENT

$52.8 $31.68

Synergy SYN-2 Dual Module Tube Preamp

$675.84 $405.5

ART Tube MP Studio Mic Pre Amp Microphone Preamp

$38.72 $23.23

2 NOS Philips ECG Matched Code JAN-5814A 5814 tubes. AT1000 Tested. 1986

$16.72 $10.04

Vintage RCA 12AU7A PLATINUM GRADE Clear Top Preamp Tubes Matched Pair =6189 5814

$30.76 $18.46

FX Audio TUBE-06 Tube Pre Amplifier with USB RCA and Aux Inputs Silver

$85.31 $51.19

LOMO KINAP UP27 UP-27 Microphone TUBE PRE AMPLIFIER PREAMP (Telefunken V killer)

$308.0 $184.8

12au7 Ecc82 Vintage Hifi Audio Preamp Tested 100%

$8.58 $5.15

VAC Renaissance Mk3 - Audiophile Hifi Stereo Tube Preamplifier w PSU + Remote

$3339.6 $2003.76

LOT OF TEN 12AU7 PREAMP TUBES GT GE RCA EH ETC UNTESTED

$52.8 $31.68

Vintage Modified Dynaco PAS-2 Stereo Tube Preamplifier / KT11

$435.6 $261.36

Douk Audio U10 HIFI Vacuum Tube Headphone Amplifier Stereo Preamp Mini Amp

$44.0 $26.4

Vintage Cordovox GX Tube Preamp Amplifier Accordion Guitar Vocals Mic

$167.2 $100.32

TubeOpto 8 – Eight Channel Mic Preamp with ADAT

$330.0 $198.0

EBS ValveDrive DI Preamp ~ Analog Vacuum Tube 9V Live/Studio Bass Preamplifier

$253.44 $152.06

Electro-Harmonix 12AX7 EH Preamp Vacuum Tube

$21.96 $13.18

HiFi Vacuum Tube Preamp 12AX7 2.0 Channel Analog Audio Pre-amplifier DIY KIT

$178.11 $106.87

Behringer MIC500USB Tube Microphone Preamp

$87.12 $52.28

6x 6080 Hi-S SpecialEdition Toshiba ~ UsedVintagePowerAudioTubes ~ Premium 6AS7G

$43.96 $26.38

3 RCA 7308 Tubes

$17.56 $10.54

MASSIVE DIY Preamp 12 Tube Stereo Preamplifier BIG BEAUTIFUL SOUND 100v BEAST

$2463.12 $1477.88

Synergy Morgan AC Tube Preamp Module Refurbished

$263.29 $157.98

Peavey 6505® MH

$420.37 $252.23

NOS Pair Mullard ECC33 ~ 6SN7 1950s Tested STRONG 5K1 B6E D-geter Triode Tubes

$50.6 $30.36

Guitar Tube Preamp BENZIN VH Four

$184.8 $110.89

HiFi Vacuum Tube Preamp Phono Stage Amplifier or MM MC Turntables Headphone Amp

$57.2 $34.32

Jackson JX3 Tube Preamplifier

$330.0 $198.0

Vintage Automatic Electric Tube Preamplifier Amplifier

$176.0 $105.6

Vintage Dynaco PAS 1 Stereo Tube Preamp Working

$264.0 $158.4

1 Brook 12A3 Preamp-tube preamp 1948

$748.0 $448.8

NOS NIB GE 12AY7 Low Noise Matching Pair Microphone Preamp Tubes 6072 n2

$87.12 $52.28

music hall analogue A3 Tube MM/MC Phono preamp with volume-control $1200-list !

$704.0 $422.4

ART TPS II Stereo Tube Preamp System TPSII Mic 2 Preamplifier U243558

$158.04 $94.83

Professional 5-band EQ Equalizer XLR Balanced Tube Preamp Desktop Headphone Amp

$89.05 $53.43

Demco Power Modulator Tube Audio Microphone Preamplifier Pre Amp Satellite CB

$88.0 $52.8

6J1P Tube Preamplifier gold plated components in wooden box 12V DC power supply

$43.12 $25.88

PreSonus Studio Channel Strip w/ PEQ/Compressor/Tube Preamp U243538

$193.6 $116.16

Guitar Tube Preamp MARRON

$184.8 $110.89

Mini Stereo Preamp w/Built-in Tube 4 Zone RCA Audio Switcher Box Headphone Amp

$61.6 $36.96

6J1 Tube Preamp Amplifier Board Pre-amp Headphone Buffer Kits DIY Assortment

$8.26 $4.96

Valvo (Siemens) ECC81 12AT7 Low Noise Preamp Tubes Pair Germany

$52.8 $31.68

DBX 386 Dual Channel Vacuum Tube Microphone Preamp w/Digital Out (USA voltage)

$91.68 $55.01

Art Dual MP, Two Channel Tube Microphone Preamplifier Tested and working fine

$149.6 $89.76

Art Tube MP Studio Microphone Amplifier Preamp New In Box Power Supply Included

$70.41 $42.24

Schiit Valhalla 2 Triode OTL Headphone Amp / Preamp - MINT / LOW HOURS

$208.56 $125.14

Vintage Dynaco PAS-2 Stereo Tube Preamplifier / KT3

$404.76 $242.86

Mini Bluetooth 5.0 Tube Preamp Speaker Receiver Stereo Pre-Amplifier USB Player

$41.36 $24.82

6SN7GTA/B GE NOS NIB Audio Receiver Guitar Preamp Vacuum Tubes Tested Pair

$22.0 $13.2

ART Model 255 Tube Preamp System 2 Channel -WORKS WITH ISSUE FOR REPAIR ONLY .

$110.0 $66.0

NOS NIB GE 6189 12AU7WA Triple Mica Low Noise Preamp Tubes Matching Pair

$44.0 $26.4

Dynaco PAS 3 Vintage Tube Preamplifier ( Circa 1969) ( Fully Tech Tested )

$404.8 $242.88

JJ ECC82 / 12AU7 Preamp Vacuum Tube

$17.56 $10.54

1961 AMPEREX 12AU7 ECC82 Matching Pair Low Noise Preamp Tubes Holland

$79.2 $47.52

Digitech GSP-2101 Studio Tube Preamp/Multi Effects Guitar Processor

$290.4 $174.24

NOS NIB Raytheon JAN 5814A Windmill Getter Low Noise Preamp Tube

$35.21 $21.12

ELEKIT Power Amplifier Vacuum Tube pre-amplifier assembling Kit TU-8550N Silver

$719.67 $431.8

Pair of RCA MI12241 Tube Microphone Preamps

$1583.12 $949.88

New ART Tube MP Studio Tube Microphone Preamp with Metering and OPL FREE RETURNS

$65.56 $39.34

Matched PAIR Sylvania Branded Amperex or Philips 12AX7 ECC83 Preamp Tubes Tested

$42.24 $25.35

SA-1000 Audiophile Tube Preamplifier Audio Electric Tube 4 Inputs U0Z7

$67.91 $40.75

mid 1950's The Fisher Series Eighty 80-T Tube Preamp and Tuner

$154.0 $92.4

Mini Tube Preamplifier with Bluetooth 5.0 / USB SD Play / Headphone Amp / Remote

$54.2 $32.52

ADA MB-1 Tube Bass Guitar Preamp Rack Unit Read

$263.12 $157.88

Pair Sylvania parallel T Plates 6SN7GT tubes. Bottom getters. 2 Hole 103% & 107%

$43.12 $25.88

1953 RCA 12AU7 PLATINUM GRADE Black Plate Preamp Tubes Matched Pair 90% NOS

$35.16 $21.1

Vintage Viking RP83 Recording Playback Tube Preamplifier Preamp Playback Record

$167.2 $100.32

ART Tube MP Project Series Low Noise Microphone Preamp w/Manual & Power Supply

$52.8 $31.68

Art Tube MP Project Series Professional Microphone Instrument Preamplifier Read

$44.0 $26.4

F1T HIFI Tube Tone Preamplifier Bluetooth 5.0 Vocal Sweet Preamplifier 6N2 *3

$99.27 $59.56

HiFi Vacuum Tube Preamp Class A Single-ended XLR Balanced Audio Pre-Amplifier

$696.96 $418.18

Fx-Audio Tube-01J Black Tube Preamp Line Amplifier Nfj Original Model Black

$54.74 $32.85

KEN-RAD 6SN7GT VT-231 Pair Preamp Tubes Test NOS

$88.0 $52.8

MUSIC ANGEL M7 TUBE PREAMPLIFIER

$395.12 $237.08

Telefunken ECC81 12AT7 Low Noise Preamp Tubes Pair Germany

$70.41 $42.24

PreSonus TubePre V2 Single-Channel Tube Preamplifier/DI Box

$140.8 $84.48

8 TUBE AMP/PREAMP DAMPERS FOR 12AX7/12AU7/12AT7/ECC83/EL84/6922/EL84/5751/5687

$7.92 $4.75

NOS NIB GE 12AY7 Low Noise Matching Pair Microphone Preamp Tubes 6072

$87.12 $52.28

Friedman IR-D Dual Tube Preamp

$351.12 $210.68

NOS NIB RCA 5691 Red Base Low Noise Preamp Tube Pair Westinghouse WL 5691 6SL7GT

$176.0 $105.6

RAYTHEON VT-231 JAN-CRP 6SN7GT Preamp Tube Pair Test NOS

$132.0 $79.2

Tung-Sol 12AX7 Preamp Tube Pair

$52.79 $31.67

Hiend MM Riaa Tube Phono Amplifier Base On Ear834 Turntables Preamp (B6-70)

$202.4 $121.44

Fosi Audio Box X1 Hi-Fi Phono Preamp for Turntable MM Phonograph Preamplifier

$17.16 $10.3