Pro-Ject Tube Box S2 Pure-Tube MM/MC Phono Preamplifier (Black)

$439.12 $263.48

Fosi Audio GR40 Tube Preamp w/DAC Stereo Headphone Amplifier for Active Speakers

$105.6 $63.36

HiFi Remote Control 12AU7/ECC82 Tube Preamplifier Refer US CARY-SLP90 Circuit

$215.6 $129.36

Hifi Remote Version ECC83+ ECC81 Stereo Tube Preamplifier Base on Matisse preamp

$183.04 $109.83

6-12AX7/7025 "The New Tube" Clean! Hickok Test GOOD! Blk Plates! Halo Getters!

$88.0 $52.8

Douk Audio Vacuum Tube Preamp Home Stereo Audio Pre-Amplifier DIY Kit / Finished

$218.59 $131.15

RCA Black Plate 12AX7 Quad Strong to NOS Preamp Tubes

$264.0 $158.4

ART Tube MP Studio Tube Microphone Preamp with Analog VU Meter NO Power supply

$35.2 $21.12

RHINO AUDIO VA1 Vacuum Tube Headphone Amplifier /NEW /audiophile DARKVOICE 336SE

$215.6 $129.36

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

$263.12 $157.88

ART Tube MP Project Series PS Tube Microphone/Instrument Preamp OPEN BOX

$88.86 $53.32

ART TPS II 2-channel Tube Microphone Preamp (2-pack) Bundle

$510.39 $306.23

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

$61.6 $36.96

12AX7 Telefunken Ribbed Plate Preamp2/TV7 Tested ( 1 ) Tube Lot

$176.0 $105.6

AMPEREX ECC83 12AX7 LEGENDARY WEST GERMAN GLOBES SMOOTH PLATES MATCHING SET

$171.86 $103.12

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

$386.24 $231.74

Nice Vintage STROMBERG CARLSON AV-52 Tube Preamp

$263.96 $158.38

Ampapa A1 HIFI 5654 Tube Phono Stage for Turntables Stereo Audio Preamp Home Amp

$108.41 $65.05

CUSTOM PREAMP LINE STAGE MU FOLLOWER 37 TUBE DIY TOTL AUDIOPHILE

$880.0 $528.0

Return-HiFi 12AX7 Vacuum Tube Preamp 2.0 Channel Home Stereo Audio Preamplifier

$176.0 $105.6

New In Box Alctron MP100 Professional Tube Microphone Preamplifier Preamp

$264.0 $158.4

Mini HiFi Vacuum Tube Preamp Stereo for Turntable Stereo Record Player Amp

$54.2 $32.52

Suca Audio Tube-T1 Preamp Tone Control + Extra Tubes

$32.56 $19.54

Universal Audio SOLO 610 Tube Mic Pre B-Stock w/ FULL WARRANTY

$787.6 $472.56

ALESIS Mictube Duo Stero Tube Preamp 0694318012192 UNTESTED PARTS ONLY

$69.52 $41.72

ROGUE AUDIO RP-1 Tube Preamp/phono/Headphone Amp AUTHORIZED-DEALER $1800 List !

$1232.0 $739.2

12AT7 Vacuum Tube Siemans ECC81 Audio HiFi Preamps Amp Mixers R-Players Ham.

$31.68 $19.01

HH Scott 222C Stereo Tube Amp Setereomaster Preamp Recapped=Restored 20W 60s

$1139.6 $683.76

JOYO 20W 2 Channel Guitar Amplifier Mini Amp Head Tube Preamp with Footswitch

$139.04 $83.43

Douk Audio T9 Tube Phono Stage Preamp MM/MC 6E2 Level Meter Stereo Preamplifier

$114.4 $68.64

Sansui PR-330 Tube Preamp Tuner for Parts/Repair Vintage 1950's Receiver

$259.61 $155.77

Groove Tubes GT Trio Guitar Preamp with Foot Switch; Clean, Mean...and Scream

$1540.0 $924.0

Amperex PQ 7308 / ECC88 / 6922 Gold Pin *Amplitrex Tested* 1961 Date Code

$66.0 $39.6

Cayin SC-6LSMK2 Stereo Vacuum Tube Preamplifier audio preamplifier

$1319.12 $791.48

DBX 676 Microphone Channel Strip w/Tube Pre 3-Band Parametric EQ Compressor/Lmtr

$818.4 $491.04

Vintage Modified Dynaco PAS-2 Stereo Tube Preamplifier / KT9

$435.6 $261.36

ART CLEANBox Pro Two Channel Pro/Consumer Level Converter

$61.52 $36.91

New 1x JJ Electronics 12AX7 / ECC83 | One / Single Tube | Free Ship

$19.14 $11.49

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

$158.4 $95.04

Douk Audio P2 Vacuum Tube Preamp HiFi Bluetooth USB Player Headphone Amplifier

$61.6 $36.96

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

$70.36 $42.22

NOS NIB GE JG-5814A 12AU7 ECC82 Low Noise Preamp Tubes

$44.0 $26.4

ART Solo Studio Multi-voice Channel Strip

$264.0 $158.4

Western Electric 418A tube. Code 70 52. Test 22,750 mhos, chart min is 13000.

$34.32 $20.6

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

$38.87 $23.33

12AH7 NU Valve Vintage Hifi Audio Preamp Tested 100% Nos

$8.58 $5.15

RCA Mixer OP-7 Tube AmpRepair/Parts AS IS NO TEST NO RETURN Daven Attenuator

$702.24 $421.35

Viewlex BQ-5A Tube Microphone Mixer, Microphone Preamp, Milspec - MINT CONDITION

$1320.0 $792.0

Alembic F-1X Tube Pre Microphone PREAMP - USED - PERFECT CIRCUIT

$1143.13 $685.88

Rare Telefunken 6DJ8 ECC88 Tube Amplitrex Tested L@@K!

$30.8 $18.48

Nobsound Mini Vacuum Tube Preamp Tone Control Bass Stereo Audio Preamplifier

$41.36 $24.82

Victory Sonics 2 Channel Tube Preamp. No Case, No Tube, Board Only - Used

$44.0 $26.4

Schiit Valhalla 2 Triode OTL Headphone Amp / Preamp- Silver

$165.0 $99.0

Dennis Had Inspire LP-396-P Stereo Tube Preamplifier

$2587.2 $1552.32

FISHER Mono AM/FM Tube Tuner Preamp Tube Early 50's 50R

$132.0 $79.2

Art Voice Model 165 Voice Tube Channel Strip With Digital Connectivity

$374.0 $224.4

DYNA PAS STEREO TUBES PREAMPLIFIER

$527.12 $316.28

Vintage Heath Heathkit WA-P2 Tube HiFi Preamp Preamplifier (EXCELLENT)**

$69.52 $41.72

8 SOVTEK 6922 6DJ8 Preamp Tubes

$39.6 $23.76

PRESONUS TUBE PRE (P19000358)

$22.0 $13.2

VINTAGE RCA 5879 PENTODE PREAMP TUBE WITH BOX TESTS GOOD

$10.56 $6.34

Mesa Boogie V-Twin Overdrive Tube Preamp Pedal Guitar Effects JUNK

$194.48 $116.69

Douk Audio P1PLUS Bluetooth Tube Preamp USB DAC Headphone Amp w/VU Meter DSD256

$165.44 $99.26

Triad | 9431 Tube Preamp Power Transformer

$43.12 $25.88

JJ ECC81 / 12AT7 Preamp Vacuum Tube

$17.56 $10.54

Douk T8PRO 7-Band Tube EQ Equalizer Stereo Balanced XLR / RCA Preamp for Speaker

$114.4 $68.64

JJ ECC803s / Hi-Performance 12AX7 Preamp Vacuum Tube

$20.2 $12.12

Akai M-7 tube pre-amp/amp for guitar, tested

$132.0 $79.2

Soldano X88-IR Rackmount Tube Guitar Preamp

$2200.0 $1320.0

ADA MP-1 Guitar Preamp Rack Unit Programmable Tube Preamp With Pedal Board

$787.6 $472.56

80's Ada mp-1 tube guitar preamp, Microcab II, B200s power amp in SKB case. Rack

$1056.0 $633.6

(2) RCA 6SL7GT SMOKE GLASS AUDIO PREAMPLIFIER TUBES - TV7 TESTED

$22.0 $13.2

ESTATE*$ale UNICORNS SUPER RARE HEATHKIT W-6M TUBE AMPS w/CAGES & PREAMPS ~uTUBE

$5628.48 $3377.09

Musical Fidelity X-10 V3 Tube Output Buffer

$289.52 $173.72

T5 6J3 Vacuum Tube Bluetooth Preamplifier, Mini Hi-Fi Stereo Preamp with Treble

$56.32 $33.79

T8 6n3 Digital Tube Preamplifier Bluetooth 5.0 Hifi Headphone Preamp Decoder Pre

$127.63 $76.58

2 x Siemens Germany 12AX7 ECC83 Preamp / Audio Tubes ~ Vintage Holy Grail 1960s

$333.52 $200.12

MULLARD 12AX7 ECC83 Low Noise Preamp Tube Blackburn UK The Fisher

$52.8 $31.68

Friedman IR-X Dual Tube Preamp and DI

$374.0 $224.4

1 X Electro Harmonix 12DW7 / 12DW7EH pre-amp tube, Brand New in Box

$30.04 $18.03

Audio Tube Preamp

$8.81 $5.28

5Ar4 Gz34 Rectifier Valve Vintage Hifi Audio Amplifier

$9.83 $5.9

HiFi Vaccum Tube MM Phono Preamp Stereo Audio Pre-amplifier for Turntables

$40.48 $24.29

PreSonus TubePre pre-amplifier

$30.8 $18.48

Audio Presmp

$61.6 $36.96

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

$23.2 $13.92

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

$307.96 $184.78

surgex sx-1115 and art tube pre amp system in SKB molded Hard Case U Get Both

$87.12 $52.28

12AX7 Sylvania Audio Receiver Pre-Amp Vacuum Tubes Tested Pair

$31.68 $19.01

Simplex IPC AM-1010 Volume Control Amp Preamp 1620 Tube Western Electric era

$123.2 $73.92

DP-60L Tube Preamplifier ECC82+ECC83 Tube Preamp Base On Jadis Circuit

$456.72 $274.03

Schiit Audio Freya+ Tube Hybrid Preamplifier; Solid State Only

$659.12 $395.48

Groove Tubes Gold Series GT-12AT7 Preamp Tube

$26.4 $15.84

Electro-Harmonix 12AY7 EH / 6072A Preamp Vacuum Tube

$23.72 $14.23

DIY Hifi 6J4+ 6P6P Tube Preamplifier Kit Vacuum Tube Preamp 4 ways input BT 5.0

$165.44 $99.27

DYNACO/Dynakit PAS-3X Tube Preamplifier Tubes Included - Works, Watch Video

$439.12 $263.48

EKJapan EK-JAPAN ELEKIT TU-8500 Vacuum Tube Pre-amp Kit White Phonoequalizer

$383.71 $230.23

McIntosh C4 Audio Compensator Vintage Mono Tube Preamplifier + D-8A Power Supply

$1231.13 $738.68

Finished 12AX7 12AU7 Tube Preamplifier HiFi Pre-Amp Shigeru Wada Japan Circuit

$156.65 $93.99

HIFI PRT07B Remote Tube Preamplifier With 4 Way RCA Input Base On Marantz 7 (M7)

$165.44 $99.26