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6550 Quad


Brand New Matched Quad (4) Genalex Gold Lion Reissue KT88 / 6550 Vacuum Tubes

$173.06


NOS MATCHED QUAD Tung Sol Style 6550 Tube Shuguang Beijing Made 80's KT88

$64.99


Matched Quads (4 tubes) Tung Sol 6550 Reissue amp tubes, BRAND NEW

$118.10


KT90 EH Matched Cryo Treated Quad (4) 6550 KT88

$189.99


New Current Matched Quad (4) Psvane KT88 (6550) HiFi Series Vacuum Tubes Hi-Fi

$124.95


Brand New Current Matched Quad (4) Electro-Harmonix 6550 Ceramic Vacuum Tubes

$124.98


New Plate Current Matched Quad (4) Tung-Sol Reissue 6550 KT88 Coke Bottle Tubes

$128.00


KT88 Matched Quad Electro Harmonix + Cryo Treated Vacuum Tubes- 4 6550 KT90

$169.99


Tung Sol 6550 Cryo Matched Quad (4) - KT88

$179.99


Tung Sol KT120 Cryo Matched Quad (4) - 6550 / KT88

$199.99


NOS PHILIPS ECG JAN USA 6550 AMPLITREX TUBES MATCHED QUAD!

$798.00


Quad of Tung-Sol (GE label) 6550 KT88 NOS NIB Solid Gray Plate 1961 Vacuum Tubes

$1,100.00


Brand New Current Matched Quad Svetlana 6550 / 6550C (KT88) Reissue Vacuum Tubes

$129.50


New JJ Electronic OEM KT88 Tubes Valves, Matched Quad KT-88 6550 KT 88

$99.99


Factory Matched Quad Tube Amp Doctor TAD KT88 6550 For Tube Amplifiers Citation

$199.00


QUAD of General Electric GE 6550A tubes ~ test NOS...OUTSTANDING!

$610.00


Tung-Sol 6550 Original Issue Tubes, Matched Quad - Tested, NOS

$650.00


Matched Quads (4 tubes) Electro Harmonix 6550 6550EH large tubes, NEW

$111.24


Matched Quad (4) original Svetlana SED 6550C, AT1000 Tested, mid-1990s

$294.00


MATCHED QUAD - SVETLANA 6550 / 6550C (KT88) VACUUM TUBES - CURRENT MATCHED!

$124.50


Tung Sol KT150 Cryo Matched Quad (4) KT88 6550 KT90 KT120

$389.99


KT88 JJ Cryo Treated Matched Quad (4) 6550 KT90

$189.99


Factory Matched QUAD Svetlana KT88SV 6550 KT88 - For Tube Amplifiers

$160.00


Matched Quads Svetlana 6550 6550C amp tubes, BRAND NEW

$125.00


Factory Matched Quad Tube Amp Doctor TAD 6550 6550A KT88 - GE 6550A Remake

$180.00


Mullard KT88 Cryo Treated and Matched Quad - (4) 6550 KT90

$179.99


Electro Harmonix Factory Plat Matched 6550 6550EH Vacuum Tubes QUAD 24hr Burn-in

$119.95


4x NEW Ruby 6550A-STR 6550ASTR Vacuum Tubes, Matched Quad TESTED

$143.75


New Current Matched Quad (4) JJ Electronic 6550 Vacuum Tubes

$161.98


KT88(6550)Cryogenic Valve Art tubes matched pair 2 pcs. quads available.

$89.90


New Premium Select NessTone 6550 Power Tube Matched Quad - Big, Clean Warm Bass

$89.99