1000A - 9999Z
There are many great four digit tubes such as the 7025, 6550, 5654 and 7868. These tubes tend to be high-end versions of standard tubes or variants of standard tubes though there are plenty that just exist on their own.
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New Matched Sextet (6) Psvane KT88-T Classic MKII II Series Vacuum Tubes
Psvane
$609.03New Plate Current Matched Sextet of Psvane KT88-T Classic MKII Series (6550) Vacuum Tubes As one of the most prominent audiophile vacuum tube manufacturers, Psvane’s designs have established a benchmark for clean and accurate sound reproduction,...NP106-6$609.03 -
New Matched Quad (4) Psvane KT88-T Classic MKII II Series Vacuum Tubes
Psvane
$406.75New Plate Current Matched Quad of Psvane KT88-T Classic MKII Series (6550) Vacuum Tubes As one of the most prominent audiophile vacuum tube manufacturers, Psvane’s designs have established a benchmark for clean and accurate sound reproduction,...NP106-4$406.75 -
New Matched Pair (2) Psvane KT88-T Classic MKII Series Vacuum Tubes
Psvane
$203.63New Plate Current Matched Pair of Psvane KT88-T Classic MKII Series (6550) Vacuum Tubes As one of the most prominent audiophile vacuum tube manufacturers, Psvane’s designs have established a benchmark for clean and accurate sound reproduction,...NP106-2$203.63 -
New Psvane KT88-T Classic MKII Series Vacuum Tube
Psvane
$96.68New Plate Current Tested Psvane KT88-T Classic MKII Series (6550) Vacuum Tube As one of the most prominent audiophile vacuum tube manufacturers, Psvane’s designs have established a benchmark for clean and accurate sound reproduction, along with a...NP106-1$96.68 -
New Matched Octet (8) Tung-Sol KT150 Vacuum Tubes
Tung-Sol
$1,002.10New Plate Current Matched Octet of Tung-Sol KT150 Vacuum Tubes With a massive plate dissipation of 70 watts, the Tung-Sol KT150 is the most powerful octal beam tetrode ever produced. A pair of KT150s can allow an amplifier with a power output approaching...NP090-8$1,002.10 -
New Matched Quad (4) Tung-Sol KT150 Vacuum Tubes
Tung-Sol
$505.60New Plate Current Matched Quad of Tung-Sol KT150 Vacuum Tubes With a massive plate dissipation of 70 watts, the Tung-Sol KT150 is the most powerful octal beam tetrode ever produced. A pair of KT150s can allow an amplifier with a power output approaching...NP090-4$505.60 -
New Matched Pair (2) Tung-Sol KT150 Vacuum Tubes
Tung-Sol
$255.34New Plate Current Matched Pair (2) Tung-Sol KT150 Vacuum Tubes With a massive plate dissipation of 70 watts, the Tung-Sol KT150 is the most powerful octal beam tetrode ever produced. A pair of KT150s can allow an amplifier with a power output approaching...NP090-2$255.34 -
New Tung-Sol KT150 Vacuum Tube
Tung-Sol
$119.96New Tung-Sol KT150 Vacuum Tube With a massive plate dissipation of 70 watts, the Tung-Sol KT150 is the most powerful octal beam tetrode ever produced. A pair of KT150s can allow an amplifier with a power output approaching 300 watts to be built. The...NP090-1$119.96 -
New Matched Quad (4) Tung-Sol 7591A Reissue Vacuum Tubes
Tung-Sol
$199.70New Plate Current Matched Quad of Tung-Sol 7591A Reissue Vacuum Tubes Built around the same specs as the original Tung-Sol 7591A, this is the perfect choice for those looking to replace tubes in their Scotts, Harman Kardons, Fischers, or any amp that...NP086-4$199.70 -
New Matched Pair (2) Tung-Sol 7591A Reissue Vacuum Tubes
Tung-Sol
$101.13New Plate Current Matched Pair of Tung-Sol 7591A Reissue Vacuum Tubes Built around the same specs as the original Tung-Sol 7591A, this is the perfect choice for those looking to replace tubes in their Scotts, Harman Kardons, Fischers, or any amp that...NP086-2$101.13 -
New Tung-Sol 7591A Reissue Vacuum Tube
Tung-Sol
$48.43New Plate Current Tested Tung-Sol 7591A Reissue Vacuum Tube Built around the same specs as the original Tung-Sol 7591A, this is the perfect choice for those looking to replace tubes in their Scotts, Harman Kardons, Fischers, or any amp that calls...NP086-1$48.43 -
New Matched Octet (8) Electro-Harmonix 7868 Vacuum Tubes
Electro-Harmonix
$416.50New Plate Current Matched Octet of Electro-Harmonix 7868 Vacuum Tubes Thanks to Electro-Harmonix we have this wonderful new production 7868. This is the one and only new production 7868 currently being made. With a warm, rich tone and a great price point...NP063-8$416.50 -
New Matched Quad (4) Electro-Harmonix 7868 Vacuum Tubes
Electro-Harmonix
$208.51New Plate Current Matched Quad of Electro-Harmonix 7868 Vacuum Tubes Thanks to Electro-Harmonix we have this wonderful new production 7868. This is the one and only new production 7868 currently being made. With a warm, rich tone and a great price point...NP063-4$208.51 -
New Matched Pair (2) Electro-Harmonix 7868 Vacuum Tubes
Electro-Harmonix
$105.54New Plate Current Matched Pair of Electro-Harmonix 7868 Vacuum Tubes Thanks to Electro-Harmonix we have this wonderful new production 7868. This is the one and only new production 7868 currently being made. With a warm, rich tone and a great price...NP063-2$105.54 -
New Electro-Harmonix 7868 Vacuum Tube
Electro-Harmonix
$50.50New Plate Current Tested Electro-Harmonix 7868 Vacuum Tube Thanks to Electro-Harmonix we have this wonderful new production 7868. This is the one and only new production 7868 currently being made. With a warm, rich tone and a great price point they are a...NP063-1$50.50 -
New Matched Pair (2) Electro-Harmonix EF86 Vacuum Tubes
Electro-Harmonix
$65.11New Gain Matched Pair of Electro-Harmonix EF86 (6267) Vacuum Tubes There is finally a new production EF86 and a great audio pentode for many different applications. The vintage EF86s, while having great tone, are notoriously plagued with noise...NP064-2$65.11 -
New Electro-Harmonix EF86 Vacuum Tube
Electro-Harmonix
$31.71New Gain Tested Electro-Harmonix EF86 (6267) Vacuum Tube There is finally a new production EF86 and a great audio pentode for many different applications. The vintage EF86s, while having great tone, are notoriously plagued with noise. Electro-Harmonix...NP064-1$31.71 -
New Matched Quad (4) 6973 Electro-Harmonix Vacuum Tubes
Electro-Harmonix
$136.17New Plate Current Matched Quad of Electro-Harmonix 6973 Vacuum Tubes Thanks to Electro-Harmonix the 6973 is finally affordable and easy to find! This tube has long caused trouble as the originals are so scarce. Many companies were re-branding the less...NP059-4$136.17 -
New Matched Pair (2) 6973 Electro-Harmonix Vacuum Tubes
Electro-Harmonix
$69.55New Plate Current Matched Pair of Electro-Harmonix 6973 Vacuum Tubes Thanks to Electro-Harmonix the 6973 is finally affordable and easy to find! This tube has long caused trouble as the originals are so scarce. Many companies were re-branding the less...NP059-2$69.55 -
New Electro-Harmonix 6973 Vacuum Tube
Electro-Harmonix
$33.80New Plate Current Tested Electro-Harmonix 6973 Vacuum Tube Thanks to Electro-Harmonix the 6973 is finally affordable and easy to find! This tube has long caused trouble as the originals are so scarce. Many companies were re-branding the less powerful...NP059-1$33.80 -
New Matched Quad (4) Electro-Harmonix KT90 Vacuum Tubes
Electro-Harmonix
$318.81New Plate Current Matched Quad of Electro-Harmonix KT90 Vacuum Tubes This tube has a bit more power than a KT88 but with the classic warm, bass-drenched sound of an EL34. The tube really is the best of both worlds. These are drop-in substitutes for a...NP068-4$318.81 -
New Matched Pair (2) Electro-Harmonix KT90 Vacuum Tubes
Electro-Harmonix
$159.66New Plate Current Matched Pair of Electro-Harmonix KT90 Vacuum Tubes This tube has a bit more power than a KT88 but with the classic warm, bass-drenched sound of an EL34. The tube really is the best of both worlds. These are drop-in substitutes for a...NP068-2$159.66 -
New Electro-Harmonix KT90 Vacuum Tube
Electro-Harmonix
$75.58New Plate Current Tested Electro-Harmonix KT90 Vacuum Tubes This tube has a bit more power than a KT88 but with the classic warm, bass-drenched sound of an EL34. The tube really is the best of both worlds. These are drop-in substitutes for a 6550 or KT88...NP068-1$75.58 -
New Matched Quad (4) Electro-Harmonix KT88 Vacuum Tubes
Electro-Harmonix
$269.99New Plate Current Matched Quad of Electro-Harmonix KT88 Vacuum Tubes The Electro-Harmonix KT88 is different than the Electro-Harmonix 6550. While they are both great tubes, the KT88 version is modeled after the British original and has a different...NP067-4$269.99 -
New Matched Pair (2) Electro-Harmonix KT88 Vacuum Tubes
Electro-Harmonix
$135.26New Plate Current Matched Pair of Electro-Harmonix KT88 Vacuum Tubes The Electro-Harmonix KT88 is different than the Electro-Harmonix 6550. While they are both great tubes, the KT88 version is modeled after the British original and has a different...NP067-2$135.26 -
New Electro-Harmonix KT88 Vacuum Tube
Electro-Harmonix
$64.50New Plate Current Tested Electro-Harmonix KT88 Vacuum Tube The Electro-Harmonix KT88 is different than the Electro-Harmonix 6550. While they are both great tubes, the KT88 version is modeled after the British original and has a different internal plate...NP067-1$64.50 -
New Matched Pair (2) Electro-Harmonix 6550 Ceramic Vacuum Tubes
Electro-Harmonix
$132.60New Plate Current Matched Pair of Electro-Harmonix 6550 Ceramic Vacuum Tubes The 6550EH is one of the finest new production tubes for any amp using 6550 or KT88. The 6550EH offers the maximum power of any 6550 with the linearity guitar and bass players...NP057-2$132.60 -
New Electro-Harmonix 6550 Vacuum Tube
Electro-Harmonix
$63.25New Plate Current Tested Electro-Harmonix 6550EH Vacuum Tube The 6550EH is one of the finest new production tubes for any amp using 6550 or KT88. The 6550EH offers the maximum power of any 6550 with the linearity guitar and bass players want. With...NP057-1$63.25 -
New Matched Octet (8) Tung-Sol 6550 Coke Bottle Reissue Vacuum Tubes
Tung-Sol
$559.91New Plate Current Matched Octet of Tung-Sol 6550 (KT88) Coke Bottle Reissue Vacuum Tubes This 6550 has everything its vintage counterpart featured down to the bottle shape and size, three getter construction, gold grids, and carbonized plates. From the...NP047-8$559.91 -
New Matched Quad (4) Tung-Sol 6550 Coke Bottle Reissue Vacuum Tubes
Tung-Sol
$282.45New Plate Current Matched Quad of Tung-Sol 6550 (KT88) Coke Bottle Reissue Vacuum Tubes This 6550 has everything its vintage counterpart featured down to the bottle shape and size, three getter construction, gold grids, and carbonized plates. From the...NP047-4$282.45 -
New Matched Pair (2) Tung-Sol 6550 Coke Bottle Reissue Vacuum Tubes
Tung-Sol
$141.51New Plate Current Matched Pair of Tung-Sol 6550 (KT88) Coke Bottle Reissue Vacuum Tubes This 6550 has everything its vintage counterpart featured down to the bottle shape and size, three getter construction, gold grids, and carbonized plates. From the...NP047-2$141.51 -
New Tung-Sol 6550 Coke Bottle Reissue Vacuum Tube
Tung-Sol
$67.44New Plate Current Tested Tung-Sol 6550 (KT88) Coke Bottle Reissue Vacuum Tube This 6550 has everything its vintage counterpart featured down to the bottle shape and size, three getter construction, gold grids, and carbonized plates. From the construction...NP047-1$67.44 -
New Matched Octet (8) Tung-Sol KT120 Vacuum Tubes
Tung-Sol
$643.41New Plate Current Matched Octet of Tung-Sol KT120 Vacuum Tubes The KT120 is an incredible tube. Essentially a KT88 / 6550 on steroids, they are capable of pushing 150 watts per pair of clean power in a push-pull configuration. Because of the high...NP042-8$643.41 -
New Matched Sextet (6) Tung-Sol KT120 Vacuum Tubes
Tung-Sol
$485.28New Plate Current Matched Sextet of Tung-Sol KT120 Vacuum Tubes The KT120 is an incredible tube. Essentially a KT88 / 6550 on steroids, they are capable of pushing 150 watts per pair of clean power in a push-pull configuration. Because of the high...NP042-6$485.28 -
New Matched Quad (4) Tung-Sol KT120 Vacuum Tubes
Tung-Sol
$324.24New Plate Current Matched Quad of Tung-Sol KT120 Vacuum Tubes The KT120 is an incredible tube. Essentially a KT88 / 6550 on steroids, they are capable of pushing 150 watts per pair of clean power in a push-pull configuration. Because of the high wattage,...NP042-4$324.24 -
New Matched Pair (2) Tung-Sol KT120 Vacuum Tubes
Tung-Sol
$166.12New Plate Current Matched Pair of Tung-Sol KT120 Vacuum Tubes The KT120 is an incredible tube. Essentially a KT88 / 6550 on steroids, they are capable of pushing 150 watts per pair of clean power in a push-pull configuration. Because of the high wattage,...NP042-2$166.12 -
New Tung-Sol KT120 Vacuum Tube
Tung-Sol
$77.27New Plate Current Tested Tung-Sol KT120 Vacuum Tube The KT120 is an incredible tube. Essentially a KT88 / 6550 on steroids, they are capable of pushing 150 watts per pair of clean power in a push-pull configuration. Because of the high wattage, these...NP042-1$77.27 -
New Matched Octet (8) Genalex Gold Lion KT88 Reissue Vacuum Tubes
Genalex
$681.75New Plate Current Matched Octet of Genalex Gold Lion KT88 (6550) Vacuum Tubes These are as close to the original Genalex KT88s as you could possibly get. Made in Russia, they look identical to the originals down to the plate structure. They even have...NP041-8$681.75 -
New Matched Sextet (6) Genalex Gold Lion KT88 Reissue Vacuum Tubes
Genalex
$513.81New Plate Current Matched Sextet of Genalex Gold Lion KT88 (6550) Vacuum Tube These are as close to the original Genalex KT88s as you could possibly get. Made in Russia, they look identical to the originals down to the plate structure. They even have...NP041-6$513.81 -
New Matched Quad (4) Genalex Gold Lion KT88 Reissue Vacuum Tubes
Genalex
$343.20New Plate Current Matched Quad of Genalex Gold Lion KT88 (6550) Vacuum Tubes These are as close to the original Genalex KT88s as you could possibly get. Made in Russia, they look identical to the originals down to the plate structure. They even have gold...NP041-4$343.20