KT88 - 6550 -KT90 - KT120 - KT150 - KT170
The KT90, KT120 and KT150 are all tubes that were designed in the modern era. They are all loosely based on the KT88 but with much more power. You can always sub a KT150 for a KT120 or KT90 but never the other way around. The KT88 and 6550 are always interchangeable.
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New JJ KT88 Vacuum Tube
JJ Electronic
$63.86New Plate Current Tested JJ KT88 Vacuum Tube JJ is an undisputed leader in modern vacuum tube manufacturing, and for good reason. In the power stage, their KT88 (6550) is an industry favorite, as it provides excellent sonic performance along with great...NP109-1$63.86 -
New Matched Octet (8) Psvane KT88-T Classic MKII II Series Vacuum Tubes
Psvane
$808.41New Plate Current Matched Octet 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,...NP106-8$808.41 -
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) 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 -
New Matched Pair (2) Genalex Gold Lion KT88 Reissue Vacuum Tubes
Genalex
$171.84New Plate Current Matched Pair 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...NP041-2$171.84 -
New Genalex Gold Lion KT88 Reissue Vacuum Tube
Genalex
$81.77New Plate Current Tested 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 gold plated...NP041-1$81.77 -
New Matched Octet (8) Svetlana 6550C [KT88] Vacuum Tubes
Svetlana
$534.91New Plate Current Matched Octet of Svetlana 6550C Vacuum Tubes An excellent true 6550 that'll make your amp sing. These are known for their robust quality and classic American 6550 tone. Will work in place of: 6550C, 6550, KT88, 6550A Testing...NP022-8$534.91 -
New Matched Quad (4) Svetlana 6550C [KT88] Vacuum Tubes
Svetlana
$269.99New Plate Current Matched Quad of Svetlana 6550C Vacuum Tubes An excellent true 6550 that'll make your amp sing. These are known for their robust quality and classic American 6550 tone. Will work in place of: 6550C, 6550, KT88, 6550A Testing...NP022-4$269.99 -
New Matched Pair (2) Svetlana 6550C [KT88] Vacuum Tubes
Svetlana
$135.26New Plate Current Matched Pair of Svetlana 6550C Vacuum Tubes An excellent true 6550 that'll make your amp sing. These are known for their robust quality and classic American 6550 tone. Will work in place of: 6550C, 6550, KT88, 6550A Testing...NP022-2$135.26 -
New Svetlana 6550C [KT88] Vacuum Tube
Svetlana
$64.50New Plate Current Tested Svetlana 6550C Vacuum Tube An excellent true 6550 that'll make your amp sing. These are known for their robust quality and classic American 6550 tone. Will work in place of: 6550C, 6550, KT88, 6550A Testing and/or...NP022-1$64.50