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 Current Matched Pair (2) JJ KT88 Vacuum Tubes
JJ Electronic
$139.63New Current Matched Pair of JJ KT88 Vacuum Tubes 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...NP109-2$139.63 -
New JJ KT88 Vacuum Tube
JJ Electronic
$66.52New 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$66.52 -
New Matched Octet (8) Psvane KT88-T Classic MKII II Series Vacuum Tubes
Psvane
$842.06New 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$842.06 -
New Matched Sextet (6) Psvane KT88-T Classic MKII II Series Vacuum Tubes
Psvane
$634.58New 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$634.58 -
New Matched Quad (4) Psvane KT88-T Classic MKII II Series Vacuum Tubes
Psvane
$423.86New 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$423.86 -
New Matched Pair (2) Psvane KT88-T Classic MKII Series Vacuum Tubes
Psvane
$212.22New 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$212.22 -
New Psvane KT88-T Classic MKII Series Vacuum Tube
Psvane
$100.60New 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$100.60 -
New Matched Octet (8) Tung-Sol KT150 Vacuum Tubes
Tung-Sol
Now: $939.38Was: $1,043.76New 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...NP090-8Now: $939.38Was: $1,043.76 -
New Matched Sextet (6) Tung-Sol KT150 Vacuum Tubes
Tung-Sol
Now: $707.72Was: $786.36New Plate Current Matched Sextet 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...NP090-6Now: $707.72Was: $786.36 -
New Matched Quad (4) Tung-Sol KT150 Vacuum Tubes
Tung-Sol
Now: $474.25Was: $526.94New 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...NP090-4Now: $474.25Was: $526.94 -
New Matched Pair (2) Tung-Sol KT150 Vacuum Tubes
Tung-Sol
Now: $239.67Was: $266.30New 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...NP090-2Now: $239.67Was: $266.30 -
New Tung-Sol KT150 Vacuum Tube
Tung-Sol
Now: $112.35Was: $124.83New 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...NP090-1Now: $112.35Was: $124.83 -
New Matched Octet (8) Tung-Sol 7591A Reissue Vacuum Tubes
Tung-Sol
Now: $374.09Was: $415.66New Plate Current Matched Octet 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...NP086-8Now: $374.09Was: $415.66 -
New Matched Sextet (6) Tung-Sol 7591A Reissue Vacuum Tube
Tung-Sol
Now: $282.57Was: $313.97New Plate Current Matched Sextet 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...NP086-6Now: $282.57Was: $313.97 -
New Matched Quad (4) Tung-Sol 7591A Reissue Vacuum Tubes
Tung-Sol
Now: $187.31Was: $208.12New 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...NP086-4Now: $187.31Was: $208.12 -
New Matched Pair (2) Tung-Sol 7591A Reissue Vacuum Tubes
Tung-Sol
Now: $94.94Was: $105.49New 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...NP086-2Now: $94.94Was: $105.49 -
New Tung-Sol 7591A Reissue Vacuum Tube
Tung-Sol
Now: $45.43Was: $50.48New 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...NP086-1Now: $45.43Was: $50.48 -
New Matched Octet (8) Electro-Harmonix 7868 Vacuum Tubes
Electro-Harmonix
Now: $352.09Was: $391.21New 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...NP063-8Now: $352.09Was: $391.21 -
New Matched Sextet (6) Electro-Harmonix 7868 Vacuum Tubes
Electro-Harmonix
Now: $266.07Was: $295.63New Plate Current Matched Sextet 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...NP063-6Now: $266.07Was: $295.63 -
New Matched Quad (4) Electro-Harmonix 7868 Vacuum Tubes
Electro-Harmonix
Now: $176.30Was: $195.89New 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...NP063-4Now: $176.30Was: $195.89 -
New Matched Pair (2) Electro-Harmonix 7868 Vacuum Tubes
Electro-Harmonix
Now: $89.44Was: $99.38New 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...NP063-2Now: $89.44Was: $99.38 -
New Electro-Harmonix 7868 Vacuum Tube
Electro-Harmonix
Now: $42.85Was: $47.61New 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...NP063-1Now: $42.85Was: $47.61 -
New Matched Quad (4) Electro-Harmonix EF86 Vacuum Tubes
Electro-Harmonix
Now: $119.41Was: $132.68New Gain Matched Quad 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...NP064-4Now: $119.41Was: $132.68 -
New Matched Trio (3) Electro-Harmonix EF86 Vacuum Tubes
Electro-Harmonix
Now: $90.30Was: $100.33New Gain Matched Trio 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...NP064-3Now: $90.30Was: $100.33 -
New Matched Pair (2) Electro-Harmonix EF86 Vacuum Tubes
Electro-Harmonix
Now: $61.17Was: $67.97New 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...NP064-2Now: $61.17Was: $67.97 -
New Electro-Harmonix EF86 Vacuum Tube
Electro-Harmonix
Now: $29.81Was: $33.12New 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...NP064-1Now: $29.81Was: $33.12 -
New Matched Quad (4) 6973 Electro-Harmonix Vacuum Tubes
Electro-Harmonix
Now: $127.73Was: $141.92New 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...NP059-4Now: $127.73Was: $141.92 -
New Matched Pair (2) 6973 Electro-Harmonix Vacuum Tubes
Electro-Harmonix
Now: $65.33Was: $72.59New 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...NP059-2Now: $65.33Was: $72.59 -
New Electro-Harmonix 6973 Vacuum Tube
Electro-Harmonix
Now: $31.76Was: $35.29New 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...NP059-1Now: $31.76Was: $35.29 -
New Matched Octet (8) Electro-Harmonix KT90 Vacuum Tubes
Electro-Harmonix
Now: $593.13Was: $659.03New Plate Current Matched Octet 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...NP068-8Now: $593.13Was: $659.03 -
New Matched Sextet (6) Electro-Harmonix KT90 Vacuum Tubes
Electro-Harmonix
Now: $444.66Was: $494.07New Plate Current Matched Sextet 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...NP068-6Now: $444.66Was: $494.07 -
New Matched Quad (4) Electro-Harmonix KT90 Vacuum Tubes
Electro-Harmonix
Now: $299.11Was: $332.34New 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...NP068-4Now: $299.11Was: $332.34 -
New Matched Pair (2) Electro-Harmonix KT90 Vacuum Tubes
Electro-Harmonix
Now: $149.81Was: $166.46New 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...NP068-2Now: $149.81Was: $166.46 -
New Electro-Harmonix KT90 Vacuum Tube
Electro-Harmonix
Now: $70.79Was: $78.66New 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...NP068-1Now: $70.79Was: $78.66 -
New Matched Sextet (6) Electro-Harmonix KT88 Vacuum Tubes
Electro-Harmonix
Now: $379.01Was: $421.12New Plate Current Matched Sextet 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...NP067-6Now: $379.01Was: $421.12 -
New Matched Quad (4) Electro-Harmonix KT88 Vacuum Tubes
Electro-Harmonix
Now: $253.40Was: $281.55New 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...NP067-4Now: $253.40Was: $281.55 -
New Matched Pair (2) Electro-Harmonix KT88 Vacuum Tubes
Electro-Harmonix
Now: $126.95Was: $141.06New 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...NP067-2Now: $126.95Was: $141.06 -
New Electro-Harmonix KT88 Vacuum Tube
Electro-Harmonix
Now: $60.48Was: $67.20New 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...NP067-1Now: $60.48Was: $67.20 -
New Matched Octet (8) Electro-Harmonix 6550 Ceramic Vacuum Tubes
Electro-Harmonix
Now: $491.74Was: $546.38New Plate Current Matched Octet 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...NP057-8Now: $491.74Was: $546.38 -
New Matched Sextet (6) Electro-Harmonix 6550 Ceramic Vacuum Tubes
Electro-Harmonix
Now: $371.54Was: $412.82New Plate Current Matched Sextet 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...NP057-6Now: $371.54Was: $412.82