6L6 - 5881 -KT66 - 7027
Shop our large selection of 6L6 & equivalent vacuum tubes. This is one of the most popular power tubes on the planet and as such, there are almost unlimited options.
There is much confusion surrounding the equivalent and substitute tubes in regards to 6L6. Much of it has to do with the fact that the tube has been around for so long, it has been revised and new versions have been made. Please be sure that you are ordering the correct tube. A 6L6G will not work in place of it's high-power successor, the 6L6GC.
When in doubt, you can always use a 6l6GC if an amplifier calls for any of the 6L6 types because the GC can handle the highest voltage.
Metal 6L6, 6L6G & 6L6GA - Maximum dissipation of 19 watts and are interchangeable
6L6GB, 6L6WGB, 5881 - Maximum dissipation of 23/26 watts and are interchangeable
6L6GC - The standard among 6L6's. Maximum dissipation of 30 watts, generally interchangeable with KT66
KT66 - Maximum plate dissipation of 33 watts and is generally interchangeable with 6L6GC
7027A - a 6L6GC with a different pinout and is not interchangeable with anything
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On Sale
New Matched Pair (2) Tung-Sol 6L6G Fat Bottle Vacuum Tubes
Tung-Sol
Now: $153.97Was: $171.08New Plate Current Matched Pair of Tung-Sol Reissue 6L6G Fat Bottle Vacuum Tubes The Tung-Sol 6L6G features the same internal construction as the 6L6G straight bottle, but is put into the traditional larger shouldered glass. Will work in place...NP141-2Now: $153.97Was: $171.08 -
On Sale
New Tung-Sol 6L6G Fat Bottle Vacuum Tube
Tung-Sol
Now: $73.16Was: $81.29New Plate Current Tested Tung-Sol Reissue 6L6G Fat Bottle Vacuum Tube The Tung-Sol 6L6G features the same internal construction as the 6L6G straight bottle, but is put into the traditional larger shouldered glass. Will work in place...NP141-1Now: $73.16Was: $81.29 -
On Sale
New Matched Octet (8) Mullard 6L6GC Reissue Vacuum Tubes
Mullard
Now: $390.60Was: $434.00New Plate Current Matched Octet of Mullard 6L6GC Reissue Vacuum Tubes This valve is a rugged and reliable replacement for any 6L6 or 5881 type. Perfect replacement for the output valves used in the reissue Marshall JTM-45 head and Bluesbreaker Combo...NP091-8Now: $390.60Was: $434.00 -
On Sale
New Matched Quad (4) Mullard 6L6GC Reissue Vacuum Tubes
Mullard
Now: $195.56Was: $217.29New Plate Current Matched Quad of Mullard 6L6GC Reissue Vacuum Tubes This valve is a rugged and reliable replacement for any 6L6 or 5881 type. Perfect replacement for the output valves used in the reissue Marshall JTM-45 head and Bluesbreaker Combo...NP091-4Now: $195.56Was: $217.29 -
On Sale
New Matched Pair (2) Mullard 6L6GC Reissue Vacuum Tubes
Mullard
Now: $99.07Was: $110.08New Plate Current Matched Pair of Mullard 6L6GC Reissue Vacuum Tubes This valve is a rugged and reliable replacement for any 6L6 or 5881 type. Perfect replacement for the output valves used in the reissue Marshall JTM-45 head and Bluesbreaker Combo...NP091-2Now: $99.07Was: $110.08 -
On Sale
New Mullard 6L6GC Reissue Vacuum Tube
Mullard
Now: $47.37Was: $52.63New Plate Current Tested Mullard 6L6GC Vacuum Tube This valve is a rugged and reliable replacement for any 6L6 or 5881 type. Perfect replacement for the output valves used in the reissue Marshall JTM-45 head and Bluesbreaker Combo amplifiers. Will work...NP091-1Now: $47.37Was: $52.63 -
On Sale
New Matched Octet (8) Tung-Sol 7581A Vacuum Tubes
Tung-Sol
Now: $340.73Was: $378.59New Plate Current Matched Octet of Tung-Sol 7581A (KT66) Vacuum Tubes The Tung-Sol 7581A is rated at a higher 35 watts compared to the standard 7581 or 6L6GC. This tube is a direct substitute for the KT66, and is in fact a version of the KT66. These...NP085-8Now: $340.73Was: $378.59 -
On Sale
New Matched Sextet (6) Tung-Sol 7581A Vacuum Tubes
Tung-Sol
Now: $253.81Was: $282.01New Plate Current Matched Sextet of Tung-Sol 7581A (KT66) Vacuum Tubes The Tung-Sol 7581A is rated at a higher 35 watts compared to the standard 7581 or 6L6GC. This tube is a direct substitute for the KT66, and is in fact a version of the KT66. These...NP085-6Now: $253.81Was: $282.01 -
On Sale
New Matched Quad (4) Tung-Sol 7581A Vacuum Tubes
Tung-Sol
Now: $169.78Was: $188.64New Plate Current Matched Quad of Tung-Sol 7581A (KT66) Vacuum Tubes The Tung-Sol 7581A is rated at a higher 35 watts compared to the standard 7581 or 6L6GC. This tube is a direct substitute for the KT66, and is in fact a version of the KT66. These...NP085-4Now: $169.78Was: $188.64 -
On Sale
New Matched Pair (2) Tung-Sol 7581A Vacuum Tubes
Tung-Sol
Now: $86.60Was: $96.22New Plate Current Matched Pair of Tung-Sol 7581A (KT66) Vacuum Tubes The Tung-Sol 7581A is rated at a higher 35 watts compared to the standard 7581 or 6L6GC. This tube is a direct substitute for the KT66, and is in fact a version of the KT66. These...NP085-2Now: $86.60Was: $96.22 -
On Sale
New Tung-Sol 7581A Vacuum Tube
Tung-Sol
Now: $41.52Was: $46.13New Plate Current Tested Tung-Sol 7581A (KT66) Vacuum Tube The Tung-Sol 7581A is rated at a higher 35 watts compared to the standard 7581 or 6L6GC. This tube is a direct substitute for the KT66, and is in fact a version of the KT66. These Tung-Sols...NP085-1Now: $41.52Was: $46.13 -
On Sale
New Matched Octet (8) Electro-Harmonix 6L6GC Vacuum Tubes
Electro-Harmonix
Now: $236.71Was: $263.01New Plate Current Matched Octet of Electro-Harmonix 6L6GC Vacuum Tubes Modeled after the vintage RCA 6L6GC black plate, the 6L6EH features large plate dimensions and improved grid structure for increased power handling capabilities. Also features mica...NP069-8Now: $236.71Was: $263.01 -
On Sale
New Matched Sextet (6) Electro-Harmonix 6L6GC Vacuum Tubes
Electro-Harmonix
Now: $179.17Was: $199.08New Plate Current Matched Sextet of Electro-Harmonix 6L6GC Vacuum Tubes Modeled after the vintage RCA 6L6GC black plate, the 6L6EH features large plate dimensions and improved grid structure for increased power handling capabilities. Also features mica...NP069-6Now: $179.17Was: $199.08 -
On Sale
New Matched Quad (4) Electro-Harmonix 6L6GC Vacuum Tubes
Electro-Harmonix
Now: $118.61Was: $131.79New Plate Current Matched Quad of Electro-Harmonix 6L6GC Vacuum Tubes Modeled after the vintage RCA 6L6GC black plate, the 6L6EH features large plate dimensions and improved grid structure for increased power handling capabilities. Also features mica...NP069-4Now: $118.61Was: $131.79 -
On Sale
New Matched Pair (2) Electro-Harmonix 6L6GC Vacuum Tubes
Electro-Harmonix
Now: $60.40Was: $67.11New Plate Current Matched Pair of Electro-Harmonix 6L6GC Vacuum Tubes Modeled after the vintage RCA 6L6GC black plate, the 6L6EH features large plate dimensions and improved grid structure for increased power handling capabilities. Also features mica...NP069-2Now: $60.40Was: $67.11 -
On Sale
New Electro-Harmonix 6L6GC Vacuum Tube
Electro-Harmonix
Now: $29.14Was: $32.38New Plate Current Tested Electro-Harmonix 6L6GC Vacuum Tube Modeled after the vintage RCA 6L6GC black plate, the 6L6EH features large plate dimensions and improved grid structure for increased power handling capabilities. Also features mica spacers with...NP069-1Now: $29.14Was: $32.38 -
On Sale
New Matched Octet (8) Tung-Sol 5881 Reissue Vacuum Tubes
Tung-Sol
Now: $251.08Was: $278.98New Gain Matched Octet of Tung-Sol 5881 (6L6WGB) Reissue Vacuum Tubes This is another new production tube done right by Tung-Sol. That classic 5881 sound was pioneered by Tung-Sol as one of the only brands that actually produced this specific tube model...NP046-8Now: $251.08Was: $278.98 -
On Sale
New Matched Sextet (6) Tung-Sol 5881 Reissue Vacuum Tubes
Tung-Sol
Now: $189.95Was: $211.06New Gain Matched Sextet of Tung-Sol 5881 (6L6WGB) Reissue Vacuum Tubes This is another new production tube done right by Tung-Sol. That classic 5881 sound was pioneered by Tung-Sol as one of the only brands that actually produced this specific tube model...NP046-6Now: $189.95Was: $211.06 -
On Sale
New Matched Quad (4) Tung-Sol 5881 Reissue Vacuum Tubes
Tung-Sol
Now: $125.80Was: $139.78New Plate Current Matched Quad of Tung-Sol 5881 (6L6GWB) Reissue Vacuum Tubes This is another new production tube done right by Tung-Sol. That classic 5881 sound was pioneered by Tung-Sol as one of the few brands that actually produced this specific tube...NP046-4Now: $125.80Was: $139.78 -
On Sale
New Matched Pair (2) Tung-Sol 5881 Reissue Vacuum Tubes
Tung-Sol
Now: $63.59Was: $70.65New Plate Current Matched Pair of Tung-Sol 5881 (6L6WGB) Reissue Vacuum Tubes This is another new production tube done right by Tung-Sol. That classic 5881 sound was pioneered by Tung-Sol as one of the only brands that actually produced this specific...NP046-2Now: $63.59Was: $70.65 -
On Sale
New Tung-Sol 5881 Reissue Vacuum Tube
Tung-Sol
Now: $30.83Was: $34.26New Gain Tested Tung-Sol 5881 (6L6WGB) Reissue Vacuum Tube This is another new production tube done right by Tung-Sol. That classic 5881 sound was pioneered by Tung-Sol as one of the only brands that actually produced this specific tube model. The...NP046-1Now: $30.83Was: $34.26 -
On Sale
New Matched Octet (8) Genalex Gold Lion KT66 Reissue Vacuum Tubes
Genalex
Now: $424.76Was: $471.95New Current Matched Octet (8) of Reissue Genalex Gold Lion KT66 / 6L6 Vacuum Tubes These are so close to the originals we could hardly tell the difference in both appearance and sound. Of course these are made in Russia and not England like the...NP018-8Now: $424.76Was: $471.95 -
On Sale
New Matched Sextet (6) Genalex Gold Lion KT66 Reissue Vacuum Tubes
Genalex
Now: $320.81Was: $356.45New Current Matched Sextet (6) of Reissue Genalex Gold Lion KT66 / 6L6 Vacuum Tubes These are so close to the originals we could hardly tell the difference in both appearance and sound. Of course these are made in Russia and not England like the...NP018-6Now: $320.81Was: $356.45 -
On Sale
New Matched Octet (8) Sovtek 5881WXT Vacuum Tubes
Sovtek
Now: $305.49Was: $339.43New Plate Current Matched Octet (8) of Sovtek 5881WXT / 6L6WGC Vacuum Tubes The Sovtek 5881WXT is one of the most popular 5881 vacuum tubes. The 6L6WGC is the same exact tube as the 5881 so if your amplifier calls for either, it will work. This...NP009-8Now: $305.49Was: $339.43 -
On Sale
New Matched Sextet (6) Sovtek 5881WXT Vacuum Tubes
Sovtek
Now: $231.06Was: $256.73New Plate Current Matched Sextet (6) of Sovtek 5881WXT / 6L6WGC Vacuum Tubes The Sovtek 5881WXT is one of the most popular 5881 vacuum tubes. The 6L6WGC is the same exact tube as the 5881 so if your amplifier calls for either, it will work. This...NP009-6Now: $231.06Was: $256.73 -
On Sale
New JJ 6L6GC Vacuum Tube
JJ Electronic
Now: $24.38Was: $30.48New Gain Tested JJ Electronic (Tesla) 6L6GC Vacuum Tube The JJ 6L6GC is one of the most popular new production tubes of all time. There is a reason that many amplifier manufacturers use them. These are very reliable and have a sweet tone with...NP031-1Now: $24.38Was: $30.48 -
On Sale
New Matched Pair (2) JJ 6L6GC Vacuum Tubes
JJ Electronic
Now: $49.87Was: $62.34New Plate Current Matched Pair of JJ Electronic (Tesla) 6L6GC Vacuum Tubes The JJ 6L6GC is one of the most popular new production tubes of all time. There is a reason that many amplifier manufacturers use them. These are very reliable and have...NP031-2Now: $49.87Was: $62.34 -
On Sale
New Matched Quad (4) JJ 6L6GC Vacuum Tubes
JJ Electronic
Now: $98.34Was: $122.92New Plate Current Matched Quad of JJ Electronic (Tesla) 6L6GC Vacuum Tubes The JJ 6L6GC is one of the most popular new production tubes of all time. There is a reason that many amplifier manufacturers use them. These are very reliable and have...NP031-4Now: $98.34Was: $122.92 -
On Sale
New Matched Sextet (6) JJ 6L6GC Vacuum Tubes
JJ Electronic
Now: $148.94Was: $186.17New Plate Current Matched Sextet of JJ Electronic (Tesla) 6L6GC Vacuum Tubes The JJ 6L6GC is one of the most popular new production tubes of all time. There is a reason that many amplifier manufacturers use them. These are very reliable and...NP031-6Now: $148.94Was: $186.17 -
On Sale
New Matched Octet (8) JJ 6L6GC Vacuum Tubes
JJ Electronic
Now: $196.21Was: $245.26New Plate Current Matched Octet of JJ Electronic (Tesla) 6L6GC Vacuum Tubes The JJ 6L6GC is one of the most popular new production tubes of all time. There is a reason that many amplifier manufacturers use them. These are very reliable and have...NP031-8Now: $196.21Was: $245.26 -
On Sale
New Matched Octet (8) Tung-Sol 6L6GC STR Reissue Vacuum Tubes
Tung-Sol
Now: $302.09Was: $335.65New Plate Current Matched Octet of Tung-Sol 6L6GC STR Reissue Vacuum Tubes The Tung-Sol legacy continues with the introduction of the new 6L6GC STR. The ultimate in musical tone and smooth overdrive, the STR delivers the sound that established Tung-Sol...NP029-8Now: $302.09Was: $335.65 -
On Sale
New Matched Sextet (6) Tung-Sol 6L6GC STR Reissue Vacuum Tubes
Tung-Sol
Now: $226.38Was: $251.53New Plate Current Matched Sextet of Tung-Sol 6L6GC STR Reissue Vacuum Tubes The Tung-Sol legacy continues with the introduction of the new 6L6GC STR. The ultimate in musical tone and smooth overdrive, the STR delivers the sound that established Tung-Sol...NP029-6Now: $226.38Was: $251.53 -
On Sale
New Matched Quad (4) Tung-Sol 6L6GC STR Reissue Vacuum Tubes
Tung-Sol
Now: $149.84Was: $166.49New Plate Current Matched Quad of Tung-Sol 6L6GC STR Reissue Vacuum Tubes The Tung-Sol legacy continues with the introduction of the new 6L6GC STR. The ultimate in musical tone and smooth overdrive, the STR delivers the sound that established Tung-Sol as...NP029-4Now: $149.84Was: $166.49 -
On Sale
New Matched Pair (2) Tung-Sol 6L6GC STR Reissue Vacuum Tubes
Tung-Sol
Now: $76.21Was: $84.68New Plate Current Matched Pair of Tung-Sol 6L6GC STR Reissue Vacuum Tubes The Tung-Sol legacy continues with the introduction of the new 6L6GC STR. The ultimate in musical tone and smooth overdrive, the STR delivers the sound that established Tung-Sol as...NP029-2Now: $76.21Was: $84.68 -
On Sale
New Tung-Sol 6L6GC STR Reissue Vacuum Tube
Tung-Sol
Now: $37.05Was: $41.17New Plate Current Tested Tung-Sol 6L6GC STR Reissue Vacuum Tube The Tung-Sol legacy continues with the introduction of the new 6L6GC STR. The ultimate in musical tone and smooth overdrive, the STR delivers the sound that established Tung-Sol as the...NP029-1Now: $37.05Was: $41.17 -
On Sale
New Matched Quad (4) Genalex Gold Lion KT66 Reissue Vacuum Tubes
Genalex
Now: $214.48Was: $238.31New Current Matched Quad (4) of Reissue Genalex Gold Lion KT66 / 6L6 Vacuum Tubes These are so close to the originals we could hardly tell the difference in both appearance and sound. Of course these are made in Russia and not England like the...NP018-4Now: $214.48Was: $238.31 -
On Sale
New Matched Pair (2) Genalex Gold Lion KT66 Reissue Vacuum Tubes
Genalex
Now: $107.50Was: $119.44New Current Matched Pair of Reissue Genalex Gold Lion KT66 / 6L6 Vacuum Tubes These are so close to the originals we could hardly tell the difference in both appearance and sound. Of course these are made in Russia and not England like the originals...NP018-2Now: $107.50Was: $119.44 -
On Sale
New Genalex Gold Lion KT66 Reissue Vacuum Tube
Genalex
Now: $51.33Was: $57.03New Reissue Genalex Gold Lion KT66 / 6L6 Vacuum Tube These are so close to the originals we could hardly tell the difference in both appearance and sound. Of course these are made in Russia and not England like the originals but that seems to be...NP018-1Now: $51.33Was: $57.03 -
On Sale
New Sovtek 5881WXT Vacuum Tube
Sovtek
Now: $37.82Was: $42.02New Plate Current Tested Sovtek 5881WXT / 6L6WGC Vacuum Tube The Sovtek 5881WXT is one of the most popular 5881 vacuum tubes. The 6L6WGC is the same exact tube as the 5881 so if your amplifier calls for either, it will work. This tube was built to strict...NP009-1Now: $37.82Was: $42.02 -
On Sale
New Matched Pair (2) Sovtek 5881WXT Vacuum Tubes
Sovtek
Now: $77.85Was: $86.50New Plate Current Matched Pair of Sovtek 5881WXT / 6L6WGC Vacuum Tubes The Sovtek 5881WXT is one of the most popular 5881 vacuum tubes. The 6L6WGC is the same exact tube as the 5881 so if your amplifier calls for either, it will work. This tube was...NP009-2Now: $77.85Was: $86.50