Home > Vacuum tubes by type > Power tubes > 6L6 / 5881 / KT66 Types How do these tubes sound? Read reviews to learn more. Facts you should know before purchasing: 25 Watt tubes such as 6L6, 6L6GB, and 5881 are rated for plate voltage up to 400 volts. 30 Watt tubes such as 6L6GC, 6L6WXT+, and 6L6WGC are rated for plate voltage up to 500 volts. The KT66 tube type is a 25 Watt tube rated for plate voltage up to 500 volts. Check your amplifier's owner's manual to find out what your amp requires or ask us.

Electro-Harmonix 6L6GCThis 6L6 tube from Electro-Harmonix is also called the 6L6-EH. Modeled after the vintage RCA 6L6GC "black plate," the 6L6EH tube features large plate dimensions and improved grid structure for increased power handling capabilities. Also features mica spacers with metal springs to eliminate tube rattle and microphonics. Availability: Usually ships within 24 hours. EL-6L6GC$32.95Price is for a matched pair.

JAN-Philips 6L6WGBOnce thought almost extinct, now back in stock! We found a few more of the classic JAN-Philips 6L6WGB tubes. Check out our 6L6 reviews. Availability: Usually ships within 24 hours. PH-6L6WGB$69.95Price is for a matched pair.

Winged "C" (SED) 6L6GCFrom our review of this tube: "This may be the closest thing available if you really want the vintage sound of the large bottle Sylvania and RCA tubes of yesterday. Tremendous harmonic content..." more Availability: Usually ships within 24 hours. SV-6L6GC$59.95Price is for a matched pair.

Sovtek 5881WXTFrom our review of the Sovtek 5881-WXT tube: "Solid construction and good performance..." more Availability: Usually ships within 24 hours. SO-5881WXT$27.95Price is for a matched pair.

Sovtek 6L6WXT+From our review of the Sovtek 6L6WXT+ tube: "Guitar-cable-amplifier. If this describes the rig you use, then this is one of two modern tubes you should consider..." more Availability: Usually ships within 24 hours. SO-6L6WXTP$29.95Price is for a matched pair.

Svetlana 6L6GCThis new production Svetlana 6L6GC tube is manufactured at the New Sensor Corp. owned Xpo-Pul factory (also known as Reflektor) in Saratov, Russia. Use it to replace all other 6L6 and 5881 tube types. Availability: Usually ships within 24 hours. NE-6L6GC$33.95Price is for a matched pair.

TAD 6L6GC-STRThis 6L6 tube is the perfect choice for the tone of rock legends. The new 6L6GC-STR has a tight low end and has all the guts and bite to perfectly accomplish all the rocking sounds from SRV to modern NU-Metal. They have powerful deep bass and a clear, airy top end. Availability: Usually ships within 24 hours. TAD-6L6GC$41.95Price is for a matched pair.

TAD 6L6WGC-STRWarm lower mids and silky top end; exactly like the classic GE 6L6 tube version of the 50's and 60's. The complex midrange and sweet highs are outstanding. These are the perfect choice for vintage amps like the Bassman, Twin or Super Reverb, just to name a few, and are great in many new tube amps as well. Availability: Usually ships within 24 hours. TAD-6L6WGC$43.95Price is for a matched pair.

JJ 6L6GCThis JJ 6L6GC is a high quality option for both guitar and home audio tube amplifiers...more Availability: Usually ships within 24 hours. TE-6L6GC$35.95Price is for a matched pair.

Tung-Sol 6L6GC-STRThe Tung-sol 6L6GC-STR tube is a true 6L6GC tube that is rated for plate voltage up to 500V and up to 30 watts of power. The Tungsol 6L6GC-STR is a good choice for any new or vintage guitar amp. Be sure to check out our review of the Tungsol 6L6GC-STR tube. Availability: Usually ships within 24 hours. TS-6L6GC$35.95Price is for a Matched Pair.

Tung-Sol 5881The Tung-Sol 5881 tube may be the best option available for guitar toting tone freaks. The magic is definitely not in the name. The new Tungsol 5881 tube has it all going on. Check out our review. Availability: Usually ships within 24 hours. TS-5881$39.95Price is for a Matched Pair.

Philips ECG 7581AThe Philips-ECG 7581A tube is a durable and great sounding replacement for the 6L6GC tube. The 7581 tube is very rare.Availability: Out of stock. TREAS-2$199.95Price is for a matched pair.

Gold Lion KT66The Gold Lion KT66 tube is a reissue tube that is made in Russia. From the manufacturer, "Exact copy of the original clear glass KT66. The tube that created “The Bluesbreaker Tone”. Used in 50’s-60’s hi-fi favorites such as the Heathkit W-5M and many Leak amplifiers." Availability: Usually ships within 24 hours. GL-KT66$79.95Price is for a matched pair.

JJ KT66The new JJ KT66 tube from JJ Electronic. This KT66 tube is rated to handle 550V of plate voltage and screen voltage. Availability: Usually ships within 24 hours. TE-KT66$69.95Price is for a matched pair.

Saratov KT66The Saratov KT66 is a high quality Russian made tube. This tube is well balanced from top to bottom, and has a smooth overdrive that makes it a great choice for a classic tone. It is acceptable to use in many 6L6 tube amps, but not all. Availability: Out of stock. RU-KT66$59.95Price is for a matched pair.

Shuguang KT66This new Chinese KT66 tube is very similar to the one used in the Marshall reissue JTM 45. These tubes need to be biased hot to sound their best. You can learn more about them in our 6L6 tube review. Availability: Usually ships within 24 hours. SH-KT66$49.95Price is for a matched pair.

Sovtek KT66From our review of this tube: "Everything you read in the review of the Sovtek 6L6WXT+ tube holds true for this tube..." more Availability: Usually ships within 24 hours. SO-KT66$55.95Price is for a matched pair.

Tung-Sol KT66From our review of the Tungsol KT66 tube: "Big and open with very solid lows and smooth treble response. The mids are well balanced and don’t go to the extremes of sounding scooped or nasal." Availability: Usually ships within 24 hours. TS-KT66$67.95Price is for a Matched Pair.

6L6 Tube LinksFor more information on 6L6 tubes including pinout, ratings, application and possible substitutions visit 6L6 in Wikipedia, 6L6 in Duncan Amps, and 6L6 in The Tube Directory.

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