Home > Vacuum tubes by type > Power tubes > 6550 Types These tube descriptions now include the results of the listening test we performed with Roman Klun, a recording engineer and producer who has worked with artists such as Sarah McLachlan and the Boomers. He listened to all our KT88 and 6550 types with his own reference recording and gave us his observations. The amplifier we use for listening tests is from Quicksilver Audio and is perfect for comparing many different types of tubes. The speakers we are using are Vandersteen 2Ce's.

Tung-Sol 6550The new Tung-Sol 6550 has been closely constructed to the original specifications of the triple getter, 3-hole plate version. Tonally, this 6550 tube has a smooth, extended high end, slightly warm midrange with great imaging, and a tight bottom end. Availability: Usually ships within 24 hours. TS-6550$67.95Price is for a Matched Pair.

Electro-Harmonix 6550This is the latest 6550EH tube for home audio amps from Electro-Harmonix. The Electro Harmonix 6550-EH tubes have excellent linearity, power handling capacity and heat dissipation. Availability: Usually ships within 24 hours. EH-6550$57.95Price is for a matched pair.

JAN-GE 6550AThe Legendary 6550A tube in original boxes made by General Electric in Owensboro, Kentucky. Triple getter in straight glass with metal bases. A balanced tube known for their incredible bottom end and rich mids. Availability: Usually ships within 24 hours. GE-6550$329.95Price is for a matched pair.

Sovtek 6550WEFrom our 6550 tube type listening test: "Emphasis on the Sovtek 6550WE can be heard in the lower bass and highest highs. At times the response is a little sluggish because of its compression factor with a fast attack and slow release. When this 6550-WE tube is pushed, it hotspots in the upper midrange, which will really bring out the crunchy guitars in rock music." Availability: Usually ships within 24 hours. SO-6550WE$53.95Price is for a matched pair.

Winged "C" (SED) 6550CThe Winged "C" (SED) 6550C is an ideal replacement for amplifiers with the GE 6550A tube. From our 6550 tube type listening test: "The Winged "C" 6550C has very controlled sound - nothing offensive can be found in any part of the frequency response. Also very consistent in detail and separation, with clean highs and exceptional balance throughout." This 6550 tube is a popular choice in Audio Research amps; check out this article by one our customers on how to rebias your Audio Research amp yourself (and save a bundle of money on tubes). Availability: Out of stock. More arriving in June. SV-6550C$69.95Price is for a matched pair.

Svetlana 6550CThe Svetlana 6550C tube is a new production tube manufactured at the New Sensor Corp. owned Xpo-Pul factory (also known as Reflektor) in Saratov, Russia. Use it to replace all other 6550 tubes and KT88 tubes. Availability: Usually ships within 24 hours. NE-6550$53.95Price is for a matched pair.

6550 Tube LinksFor more information on 6550 tubes including pinout, ratings, application and possible substitutions visit 6550 in Duncan Amps, and 6550 in The Tube Directory.

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