Black socket.
The new 6550 from JJ is just superb. We listened to them in our in-house hi-fi and were pleased to find they had solid low-end without any muddiness. If you need to re-tube your SVT, these are 6550 are perfect.
The JJ 6550 tube can be used in any 6550 tube amp. The large plates allow for more efficient cooling and headroom. Whether your application is a hifi amp, guitar, or bass amp, the JJ 6550 tube will be up to the job.
Our benchmark was to A/B the JJ 6550 against some of our NOS GE, RCA, Sylvania and Coke bottle Amperex 6550's. Most of the time JJ Electronic tubes will hold their own with NOS equivalents or even surpass them but in the case of the JJ 6550 these are hands down the best 6550 we have ever heard. They are very warm with a great clean tone and the breakup raw, crunchy and gritty. If you want an Angus - AC/DC type tone then these tubes really deliver! they are simply a lot of fun to play.
The JJ 6550 will not make as much power as the JJ KT88 and the KT88 is thicker sounding, in fact some players feel it's too thick, so if you want a fatter sounding tube than a 6L6 that breaks up earlier than a KT88 then the JJ 6550 may be just right.
We now stock the new super-high quality JJ audio tubes. These tubes have consistently outperformed the competition in tone and sonic performance. Quality is the best we have seen from this factory.
Also available on demand 8, 12 and 16 selected tubes. Contact us.
JJ Overview
JJ Electronic was formed in 1993 out of the privatization of Tesla company. It is located in the heart of Europe, in the Slovak Republic. With over 25 years of experience in development and manufacturing of electron tubes, our staff is ready to meet the demands of today`s HI-FI and music instruments markets. JJ ELECTRONIC manufactures tubes on proven Tesla equipment modernized with the latest technology.
JJ Testing
Every tube is electrically tested for parameters such as isolation characteristics, the electrode's current levels covering the entire operating curve, the condition of the vacuum, cathode emission capability, filament voltage and current levels. A microphonic test is performed on every tube. All tubes are then further burned-in for a period of 24 hours at the nominal specified operating voltage and current levels. Every month, a random sample is taken from the production to perform a life test of 5 000 hours at nominal operating conditions or 1000 hours at maximum specified levels.
Information on tube matching
La valvola col cuore.
Le ho snobbate per anni non conoscendole, ritenendo che le valvole moderne non possano mai avvicinarsi alle progenitrici NOS. Poi, costretto dagli eventi, ho convissuto con un ottetto di JJ Tesla in un finale CJ mv 125. Appena acquistata una coppia di CJ Premier 8, non ho esitato a ordinare due ottetti bilanciati di queste valvole dal cuore caldo. Arrivate in 18 ore (complimenti a Playstereo) hanno suonato magicamente sin da subito. Oggi, a distanza di 10 gg e con un rodaggio di 30 ore, sono quanto di più armonicamente ricco e sontuoso potessi sperare di ascoltare. Gamma media commovente con una particolare cura dei timbri dei legni. Voci maschili autorevoli e femminili sensuali e graffianti. Grande valvola dsl piccolo prezzo.
