The TELEFUNKEN 6550-TK isa high output power tube suitable for use in guitar amplifiers and Leslie speakersystems. Ideal for use in classic Marshall,Fender and Ampeg tube circuits, the 6550-TK offers outstanding performance andstability.

Tung-Sol developed the 6550 in 1955 for use as a servo amplifier and in industrial applications. The designis based on the 6L6, but with more gain and better stability.

Like the 6L6, the 6550 isa beam power tube design (or power tetrode) that can painlessly deliver 35watts at its output.

Any bass player with anAmpeg SVT knows the beauty of the 6550 sound, as well as the raw power they candeliver. One of the best features of the 6550 is the tube's long lifecharacteristic, which will grant the user fewer tube changes over the years.