Ruby Power tube EL34STR

The new EL34STR sets new standards in price and quality. It is the most robust EL34 in the Ruby program, with outstanding electrical values and maximum output performance. The sound is powerful and has great high end. The mechanical stability is exrordenary, so that the tubes may be installed in combo-amps without any difficulties. Maximum reliability is the product of high-quality internal construction, and extended burn-in and testing methods specific to the RUBY STR class of tubes.