![]() The tube delivers all the mid punch you would expect in an E元4 but also has a top end that is more open and bright. The sound however is not typical of an E元4 or 6CA7. The Gold Lion KT77 tube is a drop in replacement for an E元4 or 6CA7. You really have to think of this tube as its own entity. Since many of us have never actually listened to a KT77 tube from the original producer, I can not say that they nailed the reproduction. Gold Lion KT77 - This tube was a treat to listen to. If you want something loud and proud, you want to put the EH 6CA7 in your amp. If you want early Van Halen, these are not the tubes for you. If using these tubes in more reasonable systems the EH 6CA7 is capable of some really nice clean tones thanks to that extra headroom. The EH is well constructed and should not pose any noise problems. Biasing levels can be dialed in from warm to hot without causing significant tonal changes. Just the right amount of compression for great thick rock tone. ![]() The 6CA7 tube has more headroom than an E元4 and by the time you get it really crunchy sounding your pants are flapping in the breeze. It’s the sound of Pete Townsend and The Who. As mentioned, there is nothing like a Hiwatt head powered by 6CA7 tubes and driving a 4x12 cab loaded with Fane speakers. They handle high voltage and current without problems. These tubes sound every bit as good as the old EI tubes and are probably my favorite tubes for Hiwatt guitar amplifiers. With a volume and single tone control this amp really lets you hear the tonal differences between the tubes.Ĭlick to view our E元4 Tube Comparison ChartĮlectro Harmonix 6CA7-EH - At last something to replace the hole left since the EI 6CA7 went out of stock. This is a true single ended class A amplifier, using a 5Y3 rectifier and a single 5691 pre-amp tube. The sound was reproduced through a 1971 Marshal cabinet with 4 Celestion G12M "greenback" speakers.Ĭlass A Combo: Designed and built by Bernard Raunig. These factors are important to musicians but may not be an issue when a tube is used in the home or studio.ġ973 Marshall Super Lead model 1959: This amp is completely stock using NOS pre-amp tubes. With this in mind, consideration has been given to construction quality and mechanical noise. This testing was done using tube guitar amplifiers. The E元4 is a very popular tube and is used in equipment that creates as well as reproduces music. I have attempted to add some objectivity by defining some aspects of tube performance that affect any listener, regardless of application, budget or musical taste. We each have our own personal taste in music and the way it sounds. It’s not easy evaluating something as subjective as sound. Clearance - Bargains - Scratch and Dent.Each REDBASE tube is made exclusively to their specs, then tested in Germany with an additional burn-in treatment and matching process to ensure flawless performance. With REDBASE, Tube Amp Doctor has refined everything about its tube selection process. And these are built to last-extra rugged glass, gold control grid wire, and two extra large cooling grids protect your amp. Like your favorite E元4s, the bass sound is full but never muddy, the midrange is vocal and warm, and the highs sing with rich harmonics. Tube Amp Doctor E元4-STR REDBASE™ Power Tubeĭesigned from the ground up, the TAD E元4-STR REDBASE has redefined what an E元4 can do! Based on the revered Telefunken E元4, this tube has the ideal balance of a rich clean tone and tons of grit and distortion when you drive it hard. ![]() This tube is part of a matched set with the other tube located in my separate listing. My taste is a bit different and I've opted to install JJ's. This tube performed flawlessly while installed. This E元4 was pulled out of my Blackstar HT Studio 20H.
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