6c45 driver power tubes or preamp

Woo audio wa33 elite edition headphone and preamplifier. Sep 15, 2016 an alltube carvin v3, equipped with five 12ax7 preamp and four el34 power tubes. The input noise resistance is 100 ohms, very low inputoutput capacitance and the dissipation are nearly 8 watts which sovtek claims makes it an ideal candidate for preamp, driver and signal processing applications. Get the best deals on vintage electrical transformers when you shop the largest. It is a pure tube design, utilizing 6c45 tubes in a classa, singleended topology, with transformer coupled outputs. Balanced audio technology rex line preamplifier page 2. Vacuum tubes by use preamp driver tubes 6n7s 6n7gt foton tube. Everything you ever wanted to know about preamp tubes. Dual 3pin xlr left and right channel, 4pin xlr x 1 and 14 6. Basically, the 6c45 is a high mu single triode with a low plate resistance and a very high transconductance.

Woo audio wa33 fullybalanced headphone amppreamp a headamp. The woo audio wa7 gen 2 fireflies ampdac is a combination of high performance vacuum tube headphone amplifier with a builtin usb digitaltoanalog converter. Woo audio wa33 standard headphone amp and preamp with. The wa33 employs a true fully balanced directheated triode, class a, outputtransformer design in a compact form factor, featuring a quad of 6c45 tubes for the driver that pushes a quad of 2a3 tubes for the power in an alltube design. It gives you more options, and especially if you run into the same types of issues that i did. As the signal passes through, preamp tubes influence the various eq stages found in your amp, such as distortion, gain boost, tremolo and reverb. If you arent sure about which valve you need, or what tubes you can substitute, let us help you. Nov 11, 2017 for tube sound, which is more important.

We consulted the sweetwater service departments tube amp expert, greg bowers, for the lowdown on this question. Woo audio wa33 standard headphone amp and preamp upgraded tubes, excellent condition, low hours fully balanced design tubes. I heard that some of the new mini tube amps, like the vox lil night train, use preamp tubes for their power amp. An all octal 5e3 would be pretty darn cool, although getting decent octal preamp tubes can be a challenge. Wa33 employs a true fullybalanced design featuring 6c45 driver tubes, four 2a3 power tubes, and 274b rectifier tube, all in directheated triodes to reveal the most delicate detail with the highest level of refinement. Woo audio wa33 fully balanced headphone and preamplifier. Through the years since about 1975, i have owned many tube and solid state amps and preamps, in various combinations. Ive noticed that some amps use 12at7 or 12au7 driver tubes mine has a 12ax7. You can also learn more about vacuum tubes and tube amplifiers. You may want to consider wiring the octal pre sockets in parallel with 9pin sockets. This headphone amp preamp uses four 6c45 tubes as the drivers for four rather large 2a3 power tubes used as directheated triodes. Based on my experience, the internally mounted ac shunt voltage regulation switch in the power module that lets you choose between pairs of 6h30 and 6c45 tubes produced huge audible differences. It has a 20 percent higher output than the sovtek 5881wxt. The woo audio wa7 fireflies ampdac is a combination of high performance vacuum tube headphone amplifier with a builtin usb digitaltoanalog converter.

Platinum matched tubes this new sovtek is modeled after the vintage rca 6l6gc blackplate. May 2019 is audio experience reference grade line preamp. This version of wa7 gen 2 includes the woo audio wa7tp power supply, using classic vacuum tube circuitry for a nice performance upgrade. Preamp tubes take the small signal from your pickup and amplify it to line level. Tube compliment is 6c45 driver power x 2 for the ampdac unit and for the wa7 tube power supply upgrade 12au75963 rectifier x 2. Each set of power tubes will draw a different current measured in milliamps, affecting how fast the signal gets passed through your amp. Aug 14, 2019 the standard model comes with a solidstate linear power supply but one could upgrade that to a tube power supply unit that looks like the ampdac unit see the unit on the left in the photo above. I have always loved the tube sound warmth, midrange, soundstage.

I get preamp tubes in a preamp, but ive found it difficult to find a clear explanation of what the driver and input tubes are actually doing, and their relative importance to the sound of the amp. New listing ten vintage transformers power and output for. Further, a parallel cathode follower of 45s has only 10ohm of output impedance. Raphaelite 5k output transformer for preamp parallel 6c45. But to help them really love us backand i mean with big, juicy, bearhug lovewe need to know a little bit about what makes them tick, how they vary, and what they do for our precious guitar tone. The multi awardwinning wa7 fireflies is improved and better than ever. He said some things about using octal tubes that reminded me why i like them the siren song is described as a hedonistic preamp. Instead, thinking about octal tubes reminded me that bob danielak had sent me a dc coupled 6sl7 phono preamp design he had worked out, and i had been meaning to build it for a. The 6c45 p e is a low power triode 8 watts max for the p d paramenter. They are usually pentodes like el84s and el34s or what is called a beam tetrode or pentode like 6l6 and kt88. Each wound string is precision wrapped with round nickelplated steel onto a high carbon, hexagonshaped steel core. More impressive, though, were the rexs musical performances.

Ive tried to list links where there is 1 a picture, and 2 a schematic. Power amp tubes in most guitar amplifiers today are typically not of the triode type of tube like the preamp tubes. Woo audio wa7 fireflies silver excellent condition. When you start looking for every last watt out of a power tube it helps if the tube before it can supply a bit of power you kind of smack them around a bit despite peoples love for fairly large power tubes in headphone amps, headphone amps almost never get to this level. Oct 15, 20 it is a pure tube design, utilizing 6c45 tubes in a classa, singleended topology, with transformer coupled outputs. These are generally much smaller than power amp tubes and serve the main function of shaping the overall character and tonal characteristics of your guitar sound. There are no semiconductors used in the entire signal path. Short lifetime for 6ns7 tubes audiogon discussion forum. Wa7 fireflies 2nd gen headphone amplifier dac woo audio. But, lets throw the term audiophile out the window.

Woo audio wa7 fireflies tube amplifier the headphone annex. I havent been able to tell yet if a nos tube is going bad in a particular socket. No really good substitute anyway for something like this, no gain to speak of to change, definitely not something to play with. In fact, because the parafeed inductor shields us from the power supply ripple, we are allowed to keep everything groundreferenced within the amplifier. Driverinput tubes i need somebody to either explain or steer me to an explanation of the 12ax712at7 tubes purpose in my jolida jd502p power amp. There are no semiconductors used in the entire amplification path. The 6c45 triode acts as both driver and power tube. This tube features larger plate dimensions and improved grid structure for increased power handling capabilities. The circuit features high power, good definition and very low noise. The wa33 employs a true fully balanced design in a compact form factor, featuring a quad four of 6c45 tubes for the driver that pushes a quad four of 2a3 tubes for the power, and all in directheated triodes. Power tubes, or output tubes, continue to amplify the signal sent from the preamp section so they can drive the speakers. As detailed in our exhaustive piece about testing headsets and headphones, audio is serious business. In most amp circuits, it is common for each stage to be controlled by one preamp tube. While there are many different types of preamp tubes, the most common type is the classic 12ax7.

This amplifier produces astounding results in terms of transparency and musicality. Jan 22, 2008 hi, i would like to hear if anybody has experience with using a class d power amp with a tube preamp. They were fantastically articulate, transparent, and quiet. Im attracted to the low power consumption and small size of class d as well as the reportedly authoritative sound. I spent a very long time myself trying to understand it enough to be able to perform basic maintenance and tweak the tone of my amplifier. The beam type was designed to get around the patented pentode power tube. Woo audio wa7 fireflies usb dac and headphone amp w. Ive got a hybrid head, and i recently swapped out the preamp tubes with excellent results but i was wondering if there was any benefit to switching the driver tube. Our new ehx strings electroharmonix electric guitar strings are customdesigned to our specifications and made in the usa by a premiere string manufacturer.

Wa33 fullybalanced headphone amppreamplifier woo audio. For sale is a demo unit of a woo audio wa7 fireflies in silver, with their stock tubes and solid state power supply and unmistakable industrial design and glass tube cage. Some of the pages are in other languages, particularly german. Jan, 2007 my other system has the aesthetix callisto pre lots of tubes with the nagra psa solid state amp, also nice combo. What would the effect be of putting in a lower gain tube in this slot. My first purchase from woo audio was the gorgeous wa7 fireflies. Have a question, call us at 2122535729 the woo audio wa7 fireflies ampdac is a combination of high performance vacuum tube headphone amplifier with a builtin usb digitaltoanalog converter. But they dont stay in the preamp for an extended period of time. Jan 19, 2011 driver tubes are a really foggy category. Over the course of a few shows, i had a chance to listen to their wa5le which left an imprint on my mind. Down on the more realistic end of things, i use the monarchy d24 preamp dac tubes with the first watt f3 amp solid state going back to your concept of solid state pre and tube power, i have been using the bat vk42se. Woo audio claims that this amplifier delivers enough power to drive demanding headphones to their full potential which maintaining a low noise floor for use with sensitive models. Further, the equivalent noise resistance is 50ohm, making it well suited for a broad range of applications.