It is a pure tube design, utilizing 6c45 tubes in a classa, singleended topology, with transformer coupled outputs. If you want to get it happening for you, though, youve got to understand whats going on with different tube types, and learn the various ways the wide range of tubes available will affect your sound. Personally, ive only heard the sovtek 6922 and el84, but i didnt really like the sound of either in comparison with other modern tubes of the same type nos tubes are something special. I just purchased a lm 518 ia, which is a 22 watt set integrated using 845 tubes. Driver s window switch controls not working in your mazda. This amazing tube will excel in small signal applications, as well as a driver, or anywhere really precise performance is required. I am building a 6c45pi based preamplifier with phono and line stages.
It also affects the overall gain of the power amp, and the frequency compensation provided by components within the feedback loop one or more caps or resistors to help keep the power amp stable. This headphone amppreamp uses four 6c45 tubes as the drivers for four rather large 2a3 power tubes used as directheated triodes. Woo audio has a reputation of producing very high quality tube amplifiers built in the united states. Whether this was for privacy concerns, such as listening to music late at night, or for use when traveling on a short commute or a long trip on an airplane, headphones are our. Im not sure if it is simply a fattening up of the sound of the 6c45 or some form of distortion cancellation with the output tube. Were going to explore how to get started with it, and how to get the best out of. If you arent sure about which valve you need, or what tubes you can substitute, let us help you. Free shipping is limited to the contiguous 48 states. Hes been building pcs and ruffling feathers in the industry for 20 years, and isnt afraid to.
In the heyday of the old boozhound labs blog, when i was building a ton of audio gear and was super into tubes, an amp using this basic topology transformer coupled pushpull 6c45s was the last and best tube amp i built. This vacuum tube headphone amplifier has a builtin usb 32bit192khz dac and 6c45 driver power tubes operating in class a. It delivers high power to drive demanding headphones to their full potential while maintaining a low noise floor for use with highly sensitive models. You can also learn more about vacuum tubes and tube amplifiers. From the 1st moment i saw the specs ive recognized this will. Woo audio wa7 fireflies silver excellent condition. It is a fully balanced, tubebased unit comprising two chassis that are. Pure tube design without the use of semiconductors in the amplification circuitry. Wooaudio wa33 balanced headphone amplifier black best. Small power single ended amplifier on 20 by 71a how about dont you think only 0. The next time you need to retube your guitar, bass, or hifi amp, be sure to insist on getting authentic electroharmonix tubes. Woo audio wa33 fully balanced headphone and pre amplifier. Oct 15, 20 now its target is mostly music and not gaming so that is what i am going to use it for since it didnt like to play well with razer surround. Beauty meets highperformance, wa7 is a vacuum tube headphone amplifier.
The two pieces stay together during transportation. Woo audio wa33 hi fi home theater san francisco high end. January 2015 woo audio wa7d fireflies vacuum tube headphone amplifier with dac i fell in love. Only do this if you need more output power and more drive strength from this tube, as power stage or driver stage. They have their tubes made by their own specifications, in several tube factories around the world, mainly incl. The unique voltage amplifier stage drives without problems the 211s grid pemitting also a soft a2class mode of operation. Each wound string is precision wrapped with round nickelplated steel onto a high carbon, hexagonshaped steel core. The woo audio wa7 gen 2 fireflies ampdac is a combination of high performance vacuum tube headphone amplifier with a builtin usb digitaltoanalog converter. Mar 25, 2016 the sovtek 6c45 triode assumes both driver and power tube responsibilities. These are great replacement power tubes for many guitar amps. The formidable wa33 tube headphone amplifier from woo audio, their new. It employs a pure tube design, utilizing 6c45 tubes in a classa, singleended topology, with transformer coupled outputs.
The 6c45 triode acts as both driver and power tube. This headphone amppreamp uses four 6c45 tubes as the drivers for four. That is, changes in the driver tube s current dont influence the power tube significantly. Like the companys wa22 model and unlike most other woo models the wa33 is fully balanced with four kr2a3 power tubes, four 6c45 driver tubes and one 5u4g rectifier tube taking care of the dirty work. Nos mullard el34 xf1, 2 unmatched nos singles available. Theres something so alluring about tube amplifiers.
Power tubes as drivers line magnetic audiogon discussion. I recently had a blackface fender bassman amp restored and was wondering about which 6l6 tube would give me the best tone. Wa33 fullybalanced headphone amppreamplifier woo audio. Compared to the pioneer pt9 this is a big step forward. Installation is pretty clear, just make sure the guide key is lined up correctly and do make sure your amp is turned off for a day or so before changing tubes as the capacitors can hold a high charge and fry you if you are not careful. 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. Nov 23, 2008 a bit off the usual topic of conversation, but there are a lot of tube experts floating around these parts. The usb input supports up to 32192k highres playback. Woo audio wa7d fireflies vacuum tube headphone amplifier. Im intending to use them in my transformer coupled preamp instead of the raytheon 5842a and was wondering if anyone had a good advice about the bias operating point.
Let me just say that i want to protect my nos tubes as much as possible. They were fantastically articulate, transparent, and quiet. Why yes, yes i did and so what are you going to do about it, punk. Over the course of a few shows, i had a chance to listen to their wa5le which left an imprint on my mind. The very intriguing all vacuum tube phase splitter built into the woo wes. 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. Review by tom lyle as music lovers, headphones have always been a part of our lives.
The woo audio wa7d fireflies ampdac is a combination of high performance vacuum tube headphone amplifier with a builtin usb digitaltoanalog converter and optical input. There is a dedicated port for inearmonitors iems and one for normal headphones. Going further than this, there is the wa33 elite edition amplifier, developed to utilize the best internal components as well as the materials to give a rich, fuller and yet transparent sound to its users. Interesting i had a marshall studio 15 which used 6v6 tubes, always thought they were el84 tubes till after i had sold it. Whether youre shopping for a new amp or trying to coax different tones from one youve got, this comprehensive look at power tubes and their sonic traits is essential reading. To drive the 6c45 tubes to clipping you need 4 volts of swing, so i recommend using the 600. In preamp design and other lighter load applications, this is not really necessary. After damaging my tad ribbon i bought the smallest and cheapest goto tweeter sg 06. Perhaps one of the most eyecatching features of this combination ampdac is the solid block of glass that sits atop both boxes that allows the tubes to remain delightfully visible while providing a protective shell of sorts against random collisions for the tubes. More electron tubes can be found in the tube store collection of new old stock nos if you are looking for a tube shop carrying the very best tubes for your amplifier, youve come to the right place.
The chief engineer, wei wu has been designing tube amplifiers for over forty years. Highquality russian 6s45pe 6c45pe tube, equivalent to the we437. Although the electronic values of both of the tubes are almost identical, they hardly sound the same. Heard they were going for hundreds of buckniks each, on ebay. The new 6c45 sovtek tube the best discover ive recently made is the new 6c45 tube. Whether this was for privacy concerns, such as listening to music late at night, or for use when traveling on a short commute or a long trip on an airplane, headphones are our escape and salvation. The wa33 employs a true fully balanced 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, and all in directheated triodes. There are no semiconductors used in the entire signal path. You asked what people think of the new sovtek tube and i gave you an honest answer. Woo audio wa7 gen 2 fireflies tube headphone amp wdac. A power house to drive even the most demanding fullsized headphones, along with a dedicated mini phone jack tailored for inearmonitors. Parafeed and plate feedback i was asked if the partialfeedback and ultraempathic feedback techniques could be used on a parafeed power amplifier.
The wa33 amplifier contains quad of 6c45 tubes intended for the driver, as well as a quad of 2a3 tubes intended for the power. The 6c45 tube can be used in preamplifier, driver and power stage. The woo audio wa7 fireflies ampdac is a combination of high performance vacuum tube headphone amplifier with a builtin usb digitaltoanalog converter. I need to get some backups for my orange rockerverb 50 and wasnt sure who has the best tubes. The practical situation proves we are right by this.
Woo audio wa7d fireflies vacuum tube headphone amplifier with dac i fell in love. Car demonstrated is 2006 mazda 3 but similar process for. Popular in high powered audio and high end guitar amplifiers, characterized by greater distortion at a lower power compared to other power tubes. Kindly inform me the availability of out put transformer and the main power transformer for this project. This is what i found about the 6c45 used in my r10h. If you are building this balanced and have a full pro level source, go with the 600. Did you know that electroharmonix makes many of the worlds greatest vacuum tubes. Plate voltage 150 heatercathode voltage 100 cathode. Woo audio wa7 fireflies usb dac and headphone amp w. Very high transconductance, incredible linearity, very low noise and low plate resistance. This construction philosophy, i like to call it minimalism. The sovtek 6c45 triode assumes both driver and power tube responsibilities.
Everything you ever wanted to know about output tubes. The 6c45p 6s45p in the western alphabet is a high mu triode with a very high transconductance, incredible linearity, very low noise, and low plate resistance. Im picking up the amp this week, and although i havent seen the user manual yet, from what i can gather, virtually any power tetrode or pentode, including el34, kt88, 6l6 and 6v6 can be used as a driver in this amp. Anyway, 6l6 is an american 30 watt tube, so you can multiply the number of tubes and get the power, two tubes 60 watts, four tubes 120 watts, the manufactures number is just a number, they usually post something that is easy for them to get or will sell the amp, how loud. There are no semiconductors used in the entire amplification path. Get the best deals on vintage electrical transformers when you shop the largest online selection at.
Since tubedepot is in memphis, tn, the home and main hub for fedex and usps, we get very good rates, so rest assured your heavy item will be shipped at the most affordable rates. Another problem these tubes can have, is vacuum defects, but this is a general problem with all electro harmonix 9 pin tubes. Wa7 fireflies 2nd gen headphone amplifier dac woo audio. My first purchase from woo audio was the gorgeous wa7 fireflies. Woo audio wa7 fireflies owners manual pdf download. The 6ns double triodes are enclosed in glass bulb and are provided with an octal base and an indirectly heated oxidecoated cathode. The wa33 employs a true fully balanced 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 all tube design. Plate current 40 ma plate voltage 150 volts grid voltage 9 volts transconductance 45,000 umho 45 mav mu factor 52 interelectrode capacitance input 11 pf output 1. The 6c45 pe is a low power triode 8 watts max for the p d paramenter. Apr 27, 2016 tuan is the editorinchief of maximum pc, and loves all things tech. In both of them the 6c45pi i mounted appear to have severe microphonicity problems. Hmmm, did i just say normal when referring to audiophiles. A guide to power tubes and their signature sounds premier guitar.
Short lifetime for 6ns7 tubes audiogon discussion forum. Our new ehx strings electroharmonix electric guitar strings are customdesigned to our specifications and made in the usa by a premiere string manufacturer. Short lifetime for 6ns7 tubes ive been experiencing a high rate of 6sn7 tubes and their variants becoming microphonic and some going bad way too soon. Mazda drivers window switch controls not working how to. The plain strings are made from the same high carbon steel as the hex cores. The woo audio wa33 elite edition tube headphone amplifier, with focal utopia headphones. Theyre vacuum tubes, and theyre behind the amplification of the audio. Electro harmonics is a very large music accessory manufacturer, with products like guitar strings, effect pedals, etc. Try limiting your search by using the advanced search options below to select an author, a date range, a single forum or more specific search terms. Woo audio wa7d fireflies headphone amplifier and dac. Hes been building pcs and ruffling feathers in the industry for 20 years, and isnt afraid to call out bad products and services.
Single ended classa power amplifier using 6c45pi the valve itself, have a simple circuit enviable any transistor amplifier, however, not many projects that employ a single active component. Tuan is the editorinchief of maximum pc, and loves all things tech. It uses two 6c45 driver tubes, and two of the previouslymentioned. Specially for 6c45 which gets extremely hot, the smallest sign of something not 100% with the vacuum, is a reason to reject the tube. Ive tried to list links where there is 1 a picture, and 2 a schematic. More electron tubes can be found in the tube store collection of new old stock nos. Dec 03, 2017 you can build this amp from the kit available here this amp has been in my head for years. Some of the pages are in other languages, particularly german. Jan 15, 2009 although some people refer to them as power tubes, i feel output is far more fitting.
Description the 6ns 6 double triode is designed for operation in electronic stabilizers. Charlie haden pat metheny beyond the missouri sky 180 gram vinyl lp firsttime 180gram vinyl out of print. Okay, lets get back to topic about overdriving the 6c45. Turn on the amp before properly installing all tubes and power supply. The holes are for the two 6c45 tubes that woo employs in a classa. Woo audio wa7d fireflies vacuum tube headphone amplifier with.
Crazy expensive amplifier thrills headphone aficionados cnet. Were made for military equipment at reflector plant. Without going into details that can turn into a full essay, schiit has stuffed. It uses 845 output tubes, 6c45 drivers and 211s as rectifiers. The company is located in new york and it is a familyrun business. Does anyone have any experience with the sovtek 6c45pie tube. There are similar substitute tubes out in the market, like the ec8020, ec8010, 3a167m, 437a, 417a5842 and etc that could be used but they will give you different output power and gain. There are several brands now for this tube, reflektor, sovtek and electro harmonix. Apr 27, 2016 linear external highperformance power supply remotecontrolled power switching two 6c45 driverpower tubes. I buy nos tubes from only two venders with stellar reputations that are often mentioned here on the forum. The 6s45pe is a highdurable, longlife triode vacuum tube used as a wideband power amplifier.
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