Do different 12ax7 preamp tubes sometimes referred to as ecc83 and equivalents such as the 12at7 make any sonic difference. Your other choices are the gt12ax7m mullard copy which is a long plate tube and while a little noiser than some others it is excellent in certain applications. It was released for public sale under the 12ax7 identifier on september 15, retrieved from s. Electroharmonix 2880 users reference manual pdf download. Electroharmonix introduces the oceans 12 featuring two simultaneous, independent, stereo reverb engines, series and parallel control for the dual reverbs, 24 presets and advanced io allowing for stereo inout, splitting reverbs to left and right channels, or mono sendreturn with pre and post reverb options. Unknown to most people, eh also made a line of guitars in the 70s. Type 12ax7 is a commercial equivalent of the cv492.
The 5814a is a militaryindustrial grade 12au7 with low noise and high. Each wound string is precision wrapped with round nickelplated steel onto a high carbon, hexagonshaped steel core. Ecc83 tubetypes electroharmonix12ax7eh the eh12ax7 tube has a nice balanced sound, a very low noise floor and e. The electro harmonix 6v6 is warm sounding, with a sweet sustain and crunchy overdrive, making it a very musical tube. The first shot, 2 extremely microphonic 12ax7s, since they were in the return period, aes sent replacements. Tubes free delivery possible on eligible purchases.
Our new ehx strings electro harmonix electric guitar strings are customdesigned to our specifications and made in the usa by a premiere string manufacturer. The biggest difference for the positive is when i switched to tad el84 tubes better overall sound and it did sound better than the mullard el84 even with all the hype. Electroharmonix tubes are all new designs and are of excellent quality. On the inputdriver front, the stock electro harmonix 12ax7eh battled it out against the cryod g. These valves give a very rich tone and are sonically sweet. I also pulled a couple of the ei el84s out of my tead linear a. Ehx also selects the best tubes well balanced, best test data etc for their gold line. Electro harmonix will repair or replace, at its discretion, a product that fails to operate due to defects in materials or workmanship for a period of one year from date of purchase. View pdf brochure for 12ax7 ecc83 electro harmonix twin triode. This 12au7 offers smooth tones and clear definition which is why its no surprise that this tube is often found in hifi equipment as well as guitar amplifiers. I wanted to get 2 mullard el84 tubes to try out, got them put them in and not much difference. For a fender deluxe reverb, out of a full set of electro harmonix tubes, just pulled out the last bad one. High gain preamplifier tube with ultra low noise and detailed musical tone. A medium gain dual triode built with the quality and reliability that weve come to expect from a jj tube.
The first products had been the lpb1 booster and the legendary big muff pi. Get a low price and free shipping on thousands of items. The pins are plated with gold to prevent corrosion and to protect the pins. When i went on the drive channel sound lost bass and treble. It packs a lot of bite with its higherthannormal gain. This power pentode is the perfect replacement for the vox ac30 output tubes. Media in category 12ax7 ecc83 the following 48 files are in this category, out of 48 total.
Electro harmonix 6922 this was boxed a number of ways. Electro harmonix 6h30pi datasheet pdf datasheet catalog. This tube features balanced sections and gold plated pins. Finally, an electroharmonix version of the el84 power tube. Due to the method of production in regards to the glass, measurements may vary slightly. View and download electroharmonix voice box quick start manual online. Many amp manufacturers fit these as original equipment. Electro harmonix c9 organ machine emulation guitar effect pedal. At the bottom of this page youll find some links to other tube datasheet sites in. Many oems use relabeled electroharmonix vacuum tubes in their amplifiers. Latest version with support rods to reduce microphonics. The bugle boys are spoken of in nearly the same hushed and reverent tones as the mullards are around here.
Tungsol 6v6gts are the holy grail for players who crave the sound of a fender princeton, deluxe or champ, or those who. The electroharmonix 12au7a ecc82 is a brand new preamp tube that is made in russia. This is the electro harmonixs 6h30pi twin triode tube. Electroharmonix voice box quick start manual pdf download. One of the topselling tubes with a large following because they perform time and time again. The 12ax7 is the american part number for the ecc83. New electroharmonix 12ax7 ecc83 gold pins gain matched octet. It is manufactured in russia and is a very durable valve.
Lpb1 demo by larry demarco linear power booster preamp. It is a premium quality 12au7 tube built to match the performance of the. Or call us at 800 2224700 sweetwater s sales engineers are regarded as the most experienced and knowledgeable professionals in the music industry, with extensive music backgrounds and intense training on the latest products and technologies. Matched pair of 12ax7 preamp vacuum tubes also ecc83, 7025 high gain preamplifier tube with ultra low noise and detailed, musical tone. The 12ax7 is a highgain typical gain factor 100, low plate current triode, and is therefore best suited for use in the preamplifier input and midlevel stages of audio amplifiers, guitar amps, mic preamps etc. Electro harmonix el34eh vs jj el34 tube shootout the. Electro harmonix 12ax7 preamp vacuum tube ecc83 matched. Electro harmonix tubes are quite simply the absolute best.
Electroharmonix 12ax7 is a quality replacement for 7025. The reissue genalex gold lion ecc83 b759 recreates the sound signature of the original. Ecc83 tubetypes electroharmonix 12ax7 eh the eh12ax7 tube has a nice balanced sound, a very low noise floor and e. The 12ax7eh is a dual high mu triode with a spiral filament and special construction to minimize microphonic behavior. Electro harmonix, 300b, 12ax7, 6l6, hot rox uk hot rox uk. It is best known for a series of popular guitar effects pedals introduced in the 1970s and 1990s. The electro harmonix 12au7ecc82 is a premium quality low gain preamp tube that is great for low noise applications. Probably 1975 or 1976 david cockerell developed a flanger for electro harmonix they named electric mistress.
I had these electro harmonix el84 tubes in my glow audio amp one. The only thing that carries over from their other designs is the rather tubby bottle they fit into. Unique spiral filament eliminates filament to cathode induced hum common on amplifiers that use ac on the filaments. They are a good blend of tone, reliability and price. Electro harmonix is a new york based company that makes highend electronic audio processors and sells rebranded vacuum tubes. The sound is nice much smoother than the jj 6v6 i had in there previously. The 12ax7 is a highgain typical amplification factorlowplatecurrent triode best suited for lowlevel audio voltage amplification. The tungsol 12ax7 ecc83 is the gold standard of preamp tubes favored by guitar tone junkies, and one of the most important links in your tonal chain. Out of 5 tubes, 2 12at7s and 3 12ax7s, every single one was bad. Clearly this was new from the ground up and not a reworking of something else. Electro harmonix has released the allnew 7025 model and its quite a departure from their previous offering. Most of the datasheets are in pdf format and some are links to other html pages. Please see the substitutes at the top of the page for more details.
The 12ax7, also known as ecc83, is a vacuum tube that is a miniature dual triode 6av6 with high voltage gain. The new electro harmonix 12ax7eh is a good choice in marshalls for those who want a more vintage sound or think the jjteslas are too bright. Vacuum tube 12ax7 ecc83, electroharmonix amplified parts. Eric is correct that the 12ax7eh electro harmonix is the same as the gt12ax7r, however the gt is guaranteed for 6 months as all their tube are. Electro harmonix says this about their tube, the el84eh tube faithfully recreates the classic mullard design. Trilam plate material and selected screen wire increase thermal dissipation. Electro harmonix ehx 12ax7 ecc83, 7025 manufacturers description the 12ax7 is a high gain preamplifier tube with ultra low noise and detailed, musical tone. It was developed around 1946 by rca engineers in camden, new jersey, under developmental number a4522. Electroharmonix 12ax7 preamp tube 12ax7eh electroharmonix. In overdrive mode the valve has a hard cutting sound with plenty of punch.
Ecc83s, v3 electro harmonix 12ax7 and the drive channel sound balance keeps clear sound. We design and manufacture our tubes, engineered for demanding high. This tube is great for the driver position in amplifiers and provides an excellent and detailed soundstage that is impressive. Feb 17, 2009 visit for user videos, our blog, community fourms, and lots more. A recommended output tube replacement for peavey classic 30 and fender blues junior. Double triode quick reference data anode current ia1,2ma transcoductance s1,6mav amplification 100 heating heating is indirect by ac od dc, with serial or parallel supply. The 12ax7 was originally intended as replacement for the 6sl7 family of dualtriode amplifier tubes for. High gain, ultralow microphonics, and superb linearity with a dynamic 3d sound.
Due to the combination of low gridplate capacitance and medium gain, it is suited for use in audio voltage amplifier with an extended frequency range. The electro harmonix 12ax7 ecc83 is a hi gain preamp tube that produces. In european usage specialquality valves of some sort were often indicated by exchanging letters and digits in the name. Electro harmonix ehx 12ax7 ecc83, 7025 preamp valvetube. Download a pdf file of gain comparison of current production 12ax7s here. This applies only to original purchasers who have bought their product from an authorized electro harmonix retailer. All structured data from the file and property namespaces is available under the. The electro harmonix is oem in most current guitar amplifiers. To be labeled genalex gold lion, tubes must endure and pass the toughest testing the industry offers. They make this tube with slightly different data on purpose, to get a special kind of distortion, in amplifiers for electric guitar, which their chief engineer jc morrison refereed to me as brown sound. In 1968 mike matthews founded electro harmonix in ney york for producing and distributing guitar effects pedals.
I like them the best with the shuguang 9th generation a close second. Vacuum tube 12ax7 ecc83, electroharmonix image 1 vacuum tube. This is the electro harmonix s 6h30pi twin triode tube. Unique spiral filament eliminates filament to cathode induced hum common on amps that use ac on the filaments. Tungsol 12ax7 v 12ax7eh discussion in amps and cabs started by wesman61, apr 26, 2009. You can use acrobat for viewing and printing pdf files. The 12ax7eh provides high gain with ultra low noise and detailed, musical tone that rivals the most desirable nos types. Buy electroharmonix 12ax7 ecc83 preamp vacuum tubes three pack. View and download electro harmonix 2880 users reference manual online. The electro harmonix 12ax7 is definitely a good choice for your amp.
Tube depot carries a selection of 12ax7 ecc83 7025 cv4004 pre amp vacuum tubes. The 12ax7 was originally intended as replacement for. If you have a sonic frontiers or arc they will help you have a more palpable. It was released for public sale under the 12ax7 identifier on september 15, 1947. In addition to making fine pedals, electro harmonix has a line of tubes. View and download electro harmonix voice box quick start manual online. The electro harmonix ecc82 12au7 gold pin is made in russia and provides a rich, warm and well balanced sound. Get the guaranteed best price on power tubes like the electroharmonix el84 matched power tubes at musicians friend. The electro harmonix 12ax7 is a standard tube that can be used for a variety of applications, but i use these for my guitar amplifier. The model of the 12ax7 is a popular tube these days because it is cheap and gets the job done pretty well. We design and manufacture our tubes, engineered for demanding high fidelity, reliability and overall warmth. Midrange response has slight muddiness with a nice. They currently come in electro harmonix boxes, but weve also had them branded sovtek, or with the original military markings calling them a 6h23.
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