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Brand Sylvania Model 12AU7A Getter Round O Getter Mica Double Mica Plate Ridge Grey Plate Type Double Triode Use Vf 12.6 Volts / If 0.15 Ampere / Indirect One of the most commonly found driver tubes found in push-pull vacuum tube audio power amplifiers is the 12AU7 preamp tube. This tube's low gain make it a great choice for tube preamps in hi-fi stereo systems. Similar/Equiv ECC82 ECC82 5814 6189 CV4003 Condition Tested Tubes per listing 2 Confused about which tubes to get? The differences between 12AX7, 12AT7 , and 12AU7 tubes (Here are the most common applications and options for substituting tubes) Tubes, or valves, are used in all sorts of of electronic equipment. Commonly, you will find the in guitar amplifiers, expensive vintage preamps, HAM radios, microphones, and they come in thousands of different brands, models, and constructions. While there are hundreds of different types of tubes, only a select few are used in pro audio equipment. This handful of frequently used tubes, 12AXY, 12AT7, and 12AU7, can still be confusing to differentiate and understand which is used for what purpose and whether one can be substituted for another. Below we will try to clarify the most common differences between the 12AXY, 12AT7, and 12AU7, and in what circumstances they can be interchangeable. MAIN DIFFERENCES: 12AX7 VS 12AT7 VS 12AU7 The most noticeable difference between the 12AXY/12AT7/12AU7 tubes is the amount of gain, or power, they provide. The 12AX7 has the most gain factor with 100, the 12AT7 comes in next with 60, then the 12AU7 with the lowest gain at 20. Gain isn't necessarily proportionally to sound quality, in the contrary, lower gain values allow for high headroom, meaning a warmer and cleaner sound. This being said, one should should a 12AX7/12AT7/12AU7 depending on what application the tube will be used for and the type of sound wished-for. 12AU7XXX Bangybang.tube 1) If you are looking for large quantities of tubes please contact us. We have hundreds of thousands of tubes for manufacturing purposes, all vintage american made . 2) If you are looking to re-tube and amplifier, guitar amplifier, preamplifier, compressor, equalizer, microphones or any tube equipment, send us the model number and we will take care of the rest, and generate a custom listing for you. 3) Bangybang.tube has thousands of audio tubes not currently listed on reverb, contact us with your custom needs. 4) We carry most USA made brands such as RCA, GE (General Electric), Sylvania, Raytheon, TungSol and PentaLabs , just to name a few. 5) We also carry european brands such as Amperex, Mullard, Telefunken and Marconi , just to name a few but in less quantities. Amplifier Tube, Analog, Audio Gear, Audio Porn, Audio Tube, Bangybang records, EBAY, EBAY.CO.UK, EBAY.COM, EBAY.DE, fender champ, fender deluxe, fender priceton, fender tube, power tube, princeton amp, Radio Tube, rectifier, rectifier valve, tv reception tube, tv tube, Vintage Equipment, vintage rectifier, vintage tube