Electro-Harmonix 12AY7 / 6072A Vacuum Tube

Pros are it cuts volume good and retains top end…so I use mine for practice at low levels or to take two channels where one is louder than the other. However, I did find they tighten up the bass and cut lows…this may be desirable or not. It using a Fender deluxe style Botique amp. I much preferred a Ge NOS 5752 which are going upwards of $60 now, but we’ll worth it! You can find those on Reverb.But great tube also to put in V1 if you just use V2 clean channel as well…as some circuits past through the first V1 section to V2. At the price it’s worth it for sure! But it def cut lows, and in some recording applications this may be useful…you def can crank your volume and for the price it’s worth having one on hand.Personally I’ll probably put another GE Nos 5751 in my V1. Those are rated about 70% over the stock ones at 100%. But this tube is the one for HRD amps and ones that are crazy loud for home. Like I said only upside or downside is bass is less.

I use this in the V1 in my 59 Bassman reissue. Sounds better than my GE and JANS. A great tube!

I have now put two of these tubes into tube microphones that I have modified. In the quest for the best sound I can get, I have also spent much more money on a few NOS tubes. After allowing days of burn-in and critical listening, I really wanted the NOS GE 12AY7 tubes I bought to sound better, but the plain fact is that these Electro-Harmonix 12AY7 tubes out-perform them in every way. For a start, the EH tubes have a much lower noise level than NOS tubes I have tried. Secondly, they just sound sweeter in this application.In the past, the only other tubes I have used that match these for audio fidelity were milspec JAN Philips ECC88 (6DJ8) tubes, made in the 80's (different heater pinout, but similar in spec). If you are wanting to replace the stock Chinese 12AX7 in a tube mic, these 12AY7's are a great option for a clean sound at a very reasonable price and will save you the trouble of finding a good NOS tube when many of them are of dubious quality.

The product was shipped quickly and easy to install. The amp sounds better with the new tube.

Quiet enough for a microphone! Sound great. Well packaged. Now if only I could remember the coupon code I got with it so I can buy more

I purchased this tube to swap for one of the 12AX7s in an Electro-Harmonix LPB2UBE pedal. I then modified the pedal so that it would switch between the 2 tube amps when you stepped on the footswitch instead of turning it on & off. I'm very pleased with the result, the 12AY7 tube here is on the left side and provides lower gain for the root part of songs, then I can switch to the 12AX7 on the right for higher gain for solos & whatnot. Electro-Harmonix seems to have a high-quality standard in their products and I'm extremely pleased with this purchase.

Used in V1 of a Fender Hotrod Deluxe to "tame the beast". I like the new character of the amp. Made the volume knob less touchy. Still a very loud amp but it gives it more breathing room to find the perfect texture in-between clean and overdrive.

Low gain pre amp valve. Came packed well and works as expected. It took the edge off my High Dynamic Range gain which was what I wanted to do. It's not 1/2 the gain however, I don't know how these are measured. I dropped the gain a noticeable amount using the same gain settings but it's hard to measure it empirically. My goal was to drop some of the high gain and this valve did the trick.