Thank you very much for this page. Thanks! This is the future of ribbon mics. Last, a 1 MegOhm load (or greater) isn’t always desirable. The difference was significant. Call or Chat for expert advice and to hear If you’re mic pre has a hi-Z input (usually for instruments like guitars and usually 1/4″) you can try it yourself. I was really hoping to get a lot more output since I often run into noise problems with those mics. A Gear Adviser is ready to take your questions, Looking for something else? Just because it’s old doesn’t mean it’s magic or sounds good. MXL. So a sucker for this kind of … Also, transformers are poor drivers of long cables. If so, this would result in a mic that works fine, but has 6db less output. Well if you got +4.8 dbs and I’m -1.2dbs that definitely sounds plausible right? MOST TRANSFORMERS ACTUALLY BENEFIT FROM A SMALL AMOUNT OF LOAD, and the only way to figure out where yours sounds best is to listen to it using different values of resistance shunted across the primary to provide a resistive component to the load. The rich sound of ribbon mics made affordable for the home studio. It sounds more flat after this mod. On the point of the over priced pre-amps ,I think you are forgetting labor. When I get more high end than the VTB1 I hear no sonic improvement. Condenser mics have active buffer amps INSIDE the mic and now ribbons are starting to do the same, as they should. I’ve done tests with borrowed gear costing several thousand dollars (albeit with built in compressors which push up the price) all the way down to the ART Tube MP Studio for $30. The key words here are “stable impedance” (caps by me) and “maximum compatibility with microphone preamplifiers”. thanks for writing in. Just as a note for anyone else doing this, it may be worth your time to take the head basket off and look at the ribbon itself; my was loose and sagging, sagging as far as being almost out of the magnets at the deepest part of the sag. If you buffer the secondary so that it feeds a load in excess of 30K ohms then you’ll get a flat response. On the other hand a friend used a Lundahl transformer on his R144 and this appears to have had a large impact on sensitivity and actually improved the S/N ratio and reduced “hiss”. Also 2 ohms is a large number for ribbon motor output impedance and sounds like an inaccurate measurement. So the mic came and it didn’t suck. Ok but let’s say you don’t have even $200 to spend on a microphone. So i don’t think it’s necessarily that case that every ribbon mic demands an unusually high input impedance to sound its best. NOT GOING TO HAPPEN without problems. Thread Tools. Our Gear Advisers are available to guide you through your entire shopping experience. Orders placed before 5 p.m. These impedances are FANTASIES. If you build one use a non-inverting circuit configuration to avoid resistor noise on the input and a TI LME49860 Op-Amp with an input noise density of 2.7nV/sqrt(Hz). I love the sound of ribbon mics. FOLLOW THE LINK BELOW TO READ-ON AND LEARN HOW TO MAKE YRSELF A REAL-NICE SOUNDING RIBBON MIC IN 45 MINUTES FOR UNDER $100…. thanks for the info. How much would you charge for an original design? This item is backordered but is available to reserve now. So a 2.5K source is supposed to drive a load as low as 600 ohms on the input of a good mic pre PLUS the cable capacitance. So I am going towards the Cascade Fat Head, but…Here’s my question: Does the MXL R40 with EDCOR mic transformer sound better then the Fat Head? CLICK HERE to listen to some apples-to-apples action, a thin metal ribbon suspended in a metal frame alongside a magnets, “MXL R40 Ribbon Mic $59.99” (still avail for $69.99), You read some other folks’ assessment of the stock R40 at this link, EDCOR made a 1:37 ribbon mic transformer that only cost $23, Ribbon Mic Rennaisanse coverage in the popular press, http://www.gearslutz.com/board/so-much-gear-so-little-time/597135-mxl-r40-ribbon-microphone-4.html, https://www.gearslutz.com/board/so-much-gear-so-little-time/969538-ribbon-mic-transformer-upgrade.html, https://www.youtube.com/watch?v=RRCFZY3wH4o, “The Microphone Wardrobe,” Absurd Audio-Technica Offering c. 1981, Johnson Sound Systems of Manitoba circa 1951. I also plan to post the recordings of the MXL R40 using both inputs (1.5 Megohm and 300 ohm) on my VTB1 using the stock transformer so everyone can hear the difference when the transformer is unloaded (a 1.5 Megohm load is almost like having no load at all). 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