Recommandation for 1:6 1:8 SUT under $5K?
I’m looking for some advice on a step-up transformer that pairs well with my Audio Research LS28SE, PH9, and Hana Umami Blue cartridge. I currently have both the Denon AU-S1 and AU-340. The AU-S1 sounds absolutely beautiful—very transparent and open—but at 1:13 the gain is too high, and I’m getting some clipping, especially on dynamic peaks. Even with the AU-340 at 1:10, I can still hear a bit of overload. I’ve tried playing with loading and parallel resistors, but the issue really comes down to gain. I think something in the 1:6 to 1:8 range would be perfect, enough to keep the clarity and tone I’m getting from the AU-S1 but with better headroom. My budget is around $5k, and I’m open to any recommendations for a high-quality SUT?
I cannot ’see’ +db in my brain, I tried to find a chart that had x factors (amount of signal strength gain in my mind) and +db, finally gathered the specs of the many SUT’s that gave some technical answers, then I made a list, the bottom of this page which no one has said is wrong The right column is the ’RESULTANT’ impedance IF the MM Phono Stage is typical 47K. (47k ./. x-factor squared). It shows the INVERSE relationship of Impedance to Gain, which we see in the Lounge Rotary Dial |
Why do I feel Like I am having a discussion with chat GPT?
By definition, Gain is the difference between the input and output and takes into consideration the turns ratio, source and load impedances. It is important to realize the source and load impedances are external circuit variables and not something that can be calculated. The source Z is the cartridge internal impedance and the Load Z is typically the 47kΩ input impedance of the phono stage. It should also be noted that that just because 47kΩ number is the accepted default for MM cartridges, it is not by any means required or mandatory for SUT usage. dave |
WHAT IF? Something is wrong with your cartridge, and it is not too much gain you are hearing. Zenith came up in another discussion, I mentioned a stylus tip's glue becoming temporarily soft, allowing inadvertent mis-alignment, I can make up more absurd low probability, but, what if? That cartridge should be ok with 1:10 or even 1:13 The resultant impedance of lower turns ratios is far too high when guidance is for around 80 or a bit higher 1:8, resultant impedance is 734 1:6 ................................... 1,305 1:4 .................................. 2937 Coil Impedance: 8Ω |
lewm not seem to say, he is saying, and showing with a turn of the knob "this is just two transistors, optically powered" he describes "nice resistors, nice capacitors" ("new organic polymer, I don't know"), so they are involved in the audio path he calls the dimmer/attenuator a 'regulator' 1. you turn the 'regulator' knob (not in the audio path) 2. dimmer makes LEDs emit more or less light (also not in audio path) the wired path 3. pair of light sensitive diodes pass more or less juice via wire to: 4. pair of transistors that make more or less gain via wired input from the photo diodes thus it is not mutually inductive like most SUTs; within his chosen range it is an infinitely adjustable valve, light controlled from wiki "A voltage or current applied to one pair of the transistor's terminals (input from the cartridge) controls the current through another pair of terminals. Because the controlled (output) power can be higher than the controlling (input) power, a transistor can amplify a signal." now, what are the resistors and capacitors doing, he doesn't say, except that they are "part of the magic".
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