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  1. dBel84

    Monoprice Monolith Liquid Platinum - By Alex Cavalli

    @dstarr3 if you cannot get it rma'd your plan to use the wall switch will be fine. What's happened, for whatever reason, is the mosfet switch which sits in standby has shorted leaving the amp on all the time. You will neither do the amp, nor the tubes any harm with your work around. A little...
  2. dBel84

    Orthodynamic Roundup

    @Philimon typically low bass is difficult to localize ( obviously more directional in headphones) but i would try listen to general music as opposed to specific test tones or sweeps. I suspect that your brain will "autocorrect" for it to sound pretty decent. looking at the test results -...
  3. dBel84

    Orthodynamic Roundup

    Congrats, I doubt this will have significant impact on the sound.
  4. dBel84

    Orthodynamic Roundup

    There's no holding you back! Excellent work.
  5. dBel84

    Orthodynamic Roundup

    You are approaching this the only way it can be done. Trial and error till you find your sweet spot. It always fascinates me how you can get so close and then tweak a little more and lose the thread altogether. Your mission to get this right has inspired me to revisit some older attempts that I...
  6. dBel84

    Monoprice Monolith Liquid Spark - By Alex Cavalli

    Don't assume that you are hearing the amp noise floor. Ground the inputs and repeat. If you don't hear it this time round, the noise is coming from the source. With that said, if I use sensitive headphones with almost any amp and turn it up to max, there is a low level white noise from the...
  7. dBel84

    Monoprice Monolith Liquid Spark - By Alex Cavalli

    Great to hear your favorable impressions E. I would echo that this amp is "crazy good" , I have actually been deferring to using mine which sits on top of a much more expensive amp..dB
  8. dBel84

    Orthodynamic Roundup

    Picked this pair up for $75 in pristine condition . dB
  9. dBel84

    Orthodynamic Roundup

    Well after a long hiatus and after letting my Yhd1 go to a fellow planar, I impulse bought an HP1. And so the cycle repeats itself.... :) .. dB
  10. dBel84

    Monoprice Monolith Liquid Platinum - By Alex Cavalli

    For those who have not seen atomicbob's measurements, they near mimic those of the Crimson and this is what he had to say about the stock power brick. "Residual noise is non-existent, with provided SMPS. All of the measurements represent engineering excellence. Well done Dr. Cavalli!" ...
  11. dBel84

    Monoprice Monolith Liquid Spark - By Alex Cavalli

    You may have missed my above link but here are the measurements . It is incredible, probably what a true high end amp should look like, very little noise floor. Flat frequency response and near perfect square waves. .. dB
  12. dBel84

    Monoprice Monolith Liquid Spark - By Alex Cavalli

    Measurements published by BobS "Reference levels : +9 dBu 300R 16.00 mW - 110 dBSPL @ 98dB/mW 0 dBu 300R 2.00 mW - 101 dBSPL @ 98dB/mW -10 dBu 300R 0.20 mW - 91 dBSPL @ 98dB/mW -20 dBu 300R 0.02 mW - 81 dBSPL @ 98dB/mW +9 dBu 30R 160.00 mW - 110 dBSPL @ 89dB/mW 0 dBu 30R 20.00 mW - 102 dBSPL @...
  13. dBel84

    Monoprice Monolith Liquid Spark - By Alex Cavalli

    Opamps are irrelevant, they are control servo only. This amp is discrete front to back. .. dB
  14. dBel84

    Orthodynamic Roundup

    The original Joe Grado HP1 and HP2 are actually very good.
  15. dBel84

    Orthodynamic Roundup

    then you join axtran on "The List"
  16. dBel84

    Orthodynamic Roundup

    I have been having some offline discussion with WoH regarding mods to the YHD1 and I thought I would share my "secret sauce" for these ( and other) orthos. We all know ( as the original manufacturers understood ) that closed cell foam has some amazing properties that make it suitable for...
  17. dBel84

    Orthodynamic Roundup

    Take a look at this article https://www.innerfidelity.com/content/how-planar-magnetic-headphones-work Look for images of disassembled Yamaha ortthos and then look at thhe PM3 or early Russian orthos. There are several threads on DIYaudio on making planar driver's, all great info. ..dB
  18. dBel84

    Orthodynamic Roundup

    don't take this the wrong way , but don't If you want to try and experiment - start from scratch with a frame that can hold the magnets . The Yamaha or original Fostex are not geared towards easy magnet switches. The OPPO PM3 is sort of what you are trying to do ..dB
  19. dBel84

    Orthodynamic Roundup

    Variable like the 3, but more comfortable. I have found it is easier to make the 2 sing compared to the 3. Often very close to a well tuned 1. ..dB
  20. dBel84

    Orthodynamic Roundup

    Those are great results! This is all Ischabible's work. ..dB
  21. dBel84

    Orthodynamic Roundup

    It is all so personal and variable. I really like the HP1 stock, even better modded. Especially the aniso-magnets, but my modded YHD1 is still preferred over any of the Yamaha orthos. I had let most of them go, but have randomly re-aquired all but the HP1. (No, not the YH5M or HP1000 either)...
  22. dBel84

    Orthodynamic Roundup

    Yes "those ones" , thanks BMF. YH/HP2 - common Brown version, just bass heavy which allowed for creative heavy damping. I transplanted YHD2, have the YHD1 "stock" YHD1 still legendary, puts YH100 to shame all round. ..dB
  23. dBel84

    Orthodynamic Roundup

    Lucked out on a relatively good set of yh2, sound pretty spectacular after modding, really don't need to go down a rabbit hole again..... I did dust off some off the oldies and took a stroll down memory lane, the Russian beasties pack some serious bass ..dB
  24. dBel84

    Cavalli Audio

    The quality of the units from Massdrop is remarkably good. Higher than my expectations were and first rate by anyone's standard.
  25. dBel84

    Orthodynamic Roundup

    Cool find, these look immaculate. Just my opinion, but I think you could get away with keeping the stock pads. I never remove them, I gently lift the edge over the screw which keeps the pads intact. There is a trick to this, use a small flat screwdriver and work the edge up gently and...
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