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  1. M

    Upgrade Amplifier.

    I often listen to music at low volumes so the variable loudness of Yamaha is very important to me. I'm a bit of a hoarder and have an A-S301, A-S500, R-N602, and just picked up two R-S700s. The thing I like about the R-S700s is the rather unique pre out/amp in jacks on the back. I have about...
  2. M

    Fosi V3 Style Preamplifier

    Maybe a picture of the back?
  3. M

    Bricks List: 36V & 48V Power Supplies (for Fosi, Aiyima etc.)

    I bought a couple of these Meanwell HLG-320H-48 48v 6.7A DC Power Supply - IP67 Rated Fanless power supplies off of a well known auction site for around $44 each (including shipping). I'm using these with Aiyima A07s and they seem to work great. I like the idea of a name brand heavy duty...
  4. M

    What makes The Beatles music still beautifull today

    I think George Martin in the studio helped polish the later works into true gems.
  5. M

    Is Dolby Atmos the Future of Music or a Complicated Fad?

    I am more worried about the two stereo channel mix coming out of an ATMOS remaster than the lower bit rate, but considering I am already getting 24bit 192kHz on some stereo files I certainly don't want mono versions of stereo recordings.
  6. M

    Is Dolby Atmos the Future of Music or a Complicated Fad?

    On Amazon music streaming ATMOS songs is limited to 16bit 48khz while UHD stereo offers up to 24bit 192khz. As a stereo listener guess which I prefer... :( They offer one or the other but not both formats.
  7. M

    Bricks List: 36V & 48V Power Supplies (for Fosi, Aiyima etc.)

    Just ordered a Mean Well SDR-480-48 Power Supply (10amp 480 Watt) off eBay for $40. I noticed in the specs they explicitly state a peak load rating of 150% 740watt (for 3 seconds). I wonder what kind of peak loads these Audio brand power supplies could handle? I find it really tough to...
  8. M

    RCA plugs touching, problem?

    Me being obsessive, I use red and black heat shrink on bare metal RCA plugs. I also use red and black heat shrink to mark speaker wire.
  9. M

    Fosi Audio V3 Mono Amplifier Review

    I am a little nervous about the auto-off function that can't be disabled. I have several Dayton AMPs with auto-off based on input signal strength. I had problems with them not turning on for very quiet audio input, had to turn up volume to get them to switch on. The Dayton amps allow you to...
  10. M

    3-Body Problem

    I'm a big fan of the book Trilogy. I think they did very well with humanizing the characters from the books that were rather one dimensional and not very sympathetic. I'm glad they seem to be including most of the crazy thought experiment level "science" like the "Sophons". This makes me...
  11. M

    Fosi Audio ZA3 Amplifier Review

    I would love to see measured power output comparing only one channel driven with the mono/stereo switch in both positions. How much of a power boost is there in "mono" versus just connecting only one channel? I assume the switch does more than just disconnect on input channel. Also any...
  12. M

    AIYIMA A07 TPA3255 Review (Amplifier)

    For this of us without metal fabrication skills, would drilling a series of holes along the sides of the A07 Help with cooling? I notice the Fosi Za3 pointing out cooling holes as a feature... No need to point out that metal shavings and circuit boards don't mix well.
  13. M

    Bricks List: 36V & 48V Power Supplies (for Fosi, Aiyima etc.)

    I would love to see some actual quantitative testing of these various power supplies so we can see if they actually deliver their rated power on a sustained basis. Also can they put out more than rated power for brief periods? Are the more expensive GAN supplies just smaller? Can a large...
  14. M

    Bricks List: 36V & 48V Power Supplies (for Fosi, Aiyima etc.)

    Warning about Digishuo 48V/5A power supply from eBay and Amazon. Wanted something cheaper than the FOSI 48V/5A and found this on on eBay at half the price. Nice big case and does measure 48V but very light. I found it also on Amazon and thought I would check the reviews. Somebody had posted a...
  15. M

    Bricks List: 36V & 48V Power Supplies (for Fosi, Aiyima etc.)

    I have four AIYIMA A07s and a Fosi Audio BT20A PRO and am trying to figure out if the concerns about sound quality with 48volt power supplies are only at high volume or if this applies to low to mid volume? I like the idea of more headroom for transients when playing at lower volumes. Also...
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