An argument for fuses and maybe power cables in power amplifier

*regulator

It's not that regulators degrade sound, it's that high current regulators get very expensive.  Krell has attempted this, essentially an amp inside an amp, Sanders Magtech gets close.  Class H amplifiers are, loosely, similar.

Everything is in the path, but not everything matters.  As for power cables, I do like to use inexpensive but shielded cables to minimize the possibility of EMI/RFI noise being picked up after my power conditioner.  My integrated includes a large ferrite bead around the incoming power line which in my mind will do far more than anything that can be done by a fuse.

     Back in March 2022: a thread about power cords and break/burn-in was started.

     I hate to type, so: I'm going to copy/paste some of my speculations.

     That a highly complex musical signal, MIGHT affect Poynting vectors and signal speeds*, in interconnects, in a much more profound manner than a simple AC (ie: a fixed 60/50 Hz) signal, in a PC, seems likely (at least) to me, as; in EVERY formula regarding *those two, a signal's frequency (frequencies) always factors in greatly.

     Further: the above and what I'll c/p (seems to me) lends credence to how the application of a stronger, DC voltage/field, outside a dielectric (ala Synergistic MPC and Audioquest DBS systems), might stabilize those vectors and signal speeds, PERHAPS eliminating some time smear and, "burn-in". 

rodman99999 5,456 posts 03-31-2022 at 12:13am    @holmz-       Bear with me a minute, in my folly, far as a possibility on why a power cord might make a difference.       Based on some of the theories on how electricity works, simplified:       The conductor acts as a waveguide for the signal/voltage.       Within the conductor: when excited by an AC current, electrons oscillate, generating photons/electromagnetic waves that travel, always from the source, to the load.        Keep in mind: all signals (ie: music, AC) are sinusoidal  waves        Those photons/electromagnetic waves travel through and outside the dielectric, which (according to it's permittivity/Poynting vectors) will have various effects on those waves.    One of the most obvious is the dielectric's effect on the speed of the signal.       The better designers of printed circuit boards, even take the above into account, when choosing materials for their products.        I posted a link on the first page that included data on the manufacture of semiconductor chips and what was observed when materials were cryo'd, during the process.     Short version: better contact/lowered resistance between layers.           Under the scanning microscope: much smoother surfaces observed.        I would hope, by now, it's a given that various cable constructions, twists, braids, etc, can make for a cleaner transmission of signals (ie: Litz, etc).                     Just seems to me (a hypothesis): given the above (some theories and some things established/measured/proven), it's not a big stretch to believe a power cord, built of the best conductor (ie: Ohno CC silver*), wrapped in a very low dielectric coefficient dielectric (ie: Teflon), cryo'd for the smoothest transfer of those photons/magnetic waves and twisted in some crazy way, might not smooth out some of perturbations/noise, from the crap an AC waveform had to go through, back to it's generator.  (run-on, much?)          *Many mention NOT noticing an improvement with upgraded PCs, when owning Pass Labs gear (KUDOS to Nelson).   Of MUCH interest is the fact that Frank Dickens, the owner of Silent Source cables is basically on staff with Pass and: they voice their equipment with his cables and power cords, made largely with Ohno CC metals.        I haven't tested this, actually comparing two circuits, but: it wouldn't surprise me, if a power supply that used a choke, would be less affected by a better power cord, as the former can eliminate a lot of the high freq garbage, etc, that's either created by, or makes it through all the big converting/filtering stuff, in the power supply, before.        Never thought about PCs before the good stuff hit the market, but: the Physics/QED made sense.             I tried 'em, I like 'em and the science makes my head feel better.                               Don't care WHAT it does to anyone else's!

rodman99999 5,456 posts 03-31-2022 at 12:27am         OH, and: it takes some time for the dielectric to form, take a charge, polarize, or however one chooses to define the process, when a dielectric is subjected to electromagnetic waves, which affects the Poynting vectors, measurably/predictably.                                             The lower the material’s dielectric constant: the longer that takes.                                                               PC (interconnect/etc)  burn-in?    Maybe?

                                                                                         Happy listening! 

                                                   btw:

             I'm not disagreeing with any postings, prior to mine, in this thread.

             ie: everything in the power supply/AC source is in the signal path*.

       *In every gain stage: DC power supply voltage is modulated/magnified, as directed by the musical signal, via the circuit designer's gain device(s), be they SS or valve.

                 A cleaner/more pure DC voltage = more faithful musical output.