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  1. DonH50

    Tower vs bookshelf

    Having them in a small space in no way restricts their performance, and they will provide fuller lower midrange and bass than bookshelf speakers even if crossed to a sub. The wall on the right does add reflections but that will be the same for bookshelves. On stands, the bookshelf speakers will...
  2. DonH50

    Magnepans 1.6 no sound

    Yeah, may be... Magnepan would likely replace the panels and contact assemblies (terminal strips). When I got a quote to rebuild my old MG-IIIa's some years ago, it was cheaper than I expected at the time, so worth a call or note just to see. But I think the OP is overseas so shipping alone...
  3. DonH50

    Magnepans 1.6 no sound

    I agree with @Alrainbow that is serious corrosion. The bass section is wire on the diaphragm, the tweeter is Al foil traces. The foil/connector contacts can be an issue over time (dissimilar materials tend to react with each other and become open) but it does look like the foil traces are bad. I...
  4. DonH50

    Magnepans 1.6 no sound

    The conductors should have fairly high resistance but what do you measure?
  5. DonH50

    Fuse and Cable Directionality

    This thread appears to have wandered back to just everyone attacking everyone else, and I need to go practice then enjoy the rest of my Sunday after church and then dealing with on-going tax questions (blah). Y'all have fun... On topic: I still do not think fuses are audibly directional, but I...
  6. DonH50

    Fuse and Cable Directionality

    He's a member of ASR, still with the AES, has presented a few talks at the PNW Audio Society, and is quite approachable. He's still giving lectures now and then, and we've corresponded a bit online and on the phone. At some point all of us appeal to some sort of authority, unless we claim to be...
  7. DonH50

    Fuse and Cable Directionality

    Auditory memory is very short, something like six seconds per the AES (or IHF, or somebody). But there is also plenty of evidence for long-term awareness of subtle changes... Which may or may not survive a DBT. But psychoacoustics is NOT my area of expertise!
  8. DonH50

    Do you know my name?

    Sorry Kal, I stand corrected! I forgot Arnie was the (ahem) genesis of Genesis! I miss that guy...
  9. DonH50

    The WBF humor and joke thread.

    Sorry if this is a repost, old but I just saw it again. Maybe I posted it the first time, in which case I need to find a similar one about memory...
  10. DonH50

    Magnepans 1.6 no sound

    Infinity's EMIT and EMIM drivers were a mess for a while; I was constantly having to touch up the connections when they cracked and opened under stress. Al driver strips to brass (IIRC) eyelets ("rivets") soldered to wires provided several points of failure. At the time they authorized the shop...
  11. DonH50

    Magnepans 1.6 no sound

    Good advice. Unless the fuse was measured good it is suspect, and sometimes even then. I loved the people who wrapped the fuses in foil, or bypassed with the wire, as it generated a fair amount of repair business for the shop I worked. I have seen blown ribbons in both sides, and blown...
  12. DonH50

    Fuse and Cable Directionality

    I would not consider it "extreme", but fairly basic, and as I said most of that was done about 40 years ago. I rarely measure except when setting up a new system or component (last was when I added some speakers, couple or three years ago). There's always the jump to conclusions in these debates...
  13. DonH50

    Fuse and Cable Directionality

    No, Scott is of no relation to Amir, and denigrating an alternative point of view is just as arrogant in my book. Nobody knew, or least I did not and I doubt Scott did, your credentials, but that was not the point at all. Questioning is not always an attack, and I tend to use "argument" in the...
  14. DonH50

    Fuse and Cable Directionality

    It was not testing for errors, it was testing to see if a certain thing (component, wire, EQ setting, whatever) was reproducible and repeatable, did it make the difference we thought it did? Too often we found what we thought we heard, we did not, or we did but it had nothing to do with what we...
  15. DonH50

    Fuse and Cable Directionality

    A combination of DBT and ABX testing. This was some 40 years ago but was one of the defining moments for me in audio, when I realized how much perception and things like mood when listening and such affected the results. I went from hearing every atom in the cables to what I feel is a more...
  16. DonH50

    Do you know my name?

    Sorry, not sure I follow... Infinity had what I considered a premier line with the IRS at the top, way back when I was more involved in audio (say late 1970's to early 1990's). The company almost disappeared, then was reborn as more of a midrange but competent line, then became more of a...
  17. DonH50

    Do you know my name?

    I am not a fan of GR Research but whatever. There are other places to measure them, but I would just see if they work first, and if not check the fuses, then send them to a regular tech. They are 92 dB/W/m so moderate sensitivity, and I think they have a powered woofer, so tube or SS would be...
  18. DonH50

    Magnepans 1.6 no sound

    Check the fuses? He said he did that in his first post. Over time the foil traces tend to degrade and eventually open, my guess is that's what happened here. Though back when I was repairing them I did find bad solder joints inside at times.
  19. DonH50

    Fuse and Cable Directionality

    Pretty condescending. I think he was arguing the technical merits, listening tests have not been performed except for sighted tests? I too am curious if you have conducted any sort of more rigorous testing to prove your theory? I have done some recording and mastering work, and worked with some...
  20. DonH50

    Fuse and Cable Directionality

    I thought @Analog Scott was just responding to @SeagoatLeo 's points in this thread? Maybe you should report both of them. And me for this post, I suppose. Wait, I'll put in an on-topic line: Fuses are not directional. Whew! :)
  21. DonH50

    Do you know my name?

    As Rob said, Composition Overture 1's, image below from a quick search. 1" tweeter, pair of 4" mids, and side-firing 8" woofer. Waveguide on the tweeter, manual here: https://www.manualslib.com/manual/76941/Infinity-Ovtr-1.html
  22. DonH50

    Magnepans 1.6 no sound

    Magnepan will generally rebuild speakers for fairly modest cost. Shipping may be expensive if you are overseas, however. But I would contact Magnepan and see what they say.
  23. DonH50

    Fuse and Cable Directionality

    Skin effect is real enough, though a problem at frequencies well (decades) above audio, but I do not recall in decades of dealing with it on my day job that skin effect itself induces directionality. But it has already been said that science, math, physics, theory and all that jazz is...
  24. DonH50

    Fuse and Cable Directionality

    As much as adding any other sort of super-duper expensive directional fuse?
  25. DonH50

    Fuse and Cable Directionality

    Drift velocity is very, very low, see e.g. https://en.wikipedia.org/wiki/Drift_velocity -- that article lists about 23 um/s for 1 A in a copper wire. It depends upon both the current and voltage difference unless the wire is superconducting. But for AC, they move back and forth, there is...
  26. DonH50

    Fuse and Cable Directionality

    The whole Al wire panel thing was a disaster that took years to undo with copper pigtails and proper Al/Cu interfaces for service inlets and panels. I am sure there still many, many of them out there. I had power conditioners in mind as part of the problem masking the real (underlying) issue...
  27. DonH50

    Fuse and Cable Directionality

    It might have been interesting to loosen and retighten connections on the original panel just to ensure oxidation and/or reduced contact pressure did not cause higher connection impedance that led to the sonic differences. Nice job with the panels! I think a lot of 'philes spend a lot of effort...
  28. DonH50

    Fuse and Cable Directionality

    I can't speak to "sonic gain" and such, but the rest of it is (ahem) sound advice. The safety ground is also important. One thing nobody ever does is to go back every few years and retighten all the connections in the service and inspect outlets, especially those subjected to high current...
  29. DonH50

    Tinnitus Resulting from Covid or Vaccines

    Just saw this; my best wishes for a full recovery, Dave! My wife and brother are still suffering long covid symptoms to varying degrees after several years now, and I know some folk who have had severe reactions to the vaccines, so have some feel of how hard it is to deal with. Not sure where...
  30. DonH50

    Fuse and Cable Directionality

    Going by this: You said "the signal moving toward the wall" (way from the speaker) can be ignored, yet current flows in a loop, so in any two-terminal device such as a speaker the current that goes in must come out. If you break the loop, no current flows, so I do not see how you can say the...

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