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About Pondoro

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  1. I have three or four hour-meters, found in my dad’s barn when he died. They require 12 volts. I’d part with one or two of them if someone had a great plan...
  2. A good point. I don’t design speakers. One question, all those measured parameters that did change, how much would they affect a speaker design? I truly don’t know. But those parameters changed a fair amount.
  3. At last real data. I was sure that flexible rubber, plastic, Kevlar, paper, etc. would break in but I am surprised how long the changes continue. My experience with metal suggests that vibrating metal will not break in.
  4. Interesting article on the placebo effect: https://www.psychologytoday.com/us/blog/straight-talk/201803/the-curious-case-the-growing-placebo-effect
  5. And the placebo test is an attempt to let a limited population determine, once and for all, using proper statistics, if there is any real difference in outcome. That spares the rest of us from wasting time and money on something that has no measurable benefit. Blind testing in stereo is an attempt to do the same.
  6. Jet engines have rotating seals. Leakage increases for a while and then steadies out. They are designed to run correctly with the steady state leakage. Manufacturers carefully break them in before shipment. But it doesn’t take long.
  7. I believe there is some break in period for speaker cones. A woofer is made of paper or plastic or metal, paper has fibers, plastic or rubber or foam have long chain polymers. These fibers flex when the speaker vibrates. I’ve never looked closely at a metal speaker but I’ll bet it has polymers at the inside and outside edges. But imagine a woofer reproducing 80 Hz. It flexes 80 times in the first second! I think the break in period can’t be too long. Now I am very experienced with metal fatigue. Metal has no break in period. You can wear it out (automobile engines dominant end of life failure mode is sliding wear, and careful break in avoids stressing the engine until the lubrication system is running with full flow. You can loosen seals via wear (turbochargers and jet engines need careful break in to get the rotating seals just right). But for back and forth vibration metal either breaks or it lasts forever, depending on how hard you bend it. Or life ends with corrosion or an over stress situation. I don’t believe metal breaks in.
  8. If you sit down and listen to them and it sounds good I would not worry about "do they match?"
  9. I don’t see how this helps anything. The 12 ohm woofer is not going to get louder than it was. The amp will deliver a bit more power.
  10. Near field makes a huge difference. I have a computer desk where I sit with my back to the wall in a 24’ long room. My back is to the wall because I need a green screen for video. I put two Klipsch R-51PM’s on the desk as near field computer speakers. Wow! They sounded great. The ports were firing at the far wall, 20-ish feet away. No one would have recommended those speakers as mains in a 24’ long room. But on my desk they were great. Those were my first Klipsch speakers, my wife has now stolen them for her TV. She’s a great lady and let me replace them with Heresy Ones.
  11. My '83 Heresy set benefits from one or two small (10" 100 Watt) subwoofers. I have never tried it with larger subs.
  12. Is the Heresy 4 ohms? I thought t was nominally 8. I never measured mine...
  13. How long have you had it? (Wondering about like expectancy) Thanks
  14. I have got a bit of a tube bug. I am currently running some 1983 Heresy I's with a Yamaha 5.1 receiver and one or two 10" powered subwoofers. (I own two subs but one seems to sound just as good so the second sub is currently used elsewhere.) I don't have unlimited funds. Some options: Tube Depot Cube 7 - 3.5 watts per channel, all tube (not the power supply), no sub out - $180 Dayton Audio HTA20BT - 20 watts per channel, tube preamp, digital power stages, sub out, $130 Dayton Hybrid HTA100BT - 100 watts per channel, tube preamp, digital power stages, sub out, $165 Future possibility, assuming I fall in love with tubes? Three Tube Depot Cube 7 amps in a tri-amp with the Heresy speakers (I would need some kind of active crossover before the amps) thus total cost would be 3x$180 plus the crossover. I am interested in your opinions. If your opinion is "Forget all of that and buy something more expensive!" I will listen, please give details why. If your opinion is "Forget all this and just put the money into Cornwalls and remain solid state" I would also listen. I am new to all of this.
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