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Edgar

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Edgar last won the day on November 12 2013

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    Wright City, Missouri USA

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  1. https://columbiamo.craigslist.org/ele/d/boonville-vintage-klipsch-chorus/7755797221.html No Affiliation.
  2. Yes, I saw that https://paducahhometheater.com/products/klipsch-ki-396-sma-ii. And I need four of them.
  3. OK thanks. I don't get into St Louis County very often; Kirkwood is actually a pretty long drive. If you find a buyer then don't wait for an answer from me. I've just started thinking about this and haven't made any firm decisions, yet -- still looking for candidates and checking my piggy bank. GLWS
  4. @MookieStl, approximately where in StL are you located?
  5. Yes, thanks, I though about painting. But it seems like such a terrible thing to do to such a nice piece of equipment.
  6. I'm in the market for some new speakers. Can't afford Cornwall IV, so I'm wondering how KI-396 compares for sound quality. @MookieStl, yours are local and tempting, but I'd want them in white. Thanks, Greg
  7. That is why the ears should always be the final arbiters.
  8. OK, I just skimmed the entire thread, and did not see the following mentioned anywhere: Look at Figure 8 here. This is a typical distortion characteristic for a class AB amplifier. This happens to be a brute, an Adcom GFA-565, but lower-power class AB amplifiers distort in much the same way -- their distortion curves will just be "slid", in entirety, toward the left side of the graph. The important point is that the distortion at very low power (left end of the graph) is almost 20 dB higher than it is just before clipping (right end of the graph, just before the point where the curves suddenly shoot upward vertically). So if you're connecting your 99 dB sensitive speakers to this amplifier, and it's spending all of its time below 1 Watt, you're experiencing about 20 dB more harmonic distortion than if you used a low-power amplifier with just enough headroom to handle transients. Too much of a good thing is a bad thing. Unfortunately, that even applies to too much power.
  9. Don & Kathy's House of Music, Saint Louis, MO, around 1977. Klipschorns. Fleetwood Mac, "The Chain". The kick drum in the opening gut-punched me like I'd never experienced before. Later, during the bass riff toward the end, I could almost see the bass notes rippling through the room. Very impressive to an 18-year-old (at the time).
  10. The volume control can be implemented as a multichannel analog attenuator, after the crossover, or in the mathematics of DSP crossover itself. In theory, analog volume controls are superior to digital volume controls. Analog controls reduce the noise level along with the signal level. Digital volume controls reduce the signal level but the noise floor remains the same (and then, only if the signal is properly dithered after attenuation). In practice, as long as the noise floor of the DAC is below the noise floor of the listening room (or of the other electronics), it is a non-issue. And with modern DACs, this is fairly easy to achieve. In addition, digital volume controls are superior in terms of channel tracking and attenuation accuracy.
  11. In addition to being severe overkill, it can actually backfire on you. It is not uncommon for a Class-AB amplifier to have considerably more distortion at very low power than it does just before clipping. A fairly typical example of that is shown in Figure 3 here. With super-efficient speakers like the Jubilee, you're likely to spend nearly all of your time below 1 Watt, where distortion is at its highest. Other amplifier types may behave somewhat differently. Class-D can be better or worse, depending upon implementation. And you're probably not considering a 500 Watt Class-A amp.
  12. OK I get that, but what if I showed up at his door, in person? The location in the St. Louis ad was only about 50 miles from me. What would have happened if I had called his bluff and wanted to hear the items before buying?
  13. Still worth a double-check, though. For just a few dollars, that gadget is a nice thing to keep around anyway. Ah, well, that eliminates one possibility. Still useful as general knowledge. Another thing to check: I once encountered a situation where everything on one particular circuit acted strangely. The wiring checked-out OK. When I looked at the breaker, I found that it had tripped, but only partway -- literally the lever was partway between "ON" and "OFF". There was just enough continuity to satisfy the receptacle-testing gadget, but under load things got weird. I reset the breaker and all was well again.
  14. Neither question is dumb; both are standard procedures in a case like this. Also check to see if the "hot" and "neutral" connections in the wall plug are reversed. One of these will do the job for you. I have a (solid state) amplifier that only hums when the ground is lifted. I have another (solid state) amplifier that always hums unless I use one of these.
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