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Burning in hi-pass capacitors

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  • #31
    Re: Burning in hi-pass capacitors

    No need to crack open the wallet; surplus Russian milspec teflon caps are all over eBay for peanuts, sometimes as little as $1/ea. Or less.
    Don't listen to me - I have not sold any $150,000 speakers.

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    • #32
      Re: Burning in hi-pass capacitors

      Originally posted by billfitzmaurice View Post
      If you want to become an oddiophile cut a small hole in your pants pocket. Walk to a toy store, buy enough marbles to fill said pocket. Walk home. When you've lost all your marbles you are an oddiophile.
      That was hilarious.

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      • #33
        Re: Burning in hi-pass capacitors

        Originally posted by Leroy R View Post
        Audio grade electrical outlets?!?!? I thought Monsters over sized and over priced cables were the biggest marketing ripoff in the audio industry.
        Nah, you haven't come across the cable lifts yet. Or even better, Brilliant Pebbles.
        R = h/(2*pi*m*c) and don't you forget it! || Periodic Table as redrawn by Marshall Freerks and Ignatius Schumacher || King Crimson Radio
        Byzantium Project & Build Thread || MiniByzy Build Thread || 3 x Peerless 850439 HDS 3-way || 8" 2-way - RS28A/B&C8BG51

        95% of Climate Models Agree: The Observations Must be Wrong
        "Gravitational systems are the ashes of prior electrical systems.". - Hannes Alfven, Nobel Laureate, Plasma physicist.

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        • #34
          Re: Burning in hi-pass capacitors

          Nah, you haven't come across the cable lifts yet. Or even better, Brilliant Pebbles.
          Don't forget the clever little clock...
          Don't listen to me - I have not sold any $150,000 speakers.

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          • #35
            Re: Burning in hi-pass capacitors

            Or those wooden diffuser sticks
            Craig

            I drive way too fast to worry about cholesterol.

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            • #36
              Re: Burning in hi-pass capacitors

              Originally posted by carlspeak View Post
              Bryan K.

              Midwest Audio Club

              Speedster | | The Wildeman | Sean's NLA Towers | , COUGAR II and | Triton | Lithium | J-Boom | Trym MLTL | Docere MLTL

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              • #37
                Re: Burning in hi-pass capacitors

                Originally posted by bkeane1259 View Post
                Carl that is an excellent idea and awesome write-up, but here's why I would have to 100% disagree with the test's findings. Please correct me if you think I'm wrong. In the test, you're using what appears to be a PC USB mic which I'm assuming is running thru an integrated PC sound card. The signal simply cannot be captured and replicated (in high fidelity) that way, like it can be captured and processed by the human ear. Thus, with the info fed to Raven Pro being adversely affected by the microphone/sound card processing, I can surely see how the software would not pick-up important subtle nuances between the caps and lead one to conclude that the end result is similar across the different brands.
                This is only a valid critique if the frequency dependent system noise, sampling resolution and bandwidth of the measurement system is in fact analytically inferior to those parameters of the human ear. (I was doing a bunch of similar optical measurements the other day, so I still have this on the brain).

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                • #38
                  Re: Burning in hi-pass capacitors

                  I'm sorry, but I would never buy NPE's. Mass manufacturers use them because they are cheap and that is the only reason. They are garbage. I guarantee you would notice a huge difference right out of the ziplock bag by trading up to Dayton's. http://www.parts-express.com/pe/show...number=027-421

                  If anything, you will notice a larger sound stage and more transparency in the midrange and high-end....does wonders for stereo imaging. I don't find that burn-in is a factor with Dayton 5% caps either, so they are good to go right out of the box. No joke.

                  I have built several sets of speakers, but my favorite project is fiddling with crossover rebuilds. It might surprise you how much better a $100 set of vintage used or even new mass-produced speakers sound with better internals.
                  Bryan K.

                  Midwest Audio Club

                  Speedster | | The Wildeman | Sean's NLA Towers | , COUGAR II and | Triton | Lithium | J-Boom | Trym MLTL | Docere MLTL

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                  • #39
                    Re: Burning in hi-pass capacitors

                    Originally posted by Tony G View Post
                    This is only a valid critique if the frequency dependent system noise, sampling resolution and bandwidth of the measurement system is in fact analytically inferior to those parameters of the human ear. (I was doing a bunch of similar optical measurements the other day, so I still have this on the brain).
                    Psssh...Dude, there is NO WAY that USB mic in the write-up coupled with a standard integrated PC sound card can capture the spectrum needed for proper analysis. Please.
                    Bryan K.

                    Midwest Audio Club

                    Speedster | | The Wildeman | Sean's NLA Towers | , COUGAR II and | Triton | Lithium | J-Boom | Trym MLTL | Docere MLTL

                    Comment


                    • #40
                      Re: Burning in hi-pass capacitors

                      Originally posted by bkeane1259 View Post
                      Psssh...Dude, there is NO WAY that USB mic in the write-up coupled with a standard integrated PC sound card can capture the spectrum needed for proper analysis. Please.
                      I never said anything about proper analysis My argument still stands.

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                      • #41
                        Re: Burning in hi-pass capacitors

                        So, has anybody done a scientific test comparing a USB mic and PC sound card resolution with human hearing's capability and correlated the two? Please, site me some references or links.

                        Mayby I should have done some listening tests of the tweeter's output. I'm sure my anecdotal comments would have been well received. ;)

                        The mic was provided by a German audio software company that sells a high resolution audio response software program (Kirshner audio's ATB-Pro). The software was very detailed in it's output. However, visual examination of the waveforms did turn up any obvious differences. This highlights the crux of the problem of finding very subtle audible differences in caps, resistors, wires, etc.....

                        As I wrote in a later post, I plan to repeat the set up with a better mic using the ATB-pro software and take a more quantitiative approach.
                        Live in Southern N.E.? check out the CT Audio Society web site.

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                        • #42
                          Re: Burning in hi-pass capacitors

                          oh boy did you pick the WRONG FORUM for this question. You'd be better off getting in touch w/ Jon L over at the circle...

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                          • #43
                            Re: Burning in hi-pass capacitors

                            As far as my project goes, I've made up my mind. In the end, I will be letting my ears (and a buddie's ears) be the judge. Promise to be honest :D

                            I'm getting an 8 Ohm 100W Non-Inductive Dummy Load Resistor.

                            I have seasoned Jantzen Superior Z's, so no burn-in required.
                            I will also be trying these:
                            ClarityCap 8.2uF ESA Caps
                            Sonicap 8.2uF G1 Caps
                            Dayton PMPC-8.2 8.2uF 250V Precision Audio Caps

                            The plan is to build the XO's and swap the 4 hi-pass caps and compare.

                            I will first compare the 3 pairs of brand new caps against the seasoned Jantzens. I am very familiar with the "Jantzen sound" of these speakers so it should be fairly easy to compare brand new (unburned) caps against these.

                            Jantzens will be put to the side while I burn in (via dummy load resistor), half of the new caps. Then a side-by-side speaker comparison will be done with a mono music signal, to judge whether there is a noticeable difference in sound quality between the burned-in dummy load caps and the brand new caps.

                            Finally, the balance of the caps will be burned in the exact same way as the first half and then a full comparison will be made across all four manufacturers. No test equipment - only two sets of ears. Should be fun.

                            I'm no scientist.
                            Bryan K.

                            Midwest Audio Club

                            Speedster | | The Wildeman | Sean's NLA Towers | , COUGAR II and | Triton | Lithium | J-Boom | Trym MLTL | Docere MLTL

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                            • #44
                              Re: Burning in hi-pass capacitors

                              Originally posted by Tony G View Post
                              I never said anything about proper analysis My argument still stands.
                              +1. Even such a 'primitive' rig still exceeds the capabilities of the human ear/brain by a wide margin.
                              Originally posted by carlspeak View Post
                              So, has anybody done a scientific test comparing a USB mic and PC sound card resolution with human hearing's capability and correlated the two?
                              I haven't done anything 'scientific', but I have no illusions that I, or anyone else, can hear differences in response with anything even remotely approaching the accuracy of my USB mic/soundcard.
                              Last edited by billfitzmaurice; 03-31-2011, 11:16 PM.
                              www.billfitzmaurice.com
                              www.billfitzmaurice.info/forum

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                              • #45
                                Re: Burning in hi-pass capacitors

                                Originally posted by bkeane1259 View Post
                                I'm no scientist.
                                Neither are a lot of people here. Do what you gotta do. And have fun!;)

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