I have a friend who got all into the Black Gates and did like the sound I know that they probably do deliver a bit for the money – – but nothing close to what they cost. It's those very expensive foil capacitors made out of various types of plastic and high-tech dielectrics and maybe some silver and other nice materials. There are a few other capacitors that have specific uses and very rare cinema equipment that get a little bit expensive as well – – but I know what you were talking about. That even covers the rarest of the Western Electric paper oil capacitors in perfect operating condition that are on top of the sound, also collectible. I can't think of any that would be worth paying more than a a few hundred/each (max!)) for (at this time). I hate to say that – – because I do also sell very expensive capacitors, just nothing close to that. To that end, I think $1000/ea for any capacitor is too much. Alligator clips will be your best friend and best teacher. Will they sound good? Some will, and some won't - depends on type and brand as per previous discussions, I guess.Īny rate, crossover circuitry is absolutely nothing special.do go there, and don't stay in the dark.get involved in your design (use a simple 1st order or 2nd order circuit and play from there), and do some experimenting. You guys might want to check those rejected caps that way - results likely won't be what you expect. How all this might apply to a LV audio signal (10 - 30 volts ish AC) is very much in the air, but to some extent is observable on a Freqency-Impedance sweep test. Most types of "Leaky" caps subjected to HV 200~600V DC (aka 0 hz) will slowly reform, but some only to a point. Keep in mind, ESR is a test made in the non-audio domain (usually 100khz where the mosquitos listen?), and "leakage" is a test for HV DC applications, not LowVolt AC like music. The special KS version of the Jensen A15PM woofer, was 16ohm (reads around 11ish DCR as I recall) But everything was wired up a little bit differently back then. The other hi-fi era WE systems – – like the 753 came in a variety of impedances. Last time I chatted with Joe, he had an interesting working theory, or perhaps just an observation that WECO had a nice ecosystem going with the lovely 171C OPT (arguably the best sounding, and most flexible in the world, really) - and it has a nice 4 ohm tap perfect for the full range speakers.īy the time everything was plumbed into the crossover of the WE757 system – – I think the system was strapped for to present a 16 ohm load – – but will have to go back and look at that. But when you go shopping for some of the fancy "Fru-Fru" audiophile caps - strange values I've noticed are scarce or really expensive. In reality anything approximately close usually works pretty well. For the bigger or lower uF figures, you can certainly find these values surplus online pretty quickly. just run the calculator and you can see the values of the chokes and capacitors simply change for the low impedance coils. Other than WE and a few RCA other odds & ends, we didn't see low impedance in HiFi until the later Solid State, "wattage wars" era.īut it's no big deal. ie the WE755,WE728, the 713 drivers (most of them) etc were all very low nominal impedance for the era - back then the norm of course was 16ohm for most all drivers, then 8ohm by the early/mid 60s. Yeah, the "Feeling of Prescence" era Western Electric components. I was just discussing this with a customer setting up a 713B/728 combo. I might inquire about the silver foil versions.Ĭlick to expand.That makes sense. The dealer said that the caps were quite good for "cheap" caps (only about $1,000 each). The speaker sounds "drier" and cleaner than with the vintage paper in oils, but, I sort of like the sound. I recently heard a speaker being built in this store where some vintage paper in oil caps were originally used for the build but they have been replaced with new Audio Note copper foil caps. The other problem is that even if the caps are within specification for capacitance and leakage, it is hard to find ones with low ESR and a number of caps have been acquired and rejected for this project. I don't know about crossover design so I am leaving this up to him, but, the caps he wants are quite expensive. The midrange driver in my system- Western Electric 713b-presents a bit of a problem because of its low impedance compared to the rest of the system such that high value or parallel caps will be needed. It is taking a fairly long time finding the paper in oil Western Electric caps he wants to use for the crossover. I have a local dealer who is trying to assemble the parts for a crossover for my speakers.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |