DizRotus Posted September 22, 2014 Share Posted September 22, 2014 (edited) This 2nd-hand owner of these DIY single-driver speakers has no idea what the crossover is intended to accomplish. "These Crossovers have the role of separating the signals that go to the speakers and send each speaker only the frequency ranges that are adequate for it. Homemade crossovers use capacitors, resistors and coils to separate the frequencies." http://www.ebay.com/itm/Realistic-Fostex-FE-103-Pair-of-Speakers-40-1197-with-Cross-Overs-/151418508573?ssPageName=ADME:SS:SS:US:1120 Perhaps the top half of the driver gets the high frequencies and the bottom half gets the bass. I know notch filters are often used with single-drivers, but that's not what the original builder was trying to do here. Edited September 23, 2014 by DizRotus 2 Quote Link to comment Share on other sites More sharing options...
tigerwoodKhorns Posted September 22, 2014 Share Posted September 22, 2014 He is on the right track: "Large cross overs, these crossovers were installed by the gentleman I purchased these speakers from they are plenty for these speakers..." You do not want to buy a speaker that does not have enough crossover, but rest assured, these do in fact have plenty. What are the caps and the coil for in this speaker? Limit the response to a certain range? 1 Quote Link to comment Share on other sites More sharing options...
DizRotus Posted September 22, 2014 Author Share Posted September 22, 2014 I suspect the crossovers allowed the original owner/builder to use them with "sub-woofers" of some sort. They're useless with just these single-drivers. 1 Quote Link to comment Share on other sites More sharing options...
Guest Steven1963 Posted September 22, 2014 Share Posted September 22, 2014 (edited) I'm more interested in these as an economical way to re-insulate my home. Edited September 22, 2014 by Steven1963 1 Quote Link to comment Share on other sites More sharing options...
derrickdj1 Posted September 22, 2014 Share Posted September 22, 2014 He said they were homemade. They look like it. Quote Link to comment Share on other sites More sharing options...
Daddy Dee Posted September 22, 2014 Share Posted September 22, 2014 (edited) I do not think the drivers are Fostex. Looking at the enlarged pics, the back of the driver is printed with the text: "Realistic FE-103" Does Fostex make speakers for Radio Shack? That would be interesting. Edited September 22, 2014 by Daddy Dee Quote Link to comment Share on other sites More sharing options...
The History Kid Posted September 22, 2014 Share Posted September 22, 2014 I do not think the drivers are Fostex. Looking at the enlarged pics, the back of the driver is printed with the text: "Realistic FE-103" Does Fostex make speakers for Radio Shack? That would be interesting. I noticed the part number too is a valid Radio Shack SKU, but I don't know enough about vintage audio to make any kind of assessment. Quote Link to comment Share on other sites More sharing options...
moray james Posted September 22, 2014 Share Posted September 22, 2014 I do not think the drivers are Fostex. Looking at the enlarged pics, the back of the driver is printed with the text: "Realistic FE-103" Does Fostex make speakers for Radio Shack? That would be interesting. You bet those are Fostex with a Realistic brand on them, Fostex supplied a number of drivers for Radio Shack under the Realistic brand name. Best regards Moray James. Quote Link to comment Share on other sites More sharing options...
DizRotus Posted September 23, 2014 Author Share Posted September 23, 2014 (edited) I have six of the Radio Shack FE-103 RS 40-1197 drivers and a single Fostex FE 103. Fostex did make the RS 40-1197 drivers for Radio Shack. They are similar in appearance, construction, specs and performance, but the real Fostex is superior. The 40-1197s have a cult following in DIY and single-driver forums.I use the single real Fostex as the center speaker for the TV. I had to cover the back of the speaker grill with black grill cloth so the tan banana pulp cone wouldn't show through.The black driver is an RS 40-1197, the tan driver is a Fostex FE 103. Edited September 25, 2014 by DizRotus Quote Link to comment Share on other sites More sharing options...
djk Posted September 23, 2014 Share Posted September 23, 2014 The "crossover" is a notch filter to reduce the midrange. Quote Link to comment Share on other sites More sharing options...
mustang guy Posted September 23, 2014 Share Posted September 23, 2014 (edited) Would those be classified as folk art? The "crossover" is a notch filter to reduce the midrange. I had never heard of that. I looked it up and found this interesting info: http://www.allaboutcircuits.com/vol_2/chpt_8/5.html ...and a calculator: http://www.mh-audio.nl/parallelnotchfilter.asp Edited September 23, 2014 by mustang guy Quote Link to comment Share on other sites More sharing options...
ClaudeJ1 Posted September 23, 2014 Share Posted September 23, 2014 The "crossover" is a notch filter to reduce the midrange. That be my vote. Quote Link to comment Share on other sites More sharing options...
cradeldorf Posted September 24, 2014 Share Posted September 24, 2014 (edited) 103's are a damn fine sounding speaker IMHO. Edited September 24, 2014 by cradeldorf Quote Link to comment Share on other sites More sharing options...
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