Dave A Posted March 7, 2019 Share Posted March 7, 2019 I have spent some time looking tonight and did not find this schematic. Anyone have a copy? Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted March 7, 2019 Share Posted March 7, 2019 8 hours ago, Dave A said: I have spent some time looking tonight and did not find this schematic. Anyone have a copy? I may have a spare one at the house I can send you to reverse engineer. Quote Link to comment Share on other sites More sharing options...
windashine Posted March 7, 2019 Share Posted March 7, 2019 Dave, I have this spec sheet, that describes the crossover, just an fyi... KP301 spec.pdf Quote Link to comment Share on other sites More sharing options...
windashine Posted March 7, 2019 Share Posted March 7, 2019 Another thread with a B version ? link near the bottom to a pdf https://community.klipsch.com/index.php?/topic/94532-kp-301-crossovers-what-do-the-x-over-experts-think/&_fromLogin=1 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted March 7, 2019 Share Posted March 7, 2019 Looks like it. Quote Link to comment Share on other sites More sharing options...
Dave A Posted March 7, 2019 Author Share Posted March 7, 2019 What I was wanting to know was why the extra small barrier strip? I figure for biamping but since I am not doing this I was wondering what on this crossover is not needed and thinking of removing the unused components. This is a really crowded crossover. My thought is there must be a best way to configure this crossover for passive only use that may well improve the sound. If there is nothing to be gained then I would leave it alone but the similar Chorus crossover is sure not this complex. Quote Link to comment Share on other sites More sharing options...
Dave A Posted March 7, 2019 Author Share Posted March 7, 2019 3 hours ago, windashine said: Dave, I have this spec sheet, that describes the crossover, just an fyi... KP301 spec.pdf Thanks. Wonder why they made the LF separate from the HF? Quote Link to comment Share on other sites More sharing options...
windashine Posted March 8, 2019 Share Posted March 8, 2019 21 hours ago, Dave A said: Wonder why they made the LF separate from the HF? there is another diagram on page 4 of the pinned crossover thread, when entering this technical forum section (the 2nd post on that page) and if I was to wonder, the polarity on the tweeter uses the mid range opposite connection (positive from negative connotation) thus, referring to the unknown's... such as why, but only answered by raising your hand to answer with (a wire got us here)…. Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted March 8, 2019 Share Posted March 8, 2019 1 minute ago, windashine said: and if I was to wonder, the polarity on the tweeter uses the mid range opposite connection (positive from negative connotation) thus, referring to the unknown's... such as why, but only answered by raising your hand to answer with (a wire got us here)…. If you're wondering why some tweeters and squawkers are wired out of phase it's because some crossover components cause a phase shift and it's corrected by changing the polarity of the wiring at the drivers. 1 Quote Link to comment Share on other sites More sharing options...
windashine Posted March 8, 2019 Share Posted March 8, 2019 5 minutes ago, CECAA850 said: some crossover components cause a phase shift so I'd reckon that the inventor didn't want the LF in the equation.... only to work best by itself Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted March 8, 2019 Share Posted March 8, 2019 Just now, windashine said: so I'd reckon that the inventor didn't want the LF in the equation.... only to work best by itself The mid and high sections of the crossover are made to be acoustically in phase with the woofer. Quote Link to comment Share on other sites More sharing options...
windashine Posted March 8, 2019 Share Posted March 8, 2019 acoustically phased > by physical observation or mechanical detection > voltage directive's from multimeter's > component gate's > flood control > 1919 vs 2019 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted March 8, 2019 Share Posted March 8, 2019 14 minutes ago, windashine said: acoustically phased > by physical observation or mechanical detection > voltage directive's from multimeter's > component gate's > flood control > 1919 vs 2019 I have no idea what that means. Quote Link to comment Share on other sites More sharing options...
windashine Posted March 8, 2019 Share Posted March 8, 2019 9 minutes ago, CECAA850 said: I have no idea what that means. me either lol... just thinking in term's for the last 100 year's. I saw a picture in the news this morning, with some T-38 jet's breaking the sound barrier, and all I thought about were Dave's bi-amp connectors on the back of his 301's... Quote Link to comment Share on other sites More sharing options...
Deang Posted March 8, 2019 Share Posted March 8, 2019 It’s a stupid feature that customers want, so the company caves and adds it - because if they don’t, then it’s something the competition has that they don’t. It’s marketing, not engineering. 1 Quote Link to comment Share on other sites More sharing options...
Dave A Posted March 9, 2019 Author Share Posted March 9, 2019 16 hours ago, Deang said: It’s a stupid feature that customers want, so the company caves and adds it - because if they don’t, then it’s something the competition has that they don’t. It’s marketing, not engineering. So is it's intent to allow cutting of jumpers between barrier strips and to bi-amp these? 17 hours ago, CECAA850 said: If you're wondering why some tweeters and squawkers are wired out of phase it's because some crossover components cause a phase shift and it's corrected by changing the polarity of the wiring at the drivers How do you measure for or detect phase shift? Quote Link to comment Share on other sites More sharing options...
glens Posted March 9, 2019 Share Posted March 9, 2019 Phase shift in the crossover is a known-enough quantity. For each order it will be +45 degrees for high-pass and -45 for low-pass. The "order" will be the number of elements excluding impedance-control or response-shaping. In from reference (0 degrees) it would be -90 for the woofer; +90 for the mid from the bottom, no reversal from there from the top (no low-pass elements); +135 for the tweeter. If the woofer and mid drivers had their voice coils in vertical alignment they would be "completely" out of phase with each other at their crossover point and it's fairly typical one of the two would be wired backwards. (My youngest brother was given a pair of consumer-level JBL 2-way bookshelf speakers and gave them to me knowing I'd been a fan of JBL (at the time I was running nothing). I had them on a high shelf in the garage and noticed (Medwin-wise-ly) that interstation FM noise changed character as I lowered and raised my head to below and above the box. They have 2nd-order filters on each driver wired in phase from the factory (I looked it up). I reversed the wires on the tweeter and the "sound check" smoothed almost completely out, staying a (fairly) steady sshh instead of an exaggerated sshhwwsshh when passing vertically through the two drivers axes.) Chris A has shown many (and variously produced) examples of both the direct measurement of phase angle and time responses using a mike and software. 1 Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted March 9, 2019 Share Posted March 9, 2019 5 hours ago, Dave A said: So is it's intent to allow cutting of jumpers between barrier strips and to bi-amp these? Normally it's a single wire on the back of the input cup that connects + to + and - to - . Quote Link to comment Share on other sites More sharing options...
glens Posted March 9, 2019 Share Posted March 9, 2019 A single wire each Quote Link to comment Share on other sites More sharing options...
CECAA850 Posted March 9, 2019 Share Posted March 9, 2019 1 hour ago, glens said: A single wire each Yes. Single wire + to + and single wire - to -. Quote Link to comment Share on other sites More sharing options...
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