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yamafied

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Posts posted by yamafied

    Kpt-100

    in Klipsch Pro Audio

    Posted

    Here is the KPT-100-D schematic.

    I've not tested this myself but I would suggest you try to bypass the .3mh coil and the 7ohm 25watt resistor(or reduce it's value) in the tweeter circuit. This will give you the most high frequency extension. Note: the (RXE 075 and Parallel 200ohm 25 watt resistor) is the poly switch protection circuit for the tweeter and if you want to test it listen at a moderate level and temporarly short across it and listen for any significant spl increase (A significant spl increase would indicate it's value has changed and is out of spec).

    The (1.1mh/15uf/7ohm 25w series RLC circuit) in parallel with the woofer is centered on 1239Hz with a banwidth of 1012.8Hz so this results in a reduction in this region. If you take this circuit out listen to vocals especially and see if it is perceived as better or worse.

    Without doing some acoustical testing this is my best suggestions for you to try.

    miketn

    Thanks for this! This is exactly what I was looking for.

    Kpt-100

    in Klipsch Pro Audio

    Posted

    Ok, so after having brushed up on my schematic reading skills, I would say that this "KPT-100D" that I have must be the same as the 100B. The part that confuses me is the number of resistors. Everything else seems to match up. I am now analyzing this to determine what I could pull out to defeat the x-curve. My thoughts at the moment are that getting rid of the 15uF cap and the .4 mH inductor might do this. I would be grateful for any input that any of you might have. This is not my field of expertise by any means.

    Posted Image

    Kpt-100

    in Klipsch Pro Audio

    Posted

    Thanks for the response, however, I might be even more confused now. If the 3000Hz is correct, I will have more (cheaper) options in terms of passive networks. That does seem a bit high to me though. I am pretty sure that mine do have the x-curve. I have to push the levels 3-5db's up in comparison to my other Klipsch speakers (that are of the same era and have the same sensitivity) to get them to blend well. Even then, the highs and lows just don't seem like they are there.

    Oddly, I also got an email from Klipsch support this morning stating that it was 65Hz, which definitely can't be right. I assume the rep thought I was asking where to cross my sub over, but even then, the low end for the KPT-100 is 75Hz.

    Surely with the number of these things that seemed to have been dumped on to the market in the last year or so, someone has tackled this project. I will have to take Speakerfritz's advice and create a new post. I tried to put this in the correct place (Pro), but maybe somebody in the consumer area has done this.

    Kpt-100

    in Klipsch Pro Audio

    Posted

    Does anyone know the crossover frequency for the Kpt-100? I want to try some prefab crossovers to get rid of the "x-curve". If anyone knows how to mod the factory crossover to eliminate the "x-curve" roll-off, that would be welcome info as well.

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