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Technical/Modifications

Talk about updating & modifying older speakers and other technical/electronic information here.

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  2. KSW-12 Driver Replacement

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  4. The value of DIY 1 2

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  5. Disc Player That Outputs 44.1 kHz as 44.1 kHz 1 2

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  • Recent Posts

    • I do level, then set the crossovers, then do time alignment as I described.  Things should be done in this order.  Even setting level later will impact the crossover point (it sounds like you already are aware of this, but I'm putting it here for others).  The slope at the crossover region is seldom a brick wall, so there is plenty of overlap for the time alignment method I describe.   Technically, FIR filters don't impact phase (using them for woofer to midrange and midrange to tweeter), so really I could go back and adjust things out of order, but for the low order bessel filter I use for my woofers and subs I definitely can't do that obviously.  
    • and, of course..."She was the queen of the ROLLER DERBY!'''and many other greats by Leon...wonderful album!
    • I'll bet you have to get a permission slip to take one of those knives out......
    • Last night, just coincidentally, I worked on trying to 'time' align my 4 subwoofers.  I have 4 DIY identical subs placed in the corners of the room.  I ran sweeps for all four and decided that both rear subs needed a 3.93ms. delay.  Measurement was made with the mic at ear height, room sweet spot, with mic pointing up at the ceiling.  It is a calibrated mic BTW.   My added delays made sense from the viewpoint that my LP is closer to the back subs than the front subs.  Based on Chris' idea, I ran the spectrogram plots and here are the results.  As you can see, the delay helped things quite a bit.  But....I think things can be improved.  In pondering how to do that, I looked at the phase plots and it is clear that the rear subs, with the delay are still a bit out of phase with the front subs.  Tomorrow I will work on aligning the phases and see if that improves the SPL plots.    Clearly there is something to be said for aligning drivers, or subs in this case. I am curious to see if phase aligning all four subs will improve the SPL between 100-200hz.  I am motivated to really getting a handle on this time/phase alignment stuff.     
    • @rockhound, werent you in the market for a pair? 😂
    • 100% Maple, 100% Canadian.   Wb
    • @HDBRbuilder   When we were married here in the States, a filipina niece and husband were at the house for a couple of days. They had brought their karaoke machine with them. I had it plugged into the system with my LS. After he had been singing a while he commented on how great it sounded. As he leaned in toward the speakers he said, "oh... they're Klipsch... no wonder."   Later, when we visited their house, I found out they had Bose ht cubes. Such is life. We often forget how great our Klipsch systems are, because they are our normal.
    • Sing songs from the lp all of time . Tightrope&..."sitting side the highway...in a broken van. .. thinking of you again.  Guess I'll have to hitchike.  " Nice...
    • Let me know once shipping is an option and you offer a lay-a-away plan.  
    • This belongs to a friend of mine, and I have it listed for him.  Its got a week to go, on eBay, and its only at a dollar bid as I type this !!!  Very high quality pair, simply read the ad and do some research.   https://www.ebay.com/itm/293289849327   Thanks for looking.   Jeff Medwin
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