Thanks for this! I love messing with inexpensive audio components and purchased a pair of KB-15 speakers for $99.00 on sale. They replaced a set of JBL Studio 40's ($53.00 on sale) on my main computer, but the result sounded odd and was definitely lacking lower frequencies. Amazon just happened to have the Polk PSW10 sub on sale for $89.00 at this time and it was added to my system a couple days later. The sub took care of my low freq problem, but it also exacerbated the odd sound which was now an obvious error in the crossover slope as I couldn't get the sub rolloff correct. Using my Google Foo, I immediately went to task in finding any crossover mods that may be out there, hoping to save precious time over building one from scratch. The above post by RYBN was the only thing I found after scouring the web for a couple hours, and thinking the lower end Klipsch bookshelves use many of the same parts, I decided to try the 10uF cap trick. I dug up a couple 100V, axial electrolytes and soldered them in parallel to the 3.6uF cap. The result was phenomenal! The speakers are now balanced to the point that I was able to get the sub right where it needed to be in less than 5 seconds. At that moment the KB-15's and PSW10 disappeared, replaced by a rather wide and somewhat accurate soundstage! I'm in love with this setup now, and quite amazed at what can be done for very little cash. I will continue to tweak this setup until I get bored and start all over again with a new batch of inexpensive components. If anyone is interested, I have these connected to a Behringer UCA222 DAC, SainSmart 6n3 tube preamp kit outfitted with NOS GE JAN-5670 tubes, and a Sound Appeal SA-100T T amplifier, all purchased from Amazon. The entire system from DAC to speakers was right around $350.00, but sounds like I spent a fortune!
