How long of a set of ICs do you need? Your LS100 does have XLR out but it's not a balanced signal, just a XLR jack passing a single output signal. It still might make sense for you to go balance to the input on your KWA100SE. I'd call Dan and ask him. If you do call ask him about the Daedalus DiDs... isolation devices.
Dan sells the DiDs and being a ModWright owner he will give you a nice discount. I use them under my LS36.5 per Dans recommendation. Totally blown away by the transformation on the pre. Doesn't sound like the same preamp; more open, cleaner and unbelievable texture. Listening to upright bass I hear fingers touching and leaving the strings besides just the note. It's drastic what they do and not one of those tweaks that you have to focus hard to hear the difference... night and day difference. Call Dan and ask him his thoughts. He's pretty excited by them and I understand why. I'll be buying more. Alex at WyWires sells the DiDs too.
Back to your needed cable. How long of a pair are you needing? I use Clear Day Cables and one would think Paul pays me to go on and on about his cables. He doesn't but I'm open to some commissions for all the people I have steered to Paul... just kidding. Like many I used to make my own cables and some were pretty good but it's a lot of work and I can't build them for what Paul sells his for. I honestly don't know he does it. He's obviously buying material less than most of us can, but go online and see how much the ends cost he uses and what silver wire cost per foot and you'll see he not making much off of us. I think he just loves making great cables and not too driven by money because he could charge more easily.
Dan and Paul are just two of many great manufactures out there that make this crazy hobby fun. Both great guys that love to talk to their customers and are extremely honest. There's a reason people go on and on about them here.
Good Luck
