The Bugle's a great design and the use of OPA2134 opamps probably helps its sound too. Replace the stock opamps in this $100 XO with OPA2134's and you may end up with something very decent.My experience with active XO and multiamp-ing is that even if the XO is so-so, you'll still get a huge improvement. The only reason why I don't have my system in this configuration full-time is that my wife finds it hard to use.