Along with several Pi designs (it's true - not just kissing butt!) I have thought about trying the Marting King design(s). Are you saying that the BSC that he advocates may not be necessary with tube amps? I got the impression that without it, the response was way to high in the HF end? Being able to build them without sacrificing 4 or 5 dB of SPL might make them even more attractive to us low-power SET guys. Your thoughts are appreciated.

Rich