Just an FYI for anyone tinkering with speakers or considering sending one to Danny for possible improvement. Working on a $3K retail set of speakers from a well respected manufacturer. Push on terminals used on crossover board and all driver connections. Did impedance sweep on as manufactured condition. Impedance sweep after ONLY changing to solder connections at the drivers (woofer, mid, tweeter). R(e) 0.3 ohms less with soldered connections. Don't know yet if there will be an audible difference. Getting rid of potential connection problems is worthwhile peace of mind.