You probably get sick of all the proposed "changes" to your designs, but I was just wondering what you thought of putting the APT50 (on whichever flare) into a Studio 2 Pi tower? I know that the Motorola Piezo is great for this speaker, but thought that this might be a cool experiment. The two devices have very similar frequency curves and roll off around 3.5 kHz but the APT is more sensitive (around 105 dB). I don't know if this would require a crossover or if the tweeter could just be attenuated to compensate and still run the drivers full range? Thanks for your help.

Rich

Dave

I suggest using the PXBII3K5 crossover and an attenuator on the tweeter circuit much like the cable assemblies used on the larger models of π Speakers having compression tweeters. You'll probably not need the bypass capacitor C1 for top octave compensation, but I'd still recommend analysis with Spice to ensure that the tweeter crossover filter isn't peaking or overdamped. You'll also want a Zobel on the woofer in this configuration and for the same reason.