Amazon offers Prime members the Pyle-Pro 150-watt Compression Horn Tweeter
, model no. PH44, for $12.79
with free shipping
. (Non-members can spend $49 to bag free shipping; otherwise, it adds $6.64.) That's the lowest total price we could find by $5. It features a 15-oz. magnet, 105dB sensitivity, and 8 ohms impedance.