those jbl1500s wouldve been great for those who were considering tempetests and blueprint 15"s,but actualy enjoy fidelity!
also for Basshorn usage ,handy extra xmax for that low frequency cutoff!I dont expect much bass from that woofer however with its real low Qts,but the intention is quality,so it certainly would be 'tight' This seems to be the latest trend in the diy circles,ultra damped sealed boxes.