This speaker uses the Dayton Esoteric 7″ paired with a Peerless Corundum 1″ Tweeter. These plans give you both a ported and sealed version for these passive speakers along with the crossover. The end result is a very smooth and relaxed sound. The ported version is full range with sound going all the way down to 32hz and a flat response up to 20khz. These were originally designed for Doublsmm on YouTube for his theater. Stay tuned for his review of them.