I just finished building this pair on monday night. They sound really accurate, moreso than my old DIY speaker. They have a 6.5 inch woofer and a 1inch silk dome tweeter. The cabinet is 5/8 inch MDF and is lined with acoustic foam. The crossover is a linkwitz reily variaty 2nd order electrical and acoustical at 2khz. It encorporates a baffle step compensation of 4dB I believe. It has very impressive bass output for the size of the speaker. The box is tuned to 43hz and is around .5cuft internal volume.