I bought this 12" Delta Eminence to go into a multi-speaker custom bass cab that I was upgrading following a blow out. This 12" combined with a 10" Kappa Pro were what I decided upon after comparing loads of other options. I know I made the right decision. The 12" proved itself to be highly responsive, powerful and tonally excellent. Whilst it cuts around 3khz (which is still very high for what can be used as a sub-woofer component) - I don't notice it whatsoever as the Kappa 10" provides all the other higher frequencies, plus incredible, articulate mids.The power of the 12" Delta LFA ultra-low bass response is also very evident, you don't need 15" or indeed 18" speakers when you use this one! I have used both JBL and EV speakers in the past and have not been so impressed with those when I compare them with the Eminence speakers I have now! 100% recommended for quality and price. Excellent value for money.