CT Sounds engineered the NEO65-4 pro audio speaker to be the loudest midrange speaker we have ever released in company history, if you like your music loud you have come to the right place. The loudspeaker utilizes a CCAW voice coil (more expensive than copper voice coil) which allows this speaker to perform exceptionally well at middle to high frequencies compared to the competition. While most manufacturers cheap out and go with a N35 (most common) CT Sounds spared no cost utilizing the highest grade neo magnet available, the N42. Power handling: 250 Watts RMS | 500 Watts MAX, Sensitivity: 97 dB, Frequency response: 150 Hz - 10,000 Hz, Impedance: Single 4-Ohm. CT Sounds Neo 6.5 inch single 4 ohm midrange loudspeaker.