The DS 6-¾-Inch Coaxial Speakers are a perfect upgrade for great sound in your car doors. Using zero protrusion PEI tweeters ensures you get every bit of clarity you need, without interfering with factory grilles.Paired with a DX amplifier, the sound becomes more powerful, realistic, and louder. These DS speakers work best with 60 watts of recommended power. 6-¾ DS Series 2-Way Car Speakers. Frequency Response: 40-20,000 Hz. DSC6704, 43DSC6704, 43 DSC6704, DSC670. A signature may be required at our discretion. AK/HI/PR and other US Protectorates. We do not mark merchandise values below value or mark items as "gifts" - US and International government regulations prohibit such behavior.