all factory or after market car stereos Power Handling: (RMS) 60 watts Power Handling: (Peak) 180 watts Sensitivity: (2.83V @ 1m) 93dB Frequency Response: 53Hz - 21kHz Impedance: 2 ohms Mounting Depth: 2-1/16" (52mm) SPECIFICATIONS Speaker/Subwoofer Size : 6.25" Design : 2-Way Coaxial Speakers Power Handling (RMS) : 60 Watts Power Handling (MAX) : 180 Watts Power Handling (Combined) MAX : 360 Watts Sensitivity : 93 dB Frequency Response : 53Hz - 21kHz Impedance : 4-Ohms Mounting Depth : 2-1/16" (52mm) Approximate Weight : 6.50 LBS  (less)

for accuracy and detail that may surprise you. Infinity Reference Series loudspeakers continue to be the top-selling premium speakers in the world. For instance, the 6-1/2-inch Reference coaxial model has been the number-one-selling car audio multielement speaker for five years straight. With proprietary features such as patent-pending Plus One cones, true 4-ohm topology, UniPivot edge-driven tweeters and the industry-leading Intermount III and I-Mount mounting systems, as well as the Starfish tweeter-mounting adapter, Reference Series speakers leave the competition scrambling to keep up.  (less)

drop in to the factory location of a 5 1/4-inch speaker and can be driven by either a factory OEM radio or an aftermarket radio. It utilizes Plus One technology which gives you improved bass response. The Edge-driven textile-dome tweeter provides outstanding high frequencies and excellent reliability. This speaker can be driven with a 2 ohm impedance amplifier which gives you improved low frequency performance and louder sound. They can also be driven by a 4 ohm radio or amplifier. Infinity Systems is a leader in loudspeaker design for both car and home speaker systems and is part of Harman International. These speakers come with a one year parts and labor warranty.  (less)

for accuracy and detail that may surprise you. Infinity Reference Series loudspeakers continue to be the top-selling premium speakers in the world. For instance, the 6-1/2-inch Reference coaxial model has been the number-one-selling car audio multielement speaker for five years straight. With proprietary features such as patent-pending Plus One cones, true 4-ohm topology, UniPivot edge-driven tweeters and the industry-leading Intermount III and I-Mount mounting systems, as well as the Starfish tweeter-mounting adapter, Reference Series speakers leave the competition scrambling to keep up.  (less)

for accuracy and detail that may surprise you. Infinity Reference Series loudspeakers continue to be the top-selling premium speakers in the world. For instance, the 6-1/2-inch Reference coaxial model has been the number-one-selling car audio multielement speaker for five years straight. With proprietary features such as patent-pending Plus One cones, true 4-ohm topology, UniPivot edge-driven tweeters and the industry-leading Intermount III and I-Mount mounting systems, as well as the Starfish tweeter-mounting adapter, Reference Series speakers leave the competition scrambling to keep up.  (less)

for accuracy and detail that may surprise you. Infinity Reference Series loudspeakers continue to be the top-selling premium speakers in the world. For instance, the 6-1/2-inch Reference coaxial model has been the number-one-selling car audio multielement speaker for five years straight. With proprietary features such as patent-pending Plus One cones, true 4-ohm topology, UniPivot edge-driven tweeters and the industry-leading Intermount III and I-Mount mounting systems, as well as the Starfish tweeter-mounting adapter, Reference Series speakers leave the competition scrambling to keep up.  (less)

will drop in to the factory location of a 6 1/2-inch speaker and can be driven by either a factory OEM radio or an aftermarket radio. It utilizes Plus One technology which gives you improved bass response. The Edge-driven textile-dome tweeter provides outstanding high frequencies and excellent reliability. This speaker can be driven with a 2 ohm impedance amplifier which gives you improved low frequency performance and louder sound. They can also be driven by a 4 ohm radio or amplifier. Infinity Systems is a leader in loudspeaker design for both car and home speaker systems and is part of Harman International. These speakers come with a one year parts and labor warranty.  (less)

in to the factory location of a 6-inchx8-inch/5-inchx7 speaker and can be driven by either a factory OEM radio or an aftermarket radio. It utilizes Plus One technology which gives you improved bass response. The Edge-driven textile-dome tweeter provides outstanding high frequencies and excellent reliability. This speaker can be driven with a 2 ohm impedance amplifier which gives you improved low frequency performance and louder sound. They can also be driven by a 4 ohm radio or amplifier. Infinity Systems is a leader in loudspeaker design for both car and home speaker systems and is part of Harman International. These speakers come with a one year parts and labor warranty.  (less)

for accuracy and detail that may surprise you. Infinity Reference Series loudspeakers continue to be the top-selling premium speakers in the world. For instance, the 6-1/2-inch Reference coaxial model has been the number-one-selling car audio multielement speaker for five years straight. With proprietary features such as patent-pending Plus One cones, true 4-ohm topology, UniPivot edge-driven tweeters and the industry-leading Intermount III and I-Mount mounting systems, as well as the Starfish tweeter-mounting adapter, Reference Series speakers leave the competition scrambling to keep up.  (less)