Infinity Reference REF307F 3.5" Coaxial Speakers

A modern classic

Just as they were throughout my 16 years as a Crutchfield Advisor, Infinity's Reference Series speakers remain a popular choice for upgrading from factory speakers. The REF307F 3-1/2" 2-way car speakers follow that Infinity heritage by offering the killer combo of high efficiency and superb sound.

Designed to work behind factory grilles, these Infinity speakers can liven up your music.

Infinity's famous ingredients

Reference Series speakers deliver powerful sound every mile you drive, thanks to oversized polypropylene woofer cones with durable hi-roll rubber surrounds. The cones move more air than other speakers of similar size, adding plenty of punch to the speaker's impressive performance. The 1/2" textile balanced-dome tweeters deliver clear and smooth highs, for a sound that's definitively Infinity.

Excellent power-handling

These speakers will blossom when powered by an external amplifier, but they're also sensitive enough to be a good match for a factory or aftermarket stereo. Plus, Infinity has come up with a safe way to get a little more power out of your system — these 3-ohm speakers work in combination with the speaker wire in your car so your car stereo sees a true 4-ohm impedance.

Grilles are not included; the factory grilles should be suitable for most applications.

Product highlights:

• 3-1/2" 2-way speakers (pair)
• Plus One+ polypropylene woofer cone with hi-roll rubber surround
• 1/2" textile balanced-dome tweeter
• in-line high-pass filters included (196 Hz at 6 dB per octave)
• True Four Ohm Impedance technology
  • speaker's 3-ohm impedance combines with speaker wire impedance for a 4-ohm load
  • compatible with virtually all factory or aftermarket car stereos
• handles up to 25 watts RMS (75 watts peak power)
• frequency response: 85-21,000 Hz
• sensitivity: 91 dB at 2.83V
• top-mount depth: 1.418"
• grilles not included
• warranty: 1 year

What's in the box: