Free Shipping on Orders over $50

Menu Close



Infinity Reference REF507F

Model #: REF507F

Call for Best Price

Additional Parts May Be Required:
Additional parts or labor may be required to complete the installation depending on year make and model

Available In Store Only


Professional Installation Required

Built to order, Usually Ships in 2-4 Weeks

Special Order
Usually Ships in 2-4 Weeks

Financing Options here.

Edit Content


Progressive Leasing

Lease to own through Progressive Leasing


Great selection of major brands to suit all needs and budgets. Find the best payment plan to fit into your life.


Make easy monthly payments over 3, 6, or 12 months.

Reference Series 5-1/4″ 2-way car 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 REF507F 5-1/4″ 2-way car speakers follow that Infinity heritage by offering the killer combo of high efficiency and superb sound.

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:

  • 5-1/4″ 2-way speakers (pair)
  • Plus One+ polypropylene woofer cone with hi-roll rubber surround
  • 1/2″ textile balanced-dome tweeter
  • 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 45 watts RMS (135 watts peak power)
  • frequency response: 67-21,000 Hz
  • sensitivity: 92 dB at 2.83V volts
  • top-mount depth: 1.885″
  • grilles not included
  • warranty: 1 year
  • 60-day returns

Additional information


Frequency response


Manufacturer warranty

You Might Also Like