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Rockford Fosgate Prime R1675-S

6-3/4" component speaker system

48 Reviews | 1 question - 5 answers

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Item # 575R1675S

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Our take on the Rockford Fosgate Prime R1675-S

Whether you're building your first system or replacing some burned-out factory speakers, Rockford Fosgate's Prime speakers offer clean, powerful performance that'll keep you and your friends rockin' as you drive. Plus, Prime speakers are a great way to get Rockford Fosgate sound quality without destroying your bank account.

Rockford Fosgate Prime R1675-S

Excellent factory replacement

Whether you're building your first system or replacing some burned-out factory speakers, Rockford Fosgate's Prime speakers offer clean, powerful performance that'll keep you and your friends rockin' as you drive. Plus, Prime speakers are a great way to get Rockford Fosgate sound quality without destroying your bank account.

Better components give you better detail

The Prime R1675-S component speaker system sports stiff mica-injected 6-3/4" polypropylene woofers that deliver strong drums and bass, along with clean reproduction of the midrange frequencies. The separate Mylar tweeters add the excitement of strong high-frequency response to your music without a trace of harshness. Built-in crossover networks divide the frequencies going to each driver, so all your music plays faithfully. Grilles are included.

Note: The oversized terminals on these speakers won't connect to a Crutchfield wiring harness. A free 10-pack of female quick slides that you can splice onto our harness will be included with your speaker purchase.

Installation note: You'll need a pair of our universal backstraps to install the tweeters in the factory locations.

Replaced factory speakers in a 2003 Toyota Corolla. Great component system for the price. I could not be more satisfied from the easy install to the fantastic sound that these speakers produce. Great highs from the tweeters and booming lows from the bass.

Carlos, Fairfield, CA

What's in the Box:

  • 2 Woofers
  • 2 Tweeters (each with attached 70" speaker wire terminated by quick-slide connectors)
  • 2 Woofer grilles
  • 2 Flush mounting tweeter housings (with tweeters installed)
  • 2 Angled surface mounting tweeter housings
  • 2 Flush-mount retaining clips
  • Two 12' lengths of speaker wire (with tinned bare wire on one end and quick-slide connectors on other)
  • Eight 1-1/4" Self-tapping screws
  • Four 5/8" Flat-head screws
  • 8 Speed-clips
  • Installation/Operation instructions (English/ French/ Spanish/ German/ Italian)

Product Highlights:

  • component speaker system includes 2 woofers, 2 tweeters, and 2 woofer grilles
  • 6-3/4" mica-injected polypropylene woofer cone with foam surround
  • 1/2" Mylar balanced dome tweeter
  • power range: 2-40 watts RMS (80 watts peak power)
  • frequency response: 55-20,000 Hz
  • sensitivity: 92 dB
  • top-mount depth: 2-3/16"
  • grilles included
  • warranty: 1 year
  • Our 60-day money-back guarantee

Rockford Fosgate Prime R1675-S Reviews

Average Customer Review(s):

(48 Reviews)
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Hands-on research

Features and Specs

Speaker Size 6 3/4
Design 2-way
Tweeter Design 1/2" Balanced Dome
Tweeter Composition Mylar
Woofer Composition Mica Injected Poly
Woofer Surround Foam
Parts Warranty 1 Year
Labor Warranty 1 Year
Sensitivity (1W at 1 meter) 89
Sensitivity at 2.83 volts 92
Frequency Response 55 - 20k Hz
Minimum RMS Wattage 2
Maximum RMS Wattage 40
Peak Power Handling (Watts) 80
Impedance (Ohms) 4
Top-mount Depth (Inches) 2 3/16
Bottom-mount Depth (Inches) 2 3/8
Cutout Diameter or Length (inches) 5 5/8

Product Research


Mica Injected Polypropylene Woofers: The woofer cones are mica injected polypropylene. This material is light weight and rigid for decreased distortion and improved bass response.

Tweeter: The 1/2" Mylar tweeters are a balanced dome design. A semi-dome tweeter has a dome placed inside a cone. Balanced dome tweeters are semi-dome tweeters with equal reproduction area given the cone and dome portions of the tweeter. Out of the box, the tweeters are mounted in the flush mount housings. An angled surface mount housing is also included, and the back of the the flush mount housing and the top of the angled surface mount housing are combined to make the (non-angled) surface mount housing. Once mounted, the tweeters swivel so you can direct them toward the listening positions.

Tweeter Dimensions:

  Frame Diameter Frame Width Frame Depth Cutout Diameter Mounting Height Mounting Depth
Flush Mount 2.125" N/A N/A 1.83" 0.34" 0.752"
Surface Mount 1.815" N/A N/A N/A 1.1" 0.66" (Screw Depth)
Angled Surface Mount N/A 1.815" 1.845" N/A 1.661" 0.59" (Screw Depth)

Crossovers: A 6 dB/octave high-pass crossover is integrated into the case of each tweeter. The woofers have two spades on each terminal; the wire from the tweeter, as well as the wire from the source are connected there.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.

Q & A

Customer Q&A

Crutchfield asked  
Why did you buy this?

Have a set already. Great product!!! [ Thomas  Jan 21, 2017 ]
Because its Rockford Fosgate [ Chris  Sep 12, 2016 ]
Value [ WAYNE  Jul 28, 2016 ]
i like the way fosgate speakers have performed for me in the past and thought these would work well for this new audio build [ George  Jul 11, 2016 ]
brand [ CARROLL  May 14, 2016 ]
What to try these. They have good reviews. [ Wendy  May 05, 2016 ]
based on the information given to me by the tech dept and customer reviews [ KEITH  Apr 04, 2016 ]
Had a great deal on them and need them to replace the factory cardboard speakers my Pontiac G6 has. [ Rosendo  Mar 28, 2016 ]
Good quality and great price [ Ryan  Mar 25, 2016 ]
Proper fitment for my vehicle [ Mark  Mar 22, 2016 ]
Reasonable price and specs appear to be efficient for stock headunit [ Ray  Feb 27, 2016 ]
Good Price Good Reviewes Bulit in crossovers they sound great on kenwood head unit [ Jon  Feb 05, 2016 ]
Top Sellers, Good Brand at a Great Price. [ GUILLIANO  Jan 18, 2016 ]
Needed replacement - good specs [ Joel  Dec 23, 2015 ]
They seem like they will work well for my needs after reading the specs and the user reviews. [ Jonathan  Dec 19, 2015 ]
Brand Name [ richard  Dec 16, 2015 ]

1 question already asked

Eh, ok, running from stock 80 watt deck they play but no bass not bad quality their alright [ RONALD  May 05, 2016 ]
There is a built in crossover on the speaker itself. I have a pair in the front doors and they sound awesome! Clear highs and low lows with great mid range too. [ Eric  May 05, 2016 ]
It uses a high pass filter in place of an actual crossover. In my vehicle, they sound fantastic at low and mid volumes. At high volumes they're too bright and tire my ears. I have the same head unit with some jbl's in my other vehicle and I can listen at high volume all day. The "low" end is very good and would be better with some more juice. I'm putting in 20w rms. [ Lee  May 04, 2016 ]
Frank, I bought these speakers long ago enough that I don't remember. The car I put them in is a 2014 Ford Focus, which already had woofers and tweeters (front doors only) in separate locations, so I assume there was already a crossover in the car. I can't be sure. I also don't remember buying a separate crossover. Lastly, I figured I would screw the whole deal up so I had them installed at a car stereo jawn. [ John  May 04, 2016 ]
They worked fine for me yeah. [ Brady w.  May 04, 2016 ]