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Rockford Fosgate T1675-S Power Series 6-3/4" component speaker system

Rockford Fosgate

Item # 575T1675S

Rockford Fosgate builds their Power line of speakers for the true car audio enthusiast.

Find what Fits your vehicle

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Front

1/13

Back

2/13

Only at Crutchfield

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Only at Crutchfield. No pressure. And no commissions! Our experts help you get what you need and will never upsell you. No sweat. We do the research, so you get the best info, the best instruction, and the best tech support. All for free. No regret. With 60-day price protection and returns, you can feel good about your purchase – or send it back. Legendary Service. Since 1974.

Tweeter

Woofer with grille

Rockford Fosgate T1675-S Front
Rockford Fosgate T1675-S Back
Rockford Fosgate T1675-S Only at Crutchfield
Rockford Fosgate T1675-S Other
Rockford Fosgate T1675-S Other
Rockford Fosgate T1675-S Other
Rockford Fosgate T1675-S Other
Rockford Fosgate T1675-S Other
Rockford Fosgate T1675-S Other
Rockford Fosgate T1675-S Other
Rockford Fosgate T1675-S Other
Rockford Fosgate T1675-S Tweeter
Rockford Fosgate T1675-S Woofer with grille

Rockford Fosgate builds their Power line of speakers for the true car audio enthusiast.

Special offer: Save 15% on an Allstate Protection Plan
6-months special financing with a Synchrony HOME credit card

Item # 575T1675S

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  • Free lifetime tech support
  • 60-day price-drop protection
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$359.99
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About the Rockford Fosgate T1675-S

John Pollard

by Crutchfield's John Pollard

Product highlights:

  • component speaker system includes two 6-3/4" woofers, two tweeters, and two external crossovers
  • carbon fiber and polypropylene woofer
  • butyl rubber surround
  • 1" treated fabric dome tweeter
  • 2-way external crossover with 3-way tweeter adjustment
  • includes adapter brackets for 5"x7", 6"x8", or 6"x9" openings (brackets require modification)
  • Vertical Attach Surround Technique (VAST™) increases cone area
  • 4-ohm impedance
  • power range: 10-100 watts RMS (200 watts peak power)
  • frequency response: 55-22,000 Hz
  • sensitivity: 92 dB
  • woofer mounting depth: 2-1/2"
  • grilles included
  • warranty: 1 year
  • MFR # T1675-S
  • Item # 575T1675S

What's in the box:

Rockford Fosgate T1675-S owner's manual

If you need assistance accessing this owner's manual, please give us a call.
  • Two 6-3/4" Woofers
  • 2 Woofer grilles
  • Two 1" Tweeters (with attached 6" speaker wire terminated with female quick-slide connectors)
  • 2 Crossovers
  • 2 Front flush mount tweeter brackets
  • 2 Rear flush mount tweeter brackets
  • 2 Surface mount tweeter housings
  • 4 Tweeter trim rings
  • Two 6x9/5x7 Adapter brackets
  • Two M4x25mm Machine screws
  • Two M4x10mm Machine screws
  • Two M4x15mm Stud bolts
  • Eight 1-1/4" Allen head screws
  • 3mm Allen head bit
  • 8 Speed clips
  • Installation/Operation Instructions (English/ French/ Spanish/ German/ Italian)

Featured review

Excellent replacement for the Bose speakers in my Hyundai Santa Cruz. These speakers weigh 2 pounds 15 ounces each. The Bose 1 pound. Almost 3 times as heavy, all of it magnet. Louder and cleaner. Hyundai and Bose should be embarrassed since that was their "premium" system.

Steven from Los Gatos, CA

5 out of 5 stars

See all 80 reviews

More details on the Rockford Fosgate T1675-S

Pat M.
Researched by Crutchfield's Pat M.

Features & specs

General
Speaker Size 6 3/4
Driver Design 2-way
Woofer Design Cone
Woofer Material Carbon Fiber filled IMPP
Woofer Surround Butyl Rubber
Midrange Design ---
Midrange Material ---
Tweeter Design 1" Dome
Tweeter Material Treated Cloth
Super Tweeter Design ---
Super Tweeter Material ---
Impedance (Ohms) 4
Weather-resistant No
Grilles Included Black, Metal mesh, Plastic frame
Parts Warranty 1 Year
Labor Warranty 1 Year
Specifications
Sensitivity (1W at 1 meter) 89
Sensitivity at 2.83 volts 92
Frequency Response 55 - 22k Hz
Maximum RMS Wattage 100
Peak Power Handling (Watts) 200
Top-mount Depth (Inches) 2 1/2
Bottom-mount Depth (Inches) N/A
Cutout Diameter or Length (inches) 5 5/8
Mounting Height (Inches) 0.428
Frame Width 6.785
Frame Length 6.785

Product Research

Features

Injection-Molded Woofers: The woofer cones are injection-molded carbon fiber filled polypropylene. This molding process assures a uniform cone thickness for superior linearity and clarity. It is also light weight and rigid for decreased distortion and improved bass response.

Butyl Rubber Surrounds: The butyl rubber surrounds dampen unwanted harmonic distortion while maintaining linear geometry under extreme weather conditions. This leads to less distortion, superior frequency response, and superior durability.

VAST Surround: The Vertical Attach Surround Technique (VAST) increases a speaker's effective radiating cone area without increasing the size of the basket.

FlexFit: The Flex Fit frame utilizes slots (where possible) instead of single screw sized holes; allowing slight adjustment of the speaker when mounted.

StampCast Basket: The T1675-S features StampCast steel baskets for added rigidity.

Multi-OEM Adapter: For mounting flexibility, the included brackets can be modified to fit 5x7, 6x8, or 6x9 applications.

Note: The bracket is generic (cutout sized for a 5-1/4) and requires modification before the T1675-S will fit into it.

Mounting: The 1" treated cloth dome tweeters have multiple mounting configurations; choose flush or surface mount. The surface mount housing can be positioned at two angles, approximately 10° or 30° angle. Depending on the mount used, the installed dimensions are:

  Flush Surface 10° Surface 30°
Mounting Height 0.40" 1.060" 1.25"
Mounting Depth 0.912" Screw Depth Screw Depth
Frame Diameter 2.357" N/A N/A
Cutout Diameter 1.75" N/A N/A
Frame Width N/A 2.130" 2.130"
Frame Depth N/A 2.157" 2.153"

Tweeter Level: A switch on the side of each crossover allows you to adjust the output level of the tweeters to -2 dB, 0 dB, or +2 dB.

Tweeter Axis: Another switch on each crossover adjusts the tweeter output for on axis or off axis placement.

Bi-amp: The crossovers have discrete inputs for the woofer and tweeter, along with a bi-amp on/off switch, so each component can be powered by an individual amplifier channel.

Wiring: The crossover inputs and outputs are set screw clamps; they will accept bare wire up to 12-gauge.

Crossover Dimensions:

  • Width: 4-5/8"
  • Height: 1-3/8"
  • Depth: 4-5/8"

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Customer Q&A

21 questions already asked

Q
Are there specs available for the individual components of this system? Like what are the frequency filters on the crossovers? And what are the frequency ranges and sensitivities of the individual speakers?
jacob  Jun 14, 2023
1 answer
A
The included crossovers are set at 3k Hz for both woofer and tweeter. The included tweeter in this system is the T1T-S, which has a rated 3k - 22k Hz. A frequency response range is not available for the woofer independently, but we know that the lowest rated frequency is 55 Hz. Similarly, sensitivity for the woofer is not measured independently, but the tweeter sensitivity is 90 dB.
zachary  Jun 14, 2023 (Staff)
Q
which rear deck speakers match with this set?
joe  Apr 11, 2023
1 answer
A
Greetings joe, and thank you for your question. We do vehicle specific research to see what can fit, and if not, what it might take to get them to fit. We would need your vehicle year, make and model to see what would be a good fitting match. Please contact one of our advisors at 800-324-9695 for assistance.
thomas  Apr 11, 2023 (Staff)
Q
what 4 channel amp would be good to pair with this?
nicholas  Feb 02, 2023
2 answers
A
I have 2 pair running on the Rockford Fosgate T600-4 MONSTROUS
chris  Apr 29, 2023
A
4-channel amps that provide up to 100-watts RMS can be used here with the fantastic Rockford Fosgate T1675-S component speakers, Nicholas. The Kicker 46CXA360.4T 4-channel amp in the first link below delivers 65x4 and is a great performer. If you wanted more power, you could also use the Rockford Fosgate Power T400x4 amp in the second link, this would pump you up to 4x100-watts. https://www.crutchfield.com/p_20646CX36T/Kicker-46CXA360-4T.html https://www.crutchfield.com/p_575T400X4A/Rockford-Fosgate-Power-T400X4ad.html
bo  Feb 02, 2023 (Staff)
Q
I see input (tweeter/woofer) and output (tweeter/woofer). I have 2 wires coming from my amp...where do the 2 wires from my amp go into if there are 4 openings? I know tweeter goes to tweeter and woofer goes to woofer output. I'm lost...lol!!!
sean  Oct 10, 2022
1 answer
A
According to the owner's manual (copy can be downloaded using the link found in the What's in the Box section of this webpage), you must make sure the bi-amp switch is set off and use the tweeter input to run both the tweeter and woofer from one amp channel. If you purchased the gear from us, you can contact our technical support for help ensuring you get this properly set up.
jason  Oct 11, 2022 (Staff)
Q
Iâ??m a complete idiot. A novice at best. All I know is what I like. Clear, clean sound, not overwhelming bass. Natural. Is this right for me?
jeffrey  Aug 28, 2022
1 answer
A
If these physically fit in your ride Jeffrey I think they are a great choice! These Rockford Fosgate T1675-S components are truly impressive. They do have a treated fabric tweeter that will be smooth on cymbals and hi hats playback, and I would consider these a very natural sounding speaker. These also work well on radio power or an amplifier, so they give you a ton of options for down the road too! I think they are a solid call!
bo  Aug 28, 2022 (Staff)
Q
Where would the amps be installed on a 2022 Silverado 1500 Custom model? I'm also trying to find out if these will fit since I don't even see "2022" in the drop-down list. What size speakers do I have with a non-Bose system?
jude l  Apr 23, 2022
1 answer
A
For additional details on fit or installation please contact an Advisor by phone (1-800-324-9695) or online chat. They will be able to pull up your vehicle and give you the details on if this will fit and what you will need for an installation in your vehicle.
kenneth  Apr 25, 2022 (Staff)
Q
Installing in a 2020 Subaru Outback.Crossover came with this system, but is it needed for install with stock stereo? Assuming not, since stock unit/amp would have crossovers already, but anybody know for sure?
randall  Jun 23, 2021
1 answer
A
We have not received any answers from other customers on your question. I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They should be able to help answer your question.
thomas  Jun 25, 2021 (Staff)
Q
Planning on getting these for my Sony XAV-AX1000. Will this HU have adequate power for these?
steven  Apr 19, 2021
1 answer
A
Plenty power
leopoldo  Apr 19, 2021
Q
What speaker wire gauge do i need? Will 18GA speed wire work running from amp 75RMS per channel?
timofey  Apr 06, 2021
1 answer
A
18 gauge is too small for just about any length that is needed to install a setup like this one. Typically, 16 or 14 gauge wire is used. I recommend contacting an advisor by calling 1-800-324-9695 to get help selecting the right gauge for your installation plans.
jason  May 08, 2021 (Staff)
Q
What is the cutout diameter and overall diameter of the tweeter including the mounting/trim ring?
ethan t  Feb 23, 2021
Q
How many combined ohms from one channel are both the tweeter and woofer? Does the crossover run series or parallel?
simplykt  Jan 21, 2021
1 answer
A
The set when connected to the crossover equal a 4 ohm final load
jeffrey  Jan 21, 2021
Q
do you have to bi amp or can a single input be used?
roger  Oct 30, 2020
3 answers
A
You do not have to use 2 amplifiers, you can choose single or double amplifier
matt  Nov 30, 2020
A
They come with active cross overs and only require 1 input signal to feed both drivers from the cross over.
benny  Nov 30, 2020
A
No need to Bi Amp. I ran these as stock replacement in my Tundra (non JBL).
armand r  Nov 30, 2020
Q
I just received the speakers without any speaker wires. Has anyone had the same issue? I think I was sent an open box with missing parts.
sunny  Jul 03, 2020
4 answers
A
If I'm not wrong I believe that it doesn't come with speaker wire from what I remember
lorenzo  Jul 04, 2020
A
Unless you ordered speaker wire as part of your order, then it does not come with. I have found it extremely helpful to call. The reps are very good at making sure you have everything you need. Additionally, they can build your order and then you just need to review and place it. As far as the product, those speakers were fantastic.
brit  Jul 03, 2020
A
Coming from somone who has purchased many sets of rockford component speakers they never come with wire
matthew harold  Jul 03, 2020
A
you have to provide your own speaker wire there was two leads off of each Tweeter. The door speakers just half the male pieces
chris  Jul 03, 2020
Q
Do these have to be connected to an Amp? Or can they go straight from the receiver?
miguel  Jul 03, 2020
2 answers
A
The can be run from your receiver and sound just fine. But running then to an amp will make them come alive. Theyll sound great either way though.
brian  Jul 03, 2020
A
I have them connected to Rockford Fosgate amp's but I don't see why they wouldn't sound good being connected to the aftermarket receiver like the Kenwood receiver I installed in my vehicle. Hope this helps I'm not a professional installer but crutchfield has some flaws instructions.
dyrike  Jul 03, 2020
Q
What's the largest speaker for the doors of a 2020 Subaru Sti?
william  May 23, 2020
1 answer
A
My speakers went into Dodge Ram 1500 2017
fred  May 23, 2020
Q
Is there any way to modify these speakers to fit in my lower front doors of my 2005 Impala?
brad w.  Oct 17, 2019
2 answers
A
Hi Brad, thank you for your question! It is best that you speak with an Advisor via online chat, or by phone at 1-800-324-9695 for further assistance with your question on fitment. This will ensure that we have the proper vehicle information pulled up. Looks like there are several different options regarding the factory gear, that we would need to confirm that you did or didn't have before we could check out the true fitment information on these. Any of our amazing team of skilled Advisors will be happy to help you out!
jessica  Oct 24, 2019 (Staff)
A
If I'm not mistaken, you shouldn't need any modifications. At the most, you may need an adapter, but they are cheap and sometimes included with purchase on Crutchfield.
gary  Oct 17, 2019
Q
can these be ran active?
ethan  Apr 27, 2019
2 answers
A
Yes
jason  Apr 27, 2019
A
Technically, any speaker system can be run in an active speaker system. If you are asking whether these come with an internal amplifier, the answer is no. If you are asking whether you can run this speaker system off of your existing stereos internal amplifier, it depends on the power of said amplifier. I would not use this speaker system with any less than 20 W RMS.
gary  Apr 27, 2019
Q
Are tweeters surface mount?
james  Mar 31, 2019
2 answers
A
Yes. If you dont have a stock location for them they can be surface mounted and come with all the brackets needed.
tony  Mar 31, 2019
A
They can be surface mounted or hidden behind factory tweeter locations in vehicle . We used our in the factory location in a 2013 Toyota Tacoma front door .
jason a  Mar 31, 2019
Q
The only reason im looking to replace the aftermarket 6x9 3 ways i currently have in my front doors is to get more bass, will these do the job?
timothy  Jun 03, 2018
2 answers
A
They sound great but will definitely not do the job of a subwoofer
taylor  Jun 03, 2018
A
Not necessarily. These woofers are smaller than your 6x9s, so they physically can't produce more bass unless you add more power. However, door speakers rarely produce good bass without sealing the door panels. I recommend dynamating your doors and going from there. Without sealing the doors, you'll likely get better sound, with tighter bass, but not much in the way of air movement.
gary  Jun 03, 2018
Q
What size of a Rockford fosgate power series amp do i need to push the T1675-s component speakers for the front doors and the T1682 speakers for the back?
jason  Apr 28, 2016
1 answer
A
Thanks for your question. For information on selecting the best amp I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences between the amp models and help you make the best choice for your system.
kristina  Apr 29, 2016 (Staff)
Q
How do these RF comps compare to the Polk MM6501?
luke  Oct 13, 2015
1 answer
A
Thanks for your question. For information on comparing two or more models I would recommend reaching out to an Advisor by phone (1-800-324-9695) or online chat. They will be able to help determine the differences and help you make the best choice for your system and your budget.
kristina  Oct 14, 2015 (Staff)
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