Garage
Shop

See all parts that fit your 1992 S4

FLI Underground FU6-F1A

6-1/2" 2-Way FU Series Coaxial Car Speakers

FLI Audio
Shop all FLI Audio
Product videos
highlight-star-icon

6.5" FLI Undergound Car Speakers • 150W Max • 50W RMS • Electroplated Injection Molded Polypropylene (IMPP) Cone • Butyl Rubber Surround • 4 ohm Impedance • Includes a Mesh Grille

Learn more about the fu6f1a

We apologize

This item has been discontinued


Loading...
UTE-73BT main

Alpine UTE-73BT

Single DIN Digital Media Receiver with Bluetooth

44
-16.69%

$149.95

List price $180.00

CV15BT main

Cerwin-Vega CV15BT

Single Din Digital Media Receiver with Bluetooth

3
MVH-S322BT main

Pioneer MVH-S322BT

Single DIN Digital Media Receiver with Bluetooth and Amazon Alexa

7
-13.34%

$129.99

List price $150.00

KMM-X705 main

Kenwood eXcelon KMM-X705

Single DIN Digital Media Receiver with Bluetooth, Built-in Alexa (Sirius XM Ready)

6
-20.40%

$199.00

List price $250.00

XRM59BT main

Dual XRM59BT

Single DIN Digital Media Receiver with Bluetooth, USB and Aux

28
CAR1013 main

Jensen CAR1013

10.1" Single DIN Floating Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay and Android Auto

8
BE12ACP.WXC main

Boss Elite BE12ACP.WXC

12" Single DIN Floating Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, Android Auto, Backup Camera (SiriusXM and iDataLink Maestro Ready)

Limited time!
KDC-X305 main

Kenwood eXcelon KDC-X305

Single DIN CD Receiver with Bluetooth and Built-in Alexa (Sirius XM Ready)

28
-29.17%

$170.00

List price $240.00

Limited time!
XAV-AX8500 main

Sony XAV-AX8500

10.1" Single DIN Floating Touchscreen Digital Multimedia Receiver with Bluetooth, Wireless Apple CarPlay, and Wired Android Auto (SiriusXM Ready)

2
-10.00%

$899.99

List price $999.99

DEH-S7200BHS main

Pioneer DEH-S7200BHS

Single DIN CD Receiver with Bluetooth, HD Radio and SiriusXM Ready

2
-10.72%

$249.99

List price $280.00

Product Highlights


6.5" FLI Undergound Car Speakers • 150W Max • 50W RMS • Electroplated Injection Molded Polypropylene (IMPP) Cone • Butyl Rubber Surround • 4 ohm Impedance • Includes a Mesh Grille

Description


FLI Audio brand icon

Authorized dealer

FLI Underground Performance
Getting the most bang for your buck has never been easier. The new FLI Underground line of speakers offers great full range sound for an affordable price. These entry level speakers are a excellent choice for factory replacement speakers, as well as speakers that are powered directly off an aftermarket audio receiver. They feature a electroplated injection molded polypropylene (IMPP) cone that delivers fast and articulate bass. The PEI tweeter and midrange combine to produce outstanding high frequency response. The butyl rubber surround delivers an improved lower frequency. All of these things join together to create a full range sound that is comparable to speakers two to three times the price. For those looking to a cost effective way to get some higher end audio, the FLI Underground speakers are the ideal solution.

  • 6-1/2" Fli Underground Series 2-Way Car Speakers
  • Power Handling:
    • Peak: 300 watts per pair / 150 watts each
    • RMS: 100 watts per pair / 50 watts each
    • Minimum Input: 25 RMS per speaker
  • Electroplated injection molded polypropylene (IMPP) cone
  • Butyl rubber surround
  • 1/2" PEI Dome tweeter
  • Outstanding high frequency response
  • Includes a steel mesh grill
  • 4 ohm impedance
  • High temperature voice coil
  • Top-mount depth: 2-1/8"
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Priced Per Pair


Best selling similar products

46CSC654 small

Kicker CSC65 (46CSC654)

• 300 watts Peak Each, 100 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

(254)

$79.96

List price $119.99

Club 622 small

JBL Club 622

• 180 watts Peak Each, 60 watts RMS Each
• Silk Edge Driven Dome tweeters with 0dB or -3dB adjustable output levels
• UV-Resistant Polypropylene cone material with Plus One woofer cone architecture
• Impedance: 3 ohm
• Sensitivity: 93 dB

(5)

$109.95

List price $139.95

DB652 small

Polk Audio DB652 (DB 652)

• 300 watts Peak Each, 100 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

(214)

$109.00

List price $119.99

43DSC6504 small

Kicker DSC650 (43DSC6504)

• 240 watts Peak Each, 60 watts RMS Each
• 1/2" PEI (Polyetherimide) Balanced Dome zero-protrusion tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 90 dB

(72)

$84.99

List price $94.99

NSP65 small

NVX NSP65

• 270 watts Peak Each, 90 watts RMS Each
• 3/4" Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 89 dB
• Mounting Depth: 2.40"

(93)

$69.99

List price $107.99

XED62 small

Cerwin-Vega XED62

• 300 watts Peak Each, 35 watts RMS Each
• 3/4" Piezo Metal Balanced Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 94 dB

(15)

$49.99

List price $59.99

REF6532IXAM small

Infinity Reference REF6532IXAM

• 180 watts Peak Each, 60 watts RMS Each
• Textile Edge Driven Dome tweeters
• Polypropylene cone material
• Impedance: 3 ohm
• Sensitivity: 93 dB

(22)

$119.95

List price $149.95

SXE-1726S small

Alpine SXE-1726S

• 220 watts Peak Each, 40 watts RMS Each
• 1" Carbon Graphite Dome tweeters
• Nano Fiber cone material
• Impedance: 4 ohm
• Sensitivity: 92 dB

(13)

$42.99

List price $54.99

R165X3 small

Rockford Fosgate Prime R165X3

• 90 watts Peak Each, 45 watts RMS Each
• 1/2" Piezo pole-mounted Silk Dome tweeters
• Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 91 dB

(206)

$79.99

List price $79.99

P1650 small

Rockford Fosgate Punch P1 P1650

• 110 watts Peak Each, 55 watts RMS Each
• 3/4" PEI (Polyetherimide) Dome tweeters
• Mineral-Filled Polypropylene cone material
• Impedance: 4 ohm
• Sensitivity: 88 dB

(84)

$109.99

List price $109.99

Specifications & Details


Speaker Specifications
Speaker Size
6-1/2"
Design
2-way Coaxial
Tweeter Design
Dome
Tweeter Composition
PEI (Polyetherimide)
Woofer Composition
Injection Molded Polypropylene
Woofer Surround
Butyl Rubber
Peak Power Handling
150 watts
RMS Power Handling
50 watts
Sensitivity
85 dB
Frequency Response
65 - 20,000 Hz
Impedance (Per Voice Coil)
4 ohm
Shallow Mount Installation
No
Top-Mount Depth (Mounting Depth)
2-1/8"
Bottom-Mount Depth
2-1/4"
Cutout Dimensions
5-5/8" x 5-5/8" 
General specifications
Speaker Grilles
Yes
Warranty and Return Policy
Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Item Details


Manufacturer:

Model Number:

FU6-F1A

Weight:

3.75lbs

Internal SKU:

fu6f1a

Internal Product ID:

32696

Product and How-to Videos


  • How To Test Speaker Polarity | Tips & Demo | Car Audio 101
  • Replace your Car Speakers and Upgrade to Better Sound | Sonic Electronix

Customer Ratings & Reviews


FLI Underground FU6-F1A thumbnail image

5 star
100%
4 star
0%
3 star
0%
2 star
0%
1 star
0%



Durability
4
Value
5
Features
5
Design
5
Usability
5

Customer Reviews

Sort by:

Loading...

Ok speakers

They do good with the flu audio comps. But they are ok. Not loud but not too quite. I have them with a clarion EQ and they do well.

By El Abuelo on October 30, 2011

11 found this helpful




03-07-gmc-savanafv-fdspkg small

NVX Front N-Series Speaker Upgrade Kit for 2003-2007 GMC Savana Full Size Van

Pair of 6.5" NVX N-Series Speaker Upgrade Kit with Metra Speaker Adapters and Harnesses | Fits select 2003-2007 Savana

(121)

$82.99

List price $143.97

Related Searches


Save up to 10 different vehicles in your garage
Vehicle
Store
Delete

1992 Audi S4

1988 Dodge Aries

1992 Mitsubishi Eclipse

2025 Audi S4

1995 Chevrolet Astro

1988 Nissan Maxima

1982 GMC Jimmy

2018 Chevrolet Camaro

2001 BMW 325Ci

1996 GMC C1500

Vehicle
Store
Delete

2007 Harley Davidson FXST Softail Standard

2012 Harley Davidson FLHTC Electra Glide Classic

1999 BMW K1100LT

Vehicle
Store
Delete

2013 Can-Am Commander DPS 800R

2025 Can-Am Defender MAX DPS HD7

2022 Can-Am Defender MAX HD9 DPS

Add vehicle Clear all vehicles
Where to find vehicle info
Are you sure you want to clear your garage?
This action cannot be undone. Confirm
This page was not designed for products.
If you continue, you will be redirected to a category customized for your vehicle. Continue
Loading...
Identify your vehicle and submodel details
  • Owner's manual
  • Vehicle's insurance card
  • Vehicle registration
  • Vehicle produced after 2005: Inside driver's side door
  • Vehicle produced before 2005: Rear passenger doorjamb, glove box, center console, or engine compartment
Car Info Side Door Icon
Vehicle Registration Icon
Vehicle Insurance Icon

Modern vehicles often require specific brackets, wiring harnesses, and mounting solutions. A fit guide ensures:

  • You see only parts engineered for your exact vehicle
  • You avoid incompatible radios, speakers, or wiring
  • Installation is smoother, faster, and frustration-free
  • You get the correct accessories the first time

Whether you're replacing a factory stereo or upgrading your entire audio system, the Fit Finder eliminates uncertainty.