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FLI Underground FU6C-F1

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

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FLI Underground FU6C-F1

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

$33.99

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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 Component System
  • Power Handling:
    • Peak: 420 watts per set / 210 watts each side
    • RMS: 140 watts per set / 70 watts each side
    • Minimum Input: 35 RMS per speaker
  • Electroplated injection molded polypropylene (IMPP) cone
  • Butyl rubber surround
  • 1" Silk Dome tweeter
  • Separate passive crossover for detailed filtering
  • Outstanding high frequency response
  • Includes a steel mesh grill
  • 4 ohms impedance
  • High temperature voice coil
  • Top-mount depth: 2-1/8"
  • Authorized Internet Dealer
  • 1-year Manufacturer's warranty

Priced Per Complete Component System: 2 midwoofers, 2 tweeters and 2 crossover networks.

Speaker Specifications

Series
This is the manufacturer product line of speakers.
Priced Per
Car Speakers are typically sold in pairs so you will receive 2 speakers for each speaker purchase on speakers marked "Priced Per Pair". If a speaker is marked "Priced Per Each" then the speaker is sold individually and each purchase you make will result in 1 speaker. High-powered tweeters, midrange and full-range pro audio for car speakers are typically sold per each speaker.
Speaker Size
Refers to the size of the speaker measured in inches. Every vehicle has standard application sizes. Please use our vehicle fitment guide for your vehicle's specific speaker sizes if you do not know them.
6-1/2"
Design
The number of individual drivers in a car speaker. Speakers with 2 drivers are known as a 2-way, and 3 drivers are known as a 3-way. Component systems are often referred to as "separates" because the tweeter is not attached to the midwoofer (main speaker driver) and mounts separately in a location such as a door post. Component systems typically come with an external crossover so you can easily adjust the high and low frequencies sent to both the midwoofer and the tweeter. Center channel speakers are great for those looking to have surround sound in their vehicle.
2-way Component System
Tweeter Design
Designs such as cone, dome, semi-dome, balanced dome, and whizzer are most popular. Cone tweeters are simple, efficient and typically are the most reasonably priced. Dome tweeters are used in most home speakers, and provide a smoother and more accurate sound. Semi-dome design is one with a dome placed inside a cone. A Balanced dome driver is a semi-dome with equal reproduction area given the cone and dome portions of the driver. A whizzer tweeter is a separate tweeter cone driven by the voice coil of the woofer.
Dome
Tweeter Size
Refers to the size of the tweeter. Typically, smaller tweeters produces less output with higher frequency response.
Tweeter Composition
Materials such as polypropylene, silk, cloth, and paper are the most common, where as many more recent tweeters are now manufactured with composites such as Aluminum, Titanium, Mylar, and other materials.

PEI is an acronym for "Polyetherimide" which is an amorphous, amber transparent, high-performance thermoplastic.

Silk
Woofer Composition
Lightweight woofer cone materials are essential for efficient operation. Poly cones produce exceptional sound and are sturdy against various changes in temperature. Paper cones are very efficient, and when treated for moisture resistance, will perform at a high level. Poly refers to polypropylene, which is thermoplastic or fibers that are polymers of propylene. IMPP refers to injection molded polypropylene, a commonly used process and material in speakers.
Injection Molded Polypropylene (IMPP)
Woofer Surround
A speakers surround is part of the suspension system. The surround protects the cone and prevents it from being displaced as it flexes out from the basket. It is usually made of a durable material like treated foam or rubber in order to withstand the strenuous job of producing bass frequencies.
Butyl Rubber
Peak Power Handling
Peak power handling refers to the amount of power a speaker can handle during a brief musical burst. The RMS power range figure is a much more reliable rating for determining the speaker's power requirements. The Peak power handling specification is typically rated per speaker unless otherwise noted.
210 watts
RMS Power Handling
The RMS power is the amount of power the speaker requires to operate safely and properly. RMS Power Handling refers to the amount of power a speaker can handle on a continuous basis. We recommend powering your speakers or subwoofer with 80%-120% of its recommended RMS rating. The RMS power handling specification is typically rated per speaker unless otherwise noted.
70 watts
Sensitivity
An efficiency or sensitivity rating tells you how effectively a speaker converts power into sound. The higher the number, the more efficient the speaker and the louder it will play with the same input power. An efficient speaker helps you maximize your available power. Most sensitivity ratings measure the speaker's output with 1 watt of input, 1 meter from the speaker. Some speakers' sensitivity is measured with 2.83 volts of input, instead of 1 watt.
 
Efficiency (1w/1m) is not an accurate indicator of a subwoofer's output capability and should not be used as a comparison to other speakers or subwoofers to determine which one is "louder".
85 dB
Frequency Response
The range of frequencies the speaker will reproduce (lowest frequency to the highest). Bigger is better, meaning the wider the range, the better. The optimal range is 20 - 20,000 Hz (which is the range of human hearing).
65 - 20,000 Hz
Impedance (Per Voice Coil)
The load value (in ohms) that the speakers present to the amplifier per voice coil - the amount of resistance to the current flow. This is a key specification as subs wired in parallel or low impedances can create problems with your amplifier and potentially void all warranties. We encourage you to ask our support department prior to purchase if you do not understand which impedance level will suit your application best.
4 ohms
Shallow Mount Installation
This means that the subwoofer/speaker is designed to be installed in areas that do not have a lot of space. Shallow mount subwoofers are typically found under a seat or behind the seat in some trucks.

Shallow mount speakers will typically have a mounting depth of 2" or less, while shallow mount subwoofers will typically have a mounting depth of 3" or less.

No
Top-Mount Depth
The depth when installed on top of the mounting surface. Measured from the bottom of the speaker's magnet to the bottom of the mounting holes on the rim of the speaker.
2-1/8"
Bottom-Mount Depth
The depth when installed from the bottom of the mounting surface. Measured from the bottom of the speaker's magnet to the top of the mounting holes on the rim of the speaker.
2-1/4"
Cutout Dimensions
Refers to the dimensions of the hole, measured in inches, required to contain the speaker.
Cutout Dimensions
Refers to the dimensions of the hole, measured in inches or millimeters, required to contain the speaker.
5-5/8" x 5-5/8" 
Hi-Res Audio Compatible
This feature refers to if the product is capable of Hi-Res Audio (HRA) playback.
Speaker Grilles
A grating or screen of metal or plastic bars or wires, mounted in front of a speaker as protection. If yes, the speakers will include matching speaker grilles. If no, there are no grilles included.
Yes
Number of Speakers
This is the number of speaker that is included in the package. Each purchase will result in receiving the number of speakers indicated here. Please note that some items will have multiple woofers in the same enclosure. For sets of component speakers, this number will refer to the number of sets of speakers (For example, 2 would indicate the purchase includes 2 woofers and 2 tweeters).

Please refer to the product image and description for further details about the speaker.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Manufacturer

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
50%
4 Star
0%
3 Star
50%
2 Star
0%
1 Star
0%

Average Attribution Rating

Durability
2.8
Value
4.3
Features
3.5
Design
5.0
Usability
4.3
bigdog

sierra vista,az

Overall
Durability
Value
Features
Design
Usability
fli underground fu6c

January 29, 2012

Great sounding speakers but they do need an amp to make them sound good.

6 of 7 found this helpful

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El Abuelo

Dallas, TX

Overall
Durability
Value
Features
Design
Usability
Can you say loud.

October 30, 2011

I got these because of the price. Never did I think they would be louder than heck. They are amped up with a 4 channel kenwood. They just scream. I don't appreciate though how I think I burnt one woofer. But they make a good replacement.

6 of 7 found this helpful

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The-Dude

Fargo, ND

Overall
Durability
Value
Features
Design
Usability
Must be amplified...

November 24, 2011

Hooked these up as a direct replacement to blown stock speakers, and I almost think the blown stock speakers sounded better. I'm thinking these need to be amplified to sound good cause they would distort and sound like butt coming straight off the HU. So I don't recommend getting them unless they're going to be amplified. Needless to say, i'm disappointed. Not amplified, the stock speakers went louder without distortion than these.

5 of 6 found this helpful

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Jared

Springfield, MO

Overall
Durability
Value
Features
Design
Usability
Not as tough as stated

April 2, 2012

I ran these on a jensen power 760.4 that is rated at 75w per channel. The speakers only lasted about 3 hours playtime before beginning to squeek and squak.

4 of 6 found this helpful

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Product Summary

Manufacturer

Model Number

FU6C-F1

UPC

086429226160

Weight

4.74lbs

Internal SKU

fu6cf1

Internal Product ID

32699

Sonic Electronix Wiring Guide

Wiring Diagram Legend

Warning: The image depicted shows the resistance change when wiring multiple subwoofer terminals. Please refer to your subwoofer's owner's manual for the proper wiring of its terminals. Sonic Electronix, Inc. is not responsible for damage caused to your audio system or vehicle due to improper installation. Please call tech support at 1-877-289-7664 if you require additional assistance.

Product Name: FLI Underground FU6C-F1