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Focal ISU 690

Universal Integration Series 6"x9" component speaker system

Item # 091ISU690

You're ready: to do away with unbearable factory sound and to gain a totally authentic experience listening to...

Read more from Crutchfield writer, Alexander H.

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$279.99

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About the Focal ISU 690

Upgrade in style

You're ready: to do away with unbearable factory sound and to gain a totally authentic experience listening to music in the car. With Focal's Universal Integration Series speakers installed in your car, a new era has begun — one in which it's easy to enjoy every moment of your drive. Focal provides such a dramatic boost in sound quality by applying much of the same technology in these car speakers that they use in their studio and audiophile-grade home systems.

Upgrade in style

You're ready: to do away with unbearable factory sound and to gain a totally authentic experience listening to music in the car. With Focal's Universal Integration Series speakers installed in your car, a new era has begun — one in which it's easy to enjoy every moment of your drive. Focal provides such a dramatic boost in sound quality by applying much of the same technology in these car speakers that they use in their studio and audiophile-grade home systems.

Superior materials and design

Focal's ISU 690 component speaker system employs a polyglass 6"x9" woofer cone to give you a warm, natural sound with enhanced strength for accurate playback with no added resonances. An aluminum/magnesium inverted dome tweeter, backed by an in-line crossover, delivers astonishing detail in the high range and integrates an acoustic horn design for an improved soundstage across your dash. Focal also gives you two mounting options for a smoother installation. 

High sensitivity design

Planning to drive these speakers off a head unit? No problem. They're designed to take advantage of every bit of power supplied to give you the best audio quality possible. However, Focal's famous sound soars when powered by an aftermarket amp!

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

Grilles are not included; the factory grilles should be suitable for most applications.

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Product highlights:

  • component speaker system includes two woofers and two tweeters with inline crossovers
  • 6"x9" polyglass woofer with butyl rubber surround
  • aluminum/magnesium inverted dome tweeter with acoustic horn design
  • tweeter installation accessories included
  • 4-ohm impedance
  • handles up to 80 watts RMS power range (160 watts peak)
  • frequency response: 55-21,000 Hz
  • sensitivity: 93.6 dB
  • woofer top-mount depth: 3-5/16"
  • grilles not included
  • warranty: 1 year
  • Our 60-day money-back guarantee
  • MFR # FOCAL ISU690
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What's in the box:

  • Two woofers
  • Two inverted dome tweeters (each with 5" length of speaker wire attached)
  • 2 Bottom mount woofer adapters
  • 2 Flush mount tweeter housings (with tweeters installed)
  • 2 Angled surface mount tweeter housings
  • Two 18" Lengths of speaker wire with in-line tweeter crossovers
  • Two 7" Lengths of speaker wire with in-line woofer crossovers
  • 2 Woofer mounting gaskets
  • 8 Speed clips
  • Four 1" Flathead screws
  • Eight 1" Pan head screws
  • User manual (English/ French/ German/ Italian/ Spanish/ Portuguese/ Dutch/ Russian/ Polish/ Arabic)
  • Focal window sticker

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More details on the Focal ISU 690

Features & specs

General
Speaker Size 6X9
Design 2-way
Tweeter Design Inverted Dome
Impedance (Ohms) 4
Tweeter Composition Alumnium/Magnesium
Woofer Composition Polyglass
Woofer Surround Butyl Rubber
Parts Warranty 1 Year
Labor Warranty 1 Year
Specifications
Sensitivity (1W at 1 meter) N/A
Sensitivity at 2.83 volts 93.6
Frequency Response 55 - 21k Hz
Minimum RMS Wattage ---
Maximum RMS Wattage 80
Peak Power Handling (Watts) 160
Top-mount Depth (Inches) 3 5/16
Bottom-mount Depth (Inches) 3 3/4
Cutout Diameter or Length (inches) 0

Product Research

Woofer
Tweeter

Woofer

Polyglass Cone: The woofer cone has a cellulose pulp base and is coated with a uniform deposit of hollow glass microballs. The addition of the Polyglass layer significantly increases the cone's rigidity without adding much weight. This combination takes advantage of the accuracy and neutrality of the hard outer surface, but maintains the superior damping characteristics of the cellulose pulp.

Surround: The butyl rubber surround is resistant to ultraviolet rays, temperature extremes, and humidity to add to the speaker's reliability and longevity.

Woofer Crossovers: The included 7" woofer wires have integrated crossovers. The woofer ends of the wires have female quick-slides that easily connect to the woofer terminals.

Tweeter

Inverted Dome Tweeter: The tweeter is an inverted aluminum and magnesium dome, producing a broad sound stage. The tweeter has a Neodymium magnet to provide a powerful magnetic field for the voice coil, while still maintaining the tweeter's compact dimensions.

Note: When flush mounted, the tweeters are pressure fit into the opening, with nothing holding them from behind, so the cutout diameter is very important.

Mounting Options: The tweeters include flush mount and angled surface mount housings:

  Flush Mount Angled Surface Mount
Mounting Height 0.312" 2.105"
Mounting Depth 0.658" 0.875" (screw depth)
Frame Diameter 1.957" N/A
Cutout Diameter 1.74" N/A
Width N/A 1.968"
Surface Depth N/A 3.114"

Tweeter Crossovers: The included 18" tweeter wires have integrated crossovers. The tweeter ends of the wires have quick-slide terminals that easily connect to the wires soldered to the tweeters. The input end of each wire has three leads, a negative and two positives. The positive leads are labeled Car and Display, with a lower output level from the Car lead (useful because the placement of the woofer in a typical car installation requires the tweeter output be lowered to maintain a balanced sound).

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Customer Q&A

Q
Crutchfield asked: Why did you buy this?
A
Fits vehicle, inline crossovers which means I don't have to cut the factory harnesses [ R  Nov 26, 2018 ]

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