Contact us
Close contact box
Connect ID #
368 317 031 3

Call center hours

Connect ID #
368 317 031 3
All finished with your chat session?

We’ll email you a transcript of this conversation for your records.

We're sorry, chat is not available at this time. Please visit our Support page to find the help you need.

Please enter your name.  
Please enter a valid email address. Why is this required?
Please enter your US phone number.  

For Tech Support, call 1-800-955-9091

Thank you, !
Our conversation will be emailed to
Please enter a question  
Please select an email topic.  

Looking for tech support?
Please call us at 1-800-955-9091

Need help now?
Call an advisor: 1-888-955-6000

Please enter your name.  
Please enter your US phone number.  
Please enter an email.  
Please enter an email.  
Please enter a message  

Calls may be recorded for training and quality control purposes.

Crutchfield call centers are located in Virginia USA.

Don't wait on hold. We'll call you back when it's your turn to talk with the next available .
Please enter your name  
Please enter your phone number  
Please enter a message  

Calls may be recorded for training and quality control purposes.

Crutchfield call centers are located in Virginia USA.

Cobra SPX 7800BT

Smartphone-compatible radar detector

Item # 079SPX78BT

Cobra's SPX 7800BT radar detector won't lead you blindly into risky situations.

Cobra's SPX 7800BT radar detector won't lead you blindly into risky situations.

Need help?
Contact our Virginia-based experts.
Discontinued item
3 questions - 15 answers

Item # 079SPX78BT

Need help?
Contact our Virginia-based experts.

About the Cobra SPX 7800BT

Exceptional performance by itself

Cobra's SPX 7800BT radar detector won't lead you blindly into risky situations. You can count on its incredible range and super-fast circuitry to deliver up-to-the-second alerts for all incoming threats. You'll get 15-band protection against radar, laser, and other potential issues, including nearby safety alerts and emergency vehicles with strobe lights activated. The detector's chassis might be small, but you'll have a generous 1.25" color OLED screen showing you what's ahead so you can react with confidence.

Exceptional performance by itself

Cobra's SPX 7800BT radar detector won't lead you blindly into risky situations. You can count on its incredible range and super-fast circuitry to deliver up-to-the-second alerts for all incoming threats. You'll get 15-band protection against radar, laser, and other potential issues, including nearby safety alerts and emergency vehicles with strobe lights activated. The detector's chassis might be small, but you'll have a generous 1.25" color OLED screen showing you what's ahead so you can react with confidence.

The audio signals will come in loud and clear through the detector's built-in speaker, and you'll hear escalating alerts as you approach the source of the signal. You can adjust sensitivity for city or highway travel to reduce false alarms.

Add your smartphone for extra assurance

Built-in Bluetooth® wireless connectivity allows the SPX 7800BT to communicate with your iPhone® or Android™ phone. Just download the free Cobra iRadar app from Google Play or the iTunes® App Store — the detector links to the app through your smartphone's Bluetooth. You can then view all alerts and functions on your smartphone's display or on the detector's color screen, including signal strength, settings adjustment, and alert history. You'll also have warnings for verified speed and red-light camera enforcement locations across the United States, courtesy of Cobra's AURA camera database. The app offers a speedometer and compass to help you keep track of your velocity and bearings when connected to the detector.

Note: In-app purchases may be required to take advantage of some of the free iRadar app's offerings, including the AURA camera database. 

Tap into the Cobra iRadar Community

Millions of other drivers are using the iRadar app on their smartphone as they travel, so why not use their information to help yourself? iRadar users can tag detected radar signals or enforcement areas on their own phones, and those locations are uploaded to Cobra's central server. Your app then can incorporate those tagged locations into its own maps and give you a heads-up when you're approaching them.

Leave your smartphone in your pocket

You can view all the great features of the iRadar app on the SPX 7800BT's color OLED screen, so you won't have to worry about mounting your phone in a convenient location before you hit the road. You can customize color themes and take advantage of the detector's dim mode to save your eyes when driving at night.

Invisible to most radar detector detectors

The SPX 7800BT offers complete immunity to VG-2 and Spectre I radar detector detection devices, warning you when they're in proximity. You can follow the digital strength signal meter to learn how close you are to the signal's source, and what kind of threat you're facing.

More benefits of the Cobra iRadar app

You can have the app remember where you parked your car so you can find it after you've spent time at a big shopping mall, amusement park, or sporting event. And select A/V receivers from JVC will allow you to see the display of the iRadar app on the receiver's screen when the receiver's in "App Link Mode."

Sorry, but we cannot ship radar detectors to Virginia or the District of Columbia.


Product highlights:

  • radar detector with Bluetooth connectivity
  • suction-cup mount windshield bracket kit and hook-and-loop fastener
  • straight power cord
  • 1.25" color OLED graphic display and headphone jack
  • detects 7 radar bands, 6 laser bands, 2 safety bands (including strobe alerts)
  • voice and audio tone alerts for radar, laser, and POP
  • 4 city modes
  • 360° laser protection
  • VG-2 and Spectre I immunity and alerts
  • Spectre IV+ alerts
  • display includes signal strength meter
  • dim/dark and auto-mute modes
  • IntelliMute suppresses audible alerts based on engine RPM
  • car battery low-voltage warning
  • Cobra iRadar app
    • available free through Google Play or iTunes App Store (in-app purchase required for some features)
    • connects to SPX 7800BT detector via Bluetooth
    • provides warnings for speed and red-light cameras through Cobra's AURA database
    • car finder
    • speedometer and compass

What's in the box:

  • Radar detector
  • Windshield mounting bracket with two suction cups
  • 69" Straight power cord with cigarette lighter adapter and USB charging port
  • Self-adhesive hook-and-loop pad
  • Operating Instructions
  • Product registration card

Customer reviews

Loading reviews...

Cobra SPX 7800BT reviews

Average review:

13 reviews

Thanks for submitting your review

Filter by rating

Customer photos

Sort reviews

Sort by:
Items per page:
View page:

Verified customer (What's this?)
Verified employee purchase (What's this?)



Crutchfield response

<< >>

More details on the Cobra SPX 7800BT

Mark G.

Features & specs

X Band Radar Yes
K Band Radar Yes
KA Photo Radar Yes
KA Wideband Radar Yes
Laser Yes
Pulse Warning Yes
VG-2 Protection Yes
Display & Alerts
Dimmer Yes
Dark Mode Yes
Visual Alerts OLED
Audible Alerts Tone+Vox
Mute Yes
Earphone Jack No
Visor Clip No
Straight Cord Yes
Coiled Cord No
Case Included No
Battery Powered No
Parts Warranty 1 Year
Labor Warranty 1 Year

Product Research


Overview: The Cobra SPX 7800BT is a high-performance radar/laser detector in an ultra compact design. With built-in Bluetooth and the free Cobra iRadar app, you can share threats from your protector, and receive location information for speed/red light/camera and speed traps. Equipped with the latest technology and military-grade components, the SPX 7800BT's powerful CPU can sweep the entire police radar band spectrum in less than 240 milliseconds, providing extended range and warning time over previous models. The SPX Series gives you the best detection range in its class against all current radar/laser speed enforcement guns used today, including Instant-on and POP mode radar.

15-Band Radar/Laser Detection: The SPX 7800BT detects 15 bands of radar and laser, including the Safety Alert System:

  • Radar:
    • X band
    • K band
    • Ka band
    • Ku band
  • Laser (360° detection):
    • LTI 20-20
    • LTI Laser
    • Kustom Signals Laser 340
    • Kustom Signals Laser
    • Stalker LIDAR
    • Laser Atlanta Speedlaser/Kustom Signals-ProLaser II
  • Safety Systems:
    • Safety Alert System
    • Strobe Alert System
  • Radar Detector Detectors:
    • VG-2
    • Spectre I
    • Spectre IV+

Organic LED Display: The SPX 7800BT is equipped with a 1.25" full color Organic LED display with bright graphics and clear text. You can adjust the intensity of the display using the top mounted "Dim" button. The detector has a Bright display mode for daytime driving, a Dim mode for dusk driving, and Dark mode where no visual alerts will be displayed. The detector also includes a Color Theme feature that allows you to customize the display screen color scheme to match your vehicle's dash illumination. You can choose from Red, Blue, Orange, White, Green, or Multi-Color.

Cobra iRadar App: Cobra iRadar is a large community-based radar/laser/camera detection system. When linked to the Cobra iRadar detector via Bluetooth Smart, users can share and receive alerts in real time from other iRadar users. The Cobra iRadar app is compatible with iPhone 4S and later, and requires iOS 6.0 or later. It is also compatible with Android smartphones running Android OS 2.3.3 or higher. Cobra iRadar provides the following features:

  • Provides alerts from and access to AURA, Cobra's exclusive and 100% verified camera and driving hazard database of red-light cameras, known speed traps, and dangerous intersections.
  • Displays live radar and laser alert information from all iRadar users.
  • Allows you to submit and receive locations of live police, red light cameras, speed cameras, and caution areas from other members of the iRadar community.
  • View alert history on the radar map view.
Note: Subscription charges are required within the iRadar app for access to the Cobra iRadar Center ($4.99/month, $13.99/quarterly, or $49.99/annually) and AURA Live ($2.99/month, $7.99/quarterly, or $29.99/annually).

Pairing: Once the Cobra iRadar App is downloaded to your smartphone and the unit powered on, the iRadar unit will appear in your phone's Bluetooth settings menu. The detector's LED will flash blue during pairing and will turn solid blue when pairing is completed.

Compass: The SPX 7800Bt features an 8-point GPS Compass to give you an accurate direction heading when connected to your iOS/Android smartphone via the Cobra iRadar App.

Instant On/Pop Mode Alert: The Pop Mode Radar Gun is a single-pulse Doppler radar that is a feature of a K and Ka (Bee III radar gun) band Instant-On radar gun. It uses a single, short-time pulse to measure the target vehicle's speed. The SPX 7800BT can sense Pop radar signals beyond the effective range of Pop radar guns, and will alert you with two beeps and two flashes of the "P" indicator. During the alert, the unit will continue to detect other signals.

Safety/Strobe Alert: The Cobra SPX 7800BT will give you advanced alert of the presence and/or approach of emergency vehicles, trains, and road hazards from systems equipped with Safety Alert Traffic Warning System transmitters. The unit also has a Strobe Alert detector that can pick up the special strobes mounted on the light bars of many emergency vehicles to change traffic signals as the vehicle approaches.

Visual Alerts: The text display includes the type of signals detected and a numeric as well as vertical bar indication of the signal strength from one bar (weakest) to five bars (strongest).

Voice or Tone Alerts: The unit will sound alerts and confirm user settings with an audible alert. You can choose either Voice or Tone alerts. In Voice Alert mode, you will first hear several tones, then a voice announcing the type of signal detected, followed by more tones.  In Tone Alert mode, only the tones will be heard. A distinctly different tone is used for each type of signal detected, and with radar bands, the tones will repeat faster as you approach the signal source.

LaserEye: The SPX 7800BT's LaserEye provides you with 360° degree detection of laser signals. When mounting the unit, you must make sure the LaserEye has a clear view to the front and rear of the vehicle.

IntelliShield: The unit has Quad-level IntelliShield false signal rejection to reduce uncertainty and frustration from multiple false alerts. When in Highway mode, the unit provides full immediate response to all signals detected. This mode should be used when driving on the interstate and major highways. When driving in more urban environments, you can select one of the City Filtering Modes (City X, City X+K, City Plus X+K+Ka, and City Max) to minimize false alerts from automatic door openers operating in the X and K-band frequencies.

VG-2/Spectre I/IV+ Protection: The SPX 7800BT will alert you when VG-2, Spectre I and IV+ radar detector detection (RDD) is in use near your vehicle. The unit is undetectable by VG-2 and Spectre I devices, but can be spotted by Spectre IV+ RDDs. During an alert, the unit continues to detect other signals. You can choose whether or not you want the unit to show VG-2 and Spectre I and IV+ alerts and whether or not to sound audible alerts.

Auto/Manual Muting: When Auto Mute is On, the unit automatically reduces the audio volume of all alerts after they have sounded for four seconds. The signals will remain muted for as long as the signal is detected. When manually muting, you must press the Mute button while a signal is being received. This will reduce the volume of the alert in progress. The volume will return to normal for the next signal.

IntelliMute: IntelliMute allows you to avoid alerts you don't need to hear because you are either stopped or moving slowly. By sensing the RPMs of the engine, IntelliMute knows that you are driving at a low speed and automatically mutes all alerts (except for strobe signals from emergency vehicles). You must first set an activation point for your engine's RPMs, and when the revs go below that point, IntelliMute begins muting. Once set, the activation point is stored in memory.

IntelliMute Pro: IntelliMute Pro prevents detection by radar detector detectors (RDDs), such as VG-2, Spectre I and Spectre IV+, when traveling at slower speeds. When IntelliMute Pro is on, and engine RPMs are below the IntelliMute Pro's activation point, the detector's radar detection circuits are turned off to prevent detection by RDDs. In addition, no alerts will be given at RPMs below the activation point.

Mounting: You will get optimum performance from the detector if you mount it at a point approximately in the center of the vehicle, as low as possible on the front windshield without obstructing the view of the road to the front or rear. The detector can be mounted in two ways:

  • Dashboard Mount: Using the supplied hook-and-loop pad, you can attach the detector to the dashboard.
  • Windshield Mount: The supplied windshield mount adheres the detector to the windshield with two suction cups. The angle can be adjusted for best visibility.

Loading accessories...

Customer Q&A

Crutchfield asked: Why did you buy this?
The smart phone app connection and voice alerts [ Fred  Jul 31, 2016 ]
Have a older Cobra but the Free shipping & the Discount , to Good to pass up. Thanks Tommy B. [ E  Apr 30, 2016 ]
Needed it [ B  Feb 15, 2016 ]
Price/value, features [ shana  Dec 10, 2015 ]

3 questions already asked

Does The Cobra SPX 7800BT works with iPhone 6 Plus?
[ Dee  Jun 06, 2016 ]
4 answers
Yes. That is what I use and it works great.
[ Robert  Jun 11, 2016 ]
Yes works great with my 6 plus
[ Chlo  Jun 06, 2016 ]
Yes I have iPhone 6 works great! Definitely worth every penny!! Synced with the app it's accuracy can't be beat
[ THOMAS  Jun 06, 2016 ]
[ Mathew  Jun 06, 2016 ]
Does this radar detector provide the current speed limit on screen?
[ bin74  Nov 11, 2015 ]
7 answers
No. Only the current speed of the car if connected via Bluetooth with your phone....
[ Lucian  Nov 13, 2015 ]
No it just displays detector info and your car battery volts which I like and overall I love it
[ Richard  Nov 12, 2015 ]
It does if you have the app on with location turned on and your phone connected to the radar through Bluetooth. If the app is not connected to the radar it only shows your battery voltage and functions as a basic radar.
[ Mario  Nov 12, 2015 ]
No, it displays your current speed on screen. You can, however, set a speed maximum on the app that will alert you whenever you go above it
[ SARA  Nov 12, 2015 ]
No. It only registers YOUR current speed.
[ Ric  Nov 12, 2015 ]
When it's Bluetooth with your smartphone.
[ James  Nov 12, 2015 ]
Yes and accurate
[ MIKE  Nov 12, 2015 ]
When using this detector and the android app with a Bluetooth capable smart phone can I expect the audio alerts to be heard thru my car Bluetooth capable radio/speaker system when my phone is 'paired' with the on-board Bluetooth radio?
[ Rich  Jan 07, 2014 ]
4 answers
Radar jammers are illegal under FCC rules as it a radio wave. The Cobra does not use this technology. You may be confusing it with Laser jammers which use IF light from LED arrays to jammer the laser gun. Those are legal in 40 states and not regulated by the FCC. Cobra uses no jammer technology at all.
[ mikem  Nov 24, 2014 ]
Understanding that "jammers" are illegal, does this unit use this technology?
[ MissBliss  May 04, 2014 ]
Hi Rich, The alarms will not delivered through the vehicles speaker system after it is paired with your phone. The alarms are still coming from the detector. Hope this helps. Franz
[ FRANZ  Jan 08, 2014 ]
I am using detector with iOS.My iPhone is paired with car and it cannot be heard thru car.The speaker on the unit is pretty loud and works great.The App is great also.I love this unit. It was a great buy.
[ James  Jan 08, 2014 ]

Loading articles...