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Clifford Matrix 50.5X (p/n 5301X)

Responder SST 2-way LCD Pager Car Alarm with 1-Mile Range


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This item has been discontinued

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Clifford Matrix 50.7X (p/n 5702X)

OUR PRICE: $209.99

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Clifford Matrix 50.5X (p/n 5301X)

Responder SST 2-way LCD Pager Car Alarm with 1-Mile Range


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The new 1-mile range Matrix 50.5X Responder SST System from Clifford is the most advanced 2-Way Security and Remote Start system in the world! The new Matrix 50.5X employs Spread Spectrum Technology, digital frequency hopping and multiple frequency transmission to assure that even if a frequency is blocked, the signal still will go through. The Responder SST also has dual error correction systems to combat signal data corruption and minimize any signal interference. The end result is an amazing range of up to one full mile!

The interactive display on the Responder 2-way remote confirms all commands (almost instantly) with simple to comprehend icons and text. The remote alerts users to security system triggers by beeping or vibrating when out of audible range of the siren. The Matrix 50.5X will also start your vehicle with the push of a button (when remote start is installed), and you'll get confirmation back that the vehicle has been started.

Key Features:

  • Flagship 2-Way Security System / Remote Start System with Responder SST Technology
  • 6 channel remote start/security/keyless entry system
  • Confirms commands and system triggers on the transceiver LCD screen
  • Clone-Safe® Code-Hopping®
  • Parking Light Flash
  • Failsafe® Starter Kill
  • Anti-Grind
  • Stinger® DoubleGuard® Shock Sensor
  • Revenger® Six-Tone Siren
  • Bright Blue LED Status Indicator
  • Miniature XCRS (Extreme Capacity Relay Satellite)
  • Defroster Output
  • Built-in Turbo Timer
  • Dome Light Supervision
  • Comfort Closure
  • 4 Auxiliary Outputs
  • Horn Honk
  • Includes One 2-way Responder SST Transceiver Remote
  • Matrix 50.5X
  • Part #: 5301X
  • 1-year warranty

Also found as: matrix-505X

Product History:

Clifford MATRIX-50.7X thumbnail
(newest, current model)
Clifford MATRIX-50.5X thumbnail
(previous model, replaced by Clifford Matrix 50.7X (p/n 5702X))
Clifford RSX3.5 thumbnail
(previous model, replaced by Clifford Matrix 50.5X (p/n 5301X))

General Features

Security System Type
This indicates whether the product is a security car alarm product, remote start module, or a combo unit that offers security with remote start features.

Security: This means that the car alarm system is just that. No bells and whistles, just a car alarm system.

Remote Start: when installed, this allows the user to start a vehicle from a remote location. Remote start modules and security with remote start alarms often require an additional vehicle specific bypass module to complete installation.

Security with Remote Start: This means that the system incorporates both features listed above.

Car Alarm
If "Yes", the system will have alarm security features to help prevent vehicle theft and tampering. Remote start modules without alarm features will have "No" for this value.
Remote Start
If the alarm or remote start module has "Yes" for this value then the system has an electronic device that allows you to start your vehicle by remote control without actually being inside the vehicle or using the key. The remote start system supplies the vehicle with power and simulates a start just as if you were inside using the key. Select vehicles require additional accessories or immobilizer/bypass modules to use the remote start feature.
Keyless Entry
Keyless entry allows you to remotely lock, unlock, and open the trunk of a vehicle if that is equipped with power door lock motors (actuators) and power truck motor (solenoid). Door lock controls via the remote are found on nearly all of today's car alarms.
2-way Paging
Alarms with 2-way paging inform the user via remote vibrating/audible/visual alert when the alarm is triggered. The pager must be within range to receive the transmitted signal.
Number of Remotes
The number of remotes included with the alarm system purchase.
Number of Buttons on Primary Remote
The amount of buttons on the Primary Remote generally equals the number of functions that you can use your remote for. Some remotes have auxiliary buttons which can perform more than one task per button.
Main Transmitter Type
LCD and OLED transmitters display various screen savers, warnings, alerts and other features on the face of the remote, rather than first generation button-only transmitters. They provide more information typically and other features.
Sidekick Remote Transmitter Type
Some car alarms and remote start systems come with more than 1 transmitter, which is referred to as the "sidekick" transmitter. Most LCD/OLED systems come with a button-only sidekick transmitter, while select units come with an additional LCD/OLED transmitter.
LED/Display Color
The color of the LED indicator(s) on various items such as button-only car alarm transmitters, various chargers, cell phone accessories and other products.

For OLED or LCD car alarm remotes/transmitters the display color refers to the color(s) of the screen.
Number of Vehicles Supported
Some higher end car alarm systems can support multiple vehicles. This is the number of vehicles that the works with.
Number of Auxiliary Outputs
The number of auxilary outputs that the car alarm system supports. These outputs are left over from the total number of channels. They can be used to add on other options or additional features to a vehicle.
PC Programmable
Custom, advanced programming options through one or more of the following: PC, Pocket PC, PALM Pilot, Valet SW or Remote Transmitter allows for advanced controls of your alarm's functions.
Smartphone Compatibility
These are the types of smartphone systems that the car alarm system is compatible with.
GPS Tracking
These car alarms enable a user to track the position of the vehicle using GPS satellites.
Professional Installation Recommended
This will indicate whether or not we recommend going to a professional installer for this item. Some items have complex installations that should only be done be professional certified installers.
Built-in Bypass Module
System Type
This refers to the type of remote start system, whether it is an add-on or a complete kit.

Convenient Features

Panic Mode
Panic mode allow the user to be able to set off the alarm from the remote.
Trunk Release
The trunk release option allows for integration and control of the trunk latch. Additional parts may be required.

Alarm Features

Paging Range
The maximum distance that the car alarm system will work with the wireless remotes.
1 Mile
Number of Car Alarm Channels
The total number of channels that the car alarm system supports. These channels can include locking and unlocking doors, opening the trunk, remote start, and many other options.
Most car alarms come with a siren that can be installed. The siren will sound when the car alarm is triggered the alarm goes off.
Shock Sensor
The shock sensor is designed to trigger an alarm on light or heavy impacts and vibrations (standard sensor included with most alarms).

A dual zone shock sensor is a feature of proximity and shock sensors only. Zone 1 ( light impact on shock sensor and short motions(adjustable) on proximity sensor) will trigger warn away chirp to warn intruder that car has an alarm without setting off the full alarm. Zone 2 (heavy impact on shock sensor and extended motions(adjustable) on proximity sensor) will trigger the alarm to “go off”.

Dual Zone Shock Sensor

Two-Way Paging Features

Transmitter Alert
The is the way that the transmitter, or remote can communicate alerts to the user.
Interior Thermometer
Some of the higher end car alarm systems are able to detect the temperature of the cabin. The temperature can then be displayed on the remote.

Remote Start Features

Cold Start Timer
Great for those on a set schedule who need their vehicle to warm up at a specific time every morning for example.
Turbo Timer
Some remote start systems have turbo timer feature which allows the vehicle to run for a specified amount of time after exiting vehicle. In turbocharged vehicles this prevents hot oil in the engine from choking up in the lines. Hard driving can raise engine oil temperatures to dangerously high levels. Proper cool down is essential for a healthy turbo and engine.
Compatible with Diesel Engines
This means that the remote start system will work with diesel engines.
Engine Start Intervals
Some remote start systems offer feature to protect your engine. The engine start interval feature will start the car at particular time intervals or when the engine has reached a certain temperature. This feature prevents the engine block from freezing.
Compatible with Manual Transmissions
This means that the remote start car alarm is compatible with manual transmissions. Please see the item description, manual, or your professional installer for more information as to how this feature will work with your specific vehicle.

Specials with this Item

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Warranty and Return Policy

Parts Warranty Duration
1 year
Labor Warranty Duration
1 year
Warranty Provider
Sonic Electronix

Summary of Customer Ratings & Reviews

Rating Distribution

5 Star
4 Star
3 Star
2 Star
1 Star

Average Attribution Rating



Clifford Matrix 50.5X

January 14, 2009

Excellent Product, but only one remote supplied, additional remote is expensive. Battery for remote is easy to find (type AAA) and usually lasts about a month with moderate usage.

Installation is a real PAIN so I would recommend a very good friend who is an automotive electrician or be ready to shell out a fair amount of dough for a professional.... But trust me, you can damage your car if you don't know EXACTLY what you are doing when you install.

6 of 7 found this helpful

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Ashland, AL

Clifford Matrix 50.5x rocks

July 10, 2008

I was going to get the viper 5900 but it was back ordered so I ordered this alarm instead. Im sure glad the viper was back ordered :)

This is the same alarm system as the 5900 except it comes with a cool carbon fiber covered remote and the viper has a cheesy blue remote. Otherwise they are identical. The alarm works great. Includes a shock sensor for when people mess with your ride and the install was very easy. I haven't tried long range testing with it but I was able to receive signals from my truck from anywhere inside walmart while shopping which surprised me since the cellphone doesn't work inside there much.

Excellent alarm, thanks again sonic electronix for a wonderful shopping experience!!!

6 of 7 found this helpful

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Phoenix, AZ

best out there

September 24, 2008

If you are looking for a straight forward no-nonsense remote auto start, then this is the one for you. while it is not feature rich with a lot of bells and whistles, it is VERY reliable. If properly installed you will never have any problems with this unit. the range on the remote is about 1000 feet in the areas i use it in. I was expecting more. but then there are few time I am more than that away from my car. And most likely it is an antenna location issue and not a unit or remote issue. The price on this unit is unreal too.

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Sonic Electronix Wiring Guide

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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: Clifford Matrix 50.5X (p/n 5301X)