These have upgraded features over the older XR4x6 speakers. these have a better sensitivity rating, meaning they will sound louder than the older ones, because they are more sensitive to the amplifier that is powering it. (The amp which is built into your receiver, or an external amp). These also have an improved frequency response so that they can have a more theater-like sound.
The Xplore XR-4x6 4x6" 300 watt set of 3 way trixial car speakers are extremely high powered. The built-in tweeters, will give you rich highs, while the built-in woofer and mid-range drivers will provide all the mids and lows.
These Xplore speakers deliver incredible surround sound with the 3 way speaker design. the frequency response on these are amazing.

Features:

300 watts max output
3-way trixial speakers
frequency response: 70 hz - 20 khz
sensitivity: 90 dB / W
Mounting depth: 44 mm (1.73")
Impedance: 4 Ohms
Size: 4x6" inches
20 MM Voice coils
30 MM PEI Dome Tweeter
15 MM Piezo Tweeter
Injection Cone
Metra 72-1002 Speaker Harness Connector for 1984-02 Jeep+Dodge+Cherokee Vehicles
Chrysler 2-pin flat speaker connector
One kit needed per pair of speakers
Compatible with the following vehicles:
Jeep - 1988-1996 Cherokee, 1986-1992 Comanche, 1986-1992 Grand Wagoneer, 1984-1996 Wrangler.
Dodge - 1994-2002 Ram Pickup

• 300 watts max output . 3-way trixial speakers . frequency response: 70 hz - 20 khz . sensitivity: 90 dB / W . Mounting depth: 44 mm (1.73") . Impedance: 4 Ohms . Size: 4x6" inches.
• 20 MM Voice coils. 30 MM PEI Dome Tweeter. 15 MM Piezo Tweeter. Injection Cone. Metra 72-1002 Speaker Harness Connector for 1984-02 Jeep+Dodge+Cherokee Vehicles.
• Chrysler 2-pin flat speaker connector. One kit needed per pair of speakers.
• Compatible with the following vehicles: Jeep - 1988-1996 Cherokee, 1986-1992 Comanche, 1986-1992 Grand Wagoneer, 1984-1996 Wrangler.
• Dodge - 1994-2002 Ram Pickup .  

300 watts max output . 3-way trixial speakers . frequency response: 70 hz - 20 khz . sensitivity: 90 dB / W . Mounting depth: 44 mm (1.73") . Impedance: 4 Ohms . Size: 4x6" inches.Xplore