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John Hone Demo of MB Quart PWH 302 with Hifonics XXV Cyclops

The unbelievable power of MB Quart Subwoofers with a Hifonics competition amplifier.

Maxxsonics Power!

Ever wondered what kind of damage you could do with MB Quart sound quality car subwoofers and a Hifonics car amplifier from Maxxsonics?

Check out this killer video of John Hone pulling off the gloves with 16 MB Quart PWH 302 subs and a Hifonix XXV Cyclops amp. 

Soundstream Car Audio Coupon Savings

Soundstream Car Audio Coupon Savings
Soundstream has been the leader in mobile audio engineering and performance for the past 20 years. The vision has remained constant throughout this period. "Bold engineering and unconventional thinking will bring out nothing but the best in both our product and our people". This vision has earned Soundstream over 90 industry awards for innovation and performance.

 Use this coupon code at checkout to receive an 8% discount when you spend $250 on any of our Soundstream products including new 2009 models like:


Soundstream Stealth-13 Car Subwoofer


  • Proprietary cast aluminum basket
  • Inverted motor assembly
  • Solid aluminum cone
  • 2" mounting depth
  • 5" voice coil
  • 12 ga. direct wire terminal
  • Aluminum voice coil former
  • Semi-circular basket for venting
  • Optimized for a sealed enclosures
  • Cutout diamiter: 11.375"



Soundstream DTower Series Subwoofer Amplifiers


  • Power output:
    • 900 Watts RMS x 1 @ 2 ohms
    • 1400 Watts RMS x 1 @ 1 ohms
  • The worlds first vertical automotive stereo amplifier
  • Gloss black finish w/ brushed accents
  • Double sided pcb w/ smd components
  • aluminum alloy heat-sink


Planet Audio at OnlineCarStereo.com for 2009

Planet Audio at OnlineCarStereo.com for 2009


OnlineCarStereo.com Logo


We're sorry that we haven't updated you in a while but we've been hard at work adding the hottest new car audio / stereo models and brands to our product lineup for 2009!

Planet Audio At OnlineCarStereo.com


OnlineCarStereo.com is proud to announce that we are the first authorized internet retailer of Planet Audio mobile electronics. What makes Planet a front runner of car audio products is their experience in the marketplace and stability as a corporation. Combined that with state-of-the-art product, state-of-the-marketplace pricing, Planet is one of the strongest contenders on the market today.


Soundstream Rubicon Amplifiers

Newly Added: Soundsteam Rubicon Amplifiers
Soundstream Rubicon amps

The new Soundstream Rubicon amp line is here!
The entire line-up of amplifiers has been revised from inside out. Fromt he sleek and stylish new chassis, to the cleaner, more stable guts, the new rubicon amps are sure to impress all who look and listen.