Introducing OBCON’s new pre-loaded, amplified C-4 Series Subwoofer Enclosure System. This compact subwoofer system is the perfect factory upgrade for Chevy, Dodge, and Ford trucks…as well as many other vehicles. The trucks today do not have a lot of available space, but new digital technology in power efficiency allows the OBCON 600 watt digital amplifier (300 watt on single sub boxes) to perform at a quarter ohm, while measuring in at a compact 5.25″ x 4.5″ x 2″. Do not let the compact size of this digital amp fool you. The OBCON C-4 Series Subwoofer Enclosure System delivers low, clean, tight bass by combining this small, but powerful digital amplifier, with OBCON’s 300 watt, 10″ subwoofers. The digital amplifier and subwoofers are pre-loaded in a heavy-duty sealed OBCON subwoofer enclosure, so all you have to do is wire the enclosure to your audio output source. The C-4 Series Subwoofer Enclosure System gets maximum performance from each of the system’s components, because all of the components are designed and tuned to work perfectly in concert with each other to produce an efficient and explosive sound never before heard in such a compact amplified subwoofer system. We are so sure you will be thrilled with this C-4 Series Subwoofer Enclosure System, we are offering a 30-day money back satisfaction guarantee. THE AMPLIFIER SPECIFICATIONS: 300 Watt RMS/.05% THD/Frequency Response – 20Hz-150Hz/Crossover – 35Hz-150Hz/Bass Boost 0-12dB/Sub Sonic Filter – 20dB @ 20Hz/Remote Sensing Turn On/Hi-Low Level Inputs/Remote Level Control. THE WOOFER SPECIFICATIONS: 10″ – 250 Watt/2″ – 4 Layer Voice Coil/SVC/Rubber Surround/Steel Basket/Poly Cone/.5 Ohm VC/40oz Magnet. THE ENCLOSURE SPECIFICATIONS: 5/8″ American Made MDF/Tri-Lock Joint Re-enforcement/100% Manufactured in the USA/Sealed Common Chamber Design/Black Automotive Grade Carpet.