Bundle and save on your sound system upgrade thanks to a Massive Audio package deal from OnlineCarStereo.com. These exclusive kits pair their speakers and subwoofers with an amplifier from leading brands such as Crunch, Kicker and Alpine. A Massive Audio HIPPO XL bundle produces the ultimate “big bottom bass” with a sparkling clean sound. Full-range kits are also available for compact cars, trucks and boats. Experience the perfect pairing at a great price that includes free lifetime tech support.