Z-Series have become a real benchmark standard for affordable amplifiers. Packed with features that normally come with a higher price the Z-Series is a real winner. And the Z3004i is an excellent choice for any discerning bass enthusiast, the Z3004i 300W 4-channel amplifier has an integrated cooling fan that regulates amplifier temperature for sustained performance. The Phoenix Gold Z amplifiers have high reliability and load capacity at a competitive price. Like every Phoenix Gold product, the Z3004i amplifiers are built with the same R & D and control as all other product ranges, which guarantee quality and power.