It is a project of amplifier on tda7294. Power supply is transformer 2x26V and 6x4700uF. Preamplifier and the filter is a separate car crossover clarion (Japan). The filter is connected to the Unitra amplifier version Altus V-60. The housing was made of aluminum. The front and back plate is thicker than the rest. Heat sinks were taken from two Tosca amplifiers.