The Pro 2.4S is a 4-channel digital audio processor. Designed with the highest technology, it offers vital features and adjustments for car audio, such as: crossover with multiple filters, 15-band graphic equalization, 12 pre-defined equalizations, parametric equalization, alignment, routing, phase inversion, limiter, input and output clip indicator, remote signal output to activate amplifiers, audio generator, among many others. In addition, it features an audio input via RCA and also a high level input, allowing use with conventional and original head units (eg multimedia without RCA output). Another advantage of this product is the anti-puff system, which prevents those infamous pops when turning the sound on and off. All this and much more to keep your sound system always tuned, aligned and with the quality you deserve.