Subwoofer control allows you to adjust the cut-off frequency and output level from your subwoofer, giving you greater control of the bass from your Pioneer sound system.
Pioneer's Class-D amps transform very little power into heat while a very high percentage of the power supply (67%) is transformed into the load. This results in a very compact amp which needs little input power to produce very high output power. The Class-D amplifier’s PWM (Pulse Width Modulator) modulates the original audio input signal with another signal which has a much higher fixed frequency. The result is a digital signal which contains the input signal and a band of frequency components around the modulation frequency. A LPF (Low Pass Filter) will then filter out the high frequency pulses and the resulting amplified output signal is then sent to the subwoofer and/or speakers.
A Low Pass Filter is a Crossover network that divides up the audio signal into its component parts of high and low frequencies. The Low Pass Filter sends the bass (low frequency) signal to dedicated subwoofer amplifiers or subwoofer drivers.
RCA input allows simple connection to a head unit for optimum signal pat and audio performance.