Here are some of the features of the Legacy LA2228:
Mono Block Subwoofer Amplifier 1 Ohm Stable MOSFET Power Supply PWM ( Pulse-Width-Modulation ) System Glass Epoxy PCB Gold Plated RCA Inputs Custom Terminal Block for Speaker Connection Thermal / Overload / Short Circuit protection Variable Subsonic Filter (15Hz-40Hz, 24dB/ octave ) Phase Control 0-180 degree Remote Bass Boost Input Impedance: 10K Ohms Soft Turn ON/OFF Advanced Protection Circuitry S/N Ratio: > 90dB Dimensions: 1.97'' H x 11.42'' W x 12'' L
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