A pair of new front speakers and a subwoofer is one of the most common aftermarket audio upgrades. The link500.4mini is the perfect amplifier for this application. When used in 3-channel mode, the amplifier can produce 125 watts x 2 for the main speakers and 250 watts x 1 for the subwoofer, so it won’t lack for power. Speaking of the subwoofer, channels 3/4 have a 1-band PEQ, a subsonic filter and the ability to add an RLC to fine tune the subwoofers performance. The link500.4mini has our new adaptive loading technology plus the ability to handle up to 40V of hi-level input. It also has fully adjustable high and low pass crossovers. For factory audio systems where no full-range signal is present, the link500.4mini has built-in summing, so it can handle that internally, without the need for an outboard processor. Like all Wāvtech amplifiers, the link500.4mini is start/stop system compatible. link500.4mini Features 500 Watt 4-Channel Amplifier 75 watts x 4 @ 4 ohms 125 watts x 4 @ 2 ohms 250 watts x 2 @ 4 ohms BTL Small Footprint Only 9”x4.5”x1.65” Adjustable Paragraphic EQ (Channels 3/4) Variable Subsonic Filter (Channels 3/4) Variable Hi/Low Pass Crossover (-12dB/oct) Remote Level Control (RLC) w/Optional linkRC (CH 3/4) Built-In Summing w/Level Trim Adjsutment Start/Stop Sytem Compatiable Differential Balanced Inputs Variable Gain Adjustment w/Clip LED Auto Turn-On via DC-Offset or Audio Signal Detect Adaptive OEM Load Technology Locking Detachable Hi-Level Speaker Terminals Professional Grade Panel Mount RCA’s Compact Aluminum Chassis w/Detachable Mounting tabs link500.4mini Specifications Input Sensitivity SPK: 1-20Vrms, 2-40Vrms RCA: 0.2V-5Vrms, 0.4V-10Vrms Max Input Voltage (SPK): 40Vrms Frequency Response: 43kHz (+0/-3dB) THD+N: 78dBA (1W, 4Ω)