This is the Wavtech  LINK500.4MINI MINI Amplifier (4 x 125W RMS - Class D 4-Channel)

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 paragraphic EQ, a subsonic filter and the ability to add an RLC to fine tune the subwoofers performance.

The link500.4mini has Wavtech’s link4 built-in, with internal loading and 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 Wavtech amplifiers, the link500.4mini is start/stop system compatible.

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 9.2" x 4.5" x 1.65"
• Adjustable Parametic EQ (Channels 3/4)
• Varaiable Subsonic Filter (Channels 3/4)
• Variable Hi/Low-Pass Crossover (-12dB/oct)
• Remote Level Control (RLC) w/ Optional linkRC (Channels 3/4)
• Built-In Summing w/ Level Trim Adjustment
• Start/Stop Sytem Compatible
• Differential Balanced Inputs
• Variable Gain Adjustment w/ Clip LED
• Auto Turn-On via DC-Offset or Audio Signal Detect
• OEM Load Detect Compatible
• Locking Detachable Hi-Level Speaker Terminals
• Professional Grade Panel Mount RCA’s
• Compact Aluminum Chassis w/ Detachable Mounting tabs