Wāvtech link 300.4 Mini 4-channel OEM Amplifier

The link 300.4mini is in a class by itself. The most obvious thing is its extremely small size, but don’t Iet that fool you. Unlike most small-footprint amplifiers, the link300.4mini is bridgeable. It can easily drive a nice set of components as well as a subwoofer. The link300.4mini has Wāvtech’s best-in-class LOC, with built-in loading and the ability to handle up to 40V of high-level input.

Perhaps the most unique feature is the built-in summing. For factory audio systems that don’t have a full range signal, the link300.4mini can handle that internally, so no additional processor is required. As if all of that isn’t enough, the link300.4mini is compatible with OEM start/stop systems as well.

Product Features:

Output Power

• 50 watts x 4 @ 4 ohms
• 75 watts x 4 @ 2 ohms
• 150 watts x 2 @ 4 ohms BTL

Features

• Small Footprint Only 6.4”x4.5”x1.65”
• Variable Hi/Low Pass Crossover (-12dB/oct)
• Variable Subsonic Filter (-12dB/oct)
• Built-In Summing w/Level Trim Adjustment
• Start/Stop System 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 Aluminium Chassis w/Detachable Mounting tabs

Amplifier switches/dials located on the top panel:

What's in the box:

INPUT CH - These switches are for selecting which input channels feed the respective channels. For 2-channel sources, connect the source to CH1/2's RCA or speaker level inputs and set CH3/4's input select to copy (1/2). For 4-channel sources, set CH1/2 to direct (1/2) and CH3/4 to direct (3/4). : For a 3-channel system from a factory 2-way source, CH1/2 would be set to sum (1+3/2+4) for full-range output to the main speakers, while CH3/4 would be set to direct (3/4) to pass only the factory woofer signal to drive the subwoofer.

INPUT RANGE - Choose the input range that will accommodate the source's maximum output signal voltage without excessive clipping, 5V or 10V for low level (RCA) inputs, and 20V or 40V for speaker level inputs.

GAIN - Each channel pair has a variable gain with corresponding clipping indicator, where the clip LED will dimly illuminate just before the onset of clipping and become fully bright when the amplifier has reached full power output at clipping. When summing, these gain adjustments should be used for matching relative levels so that the combined signals sum as close to flat as possible or to the desired frequency response. Note that CH3/4's gain adjustment will be bypassed if its input select switch is set to copy (1/2).

FILTER - This switch selects the filter mode as either a high-pass (HP) or low-pass (LP) crossover, and is bypassed when set to OFF (default).

FREQ - When either the HP or LP filter mode is activated, this variable adjustment sets the filter's cut-off frequency (F3) from 50Hz to 500Hz with a slope of -12dB/oct.

LEVEL TRIM - When summing, and after setting gains and crossovers for appropriate frequency response, these adjustments allow the power output of CH1/2 and CH3/4 to be increased or decreased independently by up to +/-6dB for final volume balance between them while preserving the summing ratio established by the gains.