If you are looking for big bass power at an unexpected pricepoint, you may want to check out the Audiopipe APNK-40001 monoblock amplifier. The APNK-40001 is designed for reliable audio power, regardless of load impedance, right down to one ohm. With a suggested retail price of $566.99, it's one of the most affordable ultrahigh-power amplifiers available.
The big monoblock looks pretty good, and feels it too, with a weight of right around 30 pounds! A black anodized extruded aluminum heatsink is finished in a brushed “hairline” look, just like expensive home audio components. On one end of the amp you will find the nickelplated 1/0-AWG power terminals and a set of four-AWG speaker outputs. The opposite end of the amp locates the signal inputs and outputs, which are rugged, highend-looking, panel-mount-style RCAs, as well as the adjustment pots for gain, a 50- to 250-Hz lowpass filter, 15- to 40-Hz subsonic filter, and bass EQ boost level with up to 18 dB of boost.
Self-protection comes in the form of built-in protection modes for thermal, short circuit, and low battery voltages. With an amplifier this massive, sturdy mounting feet are important, so the APNK-40001 comes with strong heavy-gauge steel tabs integrated into the amplifier's end panels. Also included is a wired remote level control, so you can fine tune the amount of bass you get right from the driver's seat. Inside the amplifier you find a double-sided PCB, along with specially treated transformers to improve reliability and eliminate transformer noise. Signal transfer from the output stage of the amp to the speaker terminals is accomplished via heavy-gauge pure copper stranded cables. The small signal parts are all traditional through-hole parts, and the amp sports 15 3,300-μF high temperature capacitors in the primary and another 10 1,200-μF caps in the high voltage stage. The amplifier did not come with any fusing, so this is something the installer would need to add during installation.
When I get a powerhouse like this in my listening system, it's always a treat because it's one of those situations where I can simply play things as loud as I like without ever worrying about reaching the amplifier's limits. I connected the APNK-40001 to four 15-inch woofers in sealed enclosures, with a final impedance of two ohms. After setting