Sound Storm Laboratories PB8 8 400 W Powered Car 400 Watt Subwoofer & Amp

  
Much like the engine of a new automobile, a new subwoofer must go through a short but important process of "break-in" before it is run under harsh conditions. The "break-in" process will ensure the subwoofer is able to perform as it has been designed to. This process involves subjecting the subwoofer to no more than low-to-medium volume levels for a number of hours in the enclosure. 3-4 hours is generally sufficient for the subwoofer's suspension to loosen enough to prevent the voice coil(s) from overheating and causing failure. The break-in period is also effective in extending subwoofer life. Over-driving the woofer before it has been properly broken-in will usually result in premature failure and poor performance. 8 inch subwoofer, 400 high output class D built-in amplifier. MOSFET power supply, RCA (low) & speaker (high) level inputs. Variable low pass crossover, variable bass boost, phase selector switch: 0 or 180º. Slope: 12dB or 18 dB, T. 0.2%, Signal to Noise ratio:? Green LED power status indicator, red LED protection status indicator. Soft delay remote turn-on, Gain control, Remote subwoofer control. Systems with a built-in amplifier do not require the addition of an external amp. They already have the power to play louder. High and Low Level Inputs. High-level inputs accept speaker output signals and low-level inputs accept pre-amp output signals to allow for the addition of amps and processors to standard factory or aftermarket source units. Metal Oxide Semiconductor Field-Effect Transistors quickly switch from full to non-conduction for high efficiency output. Class-D amps run more efficiently and generate more power using a more compact design than traditional Class A/B amps.

Variable low-pass filter gives you control over the frequencies that pass through to the subwoofer. Variable Bass Boost allows you to adjust the low bass within the boost range to just the way you like it. Phase control lets you switch the speaker phase with the amp if your speakers or subwoofer are hooked up'out of phase'.

The Variable Input Control allows the amplifier input to match the output signal from the head unit to achieve optimum performance when adjusted properly.