BOSS Audio Systems B12ES 12 1200 W Powered Car Subwoofer Single 4 Ohm

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. 12-inch subwoofer, Built-in class A/B amplifier, MOSFET power supply. Single voice coil, RCA (low) & speaker (high) level inputs, soft turn-on circuit.

Thermal overload speaker short protection, power & protection LEDs. Subwoofer level control, switchable phase shift selector: 0 or 180 dB. Variable low pass crossover: 50 - 150 Hz.

Variable bass boost, variable input gain control, speaker impedance: 2.6 ohms. S/N ratio: 98 dB, frequency response: 15 - 120 Hz. Systems with a built-in amplifier do not require the addition of an external amp. They already have the power to play louder. Our Class-A/B amplifiers feature specific linear circuitry that increases sound quality and power output while reducing distortion and improving efficiency. Metal Oxide Semiconductor Field-Effect Transistors quickly switch from full to non-conduction for high efficiency output. 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. This comes in handy if you are installing your subwoofer with the magnet facing out. Reverses the polarity (Positive/Negative) on your subwoofer terminals to reverse the direction of the low frequency BOOM that you are used to hearing. Variable Bass Boost allows you to adjust the low bass within the boost range to just the way you like it.

Variable low-pass filter gives you control over the frequencies that pass through to the subwoofer. The Variable Input Control allows the amplifier input to match the output signal from the head unit to achieve optimum performance when adjusted properly.