Subwoofers are designed to increase the bass frequencies, resulting in a deep, thumping sound. In most cases, they are paired with an amplifier to boost the sound. If you do not have the funds for both components, you can still hook up a subwoofer without an amplifier; it simply involves a little more know-how.
Does a subwoofer need to be powered?
A subwoofer (sub) is speaker, that is dedicated to the reproduction of low-pitched audio frequencies most commonly referred to as bass. Passive Sub: Passive subs are called passive because they need to be powered by an external amplifier or Audio/Video (A/V) receiver . This is similar to traditional speakers.
How many amps do you need for a subwoofer?
Using Ohms Law, and 120 Volts as the standard Electricity Board-rated single-phase voltage at all domestic devices and switchboards, (which is common for the major countries like USA, Europe and so on), the Amp Rating of a typical 1,000 Watt power Subwoofer would be 11 Amps RMS (Root Mean Square value), or Peak 15
Do I need a preamp for my subwoofer?
Ideally you need to be running separate preamps and power amps. You use a separate low-level crossover to split the preamps output into main (high-frequency or HF) and sub (low-frequency or LF) signals. Today, look around for a low-level active crossover to suit your taste.