If you’re installing passive subwoofers in your speaker array, you’ll need some form of amplification. Adding a separate subwoofer amplifier rather than powering it through an existing amp or receiver will go a long way in taking the audio experience to a higher level because these specialized amps do more than add power. Subwoofer amps filter low frequencies (that bass we love) away from other speakers so those speakers can focus on the mid and high frequencies. The result is much cleaner highs and midrange and bass that is truly distinguishable if not earth-shaking. What type of amp you choose depends on the system you’re designing, but before you buy, explore the different power ratings, features and amp classifications such as the tried and true A/B typology versus newer and highly efficiency Class D with Digital Sound Processing.
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