Active Subwoofers

Active subwoofers are the most common type of subwoofer. What makes them "active" is the inclusion of a dedicated amplifier built into the unit to drive the woofer.

Designed for compatibility with most audio systems, they are typically connected to your amp or AV receiver via an LFE output or the left pre-out connection. Active subwoofers come in all shapes and sizes, with compact and slimline options to fit into everyday entertainment systems and larger, more powerful models for dedicated home cinemas.

A good subwoofer can transform your audio system by enhancing the low-end frequencies that even the best floorstanding speakers may struggle to reproduce. This adds a greater sense of depth and weight to the sound, elevating your overall listening experience.

About Active Subwoofers

Active subwoofers are an easy way to add depth and weight to your system, whether you're enhancing a hi-fi setup or a home cinema system. However, the type of subwoofer you choose will depend on your specific goals, as the requirements for a music system differ from those of a surround sound setup.

For hi-fi systems, key considerations include timing, power, and crossover settings. These factors determine how the subwoofer integrates sonically with your main speakers. Speed of response is critical—if the subwoofer is slower than your speakers, you’ll lose the punch and dynamics in the low-end. Hi-fi-oriented subwoofers generally don't reach the lowest frequencies but do excel in control, subtlety, and accuracy, delivering pitch-perfect timing that refines your hi-fi experience.

In contrast, when choosing a subwoofer for a cinema room, the focus shifts to depth, dynamic response, and power handling. Cinema subwoofers are designed to reach lower frequencies, offering more power to create a physical, immersive experience by moving a greater volume of air. While they may lack the nuance of hi-fi subwoofers, they excel in delivering dramatic, impactful soundscapes that elevate the cinematic experience.

When selecting a subwoofer, it’s essential to consider your speaker setup. Ensure there is a reasonable overlap between where your main speakers roll off and the subwoofer takes over. This balance is key to achieving seamless integration.

Most models also include controls like level adjustments, a high-pass filter (HPF), and a phase switch, with premium models providing more advanced customisation. These features help fine-tune the subwoofer to match your room’s acoustics and your system’s layout.

Active Subwoofer FAQs

What is an active subwoofer?

An active (or powered) subwoofer is one that has an amplifier built in. This means they don’t need external amplification to drive the woofer, making them more flexible for a range of applications. These subs typically feature RCA/LFE connections, though they can also feature Neutrik or XLR inputs.

Which is better? Active or passive subwoofers?

Active subwoofers are user-friendly, convenient, and easy to integrate, making them better for most setups. However, passive subwoofers offer unique benefits for custom installations, bespoke systems, and better tonal matching, ideal if you're seeking a more tailored audio experience.

Do 10-inch subs hit harder than 12s?

12-inch subs generally hits harder, with more bass, but 10-inch subs can sound punchier in smaller spaces. This is because a subwoofer with a 12-inch woofer can move more air and generally handle more power, but 10-inch subs, being smaller, perform better in compact spaces thanks to room acoustics.