Passive Subwoofers
Passive subwoofers, unlike active subs, lack internal amplification and require an external amp for power. Functionally similar to hi-fi speakers, they are designed specifically for low frequencies, capable of matching or even exceeding the depth of active subs when paired with the right amplifier.
Passive subwoofers, unlike active subs, lack internal amplification and require an external amp for power. Functionally similar to hi-fi speakers, they are designed specifically for low frequencies, capable of matching or even exceeding the depth of active subs when paired with the right amplifier.
Often used in custom installations, passive subs offer flexibility for bespoke systems, including in-wall or on-wall setups. These typically require a dedicated subwoofer amp with controls like crossover, gain, phase, and level adjustments to ensure optimal integration and performance.
Kanto SUB8 Vinyl Subwoofer - Matte White
Monitor Audio IWS-10 In Wall Subwoofer
Monitor Audio Climate CLG-W10 Outdoor Subwoofer
About Passive Subwoofers
Passive subwoofers differ from active models in that they lack built-in amplification, requiring a dedicated subwoofer amp or speaker-level connection to operate. They are often found in custom installation setups, such as in-wall, on-wall, or in-ceiling designs. While they’re built to handle the power needed for deep bass, proper pairing with an appropriate amplifier is crucial for optimal performance.
In-wall subs can sometimes be powered directly from AV receivers (AVRs) with assignable speaker terminals, removing the need for a separate sub amp. However, balancing roll-off and gain will need to be managed through the AVR’s menu settings.
Freestanding passive subwoofers, though less common today, are designed with a hi-fi philosophy, prioritising frequency range and tonal character. Often sharing technology with high-end speakers, they suit premium systems that utilise modular power amps or monoblocks, delivering precision and performance on a larger scale.
Passive Subwoofer FAQs
How do you power a passive subwoofer?
Passive subwoofers can be powered through assignable outputs on an AV receiver or a dedicated subwoofer amplifier. A sub amp offers controls like crossover, phase, and gain for precise tuning while an AVR shares power with other channels and requires configuring the roll-off in its system settings.
Can I connect a passive subwoofer to pre-out?
Only active subwoofers or dedicated sub amps can connect to an amplifier’s pre-out. This is because passive subs only accept speaker-level signals, while a pre-out provides insufficient current to drive a speaker. Passive subs require amplification to handle the power needed for proper performance.
Which is better, a passive or active subwoofer?
Passive and active subwoofers serve different purposes and suit different needs. Active subs are widely available, easier to set up, and don’t require extra components. Passive subs, on the other hand, are often used in in-wall or on-wall installations because they offer greater system customisation.
