10 min.
When you want to optimise the sound quality of your installation, the addition of subwoofers (or subwooferor sub) quickly became obvious. True pillars of any sound system Well-balanced, they amplify the lowest frequencies, for a more immersive listening experience. But one question often comes up: should you opt for active or passive subwoofers ? What are the advantages of each technology, and above all, which model should you choose to suit your needs?
In this comprehensive guide, we'll help you make the right choice for your home. informed choicewith technical explanations concrete examplesWe have a wide range of products for every type of audience, from DJs and live musicians to event professionals.
Understanding the difference between assets and liabilities
First of all, it's essential to understand what these two technical terms mean. In sound engineering, a active subwoofer is a model that embeds its own integrated amplifierwhile a passive box requires external amplification. This distinction plays a crucial role in the way you configure and use your sound system !
Active subwoofers: autonomy and simplicity
A active subwoofer is an all-in-one device that connects directly to your mixing desk or audio interface. Thanks to its integrated amplifierIt's self-contained, which makes it particularly attractive if you're looking for simplicity and efficiency. It's the ideal choice for mobile DJs, small bands or event organisers looking to limit the amount of equipment they need to transport.
The benefits:
✅ Installation is quick and intuitive: all you need is an audio cable and you're ready to play.
✅ The amplification is perfectly calibrated for the loudspeaker of the subThis ensures good bass reproduction.
✅ Built-in adjustments (volume, low-pass filter, phase) make it easy to adapt the sound to the room or environment.
✅ Fewer cables and equipment to carry and connect.
Disadvantages:
❌ The cost is often higher than passive models, not least because of the on-board amplification.
Passive subwoofers: modular flexibility
Conversely, a passive subwoofer does not contain its own amplification. It only works when connected to a external amplifier. This involves a slightly more technical configuration, but also much more flexible. This type of housing is very popular with sound techniciansand pro musicians in general
Advantages :
✅ The price is generally more affordablefor equivalent sound quality.
✅ The lack of an internal amp often makes it lighter and therefore easier to handle.
✅ We can choose the amplifier best suited to your needs and budget.
✅ In the event of a breakdown, it's easier to replace or repair a component (amp or cabinet).
Disadvantages :
❌ Configuration requires more advanced knowledge: power calculation, impedance, filtering, etc.
❌ Adding an amp and signal processor increases the amount of material to carry.
The active subwoofers are for you if you prefer to get straight to the point with a minimum of constraints, while the liabilities are for those who want total control over their sound system.
The best active subwoofers
The Alto Professional TS15S: power under control
With its 2500 W peak and its 15-inch loudspeaker, the Alto TS15S is a monster of power at the service of precision. It is designed to integrate with any systemand particularly the Alto TS range of loudspeakers. Its robust MDF enclosure ensures excellent resistance to vibration, and settings such as thephase alignment or EQ presets are perfect for adapting the rendering to the demands of the stage.
This cabinet is ideal for live events and DJ sets that require a high level of fast bass responsewithout distortion. Its combo inputs and XLR outputs ensure smooth signal management.
✅ 15-inch speaker for deep bass
✅ Phase control and adjustable EQ
✅ Comprehensive settings for customised rendering
❌ Substantial weight (almost 40 kg)
The Alto Professional TS15S: power under control
The Mackie Thump 118S: a safe bet for stages
This model offers a easy setup but formidably effective. Sound loudspeaker delivers up to 132 dB SPLsufficient for medium to large scenes. It comes with a stereo crossoverphase inversion and three filter modes to suit different styles of music.
Its ergonomic handles and low weight for an 18″ (37.2 kg) make it a mobile, high-performance option.
✅ High SPL and 18-inch speaker
✅ Intelligent crossover modes
✅ Very good value for money
❌ Less fine-tuning than other high-end models.
The Mackie Thump 118S: a safe bet for stages
LD Systems ICOA PRO 21 A: the all-round performer
This model amplified of 21 inches impresses with its ability to go down to 29 HzThe result is a very deep bass with remarkable definition. Equipped with a 3000 W peak class D amplifierit delivers up to 136 dB SPL. The on-board SysCore DSP offers a wide range of settings, including a 4-band parametric EQ, a delay of up to 50 m and specific modes such as the cardioid mode or low latency.
With its mobile applications for remote control and its ultra-sturdy plywood construction, it is resolutely cut out for toursthe festivals and big clubs. Its compact 21-inch format is a real asset when you're on the move.
✅ Very deep (29 Hz) and powerful bass (136 dB SPL)
✅ Advanced DSP with presets, EQ and remote control
✅ Integrated Bluetooth streaming
✅ Smart, compact design for transport
❌ High weight, but justified by performance
LD Systems ICOA PRO 21 A: the all-round performer
Passive subwoofers to consider
HK Audio LSUB-1200: light and efficient
With its 128 dB SPL with a bandwidth of up to 55 Hz, the LSUB-1200 from HK Audio is a good option for those looking for a compact, reliable and modular subwoofer. It comes with two M20 inserts for attaching a satellite, and its low weight (29 kg) makes it easy to transport.
Its multi-ply birch construction ensures good sound and durability. Its high output (101dB sensitivity) means you can get the most out of your amp, even at moderate volumes.
✅ Compact and lightweight
✅ High sensitivity (101 dB)
✅ Perfect for small stages or fixed installations
✅ Discreet, professional design
❌ Less bandwidth than some active models
HK Audio LSUB-1200: light and efficient
JBL PRX418S: an essential classic
Le PRX418S from JBL is an 18-inch passive subwoofer that has established itself as a benchmark. Capable of delivering up to 135 dB SPLit offers a linear bass response while remaining relatively compact. Its robust design in 18 mm plywood, combined with a steel grille and DuraFlex finish, ensures it will stand up to intensive use.
It also stands out for its versatility The PRX412M and PRX415M satellite speakers are ideal for use in both mobile and fixed sound systems. Thanks to its compatibility with Crown XTI series DSP amplifiersIt offers precise sound management with built-in filters and limitations.
✅ Up to 135 dB SPL for plenty of reserve power
✅ Robust speaker with professional finish
✅ Compatible with JBL PRX400 systems
✅ Excellent value for money for a passive solution
JBL PRX418S: an essential classic
QSC E118SW: the top-of-the-range benchmark
This model of 18 inches is a concentrate of power and precision. With a Maximum SPL of 133 dBIt rivals best active models. Designed for use with QSC GXD or PLD amplifiers, or TouchMix consoles, it benefits from DSP presets which considerably optimise the rendering.
Its E series design offers impeccable robustness and finish. Thanks to its multiple inputs (NL4 and terminal block), it adapts easily to any type of installation. It's a top choice for professionals who need to manage long-term performance.
✅ 800 W RMS power, up to 3200 W peak
✅ Advanced DSP compatibility
✅ Robust and professional finish
✅ Full connectivity
❌ High weight (43 kg)
QSC E118SW: the top-of-the-range benchmark
Active or passive: what should you choose for your sound system?
Choose an active subwoofer if :
- If you are a beginner or intermediate
- You want a solution plug & play
- Are you looking for a housing to be integrated into a system? modern and autonomous
- You want to limit the number of connectors
Choose a passive subwoofer if :
- You already have a suitable amp
- You would like a maximum modularity
- You are building a system made to measure for a controlled budget
- You need a lighter or more customised look
💡 Tip: For optimum sound coherence, always ensure that the phase between your subwoofers and satellite speakers is correctly aligned.
Conclusion: the right sub for the right purpose
In short, there is no right or wrong choice between a active and passive subwooferonly different needs. For a sound system mobile and simpleactive subwoofers like the Alto TS15S or the Mackie Thump 118S are unbeatable. On the other hand, for modular configurationsPassive systems such as the JBL PRX418S or the QSC E118sw offer greater scalability.
👉 Think about your type of serviceto your budgetbut also to the available space in your vehicle or storage space. A well-chosen cabinet will make all the difference to your sound performance!
