Theory Audio Design sub15 Passive Subwoofer

About The Theory Audio Design sub15 Passive Subwoofer

Today’s immersive, high-resolution audio soundtracks are bigger, bolder, and more demanding than ever. And whether it’s in a high-end commercial space or a serious home cinema, deep, dynamic low-frequency reproduction is essential. That’s where Theory’s passive in-room subwoofers come in - available in 12" and 15" models, built to match the scale and intensity of modern content. 

The sub15 is Theory’s largest in-room subwoofer, featuring a powerful 1,000 Watt, 15" (381 mm) long-throw driver with a hefty 3" (76mm) voice coil. It delivers up to 124 dB of output, producing bass that feels bigger than physics should allow - deep, tight, and impressively musical. It’s the highest-output subwoofer in its class, but there’s more to it than just power. The sub15’s enclosure, made from solid high-density fibreboard with elegantly curved edges and a sleek high-quality black finish, is designed to look as good as it sounds. No need to tuck it out of sight - this is a subwoofer you’ll want to show off.

Still, it’s the performance that truly stands out. Theory subs dig deep with texture, detail, and gut-punching authority. Paired with Theory’s full-range loudspeakers, the sub15 rounds out the system with visceral low-end energy, elevating everything from blockbuster soundtracks to live music mixes. The sub15 isn’t just heard - it’s felt. And once you’ve experienced it, there’s no going back.

The Theory of Everything: Theory is genuinely unique - their products have completely changed the level of performance attainable from small to medium size installed sound systems. Part of the way they attain this level of performance is by employing proprietary DSP techniques to process the signal for their loudspeakers and subwoof­ers with a very high degree of precision.

As such, the Theory ecosystem of products is a little different than what you're used to as all The­ory loudspeaker models require the application of Theory High Resolution Digital Loudspeaker Processing. For this reason, it is best to think of Theory loudspeakers as "active" or "powered" speakers - Theory have just elected to place the electronics, normally installed inside the loudspeaker itself, in rack-mountable chasses, outside the harsh environment of the loudspeaker, and where wiring and service of the electronics can be accomplished painlessly.

So, when configuring system designs, always pair your chosen Theory loudspeakers with appropriate Theory Amplified Loudspeaker Controllers. These highly powerful and flexible units will make deploying Theory systems simple and painless and will guaranty the best performance available for your application.

Applications

High Output Surround Sound Systems: High-end home theatres, residential and commercial media rooms, gaming systems, executive boardrooms and conference rooms

Two-Channel Music Systems: Premium residential and corporate stereo music systems, music and performance higher education

Background and Foreground Business Music Systems: Bars and sports bars, restaurants, retail stores, hotels, houses of worship, corporate conference, screening rooms, lobbies, and casinos, etc

Music and Video Post Production: Surround and Dolby Atmos mix rooms, music post production

Our Review

The Theory Audio Design sub15 is a serious subwoofer, built to handle the most demanding modern soundtracks with effortless power and control. With a massive 15" long-throw driver and 1,000 Watts on tap, it’s Theory’s biggest in-room subwoofer and delivers bass that’s not only deep and authoritative but surprisingly musical, too. It’ll shake the floor when needed, sure - but it also brings nuance and texture that elevates everything from cinema sound to high-end two-channel listening. The sleek, curved high-density fibreboard enclosure looks as refined as it sounds, so you won’t feel the need to hide it away. Designed to integrate seamlessly into the broader Theory ecosystem - powered by their advanced Amplified Loudspeaker Controllers - the sub15 delivers precision-tuned performance that’s best-in-class. When you’re fitting out your top-tier home theatre, this is bass you feel in your chest - and you’ll wonder how you ever lived without it.

Main Features & Specifications

• Design: High-Output 15” Passive Subwoofer
• Operation: Passive, Requires 1 Theory Loudspeaker Controller Amp Channel
• DSP Requirements: Requires Model-Specific Theory-Certified DSP Loudspeaker Processing
• Driver: 1 x 15" Theory High-Output Woofer with 3-Inch Voice Coil
• Enclosure: Painted HDF (High Density Fibreboard) Enclosure, Fabric Grille
• Terminals: Twin Spring-Loaded Push Terminals
• Outdoor Capability: Indoor Use Only
• Bandwidth: 22Hz - 125Hz, -3dB
• Sensitivity: 96dB SPL/1m
• Power Handling:
  • 500W (AES)
  • 1,000W (Continuous)
  • 2,000W (Peak)
• Minimum Recommended Power: 250W RMS
• Maximum Output
• 124dB SPL / 1m (based on AES power rating)
• 130dB SPL / 1m (peak)
• Nominal Impedance: 4 Ohms
• Included Accessories: Black Fabric Grille
• Colour: Black
• Dimensions (WxHxD): 597 x 541 x 503mm
• Weight: 34.5 kg
• Manufacturer's Warranty: 5 Years. Does not include misuse.

Note: Features & Specifications Subject To Change Without Notice. E&OE.