Subwoofers
QSC KS118: Full Specifications
Quick answer
The QSC KS118 Active 18" Subwoofer lists at $2,199.99. Published figures: powered Yes, peak power 3,600 W, woofer 18 in. It suits contemporary worship in a large room, especially where the platform booms.
An 18 inch cardioid-capable subwoofer that reaches into the low thirties. The cardioid mode is the point in a church: it keeps low end off the platform and out of the open microphones.
Every figure below is the manufacturer's own published specification, taken from the product listing and the data sheet. Where a figure is not published it is left out rather than estimated. Price is the listed price when this page was last compiled and it changes often.
QSC KS118 specifications
The QSC KS118 publishes powered Yes, peak power 3,600 W, woofer 18 in, at a listed price of $2,199.99.
| Specification | Published figure |
|---|---|
| Powered | Yes |
| Peak power | 3,600 W |
| Woofer | 18 in |
| Low frequency limit | 32 Hz |
| Onboard DSP | Yes |
What this model suits in a church
Best for: Contemporary worship in a large room, especially where the platform booms.
Category: subwoofers. Tier on this site: Expert, which on ChurchSoundCalc means the performance ceiling, for a large room or a multi-campus standard, and more than most churches need.
The closest alternatives at a similar price
Same category, nearest price. An alternative with no stated reason is filler, so each of these is here because it trades something specific against the model above.
JBL Professional PRX918XLF 18-Inch Powered Subwoofer, Portable PA, 2000 Watt, DSP, Parametric EQ, Bluetooth Low Energy (BLE), and APP Control
$1,499.00 Specs and sizingA deep-tuned 18 built for extended low frequency rather than maximum punch, with a full parametric EQ section for room correction.
Best for: Rooms with a difficult low-frequency response that needs correcting at the source
Check price on Amazon
QSC KS112 Active 12" Subwoofer
$1,299.99 Specs and sizingA compact 12 inch subwoofer that fits under a platform or beside a riser, which is often the difference between a subwoofer existing and not.
Best for: Mid-size rooms with no floor space to spare
Check price on Amazon
Electro-Voice ELX200-18SP 18" 1200W Powered Subwoofer
$1,099.00 Specs and sizingAn 18 inch powered subwoofer with cardioid presets and fly points, at roughly half the price of the flagship options.
Best for: The first subwoofer a growing contemporary church buys
Check price on Amazon
Yamaha DXS12 MKII Powered Subwoofer
$969.99 Specs and sizingYamaha processing with cardioid mode in a 12 inch cabinet light enough for one volunteer to move.
Best for: Portable setups that want low end without a two-person lift
Check price on AmazonSide by side
| Model | Price | Powered | Peak power | Woofer | Onboard DSP | Low frequency limit |
|---|---|---|---|---|---|---|
 QSC KS118 Active 18" Subwoofer | $2,199.99 | Yes | 3,600 W | 18 in | Yes | 32 Hz |
| JBL Professional PRX918XLF 18-Inch Powered Subwoofer, Portable PA, 2000 Watt, DSP, Parametric EQ, Bluetooth Low Energy (BLE), and APP Control | $1,499.00 | Yes | 2,000 W | 18 in | Yes | - |
| QSC KS112 Active 12" Subwoofer | $1,299.99 | Yes | 2,000 W | 12 in | Yes | 41 Hz |
| Electro-Voice ELX200-18SP 18" 1200W Powered Subwoofer | $1,099.00 | Yes | 1,200 W | 18 in | Yes | - |
How we chose
We did not test these products in person and we never claim to. Picks are researched from manufacturer specification sheets and operator manuals, FCC rules where spectrum is involved, published standards, warranty terms, and the recurring themes in verified owner reviews. Every pick is matched to a real room size, seat count or input list rather than to a price bracket, and it is placed in the tier where its capability actually belongs. Where a product is wrong for most churches we say so on the page.
Sources
- QSC published specifications for the KS118
- Amazon product listing features and current pricing
Frequently asked questions
How much does the QSC KS118 cost?
It was listed at $2,199.99 when this page was last compiled. Pro audio and video pricing moves frequently and promotional pricing is common, so treat that as a planning figure and confirm the current price before a committee votes on a budget.
Is the QSC KS118 right for our church?
Contemporary worship in a large room, especially where the platform booms. Beyond that, the honest test is whether its numbers match your room rather than whether it is a good product in the abstract. Work out what your room actually needs first, then check this model against that answer.
Where do these specifications come from?
The manufacturer’s published figures, taken from the product listing and data sheet. We do not test products in person and we never claim to, so nothing here is a measured result. Where a specification is not published by the manufacturer it is omitted rather than estimated.
Researched, not professional advice. This page is compiled from published manufacturer specifications, operator manuals, FCC rules, published standards and owner-review consensus, not hands-on testing. Sound system design, rigging loudspeakers overhead, and any electrical work are jobs for a qualified professional: have flown loudspeakers and their attachment points signed off by a structural engineer or a certified rigger, and have all wiring done by a licensed electrician to your local code. Wireless microphone rules change, so confirm the current FCC position before buying. As an Amazon Associate we earn from qualifying purchases.