L-Acoustics - KS28
The L-Acoustics KS28 is a reference high-power subwoofer housing dual 18-inch neodymium cone drivers in a bass-reflex enclosure. It delivers a low frequency limit of 25 Hz and a peak output of 143 dB SPL, establishing it as the highest-output subwoofer in the L-Acoustics portfolio for demanding touring and festival applications.
Specifications
- Configuration: Omni or cardioid subwoofer
- LF transducers: 2 x 18-inch neodymium cone drivers
- Acoustical load: Bass-reflex
- Low frequency limit (-10 dB): 25 Hz
- Max SPL (peak): 143 dB at 1 m (half-space)
- Nominal impedance: 4 ohms
- Weight: 79 kg / 174 lb
- Dimensions (H x W x D): 1340 mm x 550 mm x 719 mm
- IP rating: IP55
- Amplifier compatibility: LA12X
- Rigging: 2-point rigging system with 6 ergonomic handles, 2 ground runners, and 8 side runners
Applications
The KS28 is deployed in large-scale touring, outdoor festivals, and stadium-scale installations requiring maximum low-frequency output and extension. It operates in standard omnidirectional or cardioid configurations. Cardioid mode reduces stage-side energy and improves audience-facing uniformity. The integrated 2-point rigging and flush-fitting design allow efficient ground stacking or flying in multi-cabinet arrays.
Frequently asked questions
Which amplifier is required for the KS28?
The KS28 requires the LA12X amplified controller, matched to its 4-ohm impedance and power demand.
How does the KS28 compare to the KS21?
The KS28 uses dual 18-inch drivers, reaches 25 Hz (versus 29 Hz), and peaks at 143 dB SPL (versus 138 dB). It weighs 79 kg compared to the KS21's 49 kg.
Does the KS28 support cardioid mode?
Yes. Both standard omnidirectional and cardioid configurations are available, with cardioid directing output toward the audience and reducing rear energy.
If you have any questions, you are always welcome to contact us. We'll get back to you as soon as possible, within 24 hours on weekdays.
-
Shipping Information
Use this text to answer questions in as much detail as possible for your customers.
-
Customer Support
Use this text to answer questions in as much detail as possible for your customers.
-
FAQ’s
Use this text to answer questions in as much detail as possible for your customers.
-
Contact Us
Use this text to answer questions in as much detail as possible for your customers.
FAQs
What is your return policy?
All refunds and returns are determined by the manufacturer's terms of sale. Change-of-mind refunds are not accepted, but all valid warranty claims will be managed by AKA Acoustics in compliance with consumer law.
How long will it take to receive my order?
Freight lead times will be provided upon order confirmation. Standard items typically ship within 4–6 weeks, while custom orders may take 6–12 weeks.
Is my payment information secure?
Yes, all payments are securely processed through Stripe and are protected under their Terms of Service. AKA Acoustics do not store any payment information ourselves.
How are freight costs calculated?
Freight costs are determined at the time of quotation to ensure accurate pricing based on your specific order. For any questions, please email sales@akaacoustics.com
How can I contact support?
For account inquiries, email accounts@akaacoustics.com. For order support, email sales@akaacoustics.com.