Thunder-KS2 I
The Thunder-KS2 I is an active subwoofer from K-Array, integrating an 18-inch neodymium magnet woofer with a four-channel Class D amplifier and built-in DSP. Designed as the core of K-Array sound reinforcement systems, it powers passive midrange loudspeakers and passive subwoofers directly via its SpeakON outputs.
Specifications
- Type: Active subwoofer
- Woofer: 18-inch neodymium magnet, long excursion
- Frequency response: 35 Hz to 150 Hz / 450 Hz (-6 dB, with dedicated preset)
- Max SPL: 137 dB (crest factor 4, measured at 1 m)
- Amplifier: 4-channel Class D, 4 x 1500 W at 4 ohm
- Nominal impedance: 8 ohm
- Crossover: DSP-controlled, low-pass at 150 Hz (preset dependent)
- Line input: 2 x XLR female, analogue and AES3
- Line output: 2 x XLR male link, analogue and AES3
- Speaker output: 2 x SpeakON NL4
- Mains connector: powerCON TRUE1 TOP
- Networking: 1 x RJ45, 4 x USB-A
- Control: Wi-Fi mobile app (K-Discovery), K-framework3 via wired Ethernet
- Dimensions (W x H x D): 650 x 500 x 580 mm
- Weight: 34 kg
- Enclosure: Polyurea-coated birch plywood
- Colours: Black, White, Custom RAL
Applications
The Thunder-KS2 I suits live sound reinforcement, touring, and permanent installations where a compact powered subwoofer must also distribute signal to passive satellite loudspeakers. Its onboard four-channel amplifier and SpeakON outputs allow a single unit to drive multiple K-Array passive speakers without a separate amplifier rack.
Frequently asked questions
Can the Thunder-KS2 I be controlled remotely without a laptop on site?
Yes. The unit supports Wi-Fi control via the K-Discovery mobile app for real-time DSP parameter adjustment and signal routing from a smartphone or tablet.
Does the Thunder-KS2 I pass signal to additional loudspeakers?
Yes. Two SpeakON NL4 speaker outputs allow the amplifier module to drive a range of K-Array passive loudspeakers directly from the subwoofer.
What is the lowest frequency the Thunder-KS2 I can reproduce?
The unit extends bass response to 35 Hz (-6 dB) when a dedicated DSP preset is loaded.
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.
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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.