Thunder-KS3P I
The Thunder-KS3P I is a passive subwoofer from K-Array, housing a 21-inch long-excursion neodymium magnet woofer with a 4-inch voice coil. It connects to external K-Array amplifiers via SpeakON NL4 connectors and supports daisy-chaining to additional loudspeakers in both 2-wire and 4-wire configurations.
Specifications
- Type: Passive subwoofer
- Woofer: 21-inch long-excursion neodymium magnet, 4-inch voice coil
- Frequency response: 30 Hz to 150 Hz / 300 Hz (-6 dB, with dedicated preset)
- Max SPL: 139 dB (crest factor 4, measured at 1 m)
- Rated power: 2800 W peak
- Nominal impedance: 4 ohm
- Crossover: External DSP-controlled, low-pass at 150 Hz (preset dependent)
- Connectors: 2 x SpeakON NL4 (input and loop-through output)
- Dimensions (W x H x D): 735 x 580 x 700 mm (includes 17 mm removable rubber feet)
- Weight: 49.2 kg
- Enclosure: Polyurea-coated birch plywood
- Colours: Black, White, Custom RAL
- IP rating: IP54
Applications
The Thunder-KS3P I suits permanent installations in environments where passive operation and IP54 weather resistance are required, such as outdoor entertainment venues, aquatic facilities, marine applications, and beach clubs. A dedicated preset on the controlling K-Array amplifier is required for correct low-frequency tuning.
Standards and compliance
IP54 ingress protection rating (dust partial protection, water splash resistance from any direction). For critical permanent installations such as swimming pools, beaches, and yachts, K-Array recommends additional protective measures beyond the rated IP54 level.
Frequently asked questions
Does the Thunder-KS3P I include any amplification or DSP?
No. The KS3P I is a passive unit with no built-in amplification. It requires a compatible K-Array amplifier with a dedicated preset to operate.
How does the Thunder-KS3P I connect to additional speakers?
Both SpeakON NL4 connectors support 2-wire and 4-wire cable configurations, allowing the signal to be routed through to further passive loudspeakers in the same installation.
What is the peak power handling of the Thunder-KS3P I?
The woofer and enclosure are rated for 2800 W peak power, delivered from a compatible external amplifier.
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.