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We currently have this product in stock and available for dispatch.
Stock Location
| UK Distribution Hub: | 1 |
"Get it" shows the next available date that we will be able to deliver this item to you on, depending on the delivery option you select, and the stock availability of anything else that you add to your shopping basket.
1-year warranty & 30-day money-back guarantee included
If you decide your order isn't suitable for any reason you can return it - just let us know within 30 days of receiving it. Please keep hold of all the original packaging until you're sure you want to keep the order.
Eligibility for Money Back Guarantee
For hygiene and software licensing reasons, some items are only eligible for our Money Back Guarantee if they are returned to us unused and sealed in the original packaging with all software still "unregistered."
Details of exclusions are shown within the product descriptions.
Products include:
- Monitors and Headphones
- Earplugs and Ear Protection
- Reeds and mouthpieces for woodwind and brass instruments
- Mouth and Lip-Care Products
- CDs, DVDs and Software
We can collect your return for a small fee, or you can send it back to us yourself. The collection fee can be found in the returns information on each product's page on Gear4music.
In the unlikely event that any item in this order is faulty, damaged or incorrect on receipt, notify us within 14 days and we'll arrange a free collection.
When returning an order please ensure products are appropriately packaged and protected, to prevent them from getting damaged.
This table provides an overview of your statutory consumer rights, compared with our standard returns policy and optional extended money back guarantee and warranty.
| UK & Europe | EU Standard | Gear4music Standard | Gear4music Optional |
|---|---|---|---|
| Return Period | 14 days | 30 days | up to 180 days |
| Standard delivery charges refunded? | Yes | Yes | Yes, up to 30 days |
| Upgraded delivery charges refunded? | Standard costs only | Standard costs only | Standard costs only |
| Free collection on cancellation | No | No | Yes, up to 30 days |
| Free collection if defective, delivered damaged or incorrect item | Yes, within 14 days | Yes, within 14 days | Yes, within 30 days |
We are unable to accept returns of any custom made items designed to work together as a unique package and some items are only eligible for money back guarantee if they are returned to us unused and sealed in the original packaging. For full information on our returns policy, please refer to our returns and refunds information guide.
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Key Features
The Mackie Thump18Sv4 18" Professional Powered Subwoofer is a powered subwoofer designed for extending low-frequency performance in PA systems. Combining a 1400W Class-D amplifier with a high-performance 18-inch woofer, it delivers deep bass with a maximum SPL of 132 dB and low-frequency extension down to 25 Hz. Selectable high-pass modes make it easy to match the subwoofer with a wide range of loudspeakers, while a variable crossover option allows for more precise tuning. With stereo XLR inputs and outputs, plus the ability to chain additional subwoofers, it integrates easily into live sound setups. Built-in carry handles and a robust enclosure make it suitable for regular transport and use.
Nearly New: This product may have been opened for quality control purposes, returned by a customer, refurbished, or may have non-essential parts or software missing. Otherwise, the product operates as new. This is a great opportunity to buy a fully functioning product at a discounted price.
Product Ref: 397931
The Thump18Sv4 pairs a 1400W Class-D amplifier with an 18-inch high-performance woofer to deliver extended low-frequency output. With a maximum SPL of 132 dB and low-end reach down to 25 Hz, it provides the depth required for demanding PA applications. The efficient amplifier design supports consistent performance while maintaining reliable operation during extended use.
Selectable high-pass modes allow the subwoofer to integrate with compatible loudspeakers, including preset options designed for Thump series models. A variable crossover mode offers additional flexibility, enabling manual adjustment to suit different systems. Each mode includes alignment delay to maintain timing between subwoofer and main speakers.
Stereo XLR inputs allow connection to mixers, DJ controllers, and other line-level sources. Stereo high-pass outputs provide a processed signal for loudspeakers, while full-range outputs pass the unaltered signal for linking additional subwoofers. A stereo or mono summing option supports a range of system configurations.
The enclosure is built for durability and regular transport, with integrated carry handles for easier handling between venues. An M20 threaded pole mount supports speaker pole installation when required. Additional controls, including phase invert, level adjustment, and a defeatable front LED, provide practical control during setup and operation.
