Optimal Audio Sub 18 High-power 18″ sub-bass loudspeaker
฿ 55,000
or pay just ฿ 5,500
per month at
0% interest
Installment Details
×Choose your installment plan on the payment page during checkout!
| Bank | Interest % | Period | Monthly |
|---|---|---|---|
| Bangkok Bank Cards (BBL) | 0% | Up to 10 months | ฿ 5,500 |
| KBank Cards (Kasikorn Thai) | 0% | Up to 10 months | ฿ 5,500 |
| Krungsri Cards (BAY) | 0% | Up to 10 months | ฿ 5,500 |
| Krungsri First Choice Cards (KFC) | 0% | Up to 10 months | ฿ 5,500 |
| Krung Thai Cards (KTC) | 0% | Up to 10 months | ฿ 5,500 |
| SCB Cards (Siam Commercial/CardX) | 0% | Up to 10 months | ฿ 5,500 |
| TTB Cards | 0% | Up to 10 months | ฿ 5,500 |
In stock
In stock
Delivery information
ProPlugin delivers your parcels through Thailand Post. All parcels are shipped through Thailand Post's EMS Service to ensure fast delivery options!
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Delivery within Thailand |
|
|---|---|
|
Bangkok metropolitan area |
Delivery within 1 business day |
|
Chiang Mai province |
Delivery within 2 business days |
|
Remote areas |
Delivery within 3 business days |
|
All other destinations within Thailand |
Delivery within 1 business day |
*Shipping times apply if ordered before 12.00 noon (add 1 business day if ordered after 12.00 noon)
Returns policy
Your satisfaction is important to us. If you've changed your mind about your order, you may request a return within 15 days of receiving your order! If you wish to initiate a return, please contact our customer support team.
Please note that the product must be unopened/sealed, and some exclusions apply, for example on software. Please carefully read our full returns & refund policy.
Warranty coverage
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Most of our products come with a standard 1-year warranty covering manufacturer defects and electronic malfunctions under normal usage.
If a product is under warranty, we provide free repairs at our repairs centre for music equipment in Bangkok. If the product broke within 15 days after your purchase, we'll provide you with a brand new product.
If you wish to initiate a warranty claim, please contact our customer support team.
Additionally, you read our full warranty policy.
Payment & installments
Orders from 3000 THB are eligible for payment in up to 10 installments.
Installments are currently only supported for customers that use a Thai-issued creditcard from select Thai banks.
You can select your preferred installment option during your payment.
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Key Highlights
Massive 18″ driver delivers impactful sub-bass and up to 136 dB peak SPL
High power ratings: 800 W (AES) continuous, 3,200 W peak
Compact bass-reflex plywood enclosure for space-efficient performance
Rugged protective grille plus M8 fittings for ground or flown setups
Seamlessly integrates into Zone + WebApp control ecosystem
Optimal Audio Sub 18 High-power 18″ sub-bass loudspeaker
The Optimal Audio Sub 18 is a powerful passive 18″ sub-bass loudspeaker engineered for applications requiring impactful low-frequency performance. It features a compact plywood bass-reflex cabinet, delivers bass down to 42 Hz (±3 dB), and reaches a peak SPL of 136 dB. Rated at 800 W (AES) and 3200 W peak, with a steel grille for protection and integral M8 fittings for secure ground or flown installation.
Sub 18 is a powerful, high-performance, passive, 18” subwoofer designed for applications that call for increased impact and low frequency performance across the Optimal Audio loudspeaker range.
The 18” (460mm) driver is loaded into a plywood bass-reflex cabinet that maximises performance, with a peak SPL of 136dB, while taking up minimal space. Sub 18 can be used on the ground or flown using integral M8 inserts.
An impact-resistant perforated steel grille protects the driver, and rubber feet on the base resist movement. The Sub 18 enclosure is constructed from plywood and finished in black textured paint.
When teamed with Zone and WebApp, system set up and end user control is simple and intuitive, and can be further supplemented by ZonePad wall controllers.
Specifications
| Parameter | Details |
|---|---|
| Type | Sub-bass loudspeaker |
| Frequency Response (with preset) | 42 Hz – 150 Hz ±3 dB –10 dB @ 36 Hz |
| Drivers | LF: 18″ (460 mm) |
| Rated Power | 800 W (AES) / 3200 W (Peak) |
| Nominal Impedance | 8 Ω |
| Sensitivity (1W/1m) | 101 dB (Half Space) |
| Maximum SPL | 130 dB (continuous) / 136 dB (peak) (Half Space) |
| Enclosure | Plywood |
| Finish | Black textured paint |
| Protective Grille | Perforated steel |
| Connectors | Euroblock type |
| Pin Connections (Input) | 4-pin Euroblock with link out |
| Fittings | 12 × M8 inset bolts |
| Dimensions (W × H × D) | 756 mm × 530 mm × 544 mm 29.76″ × 20.86″ × 21.42″ |
| Weight | 47.0 kg (103.6 lbs) |
Who is it for?
Perfect for venues needing deep-impact low-end — cafés, bars, fitness studios, hotels, houses of worship, wedding venues, event spaces
Ideal when powerful bass is required in a space-saving design
Integrates seamlessly with zoning systems and WebApp control workflow
Installation flexibility — floor or flown, built for robust deployment
Free next day delivery on orders above 500 THB*
Warranty protection for products
Pay in interest-free installments
Always providing service with a smile
Warranty
Unable to retrieve warranty information
We've got you covered!
- Repairs centre for music equipment in Bangkok
- Free repairs if covered by warranty
- Check your warranty status at any time in your account
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Free next day delivery on orders above 500 THB*
Warranty protection for products
Pay in interest-free installments
Always providing service with a smile
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Optimal Audio Sub 18 High-power 18″ sub-bass loudspeaker
฿ 55,000
Free next day delivery on orders above 500 THB*
Warranty protection for products
Pay in interest-free installments
Always providing service with a smile
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