Dolby CS218XL – SLS Dual 18-Inch Cinema Subwoofer
Dolby CS218XL – SLS Dual 18-Inch Cinema Subwoofer is backordered and will ship as soon as it is back in stock.
Dolby CS218XL – SLS Dual 18-Inch Cinema Subwoofer
What is the Dolby SLS CS218XL?
The SLS CS218XL is a dual 18-inch cinema subwoofer module from Dolby's SLS line. It is a high-performance, front-loaded, vented box design with maximized low-frequency extension for cinema systems' extreme low-frequency support. Its two 18-inch drivers use large magnet structures and high-temperature voice coils rated at 600 W RMS each.
How does the Dolby SLS CS218XL work?
The CS218XL is a passive, ported subwoofer driven by an external amplifier channel at a 4-ohm nominal impedance. The front-loaded driver arrangement gives high sensitivity, rated at 102 dB (1 W @ 1 m), and the vented cabinet extends response down to 29 Hz with an operating range of 29 Hz to 300 Hz.
Power handling is 1200 W (69 V) AES/2, and calculated maximum output is 133 dB continuous and 139 dB peak at one metre. The cabinet is built from 13-ply 3/4-inch Baltic birch with extensive internal bracing, finished in flat black latex, and accepts wiring on a barrier strip input.
Dolby publishes processor settings for the CS218XL so it integrates with Dolby cinema processors such as the CP950A and CP950. A Dolby Multichannel Amplifier such as the DMA16302 is a typical amplifier choice.
What are the key features of the Dolby SLS CS218XL?
- Front-loaded ported design — high sensitivity with extended low-frequency response.
- Two 600 W RMS 18-inch drivers — large magnet structures and high-temperature voice coils.
- 13-ply Baltic birch cabinet — 3/4-inch construction with extensive internal bracing.
- 1200 W AES power handling — 133 dB continuous and 139 dB peak calculated output.
- Barrier strip input — straightforward field wiring.
Where is the Dolby SLS CS218XL typically used?
- Cinema auditorium
- Screening room
- Auditorium
- House of worship
Technical Specifications
| Model | SLS CS218XL |
| Operating range | 29 Hz to 300 Hz |
| Sensitivity (1 W @ 1 m) | 102 dB |
| Power handling | 1200 W (69 V) AES/2 |
| Max SPL (calculated) @ 1 m | 133 dB continuous / 139 dB peak |
| Nominal impedance | 4 Ohms |
| Transducers | 18" woofer x 2 (600 W RMS each) |
| Input | Barrier strip |
| Enclosure | 13-ply Baltic birch |
| Finish | Flat black latex |
| Dimensions | 48" x 30" x 25.2" (122 x 76 x 64 cm) |
| Net weight | 148 lb (67.13 kg) |
| Shipping weight | 175 lb (79.4 kg) |
Frequently Asked Questions
Is the CS218XL compatible with Dolby Atmos and the CP950A?
Yes. It provides extreme low-frequency support for cinema systems and integrates with Dolby processors such as the CP950A using Dolby's published CS218XL processor settings.
What amplifier does it need?
The CS218XL is passive with a 4-ohm nominal impedance and 1200 W (69 V) AES/2 power handling. Creation Networks sizes Dolby Multichannel Amplifier channels during design.
Is the CS218XL a Dolby product?
Yes. SLS Audio cinema products are part of the Dolby Professional cinema line, and the CS218XL is listed on Dolby's cinema audio product pages.
How large is the cabinet?
It measures 48 x 30 x 25.2 inches (122 x 76 x 64 cm) and weighs 148 lb, so plan floor space and handling accordingly.
What warranty and support are available?
The CS218XL carries Dolby's manufacturer warranty, confirmed with your quote. Creation Networks designs, installs and tunes Dolby cinema systems; see the Dolby Professional collection and request a quote.
At Creation Networks, we do everything we can to create an excellent customer experience. This includes fast shipping and easy returns.
- Most in-stock orders placed Monday-Friday ship within 24-48 hours. General restrictions apply; please see our full shipping policy here.
- We offer a 30-day return policy from the delivery date on many products. Product restrictions apply. Restocking fees for the return of open-box items. Please see our full return policy here for more information.
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