Martin Audio Blackline S218+
Martin Audio Blackline S218+ is a dual-driver vented subwoofer in the Blackline+ family. The manufacturer’s datasheet identifies two 18-inch low-frequency drivers in a cabinet designed for the bass range of a sound reinforcement system.
The S218+ designation matters when consulting documentation: this listing is for the plus-series model supplied in the inventory, rather than an unqualified S218 or a later SX model. Its passive subwoofer role calls for the appropriate external amplifier and processing arrangement. Those system components are separate from the named cabinet and are not added to the description of the offered unit.
Model overview
- Blackline+ dual-18-inch subwoofer design.
- Vented low-frequency enclosure.
- Exact model is S218+, retaining the plus suffix.
S218+: a dual-driver low-frequency enclosure
The Blackline S218+ uses a dual-18-inch vented design. That physical format should be considered alongside the intended low-frequency role and the available deployment space. Two drivers in an enclosure describe its construction; they do not establish that the quantity field represents a pair of cabinets or that a system package is being offered.
The plus suffix is part of the model identity. For an older or mixed Blackline inventory, use the exact S218+ datasheet rather than treating an S218 or another Blackline subwoofer as the same technical reference. Amplifier, processing and placement choices should follow the actual cabinet and the proposed system design.
Condition and unit price
Martin Audio Blackline S218+ is offered in Excellent condition. Available stock: 8 units. The price is €600 per unit; the stock count is the available quantity and does not describe a package or combined price.
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