Seaton Sound F-18+ & F-18 Slave Set of Subwoofers in Black EXCELLENT

Seaton Sound F-18+ & F-18 Slave Set of Subwoofers in Black - EXCELLENT Condition

Item Description:

For sale is a rare and highly sought-after Seaton Sound F-18+ Master + F-18 Slave dual subwoofer system in beautiful black ash finish. This is the legendary setup that has been praised by audiophiles and home theater enthusiasts as one of the very best high-output, musical subwoofers ever made.

Mark Seaton’s F-18 series is renowned for delivering effortless, chest-slamning bass with incredible speed, accuracy, and extension that rivals (and often exceeds) much more expensive commercial and servo subs. The F-18+ is the powered master unit with built-in 2400W Bash amplifier and full DSP control, while the matched F-18 Slave adds another massive 18” driver for truly reference-level performance.

Both subwoofers are in excellent cosmetic and fully functional condition – no scratches, dents, grilles are perfect, drivers are flawless. Used in a smoke-free, pet-free, adult home theater. Always treated with care.

This exact configuration (F-18+ master + slave) is extremely hard to find used, as most owners refuse to part with them.

Key Features & Specifications:

• Model: Seaton Sound F-18+ (Master) + F-18 (Slave)
• Driver: Dual 18″ high-excursion custom drivers (one powered, one passive/slave)
• Amplifier: 2400 Watt BASH amplifier with full DSP (F-18+ only)
• Frequency Response: Usable output down to the low teens (10–14 Hz in-room typical)
• Finish: Black ash vinyl – clean and classy
• Grilles: Included and in perfect condition
• Connectivity: RCA and XLR inputs, daisy-chain outputs for slave
• Dimensions (each): ~24″ W × 24″ D × 36″ H (approximate)
• Weight (each): Approximately 140–150 lbs
• Condition: Excellent – 9.5/10 cosmetically, 100% functionally
• Made in USA – hand-built by Mark Seaton in Chicago

If you know Seaton Sound, you already know these are end-game subwoofers for most people. Tight, fast, ridiculously deep, and capable of shaking the foundation when called upon.

We do take trade-ins, so please contact us if you wish to do so.

Please make sure to thoroughly inspect item photos for cosmetic condition.  We do try to describe the item as accurately as possible, so if you have any questions about cosmetic condition please message us.