Yamaha YST-SW315 Powered Subwoofer – 80W, Advanced YST II, QD-Bass

The Yamaha YST-SW315 is a powered 10-inch subwoofer engineered to deliver tight, controlled bass using Yamaha’s Advanced YST II and QD-Bass technologies. Rated at 80 watts nominal with dynamic peaks up to ~270W, it provides strong low-frequency performance for both home theater and music. The down-firing woofer and sculpted QD-Bass base disperse bass smoothly across the room, while the flared side port reduces turbulence for cleaner output.

The front-mounted control panel offers convenient adjustment of volume, bass, high-cut (40–140 Hz), and standby/on functions. Finished in black ash veneer, this model is built with MDF cabinetry for reduced resonance. Manufactured by Yamaha Corporation in Indonesia, the YST-SW315 remains well-regarded for reliability and clarity, outperforming many modern budget subs and pairing well with any receiver or system using RCA/LFE inputs. 

Key Specifications
Woofer: 10-inch high-compliance cone
Power Rating: 80W nominal, ~270W dynamic
Frequency Response: 20 Hz – 160 Hz
Crossover Range: 40–140 Hz adjustable
Inputs: RCA line-level & LFE
Technologies: Advanced YST II, QD-Bass down-firing system, Linear Port
Cabinet: MDF with black ash finish
Manufacturer: Yamaha Corporation (Japan; unit made in Indonesia)
Power Requirements: 120V, 60Hz

Condition
Good, fully functional, and tested. Visible scuffs to the legs, along with typical cosmetic wear from normal handling. No issues affecting performance.

Dimensions
Approx. 17.5 x 13.75 x 15.75 inches (H x W x D).