Yamaha YST-SW105 Active Servo Subwoofer — Compact 100W

Don’t let the modest footprint fool you — the Yamaha YST-SW105 is a genuinely capable compact powered subwoofer that consistently surprises with the quality and depth of bass it delivers from a cabinet small enough to tuck discreetly beside almost any speaker system.

The YST-SW105 is built around Yamaha’s Advanced Active Servo Technology — a proprietary feedback system that couples the amplifier and driver in a continuous correction loop, reducing distortion and extending low-frequency linearity well beyond what a conventional subwoofer of this size could achieve passively. The 20cm (8″) front-firing paper cone woofer and front-firing bass reflex port are tuned to work with the servo amplifier as a complete system, producing clean, musical bass down to 30 Hz that integrates naturally with compact satellite and bookshelf speakers. A B.A.S.S. (Bass Action Selector System) switch lets you optimize the sub’s voicing between Music and Movie modes, and the continuously variable high-cut filter (50–150 Hz at 24 dB/octave) makes dialling in the crossover point with your main speakers straightforward.

Connection flexibility is excellent for a sub of this class: both preamp-level RCA inputs and speaker-level inputs (banana plug compatible) are provided on the rear, along with full-range speaker-level output pass-through terminals — meaning the YST-SW105 can be integrated into any system regardless of whether a dedicated subwoofer output is available on the amplifier or receiver. Automatic standby (with adjustable Low/High sensitivity) powers the sub down when no signal is present and wakes it instantly when you start listening.

This unit is in very good condition and has been thoroughly inspected and tested to confirm full functionality.

Type: Advanced Yamaha Active Servo Technology bass reflex powered subwoofer
Driver: 20cm (8″) front-firing paper cone woofer
Amplifier output: 100W (5Ω)
Frequency response: 30 Hz – 200 Hz
High-cut filter: 50–150 Hz, 24 dB/octave (continuously variable)
B.A.S.S. switch: Music / Movie modes
Inputs: Preamp-level RCA (L/R); speaker-level (banana plug compatible)
Outputs: Speaker-level pass-through (full range, banana plug compatible)
Auto standby: Yes — Off / Low / High sensitivity settings
Magnetic shielding: Yes
Power consumption: 80W (0.8W standby)

Dimensions: (Width x Height x Depth) 9.3 x 14.4 x 12.3 inches (235 x 365 x 312 mm)
Weight: 20.9 lbs (9.5 kg)

An excellent-sounding compact powered subwoofer — Yamaha’s Active Servo Technology delivers surprisingly deep, well-controlled bass from a cabinet that fits almost anywhere.

Backed by Radique Audio’s Bumper-to-Bumper Warranty and our Perpetual Trade-Back Program, you can purchase with confidence.