Yamaha SW-3 Active Servo Subwoofer — 10″ Woofer | Air Woofer Tec
$225.00
Yamaha’s Active Servo Technology couples a negative-impedance drive amplifier to a Helmholtz resonator port — the Air Woofer opening — so the amplifier corrects the driver’s motion as it works. 100 watts into a 25 cm cone, rated down to 25 Hz, with a continuously variable 50–150 Hz high-cut at 24 dB per octave. Speaker-level and line inputs both. Very good condition.
1 in stock
The Yamaha SW-3 is a serious, beefy powered subwoofer built around Yamaha’s proprietary Active Servo Technology — a genuinely clever amplifier-and-speaker feedback system that delivers deep, accurate bass well below what a conventional subwoofer of similar size can achieve.
Active Servo Technology works by coupling a negative-impedance output drive amplifier with a Helmholtz resonator port design — the “Air Woofer” opening in the cabinet. The amplifier continuously monitors and corrects the driver’s motion, reducing distortion and extending low-frequency linearity well beyond the driver’s unassisted capability. The result is tight, controlled bass that integrates naturally with main speakers rather than the bloated, one-note bass that plagues lesser subwoofers. Yamaha rated the SW-3’s frequency response down to 25 Hz (-10 dB) — genuinely deep extension for a sub of this era and price class.
The 100-watt amplifier drives a 25cm (9-13/16″) cone woofer in a solidly built, substantial cabinet. Controls are practical and well-considered: a continuously variable high-cut filter (50–150 Hz at 24 dB/octave) allows precise blending with virtually any main speaker system, an independent volume control sets the level balance, and an Auto Power On/Off function senses incoming signal and powers the sub up and down accordingly. Both speaker-level (Input 1) and line-level (Input 2) inputs are provided, along with speaker-level output pass-through terminals for connecting main speakers — making the SW-3 compatible with nearly any amplifier or receiver regardless of whether a dedicated subwoofer output is available.
This unit is in very good condition and has been thoroughly inspected and tested to confirm full functionality.
Type: Active Servo Processing powered subwoofer
Driver: 25cm (9-13/16″) cone woofer
Amplifier output: 100W (5Ω)
Frequency response: 25 Hz – 200 Hz (-10 dB)
High-cut filter: 50–150 Hz, 24 dB/octave (continuously variable)
Inputs: Speaker-level (Input 1, 4.7kΩ); line-level RCA (Input 2, 10kΩ)
Output: Speaker-level pass-through terminals
Auto Power On/Off: Yes
Power consumption: 130W
Dimensions: (Width x Height x Depth) 14.5 x 18.1 x 15.2 inches (368 x 460 x 386 mm)
Weight: 38.3 lbs (17.4 kg)
A capable, well-engineered powered subwoofer in very good condition — Yamaha’s Active Servo Technology delivers genuinely deep, controlled bass that punches well above this sub’s modest footprint.
Backed by Radique Audio’s Bumper-to-Bumper Warranty and our Perpetual Trade-Back Program, you can purchase with confidence.
| Weight | 40.3 lbs |
|---|---|
| Dimensions | 19.2 × 18.5 × 22.1 in |
Related Products
Polk Audio PSW350 10″ Front-Firing Powered Subwoofer 260W
A 10-inch front-firing Dynamic Balance woofer on a 100-watt RMS amplifier — 260 watts dynamic — in a dual-rear-ported cabinet good for 25 to 180 Hz. Speaker-level in and out, stereo line inputs and an unfiltered LFE jack, with a variable 60 to 160 Hz low-pass and a phase switch. 37 lbs, black matte. Very good cosmetic condition.
Yamaha YST-SW105 Active Servo Subwoofer — Compact 100W
An 8-inch front-firing paper cone on Yamaha's Advanced Active Servo amplifier — 100 watts into 5 ohms, down to 30 Hz, from a cabinet small enough to tuck beside a bookshelf pair. Continuously variable high-cut from 50 to 150 Hz, a Music/Movie voicing switch, RCA and speaker-level inputs plus full-range pass-through outputs. Very good condition.
Mirage LF-150 10″ Powered Subwoofer – 600W Peak, Made in Canada
A discrete MOSFET Class A/B amplifier rated 150 watts continuous and 600 watts dynamic peak, driving a 10-inch polypropylene titanium-deposit woofer on a 1.5-inch voice coil and a 28-ounce magnet. Front-ported to 23 Hz, with level, phase and crossover on the front panel instead of the back. Made in Canada, 45 lbs; very good condition.
JVC SX-PW33 Slim Tower Subwoofer — 6.5in, 100W, High-Pass Out
Infinity Minuette MPS Passive Subwoofer – Dual 6.5″, Front-Ported
A passive subwoofer, which means no power cord, no built-in amplifier and no electronic crossover to fail. Two 6.5-inch polypropylene woofers in a bandpass box, 40 to 150Hz, wired high-level — your amplifier's front outputs go in, your main speakers come off the pass-through, and the sub keeps everything below about 150Hz. Twenty-eight pounds of moulded composite. Very good condition.
LG SH96TA-W Passive Subwoofer, Front-Firing, Front-Ported, Black
The passive subwoofer that shipped with LG's SH96TA home-theatre system — forward-firing driver and a front port, so it can back onto a wall or sit inside a cabinet without upsetting the tuning. It is a 3-ohm load and needs a receiver with a dedicated passive-subwoofer output; it should not go on ordinary speaker terminals. No power cord, no plate amp to age out. Good cosmetic condition.
