Yamaha SW-3 Active Servo Subwoofer — 10" Woofer | Air Woofer Tec - Image 1

Yamaha SW-3 Active Servo Subwoofer — 10" Woofer | Air Woofer Tec - Image 2

Yamaha SW-3 Active Servo Subwoofer — 10" Woofer | Air Woofer Tec

Yamaha SW-3 Active Servo Subwoofer — 10" Woofer | Air Woofer Tec - Image 3

Yamaha

Yamaha SW-3 Active Servo Subwoofer — 10″ Woofer | Air Woofer Tec

Name: Yamaha SW-3 Active Servo Subwoofer — 10" Woofer | Air Woofer Tec
Brand: Yamaha
SKU: 14963
Price: 225.00 CAD
Availability: InStock

$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.

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Description

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.

$225.00

Additional information

Weight	40.3 lbs
Dimensions	19.2 × 18.5 × 22.1 in

About brand

Yamaha at Radique

We service Yamaha, too. Bring us your own Yamaha receivers, amplifiers, CD players, cassette decks, speakers and subwoofers for repair, servicing or restoration, with a 90-day warranty on the work. See our Audio Service page

Yamaha began as an organ maker in Hamamatsu, Japan, in 1887. It made gramophones from the 1920s and began hi-fi with the 1954 HiFi Player. We carry Yamaha AV receivers, vintage stereo receivers, CD players, subwoofers and speakers. We've had more than 280 Yamaha listings so far, covering nearly 200 different models. Every used Yamaha here is inspected, tested and serviced as required, then photographed in-house and covered by our Bumper-to-Bumper Warranty and Perpetual Trade-Back Program. Every AV receiver we list is tested input by input on our bench: each HDMI input and output, the analog, optical and coaxial inputs, the subwoofer outputs and the wireless features where it has them. Don't see the model you want? Tell us on First Dibs and we'll email you when one arrives.

Yamaha models we've sold most often: the SW-3 subwoofer, the NX-E270 surrounds, and the RX-V1400, RX-V850 and RX-V800 AV receivers.

The Yamaha hi-fi story

Torakusu Yamaha built his first reed organ in Hamamatsu in 1887 and founded Nippon Gakki in 1897; the company was renamed Yamaha Corporation in 1987. Yamaha calls the 1954 HiFi Player its first audio product, and dates its first Natural Sound (NS) speakers to 1967.

1970s hi-fi. The CA-700 and CA-500 of 1972 were Yamaha's first integrated amplifiers, and the CA-1000 of 1973 could switch its output stage between Class A and Class A/B. The NS-1000 and NS-1000M speakers of 1974 used beryllium dome drivers, and the NS-10M of 1978, sold for home use, became a studio monitor.

CD and surround. The CD-1 of 1982 was Yamaha's first CD player. The DSP-1 of 1986 was a Digital Sound Field Processor, and in 1993 the RX-V870 became the first Yamaha receiver with CINEMA DSP. The RX-V992 of 1997 added built-in Dolby Digital decoding.

AVENTAGE. The AVENTAGE (RX-A) receiver line launched in 2010, above the RX-V range.

Which Yamaha is which?

CA integrated amplifiers (1972 to about 1979): the CA-500, CA-700, CA-1000 and CA-2000, followed by the A-series.

CR receivers (mid-1970s to about 1980): the CR-1000, then the CR-620 to CR-2020 generation of 1977 to 1979.

NS speakers: from the NS-690 and the beryllium NS-1000 to the NS-10M bookshelf speaker, made from 1978 to 2001.

CD players: from the CD-1 of 1982 to the CDX and GT-CD models.

RX-V AV receivers (from at least 1991): such as the RX-V800, RX-V850 and RX-V1400 we sell often. Built-in Dolby Digital arrived in 1997, YPAO room calibration in 2003 and HDMI in the mid-2000s.

RX-A AVENTAGE (from 2010): the step-up AV receivers. The RX-Z models were the flagships until 2007.

Buying used Yamaha: what to check

Formats. On an AV receiver, check what it decodes and connects to: Dolby Digital from 1997, room calibration from 2003, HDMI from the mid-2000s.

HDMI boards. On modern AV receivers, HDMI is usually the first thing to fail. We test every HDMI input and output before listing.

CR receivers. Owners suggest asking whether service bulletins were done on a CR-2020, and expect scratchy controls and burnt-out dial lamps on any unserviced unit.

NS speakers. Check that the tweeters on an NS-10M are original and both work, and inspect the beryllium domes on an NS-1000, since Yamaha stopped making beryllium diaphragms in 1997.

Everything we list is inspected, tested and serviced as required here, and comes with our warranty.