Skip Navigation

Your favorite song is playing, you pull up at a stoplight, and pretty soon you've got the urge to launch an all-out drum solo on your dash — we've all been there. Maybe your drum set is imaginary, but you want the bass in your ride to be real as it gets. And that's where Pioneer's Champion Series subs come in.

Large cone for bigger bass
The TS-W309S4 12" subwoofer features a seamless, injection-molded polypropylene cone that's about 14% larger than last year's model for extended bass response. The oversized, glossy cone features the classic Pioneer logo underscored with eye-catching red script, giving this sub the unmistakable mark of a Champion. A double layered elastic polymer surround supports the woofer during cone excursion so you'll get hard-hitting bass.

A solidly built motor assembly uses a double magnet design to drive the cone hard for accurate, soul-shaking beats. So the next time you pick up those invisible drum sticks, you'll have this sub to back you up with loads of energetic, dynamic bass.

Product Highlights:

  • 12" subwoofer
  • injection molded polypropylene (IMPP) cone
  • 2-layer elastic polymer surround
  • stamped steel basket
  • power range: 50-400 watts RMS
  • peak power handling: 1,400 watts
  • frequency response: 20-220 Hz
  • sensitivity: 94 dB
  • top-mount depth: 6"
  • sealed box volume: 0.85-1.75 cubic feet
  • ported box volume: 1.25-2.0 cubic feet
  • warranty: 1 year
  • Our 60-day money-back guarantee

What's a component sub and why would I want one?

A component sub is simply a speaker that's designed to reproduce bass once it's installed in a compatible enclosure. Think about the impact of a movie soundtrack in a big theater or even in your own home HDTV setup. A component sub can add the same kind of power to the music in your car. And a car sub is not all about the boom that you hear on a street corner (although that's cool too) - you can pair a component sub with your choice of enclosure to get bass just the way you like it, from tight and punchy to fat and loose. And once you experience music in your car with a well-tuned subwoofer, you'll never go back.

Pioneer TS-W309S4 Reviews

Average Customer Review:

3 Reviews


Written by: Brandon from Gettysburg, PA on June 18, 2012

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

i have this sub in a ported box w/ a sound ordance m 1500 amp and HOLY COW! i have had it up have way it vibrated stuff off the shelf in my garage.

Pros: look sweet, good boowing sound as well as crisp and percise.

Cons: none!

Pioneer Champion Series 12s/Great bang for your buck

Written by: rell87 from Petersburg Va on June 10, 2012

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

This new model is a huge improvement over the last and sounds amazing.I have two hooked up to a Audiopipe ap1500 d and these subs bang with no issues at all.I have the gain turned all the way down and I plan on adding two more in the near future.I had two Alpine type r 12s before these and these seem to hit the bass notes a lot clearer and lows hits very nice.I. recommend these to anyone if you want great sound with a great price

Pros: Clear sound,hits lows, better yet every note well

Cons: Won't fit into every 12 inch box,but who cares great buy


Written by: Blakeh from georgia on January 26, 2012

  • "Coolness Factor"
  • Build Quality
  • Ease of Use
  • Sound Quality
  • Value

These subs hit hard. i have two in a ranger with a ported pro box and they blew my back window out something the l7 i had wouldnt do. they kill all the highs they hit so hard. all i have pushing them is a pioner 760 watt running each sub to theyre own channel. definately worth the money.

Pros: produce deep deep bass!

Cons: dnt have any cons

Hands-on research

What's in the box?

Download owner's manual

  • One 12" woofer
  • 8 Self-tapping screws (5mm x 30mm)
  • 39" Self adhesive foam gasket
  • Manual (English/ Spanish/ French)
  • Warranty sheet

Product Research



Woofer: The Pioneer Champion series TS-W309S4 features a seamless IMPP (Injection Molded Polypropylene) composite cone woofer. The surface area is approximately 14% larger than last year's model for louder and higher quality bass reproduction. This process of cone molding assures a uniform cone thickness for superior linearity and clarity. The cone is lightweight and rigid for low distortion and superior bass response.

Surround: The surround is made of dual-layer, fiber reinforced elastic polymer.

Terminals: The woofer's spring compression binding post terminals are side-by-side for easy wiring. Each post will accept a pin connector, a single banana plug, or bare wire up to 10 gauge.

Double-stacked Magnet: The TS-W309S4 uses Double-stacked High Energy magnets to create a powerful magnetic force. This increases the control exerted over the voice coil and the power transferred to the cone.


Sealed Box Volume: The sealed box sizes recommended by Pioneer range from 0.85 ft³ to 1.75 ft³; within this range the ideal size is 1.25 ft³.

Vented Box Volume: The vented box sizes recommended by Pioneer range from 1.25 ft³ to 2.0 ft³; within this range the ideal size is 1.5 ft³. The ideal port size is 3" diameter x 5.5" long with a 1.5 ft³ enclosure.

Single Reflex Bandpass Volume: The bandpass box sizes recommended by Pioneer range from 0.7 ft³ per chamber to 1.1 ft³ per chamber; within this range the ideal size is 0.9 ft³ per chamber. One 3" diameter x 4.5" long port should be used in an enclosure with 0.9 ft³ chambers.

Our Product Research Team

At Crutchfield, you'll get detailed, accurate information that's hard to find elsewhere. That's because we have our own in-house Product Research team. They verify what’s in the box, check the owner's manual, and record dimensions, features and specs. We stay on top of new products and technologies to help people make informed choices.