Cabinet type and stated extension, not the number on the amplifier · review
A 12 in front-firing subwoofer with an all-digital amplifier rated at 400 W of dynamic power and a stated 29–120 Hz response — the largest driver on this shelf.
In brief
The only subwoofer here sold on Amazon.com on October 25, 2026, and the largest driver on the shelf: 12 in, front-firing, with 29–120 Hz stated. The 400 W is dynamic power, not a sustained rating, so judge it on the driver and the response. Key figures: 12 in (30.5 cm) front-firing driver · all-digital amplifier · 400 W dynamic power · 29–120 Hz stated. Amazon.com had an offer at $259 on October 25, 2026. Our score: 8.7/10, specification-checked.
Air. A larger cone moves more of it for the same excursion, so it reaches a given level with less distortion. That is heard as effortlessness rather than as depth, and it is the practical difference between a big subwoofer and a small one playing loudly. The R-12SW’s woofer is 12 in, copper-spun and front-firing — it faces the room, so it can sit with its back to a wall.
400 W of dynamic power is a peak figure: what the amplifier delivers briefly, not what it holds. Klipsch publishes no sustained rating here. The 29–120 Hz response is more useful: it says the driver is meant to reach the bottom octave, though without a tolerance it does not say how loud it still plays at 29 Hz.
Line and LFE inputs: on a receiver, run one cable from the subwoofer (LFE) output; with a stereo amplifier, use the line input and the R-12SW’s own low-pass crossover. The phase control lines the subwoofer up with the main speakers at the crossover.
Room modes decide what arrives at your seat, and moving a subwoofer three feet changes that more than replacing it does. Try the corner, the front wall and beside the seating with the same passage each time.
Set the crossover where the main speakers stop, not where the subwoofer can reach — usually around 80 Hz with a receiver. Handing frequencies to the subwoofer that the main speakers handle well is what makes a system sound heavy rather than deep.
Amazon.com had an offer at $259 on October 25, 2026. It was the only subwoofer on this shelf on offer there that day.
Prices quoted in this text were read on October 25, 2026. The live price is at the top of the page.
Amazon.com lists this model (ASIN B00MJ1YR8Y) and had an offer at $259 on October 25, 2026. The price box on this page is refreshed live and takes precedence over that figure.
| Driver | 12 in (30.5 cm) copper-spun woofer, front-firing — stated |
|---|---|
| Amplifier | All-digital — stated |
| Power | 400 W dynamic power — stated as dynamic, not as a sustained or RMS figure |
| Frequency response | 29–120 Hz — stated in the description, without a tolerance |
| Controls | Low-pass crossover and phase control — stated |
| Inputs | Line and LFE — stated, for compatibility with most receivers |
| Cabinet | Brushed black polymer veneer with a satin painted plinth — stated |
| Amazon reference | DE B0B5RMLFF4 · US B00MJ1YR8Y · GB B00MJ1YR8Y · FR B00MJ1YR8Y · IT B00MJ1YR8Y · ES B00MJ1YR8Y |
| EAN | 0743878026153 |
No. The Amazon.com listing linked from this page is the R-12SW: a 12 in front-firing subwoofer rated at 400 W of dynamic power, with a stated 29–120 Hz response. Klipsch has sold other 12 in models in its Reference range; check the model number on the listing before you order.
A short-term figure: the power the amplifier can deliver in brief peaks, not what it sustains. Klipsch does not publish a sustained or RMS rating in this listing, so it cannot be set directly against a subwoofer that does.
Klipsch states a frequency response of 29 to 120 Hz. The low end of a film's effects channel sits between about 20 and 40 Hz, so 29 Hz reaches most of it; without a tolerance, the figure says where the response is, not how much output is left at 29 Hz.
With almost any. It takes a line or LFE input — the LFE is the subwoofer output on a home theater receiver — and has its own low-pass crossover and phase control for use with a stereo amplifier.
8.7/ 10
The only subwoofer here sold on Amazon.com on October 25, 2026, and the largest driver on the shelf: 12 in, front-firing, with 29–120 Hz stated. The 400 W is dynamic power, not a sustained rating, so judge it on the driver and the response.
A living room where the subwoofer has to keep up with films — and a receiver with an LFE output to feed it.
Amazon reports what buyers took in the month before this page was last checked: at least 400.
The figure is a floor, rounded by Amazon, and read through Keepa — it says what buyers picked, not what a maker claims.
Specifications: the manufacturer sheet and the matching Amazon product page. Prices and availability: Keepa. Every figure on this page names its source.
Active · 60/120 W stated as a pair · sold singly
A German-made active subwoofer quoted conservatively — 60/120 W — in the two-figure form that makes a rating comparable rather than impressive.
Best for: A small or medium room, and a system built from components rather than bought as a package.
No Amazon.com offer on Oct 25, 2026
8-inch driver · 70 W · low-pass filter · down to 35 Hz stated · MDF cabinet · RCA · standby
The best-specified subwoofer in this catalog: it publishes a frequency extension figure — 35 Hz — which nothing else here does.
Best for: A small to medium room, and anyone who wants to compare a published number rather than infer from a driver size.
No Amazon.com offer on Oct 25, 2026
Active · 150 W · front-firing or downfiring · sealed or ported not stated
A subwoofer that can be oriented front-firing or downfiring — a placement flexibility that matters more in a real room than a specification does.
Best for: A room where the subwoofer has to go under or beside furniture, and orientation decides whether it works there.
No Amazon.com offer on Oct 25, 2026
