Klipsch R-121SW
Reference series
The Klipsch R-121SW is a powered subwoofer with a 200 W amplifier and a 12-inch driver, rated down to 28 Hz. It connects to all 26 receivers and processors in our catalogue.
$650 each (MSRP, September 2026)
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Which receivers connect to it?
It takes a line-level input, so any receiver or processor with a subwoofer output can feed it.
- Connects
Receivers and processors with a subwoofer output
26 in our catalogue
In its price range
Denon AVR-S670H
$649 · 5 amplified channels · 75 W at 8 Ω
Connects
Denon AVR-X1700H
$649 · 7 amplified channels · 80 W at 8 Ω
Connects
Yamaha RX500A
$600 · 7 amplified channels · 70 W at 8 Ω
Connects
Denon AVR-S770H
$749 · 7 amplified channels · 75 W at 8 Ω
Connects
Onkyo TX-NR6100
$799 · 7 amplified channels · 100 W at 8 Ω
Connects
Yamaha RX-V6A
$800 · 7 amplified channels · 100 W at 8 Ω
Connects
All 26 receivers and processors we checked
Connects26
- Denon AVR-S570BT
5 amplified channels · 70 W at 8 Ω
- Yamaha RX500A
7 amplified channels · 70 W at 8 Ω
- Denon AVR-S670H
5 amplified channels · 75 W at 8 Ω
- Denon AVR-X1700H
7 amplified channels · 80 W at 8 Ω
- Denon AVR-S770H
7 amplified channels · 75 W at 8 Ω
- Onkyo TX-NR6100
7 amplified channels · 100 W at 8 Ω
- Yamaha RX-V6A
7 amplified channels · 100 W at 8 Ω
- Denon AVR-X1800H
7 amplified channels · 80 W at 8 Ω
- Denon AVR-S970H
7 amplified channels · 90 W at 8 Ω
- Onkyo TX-RZ30
9 amplified channels · 100 W at 8 Ω
- Pioneer VSX-LX305
9 amplified channels · 100 W at 8 Ω
- Onkyo TX-NR7100
9 amplified channels · 100 W at 8 Ω
- Marantz Cinema 70s
7 amplified channels · 50 W at 8 Ω
- Denon AVR-X2900H
7 amplified channels · 95 W at 8 Ω
- Pioneer VSX-LX505
9 amplified channels · 120 W at 8 Ω
- Onkyo TX-RZ50
9 amplified channels · 120 W at 8 Ω
- Denon AVR-X3800H
9 amplified channels · 105 W at 8 Ω
- Denon AVR-X3900H
9 amplified channels · 105 W at 8 Ω
- Marantz AV7706
11 channels, no amplifiers · Dolby Atmos
- Denon AVR-X4800H
9 amplified channels · 125 W at 8 Ω
- Marantz Cinema 50
9 amplified channels · 110 W at 8 Ω
- Denon AVR-X6800H
11 amplified channels · 140 W at 8 Ω
- Anthem AVM 70 8K
15 channels, no amplifiers · Dolby Atmos
- Monoprice HTP-1
15 channels, no amplifiers · Dolby Atmos
- Emotiva RMC-1L
15 channels, no amplifiers · Dolby Atmos
- Marantz AV 10
15 channels, no amplifiers · Dolby Atmos
Plan your room around the R-121SW.
Draw your room in 3D, place the R-121SW and see where its bass lands at your seat before you buy. Designing is free.
R-121SW specifications
- Amplifier
- 200 W
- Drivers
- 1 × 305 mm
- Low end
- 28 Hz
- Inputs
- Line
- Size
- 16×17×20 in
- Weight
- 16 kg (35.3 lb)
- MSRP
- $650 each (MSRP, September 2026)
Every value comes from the sources under References, last retrieved September 15, 2026. To check it against the rest of your system, use the compatibility checker.
Questions about the R-121SW
- What receiver works with the R-121SW?
- Any receiver or processor with a subwoofer output. In our catalogue that includes Denon AVR-S570BT, Yamaha RX500A and Denon AVR-S670H.
- How powerful is the R-121SW?
- The Klipsch R-121SW has a 200 W continuous amplifier.
- How low does the R-121SW go?
- The Klipsch R-121SW is rated down to 28 Hz. In a room, modes can lift or cancel bass by more than 10 dB, so placement matters as much as the rating.
- Does the R-121SW have speaker-level inputs?
- No. It connects with a line-level (RCA or LFE) input only.
- How big is the R-121SW?
- The Klipsch R-121SW measures 406 × 421 × 500 mm (16 × 16.6 × 19.7 in, width × height × depth) and weighs 16 kg (35.3 lb).
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References
Brand names are trademarks of their owners. Not affiliated with or endorsed by any manufacturer. 3D models are our approximations. Prices are manufacturer list prices (MSRP) as of the month shown. How we earn from buy links: affiliate disclosure.