Klipsch R-121SW
Powered subwoofer · Reference series
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The Klipsch R-121SW is a powered subwoofer with a 200 W amplifier and a 12-inch driver, rated down to 28 Hz. It has line-level inputs; all 26 receivers and processors in our catalogue connect to it.
$650 each (MSRP, September 2026)
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Receivers and processors for the R-121SW
Each pairing is checked by our compatibility engine against the subwoofer's inputs and the unit's subwoofer outputs.
Connects (26)
- 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
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
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