What are the differences between this and the 120sw?

The R-121SW has an updated woofer driver and a larger batter braced cabinet. It is able to produce a bit more bass and sound tighter.

When in auto position the led green light remains on even when the amp is off. is this normal?

The subwoofer should shut off after about 15 minutes of no signal from the amp so it will not happen right as you shut the amp off. If the sub is still not going on standby, there may be some noise coming from the amp or wiring between the amp and subwoofer that is keeping the sub from going to sleep. Reach out to our support team through our website if you need further support.

Can you use a wireless kit with this sub

You can use a 3rd party wireless kit that will connect using rca connections on the back of the sub. We do not make a wireless kit that will work with this subwoofer here. Thank you.

The product description and information say that this sub is wireless. How does it receive the signal from the receiver? Is there a transmitter, also?

This subwoofer has no wireless function, looks like this is just a error in the listing description. This sub only has RCA wired inputs.

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🎶 Feel the bass, own the room — Klipsch R-121SW delivers power you can’t ignore!

VERSATILE PLACEMENT - Compact 12" driver design adapts seamlessly to any room layout or home theater setup.
SEAMLESS INTEGRATION - Perfectly complements TVs, smartphones, and tablets for immersive audio experiences.
POWER MEETS EFFICIENCY - Built-in all-digital Class D amplifier ensures maximum power with minimal energy waste.
SLEEK MODERN AESTHETIC - Matte black finish blends effortlessly with contemporary home decor.
DEEP DISTORTION FREE BASS - TCP woofer delivers punchy, crystal-clear low frequencies that fill your space.

The Klipsch Reference R-121SW is a 12-inch active subwoofer featuring a lightweight yet durable Thermoformed Crystalline Polymer woofer and a high-efficiency all-digital Class D amplifier delivering 200 watts of distortion-free bass. Designed for versatile home theater setups, it offers deep, powerful low-end sound with a sleek black finish and compact dimensions, perfect for enhancing audio from TVs, smartphones, and tablets.

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10542.89 DT

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Trustpilot

TrustScore 4.5 | 7,300+ reviews

Ali H.

Fast shipping and excellent packaging. The Leatherman tool feels very premium and sturdy.

1 day ago

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Very impressed with the quality and fast delivery. Will shop here again.

4 days ago

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Recommended Uses For Product	For Televisions, For Smartphones or Tablets
Subwoofer Diameter	30.48 Centimeters
Color	Black
Included Components	-----
Product Dimensions	50D x 40.6W x 42.1H cm
Item Weight	15.51 kg
Is Waterproof	False
Warranty Type	1 year manufacturer warranty
Item model number	R-121SW
Color Name	Black
Speaker Amplification Type	Active
Output Wattage	200 Watts
Wattage	200 W

Klipsch Reference R-121SW / Klipsch / Reference / Subwoofer / Black / Subwoofer / Built-in Amplifier / Class D / 12" / Home Theater

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