Start

Does the Klipsch R-121SW work with the Marantz AV7706?

Verdict
Yes

The R-121SW has a line-level input, and the AV7706's 2 subwoofer outputs feed it.

Connection
Line-level
Sub out to its LFE input
Sub outputs
2
On the AV7706
Amplifier
200 W
Built into the R-121SW

How to connect them

  1. Run a subwoofer cable from the AV7706's sub out 1 to the R-121SW's line-level input.
  2. Set speakers to Small with an 80 Hz crossover.
  3. Run Audyssey MultEQ XT32 with its microphone at your seat.

Plan the R-121SW and AV7706 in your own room.

Draw your room in 3D, place both, and see every connection checked and how loud they play at your seat. Designing is free.

Build it in your room

The specs that decide it

Klipsch R-121SW

Amplifier
200 W
Low end
28 Hz
Inputs
Line
MSRP
$650 each (MSRP, September 2026)
All R-121SW specs and pairings

Marantz AV7706

Amplifier channels
0
Subwoofer outputs
2
MSRP
$2,000 each (MSRP, January 2026)
All AV7706 specs and pairings

Questions about the R-121SW and AV7706

Does the R-121SW connect to the AV7706?
Yes. The R-121SW has a line-level input, and the AV7706's 2 subwoofer outputs feed it.
What crossover setting should I use with the R-121SW?
Set your speakers to Small with an 80 Hz crossover: the standard starting point for a receiver and subwoofer, whichever subwoofer you use.
How do I connect the R-121SW to the AV7706?
Run a subwoofer cable from the AV7706's sub out 1 to the R-121SW's line-level input.

Swap one of them

References

  1. Klipsch R-121SW: Spec sheet, assets.klipsch.com, retrieved September 15, 2026
  2. Klipsch R-121SW: Retailer listing, bestbuy.com, retrieved September 15, 2026
  3. Marantz AV7706: Owner's manual, marantz.com, retrieved September 15, 2026
  4. Marantz AV7706: Manufacturer product page, web.archive.org, retrieved September 15, 2026

Specs verified against the manufacturer's published data. Last checked September 15, 2026.

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.