What crossover setting should I use with the SA-CS9?

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 SA-CS9 to the RX500A?

Run a subwoofer cable from the RX500A's sub out 1 to the SA-CS9's line-level input.

Does the Sony SA-CS9 work with the Yamaha RX500A?

Verdict

Yes

The SA-CS9 has a line-level input and speaker-level inputs, and the RX500A's 2 subwoofer outputs feed it.

Connection

Line-level

Sub out to its LFE input

Sub outputs

On the RX500A

Amplifier

115 W

Built into the SA-CS9

How to connect them

Run a subwoofer cable from the RX500A's sub out 1 to the SA-CS9's line-level input.
Set speakers to Small with an 80 Hz crossover.
Run Room Correction with its microphone at your seat.

Plan the SA-CS9 and RX500A 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

Sony SA-CS9

Amplifier: 115 W
Low end: 28 Hz
Inputs: Line, speaker-level
MSRP: $239 each (MSRP, September 2014)

All SA-CS9 specs and pairings

Yamaha RX500A

Amplifier channels: 7
Subwoofer outputs: 2
MSRP: $600 each (MSRP, May 2026)

All RX500A specs and pairings

Questions about the SA-CS9 and RX500A

Does the SA-CS9 connect to the RX500A?: Yes. The SA-CS9 has a line-level input and speaker-level inputs, and the RX500A's 2 subwoofer outputs feed it.
What crossover setting should I use with the SA-CS9?: 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 SA-CS9 to the RX500A?: Run a subwoofer cable from the RX500A's sub out 1 to the SA-CS9's line-level input.

Swap one of them

Sony SA-CS9 + Denon AVR-S670HConnects
Sony SA-CS9 + Denon AVR-X1700HConnects
Polk PSW10 + Yamaha RX500AConnects
Dayton Audio SUB-1200 + Yamaha RX500AConnects

References

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.