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Connecting to a subwoofer.

nuraman00
Level 7
I have a ROG CROSSHAIR VII HERO (WI-FI).

How do I connect it to a SVS SB-2000 Pro subwoofer?

I tried connecting a RCA cable from the orange port on the on-board sound card, to the LFE port on the woofer.

Two problems.

One is that the cable doesn't stay firmly into the orange port.

The other is that the subwoofer makes a loud hum.

I also currently have a 3.5mm to red/white RCA cable going from the green port on the sound card, to my powered speakers.

Here is the manual for the motherboard:

https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM4/ROG_CROSSHAIR-VII-HERO_WI-FI/E13834_ROG_CROSSHAIR_VI...
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11 REPLIES 11

xeromist
Moderator
That depends on your sub. If it has a passthrough while powered off then sure. But most likely it's not designed to do that. Most people wouldn't consider it to be desirable behavior.
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Jesseinsf
Level 10
nuraman00 wrote:
I have a ROG CROSSHAIR VII HERO (WI-FI).

How do I connect it to a SVS SB-2000 Pro subwoofer?

I tried connecting a RCA cable from the orange port on the on-board sound card, to the LFE port on the woofer.

Two problems.

One is that the cable doesn't stay firmly into the orange port.

The other is that the subwoofer makes a loud hum.

I also currently have a 3.5mm to red/white RCA cable going from the green port on the sound card, to my powered speakers.

Here is the manual for the motherboard:

https://dlcdnets.asus.com/pub/ASUS/mb/SocketAM4/ROG_CROSSHAIR-VII-HERO_WI-FI/E13834_ROG_CROSSHAIR_VI...

I believe you need a 75-Ohm cable because it is a coax connection. and you need to turn the volume down in windows before connecting so you don't blow the house down by accident. Also, you need to keep in mind that the sub connection on the MB is also carrying the center channel. You need to get a splitter. they do sell 3.5mm to two RCA cables.