Subwoofer is too loud with gain all the way down

Hi, it's an Emotiva Mini-x a-100. I would imagine that they are line level preamp outputs.
It's pretty much too loud and too boomy with most music. I have the sub X-over @80Hz. 
I have an integrated amp and preamp because I need the USB DAC to go to my computer. I thought that it was very normal to have a preamp feeding into a power amp or integrated amp? 

Put some Rothwell inline attenuators on the subwoofer rca's

Cheers George 

Ahh,  I see there's a little confusion. An integrated amplifier includes a preamplifier. The Emotiva A100 is a stereo amplifier, with a volume control.  If it included source switching it would be a true integrated.  So no, it's not common for a preamp to feed an integrated.

In any event, I suspect the problem is where you are managing the volume. The Emotiva's RCA output is a copy of the input. It is not affected by the Emotiva's volume control.

Turn the volume all the way up on the Emotiva, and leave it there. Use the Micca's volume control to set your listening level. Now you should be able to get the sub woofer into a usable range. 

You may need to play with this somewhat, but wherever you end up setting the Emotiva's volume, you'll need to be sure it's a setting you can replicate, if you accidentally change it.

As I noted before, another option is probably to use the speaker outputs, if your sub supports that. Then you should be able to use the Emotiva's volume control.

Best,

Erik

Setting the Emotiva volume control @95% worked. Thank you!!  

Glad I could help.  You are most welcome.  Most people think I make this stuff up. :)

Erik