XLR Volume Pot - for dedicated Sub amp


Hello,
I have a preamp with 2 pairs of outputs. Looking to use one pair feeding a dedicated amp to power passive subwoofers.

Here's the catch - I want to adjust the gain feeding into the amp so I can dial in the added bass from these passive subwoofers relative to bass content in the music

I was going to DIY a small aluminum case having a pair of XLR inputs and a pair of XLR outputs.

I prefer a stereo pot.

What type of XLR pot do I use to adjust signal gain for the Emotiva XPA-200 amp? I see some pots have K - Ohms. What do value should I use?
Can you mention brand, model #, website?

Thank you
pdspecl
The Emotiva control freak is looks exactly like what I need. Reasonably priced too. THANK YOU!!!!! :)
Hi Pdspecl

Would the Emotiva Control Freak help out in your situation?

http://shop.emotiva.com/collections/accessories/products/control-freak
I checked around on the web and thinking the Scott Endler stepped attenuators are my best option relative to cost. Not looking to blow a lot of money here.

I had seen his website years ago and forgot about it. Thanks for mentioning his name.

I was thinking of a second approach in using an LPAD on the speaker itself but someone mentioned that using an LPAD effects damping factor and as a result the woofers may not controlled as well.
The more I reduce volume the greater the effect of loosing woofer control

Can anyone confirm this and explain this effect if in fact it is true??????