Full range speaker for rogue 90 or 100 wpc amp.

@dpm2340 The size of the woofer cone and its magnet and the cabinet design and quality are more important for getting deep bass than whether it has two drivers or three or more. There is a school of thought in speaker design that argues that it is easier to design a highly accurate two-way speaker with one simple crossover. Totem and several other brands follow that approach in designing speakers that fit your budget. And getting to 36 Hz is below the 41 Hz that is the lowest note on a typical acoustic bass. A pipe organ and some electric instruments will go lower. See this article. https://www.soundenvironment.com/what-frequencies-are-bass/.

If you want really deep bass either find a floor stander with a larger woofer and powerful magnet that can move more air or budget to add the right subwoofer. Not sure you can find the former in your budget. (Many excellent subs do not extend below the 30 Hz area or do so with a significant drop in sound level.)

Good luck!

Hello,
I like ProAc speakers for $1800, Coincedent super Eclipse. I think they are rated at 14 ohms. I have heard them on a lot of Rogue gear. $1600 used. System Audio speakers. These three are great choices. My favorite is the Coincident super eclipse. These would cost $10k today. The ProAc are a little warm with the silk dome tweeter with tubes. 

Hello,
I second the Totems. They really disappear on tubes. 

maybe I wasn't clear enough when I stated my budget. It is for the used market. sorry

I have the same Rogue RP5 and the ST100.  Front speakers are Ascend Towers with RAAL.  Sound is outstanding. 

That said, the Towers with RAAL new are beyond your budget.  Sometimes they come available on the used market (I've seen them on usaudiomart).  Not a Tower, but the Ascend Sierra 2EX is a close second per user reviews - I've not heard these but am considering upgrading my S2's to the EX version).