I don't really think the ratio matters. You should be buying a sub for your room, not what speakers you have. I had a pair of Sf Sonetto 8s ($7000) and got a T9i ($1300). It sounded great in my small room, but in my main living room the T9i was inadequate for the room size. I upgraded to a Rel 212 ($5000) and it's more then enough to pressurize the room. When I upgraded to Kanta 2 speakers ($11000), it is still more then enough.
How Much Do Your Subwoofer(s) Cost Relative to Speakers
For people who own subwoofers in the main system, I am interested to know the price ratio of the subwoofer to speakers in your system. Prices in MSRP.
Say if the subwoofer(s) cost $10,000 and speakers cost $10,000, the ratio would be 1 : 1.
If the subs cost $5,000 and speakers cost $10,000, the ratio would be 1 : 2.
If the subs cost $3,333 and speakers cost $10,000, the ratio would be 1 : 3.
Mine is at about 1 : 3.5