I use one sub but crossover very low, 45hz and run my speakers full range. The sub merely augments the RM 40's so the volume is very low. My speakers, VMPS RM 40's, have good powerful bass into the low 30's. I mean honest bass, not the bass that most manufacturers advertise. I don't know about your Totem's so you'd have to make your own calculation.
In my case one good sub is the wiser choice. Two subs do have advantages, especially if you have to cross over higher. Also they can help balance room problems but as the poster above mentions, can also increase problems. With four large bass traps and digital equalization I don't have that problem.
If you can crossover below 60hz I'd go for one better sub. A low, below 80hz, crossover makes it easy to integrate and has less potential problems. If down the road you want two you hopefully can afford the second sub.
In either case I'd get a sub. There's alot more bass than most people realize until they hear it for themselves. I'm surprised how much comes out of my sub being crossed over at 45hz with a 24db slope. It's help to my large mains has been a very good investment.
In my case one good sub is the wiser choice. Two subs do have advantages, especially if you have to cross over higher. Also they can help balance room problems but as the poster above mentions, can also increase problems. With four large bass traps and digital equalization I don't have that problem.
If you can crossover below 60hz I'd go for one better sub. A low, below 80hz, crossover makes it easy to integrate and has less potential problems. If down the road you want two you hopefully can afford the second sub.
In either case I'd get a sub. There's alot more bass than most people realize until they hear it for themselves. I'm surprised how much comes out of my sub being crossed over at 45hz with a 24db slope. It's help to my large mains has been a very good investment.