Yeah most separate preamps omit that because people getting into separates tend to be chasing ultimate performance which tone controls are not. At all.
Stepping up from a receiver you’ll do well to look at integrateds as the next logical step and far more sound quality for the money than separates. Just get one with a single pre-out. All you need.
Subs definitely help but most still have not figured out the answer is several not one. At low frequencies you get a lot of bass modes, which is actually good, you want more, as more is smoother. So its actually better to run the main stereo pair full range, using whatever bass output they have to contribute to that smoothing. Then use four subs spread out asymmetrically around the room. These four can be anything from four speakers with one amp to four separate powered subs, or anything in between. Search for Swarm or distributed bass array and read the threads to see how deliriously happy we all are who have taken this approach.
Stepping up from a receiver you’ll do well to look at integrateds as the next logical step and far more sound quality for the money than separates. Just get one with a single pre-out. All you need.
Subs definitely help but most still have not figured out the answer is several not one. At low frequencies you get a lot of bass modes, which is actually good, you want more, as more is smoother. So its actually better to run the main stereo pair full range, using whatever bass output they have to contribute to that smoothing. Then use four subs spread out asymmetrically around the room. These four can be anything from four speakers with one amp to four separate powered subs, or anything in between. Search for Swarm or distributed bass array and read the threads to see how deliriously happy we all are who have taken this approach.