I use a sub, I never have issue, I think you are imagining an issue that likely not going to happen. Like I said, I don't have any of this in my system, work really well. I would concentrate on the quality on the speakers then the amp. If there is still deficiency, then worry about it. Maybe wait to save up more money for better speakers and amp. The more stuffs you add in the signal chain, it will only degrade the sound.
Put all the money to get your speakers first, try it on your system first and go from there.
BTW, a sub is NOT a must for music. Yes, for movie and you want some boom and shaking, a sub is important. My sub is set very low volume. A good pair of floor stander will give you all the bass you need. Save up for a better pair of speakers. Instead of budging $1000 for the new system, spend $1000 on a pair of speakers and put it into your existing system and go from there.
I know all about wanting to adjust bass, treble, been through all these. I am so glad I had an amp before that had bypass of the tone control. At first, I felt it's kind of flat without the tone control particular the "loudness" button. But when I sit and listen with bypass, I notice all of a sudden, the sound is more transparent, it's just sweeter. Putting back the tone control just destroy that even though I got more bass and treble.
Own designed power amp, own designed preamp, JM LAB Focal Alto Utopia and Spectral 913.1 speakers, Rythmik F12SE sub.
Not hooked up: Nakamichi Stasis PA-7 power amp, Velodyne VA1210 sub, Kef Reference Series center, Kef Bookshelf speaker, Monitor Audio bookshelf speaker, Infinity rear speakers. Acurus 3X200W amp.
Last edited by alan0354; 05-20-2020 at 11:00 PM.