Hey OP ??? Equaliser ??? Where and why are you needing one?
You can replace your DAC which although good value can easily be bettered by a number of units, at 2 to 3 times the price. Also consider the streamer is as or more important than the DAC.
You mention DIY bass traps, which is great and suggests you are aware of the value of room treatment. A wise poster mentioned a microphone and REW which if you don’t have will be the biggest bang for the buck ever.
Now to directly address your requirement of 1 item only. This will totally transform your system. Get yourself a DBA and figure out how to remove the equaliser.
I strongly recommend reading up on the benefits of a multi-sub approach. Earl Geddes has much info and videos on the theory and set-up. If you have a space problem or fear of clutter the subs can be incorporated into the decor. I helped a mate with a difficult room by installing an 8" driver into a sealed box. We made 3 of these, one as a coffee table, one to support a reading lamp and one to support a pot plant. These small boxes hardly intruded but WOW the result was truly transformative. The idea is not to fill the room with thunderous bass but to smooth out the problematic nodes.
3 or 4 small boxes with your DIY skills should be easy 😁
You can replace your DAC which although good value can easily be bettered by a number of units, at 2 to 3 times the price. Also consider the streamer is as or more important than the DAC.
You mention DIY bass traps, which is great and suggests you are aware of the value of room treatment. A wise poster mentioned a microphone and REW which if you don’t have will be the biggest bang for the buck ever.
Now to directly address your requirement of 1 item only. This will totally transform your system. Get yourself a DBA and figure out how to remove the equaliser.
I strongly recommend reading up on the benefits of a multi-sub approach. Earl Geddes has much info and videos on the theory and set-up. If you have a space problem or fear of clutter the subs can be incorporated into the decor. I helped a mate with a difficult room by installing an 8" driver into a sealed box. We made 3 of these, one as a coffee table, one to support a reading lamp and one to support a pot plant. These small boxes hardly intruded but WOW the result was truly transformative. The idea is not to fill the room with thunderous bass but to smooth out the problematic nodes.
3 or 4 small boxes with your DIY skills should be easy 😁