This preamplifier is based on Rod Elliott's project #2 on his ESP website, which is linked below. Using NE5532 (or any opamp of your choice, really) opamps, giving reasonably low-noise characteristics, makes assembly simple and a breeze. It features bass and treble tone controls, a balance control as well as a volume control. This can be added in to an existing amplifier (as long as you can provide +/-15V supply rails), or in a new build!

Rod's original project/article: https://sound-au.com/project02.htm

Link to a video on my channel about the project:

NOTE: out of respect for Rod Elliott's copyright, I will not be reproducing the schematic here. All details and schematics are in the above linked article. As he doesn't have a PCB to sell for this project, I decided to provide one.