Doing exactly what she wanted meant steering clear of the "polished" qualities of her earlier work.
"While I really loved that aesthetic, I wanted to get rid of that on this record. I really wanted to sound like 'Blammo, in your face' so that you could really hear us as a band playing together, and that joy of playing together. There's an ease there," she adds.
And indeed, that's what you hear on tracks like the Motown-esque Holy City, inspired by a visit to the Wailing Wall in Jerusalem, and the girl-group doo-wop title track The Classic.
Wasser explains that there's also another good reason for the album's feel-good factor.
"I wrote this record in a different place than I've ever been. I was not in a relationship. I was not obsessed with anyone else - for the first time in a very long time. So, all that energy that in the past I've poured into other people, I was giving to myself. And that's a different feeling," beams Wasser.
"There are love songs on this record, but they're about someone I would hope to meet, they're not actually about specific people, as they really have been in the past. I feel it gave it so much of an open quality and, then again, just another level of easiness.
"I proved to myself, I actually can be really happy just on my own. I think I doubted that somewhere."
Joan As Police Woman's new album The Classic is out now.