I have a play:3 and love the software, but the frequency response is too narrow. I am looking for a new sonos unit with a wider range--I don't necessarily need more power. I understand you've made a business decision to not publish these specs, nor have I been able to find them on 3rd party sites. Can you give me a hint: will the play:5 give me something south of 40Hz, or do I have to purchase the sub for this? BTW, I noticed you published the low end spec for the sub (25Hz). P.S. the lack of published basic performance specs is really irritating for audiophiles and engineers (unfortunately, I'm both). Again, kudos for the software--it's the best.