Well it turns out that they have and that company is none other than Harman/Kardon. According to @evleaks, he has revealed that Sprint will soon be getting a HTC One Harman/Kardon edition, although at this point in time we’re not sure when the device will be released, neither are we sure if he’s talking about the HTC One from 2013, or the HTC One M8 which was recently released.
However it seems that it’s more than likely that he’s referring to the HTC One M8, thanks to a recent post in the XDA forums in which the Harman/Kardon audio settings can be found in the phone’s settings, although perhaps it has not been activated yet as Sprint is still waiting on the deal to close.
Apparently Sprint’s version of the HTC One M8 will come with Harman/Kardon speakers, as opposed to other models on other carriers which would sport normal speakers, so rest easy if you bought the handset on Sprint because you won’t have to rebuy it. We’re not sure what the difference in audio quality would be yet since it hasn’t been officially announced, but you can bet that we are definitely excited. Either way we’ll be keeping our eyes peeled for more info.