When I heard that the speaker experience on the HTC One was to be called BoomSound, I LOL'ed. Literally. Stupid name... but is it a marketing gimmick or a genuinely good feature?
Actually, the speakers on the HTC One kick ass.
Look at the phone you're using now. Where's the speaker? I'm willing to bet that it's on the back. That's kinda stupid right? You're not generally behind your phone. Add in the fact that on the majority of devices all you get is mono sound and you have to commend HTC for doing something different. BoomSound is dual front facing speakers that bring an unprecedented level of clarity (and volume?) to audio playback. The speakers have their own amplifier and can (say HTC) output up to 93dB of sound, with sound 'enhanced' by the Beats audio processor.
The overall result is surprisingly good. Sound is loud (the boot sound can make you jump) but also exceptionally clear and defined. As well as playing various audio and video sources since my One arrived, i've been playing a few games and I have honestly noticed new nuances in the sounds that I previously just did not know were there (I rarely use headphones for gaming).
While the overall bass response is still limited by the physical characteristics of the speaker and the phone in which it was placed, i'm pretty comfortable saying that BoomSound, despite it's rather silly moniker, is the best speaker audio i've ever heard on a phone.