Can you still tell the difference between the real ringtone and the modern speaker system if you hard pan it to a single speaker? It's monophonic, with a simple timbre, and is fairly high pitched, all of which contribute to making interference between speakers easily noticeable when played on a stereo (or other multi-speaker) system.
Multi-speaker sound systems are inherently flawed because the different path lengths from speaker to ear cause constructive/destructive interference at different frequencies. Most of the time you don't notice it, but for some sounds it's obvious. Try listening to mono pink noise played on stereo speakers, and move your head from side to side. The effect is strongest close to the speakers and in an acoustically dry room. Compare to the same noise played on a single speaker.
As for the gunshot, it's probably just lack of volume, and I consider that a good thing. I don't want my sound system to cause hearing damage.