DZR15 & DXS18xlf are modified by DigitalSound (DSP system configuration).
Mono sound.
PS15 R2 - slightly better HF (sure, it is 2” vs. 1” Throat Compression Drive)
PS15 R2 - slightly better in power reserve (before limiting)
DZR15 = PS15R2 in SPL !!!
DZR15 sound pretty close more expensive PS15R2 !!!
(use headphones for listening)
![](https://i.ytimg.com/vi/GN2Ex2l7DTc/maxresdefault.jpg)