I own a PS Audio UOHC and a Shunyata Hydra 2. In my expeiences, the UOHC presents a slightly blacker background, while the Hydra 2 does a better job at not restraining dynamics. In your application, for subwoofers, high powered amps, etc, I'd recommend the Hydra 2. The UOHC is better suited for use on front end components, IMHO.
Regards,
John
Regards,
John