There is a Tice Solo conditioner for sale on A'gon for $300. It does not constrict dynamics. It does not have an OFF/ON switch.
I own one and it's one of the best purchases I've ever made. It has completely silenced the noise from my apartment outlets. Highly recommended (no, the one for sale is not mine).
I own one and it's one of the best purchases I've ever made. It has completely silenced the noise from my apartment outlets. Highly recommended (no, the one for sale is not mine).