You can access to the original review here.
There’s just one downside; the absence of bragging rights! The typical high-ender may not have heard of the brand in part because JMF Audio almost never appears on the second-hand market; there is nothing left to upgrade from here. As you won’t find a preamp that does what the PRS 1.5 does elsewhere, so you won’t swap it for The Next Big Thing. Similarly, I find it hard to imagine what you might buy after owning a pair of HQS 9001s. And as the company doesn’t make a new product every year, they don’t get the exposure of other, more attention-grabbing brands. And finally, the JMF Audio products make a sound that is so intrinsically ‘right’ isn’t going to be as ‘bling!’ as one that shouts from the rafters.