Maxgain, The Hubble 8300, aprox. $20.00, the PS Audio power port $ 45.00 and the Wattgate $120.00. (These were the best prices I found new) My impressions were the Hubble and the Wattgate have very similar tonal qualities. Both have speed and bass control. Both are neural in there appearance, no discernable added sound. The Wattgate has an incredible smoothness and life like quality. It's as if the notes and images are less artificial and more liquid. Very hard to put my finger on other than the Wattgate is extremely musical. The PS Audio is a very different creature. It's very lively but etched and sterol. The entire presentation is more forward and brighter. I'm not saying it's bright, just more treble energy.
For the money the Hubble is a great outlet and will add say 10-15% to the systems capability. I'm not sure what that really means, only a point of reference. The Wattgate is far more refined and adds yet another 10-15%. If I were to put it in terms of dollars vs system cost, the Wattgate is giving me 30% more from my $5000 Plinius amp. Could I get that same 30% from $120 more expensive amp? I do not think so. I'm not sure I would receive that 30% from an $8000 amp. I love my equipment and how it sounds. With the Wattgate it simply makes the equipment I already love, better.
As for the PS Audio, I felt it changed my equipment, and I did not want it changed, just improved. If your system has faults by being a bit to warm, thick and muddy bass or needs more treble energy this may be a better outlet than the others. If you can imagine, another system dependant improvement.
