My quintet went out after a double brown-out/surge courtesy of Hurricane Irene. A quick call to PS Audio got me a replacement module in two days! PS Audio didn't even ask about warranty status (it wasn't). Now that's what I call "above and beyond" customer service!
But, to answer the question, the Quintet made an immediate positive aural improvement to my system. It replaced a Chang 6400 which has a more "midrangy" sound. I am not knocking the Chang in any way; it's just different.
I use two quintets: one for my audio system and another for the video section of my rig. Also, have a Duet in the bedroom for my headphone system.
But, to answer the question, the Quintet made an immediate positive aural improvement to my system. It replaced a Chang 6400 which has a more "midrangy" sound. I am not knocking the Chang in any way; it's just different.
I use two quintets: one for my audio system and another for the video section of my rig. Also, have a Duet in the bedroom for my headphone system.