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Happy
I'll cautiously give this five stars. Replacing an old Marantz SM-80, this amplifier is astonishing, albeit only with room correction. On the one hand the Purifi controls the speakers much better than my old amp. The in-room loudspeaker response is measurably flat to within +/- 2dB over most of the range. This was not the case before. On the other hand there is a massive, one octave wide, almost 12dB bass bump, peaking at 80Hz. This may well be down to my speakers and their positioning at only 10 inches from the wall. However this effect is more pronounced than it was with my old amp, itself no slouch in the bass department. I ironed this out with room correction EQ, which turned out essential for my living situation.
That said, the precision and instrumental separation this amp wrings from my 30-year old Polk (not KEF) LS50 speakers has redefined what I thought those speakers were capable of. This amp is in a different league. The ability to hear into a recording now rivals that of my planar magnetic headphones. At the same time I find it less fatiguing than my old amp. It also performs much more evenly across my record collection. Records that previously sounded good still do, but the Purifi tends to bring up muddy and/or complex recordings to a similar standard. That's a big win.
If there is a downside, it's that on some recordings I find snare drums, and raspy sounds in general, a little too prominent. However that may be due to an interaction with my speakers or with the ability to better single out instruments in the mix, including drum kits and tambourines. The emphasis is that this applies to _some_ recordings only.
Coming from a 30-year-old amp, I of course find the value and performance of the Purifi hard to judge against it's peers, but I will say that it runs cool, Audiophonics' build quality seems good, the connectors appear of high quality, and the amp was well packaged and arrived on time. That said, while the power switch is satisfying and includes a ~2s relay delay, I can confirm the slight power on pop, more like a static click in the speakers, noted by another customer. It happens about a second after the relay engages the amp. There is also a small amount of coil whine, emanating from the amp while turned on, though only audible from a distance of about 1m or less while the house is quiet, at night.
This review has been posted for AUDIOPHONICS HPA-S450ET Power Amplifier Class D Stereo Purifi 1ET6525SA 2x450W 4 Ohm I'll cautiously give this five stars. Replacing an old Marantz SM-80, this amplifier is astonishing, albeit only with room correction. On the one hand the Purifi controls the speakers much better than my old amp. The in-room loudspeaker response is measurably flat to within +/- 2dB over most of the range. This was not the case before. On the other hand there is a massive, one octave wide, almost 12dB bass bump, peaking at 80Hz. This may well be down to my speakers and their positioning at only 10 inches from the wall. However this effect is more pronounced than it was with my old amp, itself no slouch in the bass department. I ironed this out with room correction EQ, which turned out essential for my living situation.
That said, the precision and instrumental separation this amp wrings from my 30-year old Polk (not KEF) LS50 speakers has redefined what I thought those speakers were capable of. This amp is in a different league. The ability to hear into a recording now rivals that of my planar magnetic headphones. At the same time I find it less fatiguing than my old amp. It also performs much more evenly across my record collection. Records that previously sounded good still do, but the Purifi tends to bring up muddy and/or complex recordings to a similar standard. That's a big win.
If there is a downside, it's that on some recordings I find snare drums, and raspy sounds in general, a little too prominent. However that may be due to an interaction with my speakers or with the ability to better single out instruments in the mix, including drum kits and tambourines. The emphasis is that this applies to _some_ recordings only.
Coming from a 30-year-old amp, I of course find the value and performance of the Purifi hard to judge against it's peers, but I will say that it runs cool, Audiophonics' build quality seems good, the connectors appear of high quality, and the amp was well packaged and arrived on time. That said, while the power switch is satisfying and includes a ~2s relay delay, I can confirm the slight power on pop, more like a static click in the speakers, noted by another customer. It happens about a second after the relay engages the amp. There is also a small amount of coil whine, emanating from the amp while turned on, though only audible from a distance of about 1m or less while the house is quiet, at night.
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