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<blockquote data-quote="zako" data-source="post: 7762044" data-attributes="member: 629735"><p>Not directly with it, but I would not hesitate to buy it. I own the related PPI P900.4 The subjective listening tests to evaluate just the amplifier are nearly worthless because human acoustic memory is very short. John &quot;Zaph&quot; Krutke (of zaphaudio.com) is arguing something along these lines too; listening tests are good for evaluating the whole audio system, but the individual component is best bench tested. For what it worth, I got the PPI P900.4 amplifier which is based on the same design as Polk D4000.4, which belongs to the same family as D5000.5. Based on bench tests I have seen, I think Polk D series of amplifiers may be slightly better amplifiers than PPI Phantom for the highs due to higher channel separation spec on the Polks. However, this is something that only people who work DSP with time alignment and independent left/right equalizer should worry about. For someone without advanced DSP, both should be very good. I use my PPI for subwoofer and rear speakers.</p></blockquote><p></p>

[QUOTE="zako, post: 7762044, member: 629735"] Not directly with it, but I would not hesitate to buy it. I own the related PPI P900.4 The subjective listening tests to evaluate just the amplifier are nearly worthless because human acoustic memory is very short. John "Zaph" Krutke (of zaphaudio.com) is arguing something along these lines too; listening tests are good for evaluating the whole audio system, but the individual component is best bench tested. For what it worth, I got the PPI P900.4 amplifier which is based on the same design as Polk D4000.4, which belongs to the same family as D5000.5. Based on bench tests I have seen, I think Polk D series of amplifiers may be slightly better amplifiers than PPI Phantom for the highs due to higher channel separation spec on the Polks. However, this is something that only people who work DSP with time alignment and independent left/right equalizer should worry about. For someone without advanced DSP, both should be very good. I use my PPI for subwoofer and rear speakers. [/QUOTE]

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