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<blockquote data-quote="zako" data-source="post: 8051426" data-attributes="member: 629735">The March edition of Russian magazine avtozvuk tested the BK520.4. The html version will be available in a couple of months. The results are pretty good.With 14.4V DC powerRMS watt output at 4ohm: 4x103wattsRMS watt output at 2ohm: 4x158wattsTHD at 10% of max watt output: 0.05%(4 ohm)/0.061%(2ohm)THD at 1watt output: 0.137% (4ohm)/0.197%(2ohm)SNR with respect to 1watt output: 83dB (so SNR with respect to full output would have been _much_ higher)So basically it&#039;s an honest to god Class A/B amplifier. That&#039;s probably plenty of power for _most_ component speakers out there. If you asked me, my personal pick would have been an Alpine MRX-F65 Class D amp (another extremely nice and clean amplifier, but a lot smaller and more efficient), but when you compare the prices, the PPI BK is a great value for a staving audiophile, costing about half the price of Alpine.</blockquote>

[QUOTE="zako, post: 8051426, member: 629735"] The March edition of Russian magazine avtozvuk tested the BK520.4. The html version will be available in a couple of months. The results are pretty good. With 14.4V DC power RMS watt output at 4ohm: 4x103watts RMS watt output at 2ohm: 4x158watts THD at 10% of max watt output: 0.05%(4 ohm)/0.061%(2ohm) THD at 1watt output: 0.137% (4ohm)/0.197%(2ohm) SNR with respect to 1watt output: 83dB (so SNR with respect to full output would have been _much_ higher) So basically it's an honest to god Class A/B amplifier. That's probably plenty of power for _most_ component speakers out there. If you asked me, my personal pick would have been an Alpine MRX-F65 Class D amp (another extremely nice and clean amplifier, but a lot smaller and more efficient), but when you compare the prices, the PPI BK is a great value for a staving audiophile, costing about half the price of Alpine. [/QUOTE]

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