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<blockquote data-quote="gunz4me2" data-source="post: 6826556" data-attributes="member: 613729"><p>The actual bench testing was performed with non-reactive, pure resistive dummy load resistors connected to the amplifier, a fairly large power supply, and a couple of that shop's huge *** Interstate demo batteries wired in parallel to keep the voltage up. Clipping was monitored with an old school CRT oscilloscope that looked even more ancient than my Sencore.//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif Voltage and amperage were measured with the shop's Fluke meters. Edit: All testing was performed by a friend who worked for that shop, who is MECP certified and was attending school for electronics repair at that time.</p><p></p><p></p><p>Why should there be an impedance rise associated with non-reactive, pure resistive, dummy loads? The fact of the matter is the older, Hifonics Brutus series sucked royal balls below 50 Hz at making any form of clean power. Sure, the load isn't reactive or similar to that of a subwoofer, but it is pretty pathetic when other amplifiers will still produce a good bit of power as low as 15 Hz and the holy grail of budget amplifiers at that time started to peter out between 45 and 50 Hz.</p><p></p><p>Also, this test was performed nearly three years ago and I don't remember all the specifics for the power produced at 1 ohm. IIRC, it produced close to 1,200 watts without clipping on a 68 Hz tone, 800 and change (868 or something like that) with a 50 Hz tone, and 200 to 300 watts RMS without clipping on tones from 20 Hz to 35 Hz. Of course, I may be too kind going from memory and the measured unclipped output may have been lower at the various impedances.</p><p></p><p>My poor memory is the reason I keep a running spreadsheet of all the amplifiers that I bench test for myself!//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif</p><p></p><p>Edit... Then again, these test results are pretty moot since the Brutus line has been revised at lest two or three times since then. I still laugh at their CEA certification since the only place it holds weight is at 4 ohms due to the fact that there are currently no provisions for CEA to certify the lower impedances.</p></blockquote><p></p>
[QUOTE="gunz4me2, post: 6826556, member: 613729"] The actual bench testing was performed with non-reactive, pure resistive dummy load resistors connected to the amplifier, a fairly large power supply, and a couple of that shop's huge *** Interstate demo batteries wired in parallel to keep the voltage up. Clipping was monitored with an old school CRT oscilloscope that looked even more ancient than my Sencore.[IMG]//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif[/IMG] Voltage and amperage were measured with the shop's Fluke meters. Edit: All testing was performed by a friend who worked for that shop, who is MECP certified and was attending school for electronics repair at that time. Why should there be an impedance rise associated with non-reactive, pure resistive, dummy loads? The fact of the matter is the older, Hifonics Brutus series sucked royal balls below 50 Hz at making any form of clean power. Sure, the load isn't reactive or similar to that of a subwoofer, but it is pretty pathetic when other amplifiers will still produce a good bit of power as low as 15 Hz and the holy grail of budget amplifiers at that time started to peter out between 45 and 50 Hz. Also, this test was performed nearly three years ago and I don't remember all the specifics for the power produced at 1 ohm. IIRC, it produced close to 1,200 watts without clipping on a 68 Hz tone, 800 and change (868 or something like that) with a 50 Hz tone, and 200 to 300 watts RMS without clipping on tones from 20 Hz to 35 Hz. Of course, I may be too kind going from memory and the measured unclipped output may have been lower at the various impedances. My poor memory is the reason I keep a running spreadsheet of all the amplifiers that I bench test for myself![IMG]//content.invisioncic.com/y282845/emoticons/laugh.gif.48439b2acf2cfca21620f01e7f77d1e4.gif[/IMG] Edit... Then again, these test results are pretty moot since the Brutus line has been revised at lest two or three times since then. I still laugh at their CEA certification since the only place it holds weight is at 4 ohms due to the fact that there are currently no provisions for CEA to certify the lower impedances. [/QUOTE]
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