tboorn Posted October 9, 2015 Report Share Posted October 9, 2015 So i recently got my very own AMM-1, woo-hoo!!! i finally got around to putting it to use and im wondering what are some results every one else has seen... what im mainly interested in is what is the best/worst Power Factor youve seen. And is there anything you can do, other than rebuilding an enclosure to try and find what is the most efficient orientation, to try and increase the power factor you are seeing. I recently decided to throw one of my N2s in a single 12" box that is 2.5' and tuned to 36hz i believe. i had built it for a guy who was running 12" L7's but i ended up convincing him to run 4 x SA 8"s so i had the box laying around. i slapped a piece of wood over the square opening and threw the N2 in to see if i could blow it. (this thing is a fucking monster BTW and ive been unsuccessful for about a month of pure torture) right now i have it hooked up to a DD M3b at .5 nominal, now here is where it gets interesting. Ive always heard tall tales about how neo generally rises more blah blah blah, well currently from 30hz-40hz im only rising to 1ohm reactive, and the highest rise from 20hz-40hz is like 1.4... so i know im beating the shit out of the sub, on dyno mode i clamped around 3800 watts at 34hz. But what i really find most interesting, and wasnt expecting at all, is my power factor is like 95%?!?!?! so i stared to wonder, what is everyone else seeing for there power factor results? so lets hear some stories about the good and the bad Quote Fidelity Built to Last Team Sound Asleep 24Runner Build Log: http://www.stevemeadedesigns.com/board/topic/196657-24runner-sleeper-system-lots-of-fi-neo-dd-focal-new-video-w-juicebox-lithium/ 2 x 12" Fi BTL N2 / 2 x 12" Fi BTL N3 2 DD M3b Maxwell 2.7V 3000F Supercapacitors Pioneer DEH-80prs Focal P165 V30 components Rockford Fosgate T-400.4 Link to comment Share on other sites More sharing options...
reedal Posted October 9, 2015 Report Share Posted October 9, 2015 I don't have an AMM-1 yet :'( But what do you mean by "what is the most efficient orientation"? Like, direction of subs and port? Center or side port? Slot vs aero? That kind of stuff? Just trying to understand what you meant, cause if its those, I'd like to understand how that would change the power factor. Thanks! Sorry if it's a thread jack. Quote SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32 Link to comment Share on other sites More sharing options...
tboorn Posted October 9, 2015 Author Report Share Posted October 9, 2015 I don't have an AMM-1 yet :'( But what do you mean by "what is the most efficient orientation"? Like, direction of subs and port? Center or side port? Slot vs aero? That kind of stuff? Just trying to understand what you meant, cause if its those, I'd like to understand how that would change the power factor. Thanks! Sorry if it's a thread jack. i meant more towards the size of the enclosure, along with the size of the port, affecting the mechanical compliance of the subwoofer and either negatively or positively helping it stay linear and efficient. the reason i was so surprised is because the power factor is so high, yet by the time i reach full tilt in this enclosure between 30hz-34hz, the sub is bottoming out due to it being right at the limit for maximum recommended airspace, and seeing almost double rated, yet still seeing a very good power factor. Quote Fidelity Built to Last Team Sound Asleep 24Runner Build Log: http://www.stevemeadedesigns.com/board/topic/196657-24runner-sleeper-system-lots-of-fi-neo-dd-focal-new-video-w-juicebox-lithium/ 2 x 12" Fi BTL N2 / 2 x 12" Fi BTL N3 2 DD M3b Maxwell 2.7V 3000F Supercapacitors Pioneer DEH-80prs Focal P165 V30 components Rockford Fosgate T-400.4 Link to comment Share on other sites More sharing options...
reedal Posted October 9, 2015 Report Share Posted October 9, 2015 Gotcha. Thanks! Tuned in for power noms Quote SMD Tool Map https://www.stevemeadedesigns.com/board/topic/193176-smd-tool-map-new-november-2014/ Build log https://www.stevemeadedesigns.com/board/topic/197217-reeds-03-tahoe-hat-sqaq-singer-xs-shca-cockbox-80prs/?page=32 Link to comment Share on other sites More sharing options...
Wicks Posted October 9, 2015 Report Share Posted October 9, 2015 Here's an impedance plot (blue) of my XL12's, along with phase angle (red): Notice that the phase angle crosses zero at each tuning point (impedance curve changes direction). At those points (phase angle is zero) your power factor would then be 1. Quote This post sent with 100% recycled electrons. 2004 BMW M3Mechman 280A 2 - XS Power XP30001 - XS Power D375 500F of Maxwell SuperCaps (soon to be 1000F) iPadMini2Dash mounted O-scopeAudison bitOne (Remote DRC MP) Highs Amp - PPI Art A404 Hertz HSK130 (HSK165 waiting...) DC Audio DC9.0K 2- DC Audio XL12m2LEGAL - 147.3dB @ 41Hz OUTLAW - 150.2dB @ 45Hz OUTLAW - 145.7dB @ 30Hz JUNE 2014 SOTM WINNER 2014 COLORADO PEOPLE'S CHOICE WINNER SOTM BUILD:http://www.stevemeadedesigns.com/board/topic/141656-wicks-e46-m3-build-bass-turbo-button-and-a-big-new-addition/page-68#entry2802026 Link to comment Share on other sites More sharing options...
tboorn Posted October 10, 2015 Author Report Share Posted October 10, 2015 wow awesome graph and info!! I'm gonna have to go and do some more testing!!!! Quote Fidelity Built to Last Team Sound Asleep 24Runner Build Log: http://www.stevemeadedesigns.com/board/topic/196657-24runner-sleeper-system-lots-of-fi-neo-dd-focal-new-video-w-juicebox-lithium/ 2 x 12" Fi BTL N2 / 2 x 12" Fi BTL N3 2 DD M3b Maxwell 2.7V 3000F Supercapacitors Pioneer DEH-80prs Focal P165 V30 components Rockford Fosgate T-400.4 Link to comment Share on other sites More sharing options...
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