akuma4u Posted December 31, 2015 Report Share Posted December 31, 2015 Hey - im trying to tune my amp with test tones (50hz) and im not sure which technique i should use.. ive heard people say to use a 0db test tone and ive also heard NOT to use a 0db but instead use a negative db tone.. -10, -5, etc... what did you guys use and whats the preferred db level? thanks Link to comment Share on other sites More sharing options...
Smoove Posted December 31, 2015 Report Share Posted December 31, 2015 Most of us a DD-1 @40hz on -5 or -10. 2 Team Fi 15's v1 2 DD M5's 970amps of Alt 6th order blowthroughThe truck Blowthrough build : http://www.stevemeadedesigns.com/board/topic/155555-smooves-1996-chevy-ext-cab-c1500-slow-build/The 350z build : http://www.stevemeadedesigns.com/board/topic/170694-smooves-2003-nissan-350z/ My FB page https://www.facebook.com/pages/Smooves-Car-Audio-and-performance/719746144805343 Team Fi Audio http://www.ficaraudio.com/ Link to comment Share on other sites More sharing options...
reedal Posted December 31, 2015 Report Share Posted December 31, 2015 If you're using a tool that allows you to measure the distortion or clipping (DD-1 or oscilloscope is what most people use/can afford), then commonly it's 40hz tone between -5dB and -10dB. -7.5dB is a good level though for most music in my opinion. And it's better to do a sweep of frequencies, starting from the frequency where you subsonic filter is, and going up to you LPF, because not every frequency will distort at the same level. Just my two cents. If you're setting gains for your maximum clean output and aren't using a tool that measures distortion in a signal, then good luck to you 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...
EDH Posted December 31, 2015 Report Share Posted December 31, 2015 I usually set my gain rather conservatively with a 40hz -2.5dB tone for daily listening.When i compete i always set my gain using the dbDrag cd which i believe is recorded at 0dBfs. Current setup DD Z318 Extra Stiff, Kevlar cone, Double top plate x2 Banda Viking 10k x2 5 Banks of Maxwell 2.85v 3400F caps Build log Termpro Profile Link to comment Share on other sites More sharing options...
miniSPLlancer Posted December 31, 2015 Report Share Posted December 31, 2015 handheld oscilloscope at 40hz but testing +/- 5hz 2011 Mitsubishi OutlanderSony 712 Soundqubed HDS208 Alpine MRV-M500 Transmission line enclosure Soundqubed wiring Knu rca XS Power battery CNF terminals Link to comment Share on other sites More sharing options...
MADVIBES Posted January 2, 2016 Report Share Posted January 2, 2016 I choose the freq that my systems peaks at, which is usually 30hz'ish mids and highs turned off. If no oscope or distortion tester go for the ol listen test route and try to hear for the sub begging for mercy. DB DRAG PSYCHLONE PRO 156.3 30 SECOND AVERAGE FO MAX AT 26HZ LEGAL DASH DRIVER DOOR OPEN 158.0@30 HZ MY BEST SO FAR, HOPEFULLY A 160 COME FEBUARY. 156.9@26hz 158.0@30hz Link to comment Share on other sites More sharing options...
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