757lmj Posted June 23, 2015 Author Report Share Posted June 23, 2015 Also what test tone? 40hz? 45hz? This box plays 26 to 50ish hz Link to comment Share on other sites More sharing options...
reedal Posted June 23, 2015 Report Share Posted June 23, 2015 The universal tone to set gains for a sub amp is 40hz. The sub level increases the output voltage. But using a multimeter doesn't tell you at what point your signal from the head unit AND amp starts to distort. You can do it, but you could possibly still distort the signal. Use the SMD tools map on this forum to locate someone local to you that has an oscope or dd1 to help find your distortion points and set your gains 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...
Quintine Posted June 23, 2015 Report Share Posted June 23, 2015 ^ yeah thats a much better idea. But if your interested 75% of volume on most head decks is safe. the 38.72v is calculated using ohms law. and the multimeter probes go in the speaker outputs. Edit: Oh and if its subwoofer level then tune with the sub level at maximum (Afaik) If you leave it till the last minute, it will only take a minute. Build Log - 4x12's Trunk Firing 6th Link to comment Share on other sites More sharing options...
757lmj Posted June 23, 2015 Author Report Share Posted June 23, 2015 Birth sheet says 1931 at 1 ohm, 1700 at 2 ohm, 1220 at 4 ohm. I figure at 1.3 it's around 1830 to be safe.. volts in that case is 48.77 instead of 38 something. That seems a bit substantial. Link to comment Share on other sites More sharing options...
Quintine Posted June 23, 2015 Report Share Posted June 23, 2015 I used 1500 @ 1ohm to work out the numbers. Just calculate for 1 ohm. So 1931 @ 1 and the amp will do the rest from there. But like reedal said, if u can get someone nearby to DD-1 it. If you leave it till the last minute, it will only take a minute. Build Log - 4x12's Trunk Firing 6th Link to comment Share on other sites More sharing options...
757lmj Posted June 23, 2015 Author Report Share Posted June 23, 2015 I used 1500 @ 1ohm to work out the numbers. Just calculate for 1 ohm. So 1931 @ 1 and the amp will do the rest from there. But like reedal said, if u can get someone nearby to DD-1 it. How much will that cost lol Link to comment Share on other sites More sharing options...
Quintine Posted June 23, 2015 Report Share Posted June 23, 2015 I doubt much if anything. Id do it but am located in AUS, so i doubt that helps much. If you leave it till the last minute, it will only take a minute. Build Log - 4x12's Trunk Firing 6th Link to comment Share on other sites More sharing options...
757lmj Posted June 23, 2015 Author Report Share Posted June 23, 2015 Ok thanks for the help both of u Link to comment Share on other sites More sharing options...
reedal Posted June 23, 2015 Report Share Posted June 23, 2015 Where are you located? 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...
757lmj Posted June 23, 2015 Author Report Share Posted June 23, 2015 Where are you located?harrisburg pa area. 717 Link to comment Share on other sites More sharing options...
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