venturac Posted April 5, 2012 Report Share Posted April 5, 2012 This has been a big question of mine lately. I have 2 12" CVX 4 ohm with a PPI PC21400 amp. I have read how to set it with a multimeter, and that's what I did. 1400 watts X 4 ohms and then take the square root of that. It's ~74 volts. I used a 60hz test tone burnt on a CD using Audacity. I have a Pioneer AVH-P3400BH and set the volume to 30/40. I really don't know when the head unit starts to clip. I've never turned it up that far before. I also have a Sony XM-754HX 4 channel running my mids and highs and it doesn't distort. I had to turn the gain to damn near more than 3/4 of the way on my PPI to get 74 volts. I'm not sure if I did this right or not. Seems like it. Even thought the speakers can handle 1500 watts max, I don't want to distort them. I also used the dock connector in my HU to play Pandora and other music on my iPhone. The head unit has a feature that keeps all levels the same so once source isn't louder than another. I also noticed that with a different test tone at the same volume the voltage changes even though it's at the same gain level. The head unit also has a "loudness" feature. Level 1, 2, or 3. I usually keep this off, but this also changes things. Should I keep this off? Can anyone give me some feedback on this? Quote Link to comment Share on other sites More sharing options...
RickyFriery97 Posted April 5, 2012 Report Share Posted April 5, 2012 Use a O-scope or a DD-1 Quote 2014 Chevy Silverado Crewcab 1994 Chevy Full Size blazer Link to comment Share on other sites More sharing options...
venturac Posted April 5, 2012 Author Report Share Posted April 5, 2012 how much for an o-scope Quote Link to comment Share on other sites More sharing options...
Sanitarium Posted April 5, 2012 Report Share Posted April 5, 2012 how much for an o-scope bout $90 .. google DSO nano. otherwise.. several hundred for a bench unit. Quote Link to comment Share on other sites More sharing options...
KOZ89 Posted April 5, 2012 Report Share Posted April 5, 2012 google DSO o-scope, try this one http://www.amazon.com/Seeedstudio-DSO-Nano-oscilloscope-V2/dp/B004DE31U0/ref=sr_1_1?ie=UTF8&qid=1333643170&sr=8-1 or simply just search for one, not that hard, see what you come up with and ask people what would be the best choice Quote build coming late April, early May build log for 1 LVL 5 18" 87%ish done : http://www.stevemead...ab-dc-lvl-5-18/ 1997 Dodge Ram 1500 Slt Laramie Amplifier - AQ3500d.1 Sub - DC LVL 5 18" Highs - (2x) Selenium ST-350 Super Tweeters 8ohm Mids - Selenium 6" 200w midrange 6W4P (pair) Mids/Highs Amp - MB Quart ONX4.125 1000watt 4 ch Wiring - XP Flex 25' Red, 25' Black Alternator - Mechman 270amp Battery - XS power D3100, 1- Yellow top front more to come... Link to comment Share on other sites More sharing options...
HunterJohnson Posted April 5, 2012 Report Share Posted April 5, 2012 get a dd-1 or go to a shop that has one. You'll be surprised at how nice/bad your equipment is and the signal your amp is receiving and your speakers. Quote Scion tC SQ BuildiPad mini, lots of fabrication, daily drivenFord Explorer C Pillar Wall Build Just a cheap car to destroy with bass Link to comment Share on other sites More sharing options...
RobertJasonRuiz Posted April 5, 2012 Report Share Posted April 5, 2012 has anyone use the nano one was also lookin for one myself ?.. Quote Link to comment Share on other sites More sharing options...
venturac Posted April 5, 2012 Author Report Share Posted April 5, 2012 it looks like the o-scope is cheaper than the DD-1. I have read that when clipping or distortion occurs the sound waves will look flat. Is this the case? Quote Link to comment Share on other sites More sharing options...
Lbox88 Posted April 5, 2012 Report Share Posted April 5, 2012 (edited) it looks like the o-scope is cheaper than the DD-1. I have read that when clipping or distortion occurs the sound waves will look flat. Is this the case? a heavily clipped one will have flat spots at the peak of the signals. Light distortion will just make the signal look a little fuzzy. Edited April 5, 2012 by Lbox88 Quote UBL | Build Log Link to comment Share on other sites More sharing options...
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