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About mothra
- Birthday 07/03/1981
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Cars, Sports, Science, just about anything.
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Bought DD-1. Need guidance on setup
mothra replied to wdelarme's topic in SMD Distortion Detector (DD-1) Topics
keep in mind that the DD1 is measuring audio signal. just because you are hearing distortion doesn't necessarily mean you have a distorted audio signal. your speakers may be creating the distortion. also keep in mind that setting your gains with the DD1 is getting the most power out of your amp without distortion. example, if you set your gain to 34 without the red light but it comes on at 35. if you boost a frequency, it's like turning the volume up to 35 on that one frequency. -
the AMM1 is measuring live, so if there is no load there's no measurement. if you have a resistor pack you could use the AMM1 to help set gains. resistors with a high wattage rating become very expensive very quickly. i'd just fork over the money for a DD1 or DD1+. now if you can get a measurement without a load, that's beyond me of how you could make that happen without a resistor of some sort.
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Where to connect single yellow wire?
mothra replied to Dragonsyph's topic in MechMan Alternators and 12v Accessories
a wire that has 12v only when the vehicle is running -
Does subwoofer ohm load matter
mothra replied to Rcabrera11's topic in SMD Distortion Detector (DD-1) Topics
even if your amp did create a dirty signal at .5 ohms compared to 1 ohm, you can't get rid of that. that's an amp issue. the DD1 is helping you get the gain matched to the signal output from your source with overlap if desired. -
it's not louder. it's lower in volume by 10db from the original 0 db recording. so when you set the gain with a 0 db tone it'll be at x location, then when you go back to set a 10 db overlap your amp's gain will be set to play 10 db louder to equal the original 0 db tone. test, play tone and set amp with a 0 db test tone then meter it on that tone. then play -10 db tone then set amp gain then play test tone and meter it again. those numbers should be equal to one another. so when you play music which is usually recorded at -3 db to -7 db, it'll still be clean power b/c if it does distort or clip it'll be in such minimal intervals that it won't or should damage anything.
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yellowtop upfront xs in back
mothra replied to loosescrew's topic in XS Power Batteries / Chargers! (and other stuff too)
i'd isolate the yellow top, resting voltage is 13.1 on those. -
DD-1 Lack Of Signal Question
mothra replied to Joe50302's topic in SMD Distortion Detector (DD-1) Topics
i wasn't pointing out the difference in volume level, I was pointing out that I've had distortion at different volumes when taken at speaker level at the amp and RCA on the same exact vehicle. not saying it's broken, just giving the OP a perspective to possible try at speaker level instead of RCA. -
DD-1 Lack Of Signal Question
mothra replied to Joe50302's topic in SMD Distortion Detector (DD-1) Topics
just me personally, i have had varying results going directly to the RCA. on my one of my personal vehicle I have a Pioneer 720BT. Through the RCAs by the amp it would say 1k distortion at 56 and 40hz distortion at 52. then plugged into the amp with connection at the amp speaker terminal, distortion at 61 on both 1kHz and 40hz. while this isn't something that happens all the time, I've just gotten to the point that I only connect via speaker level at the amp or deck.