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Silver Member Username: OglejustPost Number: 171 Registered: Aug-06 | if my head unit is 1.8mv rms and 4 volts max what should the gain be on my amp? |
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Silver Member Username: HighstonePost Number: 272 Registered: Mar-06 | i believe it should be the same as your head-unit's voltage.. so i believe it should be 4 volts... I would get someone else's opinion as well.. |
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Gold Member Username: DrsmithMontana USA Post Number: 1069 Registered: Nov-04 | go to subwoofertools.com and they have a section about setting the gain, go buy a $15 dmm and use the tutorial and the website, i doubt it should be 4 on the amp though |
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Silver Member Username: JohnfiacIL USA Post Number: 486 Registered: Mar-06 | that means it porbally depends on how your HU is setup, do you have extra bass\subwoofer options on it? it may be adjustable to change higher and lower.. |
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Silver Member Username: OglejustPost Number: 172 Registered: Aug-06 | umm it has loud but its off. and the bass is at 0. |
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Silver Member Username: JohnfiacIL USA Post Number: 487 Registered: Mar-06 | Set your Bass at 1\2 its max and LOUD is really just optional, i would keep it off if your looking for SQ, but if your going for more SPL, you may want to turn it on.. it tends to distort at lower volumes with it on then with it off |
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Silver Member Username: KenwaPost Number: 338 Registered: May-04 | Loud is not just optional, it is not good to use the loud setting at high volumes. The loud setting is to bring out the depth in the music at low volumes. |
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Silver Member Username: PhuktupbassheadPhoenix, Arizona United State... Post Number: 508 Registered: May-05 | There's ways to set it by ear (which i've found to be the common preference of people on this forum - in the past). Gimme a bit... I'll get back to you with a GOOD website that will TEACH you what you want to know, instead of us just TELLING you. Besides, I feel stupid when I act smart and I know I'm not - vs - being smart enough to do something helpful. lol Sound good, bro? Check back on this thread later. OK? Peace. |
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Silver Member Username: PhuktupbassheadPhoenix, Arizona United State... Post Number: 509 Registered: May-05 | Well, I'm back! Faster than we both expected, I'm sure... Your gonna love these 2 websites, man. Anybody else out there who would like to LEARN - you wouldn't be wasting your time to check these out!!! 2 of my personal favorites when I was diving in... (all refered to me by past members on THIS FORUM - of course!) ECOUSTICS RULES! lol Anyways, FIRST read this: http://www.lenardaudio.com/education/01_eduintro.html any and all parts that interest you THEN go here: http://www.bcae1.com/ #63 is the one you are looking for, but don't be surprised if you spend MUCH longer than you expected playing with all the tools it includes. Truely a GREAT website!!!!!!!!!! I know, I know, I overdid. lol Take care... and BOOM RESPONSIBLY! lmfao Peace. |
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Silver Member Username: PhuktupbassheadPhoenix, Arizona United State... Post Number: 510 Registered: May-05 | Damn! I just had to float around that site again... it's the f,u,c,k,i,n,g s,h,i,t! Don't you agree?!?!?! ha ha If anyone wants to donate to the "Help Sean Buy Subwoofers He Can't Afford Foundation" - let me know. I'll start up a telethon if thats what it takes. lol ok, I'm done with this thread - I promise. lol (I'm ON ONE tonight. Can you tell???) lmao |
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Gold Member Username: TheelfkeeperStockbridge, GA USA Post Number: 3160 Registered: Feb-05 | Sqrt(Watts RMS X Ohms) = VAC take the square root of the RMS power and load. that'll give you the AC voltage you need at the amp output. Play a test tone, 50Hz for subs, 1KHz for mids and highs, and use a DMM to adjust the gain until you reach the calculated voltage. not totally accurate and an Oscilloscope would be best but its a great place to start. |
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Gold Member Username: Logan__tilleHamilton, Indiana United states Post Number: 1425 Registered: Feb-06 | http://mobile.jlaudio.com/support_pages.php?page_id=143 |
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Gold Member Username: TheelfkeeperStockbridge, GA USA Post Number: 3168 Registered: Feb-05 | ^ only works for JL's slash series amps ^ |
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Silver Member Username: JohnfiacIL USA Post Number: 532 Registered: Mar-06 | I have a question about this... say i use my eq. that is built into my HU and boost it to +6db does that raise my preout voltage\cause clipping at the same volume i tuned it to at max? And what about subwoofer level?My sub level is at 4 and will goto 8 |
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Gold Member Username: TheelfkeeperStockbridge, GA USA Post Number: 3181 Registered: Feb-05 | yes, any adjustments you make like that can have an affect on the pre out. you should set the gains with everything flat first and see if setting them properly fixes any need for boosting any settings imo. boosts are usually set at a certain frequency too btw, like 45Hz. so if you set the boost at +6, go back and check the AC voltage at 45Hz if thats what the frequency is for your unit. if its higher then its suppose to be, you might wanna lower the gains some. |