Gain Setting Question
Ultimate HDF Member
Joined: Mar 2015
Posts: 6,446
Likes: 873
From: TEXAS
Originally Posted by SBates08
Then there's this.
Attachment 595657
Attachment 595657
And move to an exterior room. Signal sucks.
Luv
T
Last edited by Tailwind; Sep 20, 2018 at 04:22 PM.
Seasoned HDF Member
Joined: Jan 2013
Posts: 10,637
Likes: 1,246
From: Lake, Ms
Originally Posted by Tailwind
SBates. Plug ur phone in man. Battery is getting low.
And move to an exterior room. Signal sucks.
Luv
T
And move to an exterior room. Signal sucks.
Luv
T
Seasoned HDF Member
Joined: Jan 2013
Posts: 10,637
Likes: 1,246
From: Lake, Ms
Originally Posted by yooperhog
well, one says 18 volts, one says 27, and i know ya not gonna throw 27 volts at a 2.7 ohm 6.5....
Thread Starter
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Seasoned HDF Member
Joined: Jan 2009
Posts: 12,686
Likes: 8,291
From: Ottawa, Ontario
Thread Starter
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Seasoned HDF Member
Joined: Jan 2009
Posts: 12,686
Likes: 8,291
From: Ottawa, Ontario
So my CV B52 with Kappa 62ix speakers has to be dialed down to produce 75 watts??? Guess I'll pull the B52 and put the Elf 2125 back in then seeing how I only need 75 watts. Heck a Hogtune amp does that.
As mentioned earlier, nowhere, when looking up setting gains with a DMM, is there ever any mention of taking into account the speaker RMS rating. Pretty important piece of the equation missing, probably should be added to the Sticky, don't you think?
This will be kept simple. Follow the KISS method here. 1 MAJOR factor is using head unit at 3/4 volume or having the proper tools to know your head units max volume prior to clipping. Must have bike RUNNING when setting gains.All enhancements, bass,treble etc all set flat. Use a good true rms multimeter. Use the Chart I am providing. Save yourself the headache of the math. It all works the same be it bridged or not. 4 ohm is 4 ohm. 2 ohm is 2 ohm. I am also providing link to test tones. There are others out there but you really only need the 1 khz tone for 99 % of builds on this forum. I advise using the -5 db tone for some gain overlap
So anyone who literaly follows the above instructions to the letter could blow their speakers....???
As mentioned earlier, nowhere, when looking up setting gains with a DMM, is there ever any mention of taking into account the speaker RMS rating. Pretty important piece of the equation missing, probably should be added to the Sticky, don't you think?
This will be kept simple. Follow the KISS method here. 1 MAJOR factor is using head unit at 3/4 volume or having the proper tools to know your head units max volume prior to clipping. Must have bike RUNNING when setting gains.All enhancements, bass,treble etc all set flat. Use a good true rms multimeter. Use the Chart I am providing. Save yourself the headache of the math. It all works the same be it bridged or not. 4 ohm is 4 ohm. 2 ohm is 2 ohm. I am also providing link to test tones. There are others out there but you really only need the 1 khz tone for 99 % of builds on this forum. I advise using the -5 db tone for some gain overlap
So anyone who literaly follows the above instructions to the letter could blow their speakers....???
Last edited by roussfam; Sep 20, 2018 at 06:48 PM.
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Seasoned HDF Member
Joined: Jan 2009
Posts: 12,686
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From: Ottawa, Ontario
That would be 270 watts. That'll get you some magic smoke real quick.
Attachment 595661
Attachment 595661
Thanks, Jim
Last edited by roussfam; Sep 20, 2018 at 07:05 PM.
Road Warrior
Joined: Sep 2017
Posts: 1,401
Likes: 123
From: Sussex, WI
Keep the b52 as it will open up the possibility of using other 4 ohm speakers in the future. The other not so much. Also it is never a bad thing to have head room left In the amp. It will run cooler and last longer
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Grand HDF Member
Joined: Sep 2016
Posts: 3,522
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From: South Texas
27volts is wrong.
Equation is square root of the product: (power x resistance). Have to first multiply watts times ohms, then take square root of that product. In the example, voltage should be square root of 270 (which is ~18).
Wrong answer of 27volts was derived by taking square root of power (100) then multiplying resistance (2.7).
Equation is square root of the product: (power x resistance). Have to first multiply watts times ohms, then take square root of that product. In the example, voltage should be square root of 270 (which is ~18).
Wrong answer of 27volts was derived by taking square root of power (100) then multiplying resistance (2.7).
Seasoned HDF Member
Joined: Jan 2013
Posts: 10,637
Likes: 1,246
From: Lake, Ms
Those Kappas will take 125-150 watts all day long. If you are still at this point in the conversation, just jumping up and down to set your gains with a DMM, 18v will get you 125 watts and 20v will get you 150 watts. Finish it by ear!!!!!!! Do not set with DMM and leave it there.
