Gain Setting Question
Thread Starter
|
Seasoned HDF Member
Joined: Jan 2009
Posts: 12,686
Likes: 8,291
From: Ottawa, Ontario
Originally Posted by SBates08
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.
Thread Starter
|
Seasoned HDF Member
Joined: Jan 2009
Posts: 12,686
Likes: 8,291
From: Ottawa, Ontario
A bit of clarification. My original question was basically how to figure out your amps output voltage when using speakers with 2.5 or 2.7 Ohm impedance since the amp manufacturers only post output at 2 and 4 Ohms. I now know that you ignore the amps output and focus on the speakers RMS rating.
I was a little frustrated so I apologize if that came across in my posts.
On a positive note, my Kappa 62.ii speakers are covered under warranty and I am getting a pair of 62.ix replacement speakers. Meanwhile my trusty old Polk MM651's are keeping the tunes flowing.
Thanks, Jim
I was a little frustrated so I apologize if that came across in my posts.
On a positive note, my Kappa 62.ii speakers are covered under warranty and I am getting a pair of 62.ix replacement speakers. Meanwhile my trusty old Polk MM651's are keeping the tunes flowing.
Thanks, Jim
Last edited by roussfam; Sep 21, 2018 at 08:08 AM.
Cruiser
Joined: Dec 2017
Posts: 173
Likes: 3
From: Deer Park 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).
Thread Starter
|
Seasoned HDF Member
Joined: Jan 2009
Posts: 12,686
Likes: 8,291
From: Ottawa, Ontario
When I was using the 62.ii speakers I had my amp set to all pass. I've read that I should have it set to HP and the head unit set to 80-90. Would this hold true for the 62.ix speakers as well?
Stellar HDF Member
Joined: Feb 2016
Posts: 2,170
Likes: 188
From: Manitowoc county
Thread Starter
|
Seasoned HDF Member
Joined: Jan 2009
Posts: 12,686
Likes: 8,291
From: Ottawa, Ontario
HD Forum Stories
The Best of Harley-Davidson for Lifelong Riders
7 Surprising Harley-Davidson Products that Are Not Motorcycles
Verdad Gallardo
8 Best Harley-Davidson Motorcycles Ever
Pouria Savadkouei
10 Worst Harley-Davidson Motorcycles Ever
Pouria Savadkouei
Killer Custom's Jail Break Is The Breakout That Refused to Blend In
Verdad Gallardo
Crazy Bunderbike Build Looks Amazing, But Is It Impossible to Ride?
Verdad Gallardo
Harley-Davidson Reveals Super Cool Cafe Racer Concept
Verdad Gallardo
Engraved Rebellion: Inside Bundnerbike's Glam Rock II
Verdad Gallardo
10 Motorcycles You Should Never Buy
Joe Kucinski
10 Things Harley-Davidson Needs to Fix in 2026
Verdad Gallardo
Ultimate HDF Member
Joined: Mar 2015
Posts: 6,446
Likes: 873
From: TEXAS
Originally Posted by roussfam
Thanks
U picking up what I'm laying down?
T
Last edited by Tailwind; Sep 22, 2018 at 07:05 AM.
Thread Starter
|
Seasoned HDF Member
Joined: Jan 2009
Posts: 12,686
Likes: 8,291
From: Ottawa, Ontario
Just reinstalled my B52 amp. Using the rapid tables linked in this thread I set my voltage to 24.64. Used 225 watts at 2.7 Ohms. (200@4 Ohms, 250@2 Ohms rating) Previously I was using 18 volts at a volume setting of 27 out of 35. I had to keep going over 27 to hear at highway speeds. With this new setting hopefully I can hear at a lower volume. My head unit has an option where I can turn off high gain, volume max of 35, and reduce it to volume max of 25. Hopefully I can live there.
jim
jim
Voltage = square root of Watts x Ohms
My B52 is rated at 200 Watts @ 4 Ohms and 250 Watts @ 2 Ohms
Why do all the voltage calculation examples for odd impedance speakers, 2.7 for example, always show the 2 Ohm Watts X 2 Ohm, why not 4 Ohm Watts X 4 Ohms? Neither one is accurate. If 2 Ohms is 250 Watts and 4 Ohms is 200 Watts, then 2.7 is somewhere in the middle, so I assume that one calculation would be too high, the other too low?? In this example wouldnt you calculate the voltage both ways and split the difference?
Jim
My B52 is rated at 200 Watts @ 4 Ohms and 250 Watts @ 2 Ohms
Why do all the voltage calculation examples for odd impedance speakers, 2.7 for example, always show the 2 Ohm Watts X 2 Ohm, why not 4 Ohm Watts X 4 Ohms? Neither one is accurate. If 2 Ohms is 250 Watts and 4 Ohms is 200 Watts, then 2.7 is somewhere in the middle, so I assume that one calculation would be too high, the other too low?? In this example wouldnt you calculate the voltage both ways and split the difference?
Jim