Another Gain Setting Q

[ewood05 10+ year member]

Alright, I just bought a dmm and set my gains using the tutorial method. I used at 60hz tone at -3 dbs. I set it so that i got the calculated 40v ( a little past half gain). Then I noticed that when I played other test tones 40, 45hz, etc; the meter would go past 40v more like 50. Is this ok or not?

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[ewood05 10+ year member]

bump anyone?

 

[Ali1 10+ year member]

use a 45hz test tone. I had a similar problem and it turned out 60hz is too high to use as a test tone.

 

[ewood05 10+ year member]

Oh Ok thanks, I was just going by the tutorial.

 

[ewood05 10+ year member]

can someone explain why all test tones don't keep the same voltage?

 

[BassAddictJ 5,000+ posts]

differant freqencies require the amp to draw differant amounts of power, some notes are harder to make for the amp....

 

[Decipha 10+ year member]

uhh thats not entirely correct bassaddictj

the reason why a 60hz tone gives lower power than a 45hz tone is because the 60hz tone is closer to the crossover point... if you turn the LPx-over off you shouldn't have any difference in output between a 60hz and a 45hz... also keep in mind that not all tones are made at 0db, some clip, some are a -3 db... make sure all your tones are at the same volume level

 

[ewood05 10+ year member]

oh ok thanks, i'll try it again with the crossover off.