Love4sound
Well-Known Member
I have dual LV12F and ran into a problem with one sub. Both subs at same location and gain values are having a different frequency response, gain and delay values.Reached rythmik support who acknowledged this is not normal and have agreed to ship a new amp from us. So to explain in detail about the issues, I have one sub A in front and sub B at the rear. Both are rythmik LV12F. When I swap and measure them there is variations with the base frequency respone and gain which makes it difficult for dual sub calibration.so I have 4 images below. Image 3&4 is the biggest problem for me.How can identical subs have such variations. Let’s see how rythmik resolves this issue.
Image 1
Sub A(orange graph)and B(red graph) kept in the exact same location in the front. Same gain values,cables but variation of 3-5 dB and sub B and also see how attenuation is at 28hz. It doesn’t go all the way like sub A to 20hz.
Image 2
Sub A(orange graph)and B(red graph) kept in the exact same location in the rear. Same gain values,cables but variation of 3-5 dB with sub B
Image 3 and 4
Combined response of sub A and B. Red graph is with Sub A at front and Sub B at rear. Blue graph is both subs swapped but huge variations with frequency response. I need to change delay values to get better response
Image 5
Measured both subs at front with the u-mik kept close to the sub and not MLP. Here also same issue where sub B has 2-3 DB variation and starts to roll off at 28 DB.
Image 1
Sub A(orange graph)and B(red graph) kept in the exact same location in the front. Same gain values,cables but variation of 3-5 dB and sub B and also see how attenuation is at 28hz. It doesn’t go all the way like sub A to 20hz.
Image 2
Sub A(orange graph)and B(red graph) kept in the exact same location in the rear. Same gain values,cables but variation of 3-5 dB with sub B
Image 3 and 4
Combined response of sub A and B. Red graph is with Sub A at front and Sub B at rear. Blue graph is both subs swapped but huge variations with frequency response. I need to change delay values to get better response
Image 5
Measured both subs at front with the u-mik kept close to the sub and not MLP. Here also same issue where sub B has 2-3 DB variation and starts to roll off at 28 DB.
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