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Pass Labs B4 crossover questions
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Old 21st April 2018, 05:35 PM   #301
luxwinter is offline luxwinter
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Nelson, did you have a chance to look at the measurements of the HPD drivers made by fabrice63?
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Old 21st April 2018, 07:27 PM   #302
Nelson Pass is offline Nelson Pass  United States
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Pass Labs B4 crossover questions
No. I was unable to access from the link.
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Old 21st April 2018, 07:42 PM   #303
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No. I was unable to access from the link.
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Old 21st April 2018, 07:46 PM   #304
Nelson Pass is offline Nelson Pass  United States
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Pass Labs B4 crossover questions
OK, now who's gonna plot those out in dB for me?

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Old 21st April 2018, 07:57 PM   #305
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not me , Bubba

dumb for that

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Old 21st April 2018, 09:12 PM   #306
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Pass Labs B4 crossover questions
How do i convert voltage to dB?

Pass Labs B4 crossover questions-tannoyhpd385-chart-png

dave
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Old 21st April 2018, 09:27 PM   #307
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Nice job man ;-)

regarding the db conversion , I was asking myself the same question, but what db are we looking after , dbv or dvu , both ?



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Last edited by fabrice63; 21st April 2018 at 09:31 PM.
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Old 21st April 2018, 09:37 PM   #309
MEPER is offline MEPER  Denmark
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There are dB calculators on the internet. E.g.
Decibels to Voltage Gain and Loss convert calculation conversion amplification amplifier electronics - sengpielaudio Sengpiel Berlin


dB is 20 * log(Vout/Vin) ...if it is voltage amplification.


I guess you should just set Vin = 1 and then use your values as 20 x log(V) for all the voltage values.
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Old 21st April 2018, 09:50 PM   #310
nzlowie is offline nzlowie  Australia
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Here is the result, bigish dip in the 3500 to 500hz area.
This measurement was inside so bass is a bit over the place.

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