How to measure the required power for each driver? At 1 khz is correct? 2W D class is enought?

Jump to Latest
inetboy

inetboy

Member
Joined 2012
#1
My mesuarament is correct? Example. At 1khz, 8 Ohm rezistor voltage is 50mV-150mV for normal too high volume. This means requared power is 0,15/8= 0,01875A. 0,01875*0,15=0,0028125w. Is this real? What i'am doing wrong? Driver ir FaitalPro 6rs140. This means enought power for one driver i some 1W? Can i use D class amplifier 2 x 2W? This is for active connection in 3way system. For each channel 2w enought? Watching at D class PAM8803 chip. Drivers is 10rs350, 6rs140, SB26STCN.
Link to system https://www.diyaudio.com/community/...italpro-6rs140-10rs350-need-some-help.393606/
1678266217235.jpg

DSC07144resize.jpg
 
#5
AllenB said:
Would you consider connecting your scope to the driver while you listen to it?
Click to expand...
claudio said:
Check if your voltmeter is capable to measure correctly a 1K Hz sinusoidal signal: most of them get till 400Hz.
A faster formula than the one you used: W=V*V/R
Click to expand...
With 6rs140 driver
98mV 40hz
105mV 100hz
101mV 200hz
96mV 400hz
97mV 1000hz
94mV 2000hz
75mV 3150hz
74mV 4000hz
26mV 5000hz

With 8 ohm rezistors
97mV 40hz
97mV 100hz
98mV 200hz
98mV 400hz
97mV 1000hz
94mV 2000hz
74mV 3150hz
49mV 4000hz
25mV 5000hz

1678277179644.jpg
 
#7
When I measure with a scope, I play normal music and it free-runs. The speaker is crossed. I look for the peak speaker Voltage needs.

Whether this is something you pursue, I note it as an example because it does give an accurate view of the situation.
 
  • Thank You
Reactions: inetboy
#8
AllenB said:
When I measure with a scope, I play normal music and it free-runs. The speaker is crossed. I look for the peak speaker Voltage needs.

Whether this is something you pursue, I note it as an example because it does give an accurate view of the situation.
Click to expand...
I tried as you said. For a bass speaker, I have even seen 1 volt. For the middle 100-300mv. Different music, different indications. Thank you!
 
  • Like
Reactions: AllenB
You must log in or register to reply here.
Top Bottom