Follow along with the video below to see how to install our site as a web app on your home screen.
Note: This feature may not be available in some browsers.
Elaborating a bit. I would use three resistors: one to act as dummy load for the amplifier, and then two to make the attenuator:
Word of caution. If the speaker is driven from a bridged amplifier, you cannot hook SpkrL to the grounded input to the sound card. Unfortunately, computer sound card line and mic inputs use the computer case as a common ground, which is connected to earth ground via the power line. I have had to use a transformer to provide isolation to solve this problem.
...A bridged amp is no problem, you simply take the out put from one of the speaker connections, and the other from chassis.
Hi All,
I have a audio signal from an amplifier, that is meant to drive a power speaker. I now what to use this signal into a sound card.
Is there a simple solution?
Kind Regards,
StudentSA
Except for the fact that the output of a bridged amp is biased at about 6Vdc (Half the supply voltage). You might need a DC-Blocking capacitor.
Also, I have tried running solid-state amps unloaded (or loaded only by ~5k) and the audio output was not well behaved. It had a lot of overshoot/ringing on it...
IMHO, the signal CAN be noisy too if a High Power amp is used.
And cheap to implement.
Thanks Nigel,
Two 1/4 watt resisters should do the trick like this?
(Audio+) ----- (10k Resistor) --X-- (1k Resistor) ----- (Audio-) X
I would then tap a points X to my sound card?