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Discussion Starter #1 (Edited)
Hello all,
noob ? here
I would like to use the Radio Shack SPL meter # 33-4050 "newer" analog [circa 2007] & Owners Man.
- this has a RCA (phono) output
to measure the impedance of a raw driver , then FR of a build , etc
with a laptop model DELL iinspiron 1520
- that has a built - in 1/8" mic input & headphone output.
I have read up on the impedance measurement custom wiring , but am a bit lost about the details.
:help:
Thanks in advance.
:foottap:
EDIT:
nope need an external device :
<http://www.hometheatershack.com/forums/spl-meters-mics-calibration-sound-cards/10001-rew-cabling-connection-basics.html>
"LAPTOP Note:
If your laptop is limited to a mic-in port with no line-in, then you'll require an external USB soundcard."
:spend:
 

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Registered
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25 Posts
Discussion Starter #3
Turns out that I would need an external I/O device (USB) between the Radio Shack SPL 33-4050 &
the DELL inspiron 1520 laptop :
because the laptop does not have actual audio line ins / outs.
Gona try a Zoom H4 (that I already own) as the mic.
It has a USB ouput :
h4_10_800xUSB2.jpg
Now the only issue is with this laptop's outputs.
I going to try to use the headphone 1/8" output.
Any advice
:help:
Best regards.
 

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It is fine to use the headphone out, but make sure that there aren't any audio effects turned on.

The Zoom H4 is perhaps not ideal, as its mics are cardioid rather than omni, but worth trying it. See if the measurement results vary much as you change the direction the mic points.
 
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