Tech Square Technical and speculative discussion of amps, cables and other topics.

---

[ Follow Ups ] [ Post Followup ] Thread: [ Display  All  Email ] [ Tech Square ]

---

[ Alert Moderator ]

---

Re: Measuring output voltage from CD, preamp, amps- How to?

Posted by jcox (A) on June 12, 2005 at 16:37:47

In Reply to: Measuring output voltage from CD, preamp, amps- How to? posted by No Disc on June 9, 2005 at 11:27:30:

cheap multimeters do not measure ac amplitude very accurately, check for the frequency response spec in the meter's doc

your pc sound card is likely to be the much better measurement device, except that they are not calibrated despite having excellent ac flatness over the audio range (+/- some cheap ac decoupling circuits not going down to 20 Hz)

a lightly loaded cmos schmidt trigger oscillator or clocked cmos flip flop will swing to within <1% of the rails if lightly loaded, allowing a home brew ac calibration source that only requires dc measurements of the logic supply and attenuator division ratio

with some sw oscilloscope and audio analyzer freeware for your sound card you can learn a lot more about your audio electronics with a pc than with a cheap meter

This post is made possible by the generous support of people like you and our sponsors:

Kimber Kable

---

[ Top of Page ] [ Contact Us ] [ Support/Wish List ] [ Copyright © 2025, Audio Asylum, all rights reserved ]

---

[ General ] [ Speakers ] [ Tubes ] [ Vinyl ] [ Digital ] [ Hi-Rez ] [ Video Asylum ] [ Cables ] [ Tweaks/DIY ] [ Music ] [ Films ]

---