Looks interesting.

 

Several of us here have that tool. It provides a fast and easy way to ensure that the signal being sent to the speakers is distortion free. It is also used to determine at what volume level a HU will start to distort. Google or search YouTube for DD-1 and you will find several instructional videos.

 

you can do that with a voltmeter, set it to DC volts.

music is ac voltage- sine waves

distortion is a square wave- which the DC meter will see if it is generated within the headunit or amp.

a meter will not show distortion generated by a speaker reaching limits- but your ears will

Mike

 

And the use of ohm's law.

 

Something else. https://www.delcity.net/store/Perma!...6y8RoCmcjw_wcB

 

They work well.

Mike

 

Did you mean AC Volts or have I been doing something wrong?

 

I think he is talking about using the DC side of the DMM to identify distortion levels of the HU and amp.

I have the SMD DD1 so I'm not gonna burn my few brain cells on learning his technique but it would be a good topical read to see exactly how he does it and how it compares to a distortion meter.

T

 

 

This little nano o scope is simple, cheap, and will show you where you clip.