SMD "Distortion Detector"

3stagevtec · Postby **3stagevtec** » March 9th, 2011, 12:57 pm

A pretty cool lil device.. What y'all think??

nigel1977 · Postby **nigel1977** » March 9th, 2011, 1:35 pm

Now that is a great piece of equipment. I already have a digital 4ch oscope, but I wouldnt mind getting this.

Postby SR » March 9th, 2011, 1:54 pm

sweet
will look for availability of this next week

Aaron 2NR · Postby **Aaron 2NR** » March 9th, 2011, 2:09 pm

very nice

Soundstream_626 · Postby **Soundstream_626** » March 9th, 2011, 5:15 pm

whoa , that`s a must have device.

3stagevtec · Postby **3stagevtec** » March 9th, 2011, 6:49 pm

Question, how would impedance affect this, looking at the subwoofer only..

Lets say your box is tuned 40Hz, the amp might clip at volume 50 with a 40Hz tone, BUT may clip at volume 45 with a 50Hz tone.. We know that the impedance of an enclosure is lowest at the tuning frequency and then starts to rise from there..

ruffneck_12 · Postby **ruffneck_12** » March 9th, 2011, 8:00 pm

took my idea

silent_riot · Postby **silent_riot** » March 10th, 2011, 7:44 am

3stagevtec wrote:Question, how would impedance affect this, looking at the subwoofer only..

Lets say your box is tuned 40Hz, the amp might clip at volume 50 with a 40Hz tone, BUT may clip at volume 45 with a 50Hz tone.. We know that the impedance of an enclosure is lowest at the tuning frequency and then starts to rise from there..

The device looks like a good compromise on frequency ranges, one for mids, one for bass.
For the advanced users, an oscope would be more handy especially when tuning for what you mentioned, including enclosure efficiency.

As he demonstrated with the headunit, various frequencies can clip the device at different levels, which can bring about a concern for when tuning highs (in a 3 way system), or midbass (in a 4 way system) with just 2 out of band frequencies available.

I would like to understand a bit more about how the device works.

Sully · Postby **Sully** » August 3rd, 2011, 6:46 am

pioneer wrote:Woops i reposted

I see a big hoorah on DIYMA people claiming you can use a pocket o-scope for $80USD and get a more accurate setting

My question is aren't all those things (o-scope and SMD device) based on using specific frequencies, seeing most if not all of us listen to music which is dynamic, wouldn't setting gains using a fixed frequency as reference cause inevitable clipping at some point?

Do a a little more research into what an o-scope (oscilloscope) actually does. It's not the same. It's a tool that can be used, with a much wider frequency range than the SMD device.