so confused smd distortion detector?

[optimusprime 10+ year member]

lol nice at least it caught that dudes attention now i wonder if hes actually who he says he is. also if he is do you think he is actually going to tell us how it works?

 

[DBfan187 5,000+ posts]

lol spend 119 on an oscope and i gaurentee youll set your amp will be set to clippingcheap oscopes dont catch very small amounts of distortion the wave will look perfect but its not...

A good oscope shouldnt cost less than 1k

an oscope is going to let you pull more than the SMD but the SMD has some of the aspects of oscope detection that just make it plain really easy.

nice try but the velleman oscopes work very good and are pretty accurate, it's also the easiest one to use.

 

[-01limited- 10+ year member]

Bump. Love how he came in and now hasn't said anything.

 

[Tony D'Amore]

Hey guys sorry for the late response, I am extremely busy these days.

It is patent pending

1. It is measuring the two frequencies and the relative amplitude of these frequency's harmonics.

2. 1k and 40Hz. 1k because it is an industry standard for power output, and right in the center of the human hearing range. 40Hz for the bandwidth limited subwoofer amplifiers.

3. A perfect amplifier will put out the same voltage loaded or unloaded. Of course only one amplifier like this exists in the world (the T15kW //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif ) The rest of them will put out more voltage when unloaded of course. This difference is typically 1 - 2 dBV. So setting with the amp unloaded takes the stress off the speakers and adds 1 -2 dB of gain overlap. Not a big deal. If the amplifier has a fully regulated power supply, then it has no effect what so ever.

4. It is better than an o-scope because clipping is one thing that can cause distortion, this can be easily seen on most o-scopes. But there are many other things that cause distortion that are very hard to see on an o-scope, esp a little hand held digital piece of junk just sayin

Here is a video to show you what i'm describing.

At around 1:40 you see distortion caused by clipping

At around 3:25 you see distortion caused by a DSP

At around 4:40 you see distortion and noise (the dd-1 ignores noise) caused by a cheap LOC

I can't post the URL so youtube "Car Audio Amplifier Gain Setting Device!"

1. What exactly is it measuring? Freq, harmonics, clipped signals?

2. Someone said it measures at 2 different frequencies....if so, which are they, and why are those one picked vs other frequencies?

3. How does it work with no load attached on the amp?

4. Why is it better than an o-scope? Can it do amps, processors, and decks?

 

[bubbagumper6 5,000+ posts]

Hey guys sorry for the late response' date=' I am extremely busy these days.
It is patent pending

1. It is measuring the two frequencies and the relative amplitude of these frequency's harmonics.

2. 1k and 40Hz. 1k because it is an industry standard for power output, and right in the center of the human hearing range. 40Hz for the bandwidth limited subwoofer amplifiers.

3. [b']A perfect amplifier will put out the same voltage loaded or unloaded.[/b] Of course only one amplifier like this exists in the world (the T15kW //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif ) The rest of them will put out more voltage when unloaded of course. This difference is typically 1 - 2 dBV. So setting with the amp unloaded takes the stress off the speakers and adds 1 -2 dB of gain overlap. Not a big deal. If the amplifier has a fully regulated power supply, then it has no effect what so ever.

4. It is better than an o-scope because clipping is one thing that can cause distortion, this can be easily seen on most o-scopes. But there are many other things that cause distortion that are very hard to see on an o-scope, esp a little hand held digital piece of junk just sayin

Here is a video to show you what i'm describing.

At around 1:40 you see distortion caused by clipping

At around 3:25 you see distortion caused by a DSP

At around 4:40 you see distortion and noise (the dd-1 ignores noise) caused by a cheap LOC

I can't post the URL so youtube "Car Audio Amplifier Gain Setting Device!"

1. What exactly is it measuring? Freq, harmonics, clipped signals?

2. Someone said it measures at 2 different frequencies....if so, which are they, and why are those one picked vs other frequencies?

3. How does it work with no load attached on the amp?

4. Why is it better than an o-scope? Can it do amps, processors, and decks?

I've tried to tell people that in the past and taken heat for it.

I would like to know more about how it measures the harmonics just because I'm in my 5th year of electrical engineering school and like to learn...if you don't want to give more details because it's proprietary, I understand. Also, I appreciate you taking the time to talk to us at all, I know how busy engineers are, so thanks.

 

[Imtjnotu 5,000+ posts]

finally some answers

 

[wenn_du_weinst 10+ year member]

double

 

[wenn_du_weinst 10+ year member]

Hey guys sorry for the late response' date=' I am extremely busy these days.
It is patent pending

1. It is measuring the two frequencies and the relative amplitude of these frequency's harmonics.

2. 1k and 40Hz. 1k because it is an industry standard for power output, and right in the center of the human hearing range. 40Hz for the bandwidth limited subwoofer amplifiers.

3. A perfect amplifier will put out the same voltage loaded or unloaded. Of course only one amplifier like this exists in the world (the T15kW //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif ) The rest of them will put out more voltage when unloaded of course. This difference is typically 1 - 2 dBV. So setting with the amp unloaded takes the stress off the speakers and adds 1 -2 dB of gain overlap. Not a big deal. If the amplifier has a fully regulated power supply, then it has no effect what so ever.

4. It is better than an o-scope because clipping is one thing that can cause distortion, this can be easily seen on most o-scopes. But there are many other things that cause distortion that are very hard to see on an o-scope, esp a little hand held digital piece of junk just sayin

Here is a video to show you what i'm describing.

At around 1:40 you see distortion caused by clipping

At around 3:25 you see distortion caused by a DSP

At around 4:40 you see distortion and noise (the dd-1 ignores noise) caused by a cheap LOC

I can't post the URL so youtube "Car Audio Amplifier Gain Setting Device!"

1. What exactly is it measuring? Freq, harmonics, clipped signals?

2. Someone said it measures at 2 different frequencies....if so, which are they, and why are those one picked vs other frequencies?

3. How does it work with no load attached on the amp?

4. Why is it better than an o-scope? Can it do amps, processors, and decks?[/quote']

thanks for explaining it and not following the usually smd I know so just trust me bs