 Hello everybody and welcome back to my channel. There's a little something I'll share with you With these kits, I know this isn't a standard kit. It's got these funky capacitors on the stuff But with these kits They come with a one-home one-watt resistor here and In my other videos on these are link them in you can see the difference between you know if you're Using these kids you see where we are. We sit around about 0.1 Total harmonic distortion slightly under 0.1 Now I've been just been playing around with it and what I've done is on this I've actually put a 10-ohm resistor in Still one watts, but 10 ohms and And The results are the results are pretty good. So we're not going to go through the whole lot again It's not gonna be a long video. I want to take it straight over to the screen here I'm just going to show you the results of it and this is all at 25 volts So we've got the 25 volts negative here virtual ground here. We've got a 25 volts positive here I can tell that off now We're going into eight ohms. I've not tried it with four ohms. We're going into eight ohms and We're using the same Scope here and the Digilent analog Discovery 2 All right, so let's take a peek at the results now first of all this is the This is the distortion total harmonic distortion And here we start coming out 20 Hertz Let's get there 20 Hertz and We're at 0.1 2 3 8 4 and you see these numbers at the top right up here, okay? and as we go into 30 Hertz or at 0.8 6 0 and then we're going to 40 Hertz 0.6, let's not bore life out of ourselves. We get to 100 Hertz or on 0.04 we go through next day kill be 300 Hertz 0.0455 We're here 0.445 0.0455 Now we're at 4 kilohertz. Yes 0.044 Now we're at 10 kilohertz 0.042 We are a little bit of 0.05. That's my crazy cat That's that's a 14 and a half kilohertz and as we get to the 20 here. We're at 0.035 Very good. That is a definite improvement From before now we look at the secondary harmonic here We can see that's all the way down right from the start 0.037 I'm going to go through the whole lot trying to make this quick as possible 0.032 All the way down. Let's try to find a peak somewhere. Let's say about there 0.028 that's not much of a peak is it but even down here 0.00972 Yampy cat if you can hear me it's my cat just jumping about the place now we're going to look at the Total harmonic distortion plus not noise versus power Now we come in of course we're coming at 1 millivolts and we're going all the way up to 100 watts But it will cut out at 1% because I've told it to soon as we get to 1% that's it shut the test down So as we're coming in the power was going up and we get to the first stage here and the power we can see over here The power we can see we're at 2 watts number 28 there now We're at 2 watts here and it's 0.03 And as we go across to the next line 3 watts 0.03 But we're going to skip across a little tiny bit here to 7 watts of 0.04 We'll skip up to 15 watts 0.05 22 watts 0.04 and we get all the way to 25.9 I say 26 watts at 0.04 Again, that's better That is better Frequency response. Well, I'm glad to say the frequency response is still pretty darn good Well, we start off here at 20 Hertz and we are if you look over here You get to see what the DB is for our gain and you also get to see what the DB relative to the input signals So at 20 Hertz we're at 0.2 zero DB We go to where it sort of looks like it sort of peaks up to the highest part there and then with DBR is 0.06 and We're at 27.1 DB and that's at 50 Hertz basically we go all the way across. It's a lovely even flat response No real deviation only measurable in the In the tens of milli DB And this is when we're at that's at 30 Hertz. So really worry me measuring to here anyway, and we are still 27.0 DB so No great fluctuation or anything like that That's much better. This is a lot better now. We can see it's definitely under the Let's go back to THD definitely underneath that zero point one Percent where we were before you're basically just sticking just under. I mean it is now speck And this is not a bought chip No store-bought chip. This is just the chip that is supplied with it So it is basically the kit Just find 10-ohm resistors one what stick them on there So we're just gonna tack on a little bit of music on to the end of this See what you think to this? This is another freebie It's a track called Motivate sound Alex Sorry if I mispronounced that 176 kilobits mp3 Bad at all from where I'm sitting Doesn't sound bad at all From my position here even if it's just running that one speaker it sounds great sounds absolutely great I Don't know you can actually beat these for a little tiny what it is for a little tiny setup like that I don't think there's a way to really beat it There that's my opinion. I hope you enjoyed the video Catch you in the next one