 Hello everybody, Alecki Fun here, and welcome back to my channel, my V-LOG, and we have set up this Sima, Sim 5-3 Luskas, I'll stick it up on the screen, so there it is, it's all connected up, now I'm using the capacitor bank and this, well it's 35 volts, 0 volts, 0, 35 volts transformer, which gives me 42 volts, 0, 42 volts on the output here, once it's been rectified by the rectifier. Now the reason why I'm doing this is, well just because this would be the transformer I'd be using on it if I intend to use this amplifier at all, we're just going to see what it's going to be like with that. Now this is all the same as what the kit is apart from these output transistors, now I don't think they're really going to make much difference, I've tried these output transistors, these are store bought, they cost over £8 each, and I tried them on another amplifier against the cheaper ones that I got from our friends in the East there, no real difference, in actual fact it almost seemed like the amplifier that was set up with the cheaper ones performed better, I don't like saying things like that because it goes against the whole, but just in that instance, now that could be other factors in there that made it like that, for this, this is like this, and we're going to give it a go now, we're going to be using the audio analyzer software through the Analog Discovery 2, and first of all a quick little peek at the website again, at this, and you can see the board is, it's not that big, it's not such a big layer, I wouldn't mind getting one of these possibly, and we're going to have a quick look at this distortion, THD, this isn't THD noise, we'll measure the noise as well, and then we'll look at the THD, into one kilohertz of full power, it says at 0.002%, now that is one hell of a specification, alright, that is one specification, that is a good claim, and then we got a THD is 0.005 into 10 kilohertz, and full power, again, that's, you know, if you can do this, it's absolutely brilliant, it says you can get 100 watt, 100 watt at a voltage of 55 volts, plus minus 55 volts, we got a, sorry, 45 volts, we have 42 volts, plus minus, and it says it's going to work in voltage here, DC dual 20 volts to the 45 volts, I thought I saw one stage 50 volts, but according to this it says 45, I'm just going to have a quick look down here, because I thought I saw somewhere that said you could use 50 volts, we click on that specification, it's, yeah, right, so okay, that's good enough, actually on the board, if we look on the board here it says minus 35 volts and plus 35 volts, so, you know, make it out much of a world personally, I wouldn't go over the 45, and I'm not going to go over 42s, because I can't, all right, so let's, I've not even got this powered on yet, so we'll do the gentler tests first, so let's just go over to our windows, my workplace 4, there we go, we've got windows, I've already got the audio analyzer set up, I'm now just going to put down the power for our amplifier, and I'll go to full screen here, actually, all right, now the first one I'm doing is THD noise, and we're going to use, well it says to go full power, now, I don't want to do that, I'm basically going to go for the standard check, which is going to be point 2 of a volt, we've got both channels are going to be looked at here, top 10, 10% distortion, the bottom 0.001, we could go further down a scale, because this suggests it can go to 0.002, so this will go to 001, so let's just run that anyway, let's see what we've got, okay, well, it's included, so 20 kilohertz, we've got 0.11297, and that's on the pink, and we've got the 0.11725 on the blue, at 100 hertz, 0.09390 on the pink, 0.09732 on the blue, and we've got straight R1K here, we've got 0.10545 on the pink, and 0.1752 on the blue, we've got a 10K, 0.09797 on the pink, 0.10962 on the blue, and if we got a 15K, 0.104401 on the pink, 0.10801 on the blue, and a 20K, 0.0827, oh sorry, 0.0727 on the pink, 0.06383 on the blue, and if we get past the audio range and we're nearer or further the same, it drops off a little bit there, 0.05181 on the pink, and 0.05427 on the blue, and that's with the total harmonic distortion plus the noise, we just filter out the noise, it does look better, 0.08133 on the pink, and 0.08592 on the blue, down at 100 hertz, we have 0.05700 on the pink, and 0.06084 on the blue, that's nice, that's high five standard, on the pink again, this is at, where are we here, we'll just go to one colour, let's actually just keep it, 0.05589 on the pink, and 0.0627 on the blue, come down to 10, go as close as we can get to it, so 0.05557 on the pink, and 0.0956 on the blue, that's at 10k, we go to around about 15, 0.06767 on the pink, 0.07108 on the blue, and if we get around about 20, there we go, 0.06723 on the pink, 0.04555 on the blue, alright, so well, you know, the order of magnitude out of what's claimed on there, it looks better when you look at the second harmonic if you wanted to, so we can see the 0.0425 on the pink, and 0.065 on the blue, go through to 100, I'm not going to go through these all the time, it's up here, the numbers are up here if you can see them, just trying to help out there, but you can see where it goes down quite nicely, but we don't get, unless you're talking here on the blue, where we can actually get a 0.00157, that's at nearly 5kHz, but that's just hen picking the lowest point basically. But still, look good on the advert, we'd look good on an advert. The third harmonic is pretty much tracking together, 0.04 and 0.05, so what's it at the 20Hz, 0.06, 0.07, alright, so we're going to look at, I can't do the power versus frequency because it will, the input will exceed the input to my analog discovery here, and so what I'll do with this one is I'll actually connect it onto my earth scope, which has got a much bigger input, and we'll just do it, you know, the sine wave clipping way and do it like that, but we'll look at the frequency response, let's just drop this down to 3, so we've got 3 dB up and below. Again, we're going to do it at this output level, we will go up output level and do it again and just see what it's like, give it 100 steps, both channels 10 to 50kHz and we'll just run that like that. Well interesting, that even though they track very very similar together, you know as one bit rises the other bit does as well, same here, same here, there's dips, there's dips, there's still a gap there, but there we go, we can just look at that and see what it is, so yeah I mean you can see here 0.75 dB difference, 0.75 here, around about here would be 1 dB difference between these, so there's no way near like a 3 dB difference or anything like that, we are talking very small amounts, we look at 20 kHz, sorry, 0.05 dB difference on the pink and 0.08, sorry, minus 0.05 dB difference on the pink and 0.08 dB difference on the blue against the reference voltage. We're using 32 dB there as well, yeah and if we look over here all the way down here at 20 kHz we got minus 0.21 and minus 0.14, both of these, if we were to look around about 40, let's say 39, pink is minus 0.13 and the blue is minus 0.06, so you know still pretty good, I mean that is not particularly bad, but let's do it just for the sake of it, let's double the input, now this is going to take a little bit of voltage doing this, it gives it a nice warm up, but let's just see, we can see that for the way it is, we can see the peak there, let's just see what we get now by turning this off a bit, I want to see if there's any real difference, anything that can hit us straight away has been a big difference, alright so let's look around about 20, 0.06, 0.06, one's minus and one's plus, so the pink is minus, we've got to slide over the 0.0 DVR line there and down on the 20 it was 0.02, yes that's pretty much around about the same for that extra bit of stress, I'm going to just put that to there so I remember it, now we're going to go straight to the scope, what I expect to see is there's going to be some drop off at the lower frequencies, this is not, the L12 did better with this, absolutely better, it aligned pretty much perfectly along there and I think there was a little tiny bit of higher frequency gain with the L12 but we'll take a peek at the scope and see what this shows us, we're going for the square wave, we're going to keep that level around about the same as what we've been using, and we're going to go in at 100 hertz, 1000 hertz, one kilo hertz, take a single shot, okay, well there we can see there's our blue, a slight little time a bit more but nothing particularly bad there, we've got 23 volts peak to peak, 11.96, 11.96, well it's 11.96, so yeah I suppose that's 6.00, let's drop it down to 100 and take a peek there, all right we go there, a little bit of that travel still and we're dropping off now a little bit with the base, let's go down to let's say 50 for the sake of it, take a peek at that, okay, and what I'm going to do now is I'm just going to up the input, right, so I'm going to put that on 4 like we did on the frequency response, I'm just going to take a quick peek at it on 4, so the volume's going to be linearly twice as high, the twice amount of input, and sort of showed there a bit more of a peeking there, I can't really tell whether that's gone down but now we've got 54 volts peak to peak, 27 volts plus and 27 volts minus here, so that really didn't show that much to it, let's go down to 30, oh no we're just going down to the 20 just because that's the bottom of the range, okay well we can see we've got some action going on there, I'm going to drop this down because that might be a bit too high, I'm just going to put it back to 2, and do a little single shot there, so it makes a difference on your volume level, on your amount of input you've got in there, and yeah I mean it is running off, but we saw that on the frequency counter anyway, on the frequency response, and at 40 it looked like it was getting a bit more level, and yeah that's okay, right so the next one then we're going to go up to 5k and take a peek at that, yep that's okay, that's okay, it's hard to tell about the speed of this thing, it's loomed just because I don't know whether my equipment is good enough to be able to measure that correctly, 10,000 hertz, okay still pretty good, it's still a square wave, let's go to 20,000 hertz, okay, and 30, just to take a peek at that, okay well I mean it still doesn't look like a sinusoidal wave like we've seen some do, or even at random at 20 we've seen some of it like that, so that's not too bad, if I remember correctly it's not as good as the L12-2, if I remember correctly, now the other one that we can do now is the total amount of distortion against versus the power, but I can't do that on here because like I say my maximum input onto this is plus minus 25 volts, and it will clip and what we will see is the distortion of the input of my scope, the analog discovery rather than the distortion of here, so I'm now going to swap over onto the other oscilloscope and just set up for that. Alright, we're going to go to the home screen, and we're going to want this one, the chord screen on, very good, now we're going to go to the oscilloscope, okay we're going to get rid of that, we're going to turn that output on, so we've got both the setup on one time, 10 volts per division, and I'm recording the screen so you'll actually get to see this, so as I turn up the input you can see down the bottom look, you know what's going on there, I should really just put that over, and we're clipping on the bottom, clipping on the top, a little bit closer, we've got a little bit of a clip there, a little bit of a clip on the top, and we're going to say that's 26.45 volts, I'm just going to turn that off, 26.45 volts, that's reasonable, and we'll just have a quick look on the calculator, so by 26.45 times 26.45, then we're going to divide that by our 8 ohms, and we've got 87.45 watts, or you know, near as darn it. So yeah, that's not bad, considering we're not giving the full amount of input power it recommended, I'm pretty sure somewhere 50 volts plus minus 50 volts, but anyway, so yeah, that's what we've got, and I hope that was helpful, so I don't know what it sounds like just yet, but I will be having a little listen myself, I've got a funny famous, it's going to sound okay, but as for crossing notes against the L12-2, just from recollection, I do remember the L12-2 frequency response was flat out, and the square wave was most definitely better than the lower frequencies, it just corresponds with the frequency response, to be honest with you. So there we go, anyway, that's it, that's it for now for that one, I may do a side-by-side comparison, just with the outputs, like overlay or something, but I don't think we're in needy, you can go back and have a look at the L12 video, I'll stick that in the description, and see for yourselves, because I get asked this about the sound quality, we can tell by the numbers that the sound quality is going to be pretty good, if it was all over the place, it was really bad on the square wave, you can automatically say there's issues in there, but there doesn't seem to be any sort of issues, so you can sort of say it's going to sound pretty good, but this is the thing about the sound, it's going to be how I like listening to it, will be determined whether I say, hey, yeah, if it's not quite how I like it, then I'm going to think about it differently, but I'll tell you now that I tend to listen to everything flat, I don't up the treble, I don't up the bass, I don't down anything, I don't play around with anything, I just keep everything flat, I'm boring like that, I just like it just flat. There are reasons why people may want to use graphical equalizers and bits and pieces like that, but I was just taught a long time ago that you have the minimal things in between, the input signal and the output, which would basically just be the amplifier, maybe a pre-amplifier, and yeah, that's how I listen to my music, and that's how I judge everything as well when I'm listening. Nothing turned up, nothing turned down. Okay, well, I hope you enjoyed the video, and I'll catch you in the next one, guys. Take it easy, bye-bye.