 Hello everybody and welcome back to my channel, first of all apologies for the lower production on this, I can't use my microphone at the moment because I'm using the input on my sound card for what I'm doing today to show you and I also can't use a screen recorder because I don't have one for Windows just yet, I'm just using this in Windows for now because I just wanted to show you something that I found to be quite interesting. Now this is the output, if I can show you my zoom in over here, I can move this across there and as you can see that's minus 3 dBFS and the cursor sets at 3kHz and look at the total harmonic distortion at 0.0077 and with the noise we can see that it's 0.0099 and that's using this quad 405, now that's different results than what we got before, I'm using the same just 32 volts in both sides, so 32, 0, 32, we're on an eight-time load and that's the results that we're getting. So as you can see there's the fundamental here and I've changed it already, it's down to minus 3 dBFS and all the harmonics that come off that, it's fair enough they're all going lower and lower and at 3 we've got 89.61 dBFS, so that shows it to be a lot better especially when you consider the total harmonic distortion 0.0077 or total harmonic distortion plus the noise is 0.0099, now we can also look at the frequency response here and we put that to 6, update that, there we go, right, now if we do this frequency response across there we get to see that even though the graphs moved itself, we get to see our frequency response, so I'm going to just stop that and yeah, so here we are at 20 and at 30 it's sort of dropped down a bit, now this is something that, you know I've popped my head apart on this so many times now, I mean we're minus 0.22 down here, now I know that you may not be able to see this as well and I will get this set up properly, I just wanted to show you this because it's quite intriguing as to, although this looks pretty much the same as in the audio analyzer suite, this now has the ability to see in more depth than what I could before and so, ah, you know it's intriguing because I said before that I listened to the Quad 405 and it sounded quite nice and it does sound quite nice, it's better than some of the others, the MX50 and stuff like that because on that I noticed in the middle, in those middle ranges there was something missing and you don't get that but it's quite, and this is using the TO3 package, this Quad 405, so I'm not even using the newer version of the newer transistors, I'm using this older version and these are the results back from it and I'm quite surprised, yeah there's a little bit of a climb here but nothing, if we look that says 0.04 dB against the signal going in and this down here at 30 hertz is 0.23, so it's not even half a dB or anything like that and that could be why, like I said before that there are quite a lot of people out there that build these up and they put them in cases and they enjoy listening to them, now some people say well you don't get those lower notes but look, alright well first of all you've got to have a, you've got to have a source that's going to provide that to you, right, so for me just as my little look around so you can find it, I've got like a little music player and it has some pretty good specs on it, can't find that moment, it's probably in the bedroom because I've set a little system up in the bedroom and that will give me you know a good low noise and it'll give me a good sound which will take me down to those frequencies but not everybody is going to have that ability to start off with, alright and then you gotta have an amplifier that's going to reproduce it as flat as possible to the same as what you've got, so let's say your source input was this and then the amplifier was this then you can hope then that your speakers could then represent this, meaning that your speakers will only drop off, let's say this is, I know the little speakers I have up on the shelf here at the top at the moment, a little QQ sticks, 70 Hertz is where that's it, they don't really have any more response, any lower than that, so here at 70 Hertz that would be, so those speakers there anything after this it could just drop off down here and it's not going to really make any difference to what I get to listen to on those speakers because even if I could put in you know completely flat and the amplifier reproduced completely flat, my speakers are dropping off at 70 Hertz, so that's that, that's all she wrote, you're not going to get any more, you don't matter how flat this goes all the way to zero, you're not going to get any of these frequencies reproduced for your speakers because your speakers aren't capable of doing it, the ones in my bedroom go to 45, 46 Hertz sorry around about here, so we're good for this amplifier too because anything after that those speakers drop off, the speakers I have next to me here go to 35 Hertz, it's where are we here, we're 33, so 35 Hertz and we're good to there, anything after that we're dropping off, but I don't have speakers that reproduce anything lower than that, so this it wouldn't affect me, you understand this and what I'm saying, and this little tiny rise at 20 kilo Hertz is not really, you know 0.02 it's saying down here, I'm just going to zoom into that for you so you can see what the cursor is, 0.02, that's at 18259 kilo Hertz, 0.02, so hmm, all I can say is what I said before is that when I first listened to this and paired it up listen to it, I found nothing wrong with it, I thought it sounded fine and I got a funny feeling that you would probably find the same thing, so I'm saying this now for this quad 405, yeah it does sound good and I'm gonna do a more, I'm gonna redo more, but I'm gonna try and get a bit of a better setup, I'm sorry this is like this just for this minute in time, but I just wanted to get something out there because I've tried so many things with this, first of all it was a case of getting this thing calibrated and I went through a whole bunch of cables and I'm gonna do a video on that just to show you that the importance and sometimes the, what can the word be, I've got different types of cables, one's brand new that came with the sound card device that I'm using at the moment, which is the Creative Sound Blaster AE9, so if you wanna look that up it's got some pretty good specs and to be honest with you see these old sort of cables I've got here, these are the best ones, this is the best cable I have because when I took readings for homage and I also did the calibrations on this I got the best results for the calibration and everything else with these older wires, now I'm gonna have to do some more readings to figure out why that is and I expected there's gonna be capacitance that comes into it and bits and pieces like this, but surprise surprise the brand new ones that came with the Creative Sound Blaster didn't do as well as what these old wires did, so ones that look like pretty chunky, pretty wide chunky cables, they were absolutely terrible and the ones in between didn't do so either, I was really surprised because what I'm using here the best I can use at this minute in time until I find other cables that will give me hopefully a different result because it seems like different cables give you different results and these ones are giving the best result because they're working the best and that's why I'm using them on this setup like this, so anyway that's just for the thought I'm gonna reiterate again that this is a pretty nice sounding amplifier and if you were gonna go and buy it to set it up for yourself it's pretty simple to set up, as you can see from the frequency response it doesn't do bad at all, not bad at all and like I've explained you know from here for my speakers myself personally on this line 70 Hertz is where mine drop off while this exceeds the abilities of my speakers and it also exceeds the abilities of my 35 Hertz which is the big floor standards the monitor audio monitor 300s that I have in the lounge here and the ones that I have in the bedroom 46 Hertz this 45.41 also exceeds those so this amplifier is great for all those speakers as long as what you feed into it can provide just as well on the frequency response so anyway videos too long cheers watching guys and I'm gonna bring you a better production quality one on the next one bye for now