[oporto]

Hi everyone, long time ago I had decided to build the M3, and I did, but when I finished it I realized something had gone wrong, there was sound coming out but very very quiet, I could almost not hear anything.
 
Me and a friend who is an electronics and electric technician tested everything and it all seemed to be fine so we concluded that I overheated one/some parts and that's why there was sound but not loud.
 
I decided to rebuild it but because I moved houses and I was then studying full time and working on weekends I never made the time for it.
 
Anyway, long intro, this is my old thread http://www.head-fi.org/t/569141/help-building-m3 Cant believe how long its been!
 
But I want to build it again now, the only question atm is the following:
 
The AD8610AR http://au.mouser.com/Search/ProductDetail.aspx?R=AD8610ARvirtualkey58430000virtualkey584-AD8610AR
is about to be replaced by 
AD8610ARZ  http://au.mouser.com/Search/ProductDetail.aspx?R=AD8610ARZvirtualkey58430000virtualkey584-AD8610ARZ
 
which one should I get? or it wont make a difference?
 
luckily everything from my old order can still be reordered so I will simple reorder all the components I need and start building as soon as they arrive.
 
 
Thanks for your help!!
 
 
If you are from Sydney I plan on finishing it before the Sydney Can Con 5.0 so I can take it : D

 

[MisterX]

Won't make a difference.
 
Does your build have bass boost?
If not you need to install jumpers across the Sbbr and Sbbl pads or it's not going to make any sound.

 

[oporto]

Thanks MisterX! Will order tonight : D
I plan on having bass boost, will definitely need it for my Q701 : )

 

[oporto]

 
Just a little update : P
 
Unfortunately I have to reuse 2N5486 and 2N5484 transistors from my old build as I dont want to spend 30+ on shipping from amb just for 8 transistors, and because they are discontinued I couldnt order from mouser nor element14.  They should still work though, right?  D:   Maybe you guys from AMB can send them on an envelope? If so I will probably buy them if they can get to me in within 1 week. Its quite difficult to get them out from the old build.
 
Not sure what else to say, just that I simply can't wait to finish it.
 
 
@MisterX

 

[oporto]

Update: (copy from amb forum post)
 
 
I just finished building the M³ today, I will post pictures pictures tomorrow but dont have a proper case yet, I am just using a hand made wooden one until I decide on a decent case.
 
The problems:
 
1. There is very high distortion at moderate to high volume (higher volume = more distortion) even when the bass boost is at minimum, it also gets extremely distorted if I increase the bass. Any ideas how can I fix this?
2. There is still a bass boost even when the bass knob is at minimum, is this normal? How can I set it so that when the knob is at minimum there is zero bass boost? Is this the cause of problem 1 ?
 
-I built it using the same parts recommended on the site, the bass is :  R3 = 1 KΩ,   R4 = 10 KΩ,   Rbb = 50 KΩ,   Cbb =  0.22 µF 
-I am using the Alps RK27112A for both volume and bass.
-I am using AD8610AR
-Powered by the σ11 using a 25VA, 2 X 12V    
 
Tested using the AKGs Q701 and ASG 2.5
 
Not sure what other specs I need to share, I went through the initial setup and everything is tuned as accurate as possible, I left the BIAS trimpots at 80mV.
 
 
Thanks in advanced, all help is greatly appreciated.

 

[oporto]

Well, I finally finished it, it seems to be working fine, I am already enjoying it.  But its still too soon for a review.  The problem I had before was solved by simply resoldering the potentiometers.
 
Here some pictures.  https://www.flickr.com/gp/129074818@N05/sek771 
 
For people who have tried it, do you find the amp a bit slow? That was one of the first things I noticed, but like I said, its too soon for a review. And I am yet to try it with the y2 Full++.
 
 
Next build will be the M3 Mini !
 
Thanks AMB!
 
PS: The cases are temporary!