Another CFA from MJ Magazine

[vzaichenko]

Bimo, c'mon

546 and 550 are the same series. 546 is a bit higher voltage and a very bit higher noise - typical value is 2db against 1.4db for 550.

 

[bimo]

Bimo, c'mon

546 and 550 are the same series. 546 is a bit higher voltage and a very bit higher noise - typical value is 2db against 1.4db for 550.

The PCB layout is more important than the difference of BC546 and BC550 noise value.

 

[vzaichenko]

Yep

 

[thimios]

The PCB layout is more important than the difference of BC546 and BC550 noise value.

There are other choices ,such as a970,c2240 low noise.
Btw Bonsai opinion is that isn't necessary low noise devices in this stage.