2. amps-preamps
  3. 177022-167303

Threshold Sa3.9e

Hello, is it possible to have the manual of this fantastic amp?
I am particularly worried about the possibility of driving the 3.9e from my Aleph P1.7 preamp in balanced mode, because I have read that the xlr input impedance of the power amp is only 600 ohm while in the P1.7 manual it is recommended to keep the master volume in the position of least attenuation (where it has the highest output impedance!).
I can't find anything on the web........
Thanks,
Stefano

128x128spersanti276
imhififan's avatar
imhififan
2,205 posts
 

@spersanti276 

If you're a diyaudio forum member, you can download the E-Series Operations Manual. Click on the link and go to posts #16.

Threshold Amplifier - Overview and Schematic Collection of all Models

 

spersanti276's avatar
spersanti276 OP
10 posts
 

Thanks!

imhififan's avatar
imhififan
2,205 posts
 

I am particularly worried about the possibility of driving the 3.9e from my Aleph P1.7 preamp in balanced mode, because I have read that the xlr input impedance of the power amp is only 600 ohm while in the P1.7 manual it is recommended to keep the master volume in the position of least attenuation (where it has the highest output impedance!).

Please take a moment read the manual, the Aleph P1.7 should has no problem driving the 3.9e, you also can play with the gain setting for best performance.

https://www.passlabs.com/wp-content/uploads/2020/05/apman.pdf

 

 

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