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Yamaha R-N402D with JBL Stage A180 hiss/impendance

ZolaIII

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Nope. The R-N402D has identical power amp and power supply to the A-S201 and possibly the R-S201 and R-S202D.
It's rather weak, their smallest one.

The R-N803 shares power supply and power amp with R-S700 and A-S700/701/801.
I am quite sure you are wrong, it's higher rated Sunken pairs on R-N402D (100 - 140 W @ 8 Ohm's).
 

TheBatsEar

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I am quite sure you are wrong, it's higher rated Sunken pairs on R-N402D (100 - 140 W @ 8 Ohm's).
This is what a R-N803D looks like:
dz0xMjAwJmg9MTAyNg==_src_52147-amplituner-stereo-yamaha-r-n803d-audiocompl-fot4.jpg

The A-S701:
index.php


This is what a R-N402D looks like:
yamaha-musiccast-r-n402d-amplifier-streamer-wifi-airplay-dlna-bluetooth-2x115w-4-ohm-24bit-192...jpg

This is the R-S202D:
index.php
 

ZolaIII

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@TheBatsEar I still won't call it weak, they have two weaker Sunken stages on newer ones like R-N602.
 

TheBatsEar

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Do you mean Sanken transistors?

Didn't have the R-N602 yet, didn't feel like looking up schematics.

BTW, here are some collected pics of what amp has which transistors:
 
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