Japan's ultimate RIAA Head Amp - Yamaha HX-10000: who have heard ?

Status
Not open for further replies.
Jump to Latest
tiefbassuebertr

tiefbassuebertr

Member
Joined 2005
tiefbassuebertragung.de
#1

Attachments

  • Yamaha HX-10000.jpg
    Yamaha HX-10000.jpg
    184.1 KB · Views: 908
  • Yamaha HX-10000 rear.jpg
    Yamaha HX-10000 rear.jpg
    51.7 KB · Views: 875
Last edited:
#3
MC SNR Figures

The manufacturer either has access to lower noise transistors than I have seen or has screened devices to get those with the best noise figures. I can believe that by going 2 sigma out on the distribution curve that it's possible to get an En that is 50% that of typical. If they used 2SJ74/2SK170 devices and paralleled them they might get En down below 0.1 nV/sqrt(Hz), which is approximately what they would need to get ~95 dB SNR for 500 uV. BTW, I am assuming the 500 uV is applied at 1.0 KHz. Does anyone know for sure?
 
#5
Transistor Type in Yahama MC Amp

Uli,

Thanks for the additional information. Do you know what the parameteic differences are between those transistors and the 2SJ74/2SK170? Also, it would be interesting to get SPICE models for the devices Yahama is using.
 
#6
Steerpike said:
Never seen that before. The MC noise figure is quite impressive.
Click to expand...

analog_guy said:
The manufacturer either has access to lower noise transistors than I have seen or has screened devices to get those with the best noise figures. I can believe that by going 2 sigma out on the distribution curve that it's possible to get an En that is 50% that of typical. If they used 2SJ74/2SK170 devices and paralleled them they might get En down below 0.1 nV/sqrt(Hz), which is approximately what they would need to get ~95 dB SNR for 500 uV. BTW, I am assuming the 500 uV is applied at 1.0 KHz. Does anyone know for sure?
Click to expand...

Maybe just the A weighed measurement filtering effect? ''S/N比（IHF-A補正）''.
 
Status
Not open for further replies.
Top Bottom