Japan's ultimate RIAA Head Amp - Yamaha HX-10000: who have heard ? - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 24th February 2010, 02:08 AM   #1
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Default Japan's ultimate RIAA Head Amp - Yamaha HX-10000: who have heard ?

Who have heard this Yamaha Phono Preamp?
http://www.thevintageknob.org/YAMAHA...0/HX10000.html
YAMAHA ƒtƒHƒmƒCƒRƒ‰ƒCƒUHX-10000‚Žd—l ƒ„ƒ}ƒn
http://www.audiostereo.pl/Yamaha_czy...aki_33014.html
http://3rd.geocities.jp/yosikotue/newpage61.html
http://home.j08.itscom.net/studio-k/.../myaudio4.html (scoll down)
Attached Images
File Type: jpg Yamaha HX-10000.jpg (184.1 KB, 598 views)
File Type: jpg Yamaha HX-10000 rear.jpg (51.7 KB, 567 views)

Last edited by tiefbassuebertr; 24th February 2010 at 02:22 AM.
  Reply With Quote
Old 24th February 2010, 11:10 AM   #2
diyAudio Member
 
Steerpike's Avatar
 
Join Date: Jan 2006
Location: Johannesburg, South Africa
Never seen that before. The MC noise figure is quite impressive.
__________________
Steerpike's Toybox
  Reply With Quote
Old 6th March 2010, 08:11 AM   #3
diyAudio Member
 
Join Date: Apr 2007
Default 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?
__________________
JCM
  Reply With Quote
Old 6th March 2010, 08:29 AM   #4
uli is offline uli  Austria
diyAudio Member
 
Join Date: Dec 2002
Location: Vienna, Austria
Quote:
Originally Posted by analog_guy View Post
If they used 2SJ74/2SK170 devices and paralleled them they might get En down below 0.1 nV/sqrt(Hz)
I assume not J74/K170 but rather J72/K147 and the described duals seem to be (at least from the photo) J73/K146

cheers Uli

__________________

'Jazz is not dead, it just smells funny' F.Zappa
  Reply With Quote
Old 7th March 2010, 11:40 PM   #5
diyAudio Member
 
Join Date: Apr 2007
Default 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.
__________________
JCM
  Reply With Quote
Old 8th March 2010, 05:18 PM   #6
Salas is online now Salas  Greece
diyAudio Chief Moderator
 
Salas's Avatar
 
Join Date: Oct 2002
Location: Athens-Greece
Quote:
Originally Posted by Steerpike View Post
Never seen that before. The MC noise figure is quite impressive.
Quote:
Originally Posted by analog_guy View Post
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?
Maybe just the A weighed measurement filtering effect? ''S/N比(IHF-A補正)''.
  Reply With Quote
Old 19th April 2011, 09:44 AM   #7
diyAudio Member
 
tiefbassuebertr's Avatar
 
Join Date: Jul 2005
Location: D-55629 Schwarzerden
Default The same Question again: Who have heard Yamaha HX-10000 ??

Is this model really extremly rare ?
  Reply With Quote
Old 28th April 2011, 07:07 PM   #8
leejr is offline leejr  United States
diyAudio Member
 
Join Date: Apr 2011
Location: Yorktown Virginia
I have never seen one in the States. In fact I have never seen an advertisement for one of these. I am going to do some research.
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Chip Amp based on the topologies from Yamaha MX-10000 and Quad 405 tiefbassuebertr Chip Amps 2 28th April 2011 02:32 PM
Ultimate Integrated Amp - Logical Wings Miracle Drive "USO800-Pro", who have heard ? tiefbassuebertr Solid State 1 24th November 2010 06:51 PM
Yamaha Nsx 10000 stewartwen Multi-Way 1 18th December 2006 01:12 PM
Ultimate Tube head phone amp. tube-lover Tubes / Valves 14 13th July 2005 05:25 PM
Ever heard of an amp bypassing remote from the head unit? MrBig Car Audio 5 8th June 2004 01:10 PM


New To Site? Need Help?

All times are GMT. The time now is 09:07 PM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2