how to harman/kardon hd 970 sounds better - diyAudio
Go Back   Home > Forums > Source & Line > Digital Source

Digital Source Digital Players and Recorders: CD , SACD , Tape, Memory Card, 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 5th August 2011, 08:52 PM   #1
diyAudio Member
 
Join Date: Jan 2011
Location: belgrade
Default how to harman/kardon hd 970 sounds better

Help please.What can i do to my player to sound stronger?If i make some changes in i/v conversion(for example change resistor in negative feedback of op amps op 275) or some other change in output differential stage, will that make some difference(or something else )thanks
  Reply With Quote
Old 5th August 2011, 09:49 PM   #2
diyAudio Member
 
HornTube's Avatar
 
Join Date: Nov 2009
Put some Sowjet tubes (6N6P on high current - not in SRPP mode) after the i/v section. Get rid of the diamond buffer output stage and all the 1000 parts. Use K75-16(24) caps for the tube signal section and there you go.
  Reply With Quote
Old 5th August 2011, 11:30 PM   #3
diyAudio Member
 
Join Date: Jan 2008
Location: Virginia
Quote:
Originally Posted by vujnovic zex View Post
What can i do to my player to sound stronger?
Use a "stronger" power amplifier than the current one?
  Reply With Quote
Old 5th August 2011, 11:48 PM   #4
diyAudio Member
 
HornTube's Avatar
 
Join Date: Nov 2009
Quote:
Originally Posted by SoNic_real_one View Post
Use a "stronger" power amplifier than the current one?
I think he means bolder/dynamics/body/drive/energy...
  Reply With Quote
Old 6th August 2011, 12:14 AM   #5
diyAudio Member
 
Join Date: Jan 2008
Location: Virginia
First of all - look for the latest firmware update - V4.4. There are 2 different versions: one for the ones with the loader mechanism DSL710/720A and another for the loader mechanism DV345/HD65.
Second - the output stage is one of the best in this class of players. You can try different OpAmps instead of the original I/V (OP275), but that is already a very good OpAmp.
LM4562, AD8652 or even OPA1642.

PS: Using tubes as I/V stage will just cripple it.
  Reply With Quote
Old 6th August 2011, 09:53 AM   #6
diyAudio Member
 
Join Date: Jan 2011
Location: belgrade
thanks a lot
  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
Harmon Kardon HD-970 problem pkonstantinidis Digital Source 21 9th October 2012 08:25 PM
Schematic for Harman Kardon HD 990 cdp Chilli6565 Digital Source 1 15th September 2010 12:14 AM
Harmon Kardon HD-970 modded, a world beater? Nigel Page Digital Source 125 16th May 2010 08:06 PM
Harman Kardon HD 970 details Henckel Digital Source 10 21st July 2007 07:03 PM


New To Site? Need Help?

All times are GMT. The time now is 11:45 AM.


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