Separation of amp/pre-amp? - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State
Home Forums Rules Articles diyAudio Store Gallery Wiki Blogs Register Donations FAQ Calendar Search Today's Posts Mark Forums Read

Solid State Talk all about solid state amplification.

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
Thread Tools Search this Thread
Old 27th September 2012, 08:03 PM   #1
Momato is offline Momato  Denmark
diyAudio Member
Join Date: Sep 2012
Default Separation of amp/pre-amp?

Hi all, first post here, hope someone who knows electronics more than I can help. I have a Teac Reference A-H500i integrated amp that I would like to use as a per-amp instead. The service manual indicates to me that the per-part is quite separate from the power-amp, so it should be "easy"?

However, I do not h
Know exactly what to tap into. Could anyone have a look at the service manual and give some advice? I guess it would be best to uncouple the power-amp all together.

Manual is at link, under preview picture is a download (appears after some seconds)

Best regards, Morten

Link removed due to concerns over copyright and pirated material.

Last edited by Mooly; 28th September 2012 at 12:40 PM. Reason: Link to Elektrotanya removed
  Reply With Quote
Old 27th September 2012, 08:21 PM   #2
maylar is offline maylar  United States
diyAudio Member
Join Date: Jun 2003
Location: Connecticut
It's hard to tell from the schematic, but does the amp have tape outputs?
  Reply With Quote
Old 27th September 2012, 08:31 PM   #3
Momato is offline Momato  Denmark
diyAudio Member
Join Date: Sep 2012
Yes, but they are not volume controlled?

Here is a pic of the internals, think pre-to-power is the blue wires ending in a White connector on each power-amp board.

Click the image to open in full size.
  Reply With Quote
Old 28th September 2012, 12:45 AM   #4
AJT is offline AJT  Philippines
diyAudio Moderator
AJT's Avatar
Join Date: May 2003
Location: Palatiw, Pasig City
you can normally get preamp output at the top of the main volume control.....
the best advertisement for a good audio design is the number of diy'ers wanting to build it after all the years....never the say so of so called gurus....
  Reply With Quote
Old 29th September 2012, 06:43 PM   #5
diyAudio Member
Join Date: Dec 2010
Location: wigan
I dont think it is the blue wire !! It is more likley to be the grey cables with the black sleeving on the ends . The grey wires pass just next to the blue ones
  Reply With Quote
Old 29th September 2012, 07:07 PM   #6
diyAudio Member
Join Date: Oct 2006
Some power amps would want the signal after it comes out of the volume control - passive pre, these amps could have a problem if the signal is amplified first. You need to cosnider what you're going to first.
  Reply With Quote
Old 30th September 2012, 04:01 AM   #7
diyAudio Member
Join Date: Apr 2010
Location: Coffs Harbour
I can't speak for forum management, but no organisation needs to have it's reputation sullied by openly supporting illegal activity by its members.
That's the issue. Unfortunately, it's also a cultural issue, most strongly supported in the US, less so in Europe and almost ignored in Asian countries.

There are adequate provisions for accessing material via links to other sites, as in the case of the constant references made to ESP site material and free schematic download services - these are often superior schematic archives because the site and contributors are set up for the purpose. If the interest is really there, a download may prove more useful in any case.
  Reply With Quote
Old 30th September 2012, 08:30 AM   #8
diyAudio Member
Nico Ras's Avatar
Join Date: Nov 2005
Location: East Coast of South Africa
Originally Posted by madtecchy View Post
I dont think it is the blue wire !! It is more likley to be the grey cables with the black sleeving on the ends . The grey wires pass just next to the blue ones
I think Madtecchy is right. It would most probably be a screened cable like the one he says.
Kindest regards
  Reply With Quote
Old 30th September 2012, 12:48 PM   #9
Mooly is offline Mooly  United Kingdom
diyAudio Moderator
Mooly's Avatar
Join Date: Sep 2007

Posts on moderation and copyright removed.

Guys... copyright is a fine line sometimes but there are valid concerns over some sites.
Installing and using LTspice IV. From beginner to advanced.
  Reply With Quote
Old 30th September 2012, 02:20 PM   #10
tvrgeek is offline tvrgeek  United States
diyAudio Member
Join Date: Dec 2009
Location: Md
There are many very good, some very very good preamps on the auction sites for darn near nothing. Only a few of us want a non-remote stereo preamp. I picked up a Nac CA-5 for almost nothing. One of the best preamps ever built. Easier than hacking up an existing integrated amp.

Tape out is usually before the volume control.

On schematics, I fully respect a companies intellectual property. I do wish a few more would have an enlightened view that if it is a technology based product, like our amps, than after 10 or so years post production it is no longer any real use to protect the company or their service affiliates, so it is good PR to release said schematics for the enthusiast market. Patents may still apply and should be respected. Besides, the real secret to many of the top products is actually the physical execution, not just the schematic.
  Reply With Quote


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
Phono pre-amp, TT PSU, mic pre-amp build log ptheskil Analogue Source 0 7th May 2012 03:55 PM
What Degrades Channel Separation in a Stereo Power Amp? Ron AKA Solid State 12 6th September 2011 05:31 AM
Separation of preamp and power amp off1 Tubes / Valves 9 9th November 2010 07:30 AM
WIll an X-PSU v1 power an SI T-amp &/or TC754 pre-amp? gnostic19 Class D 7 3rd August 2007 02:26 AM
How important is channel separation in amp design? Commited Class D 9 9th February 2005 11:14 AM

New To Site? Need Help?

All times are GMT. The time now is 01:22 PM.

vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2017 DragonByte Technologies Ltd.
Copyright 1999-2017 diyAudio

Content Relevant URLs by vBSEO 3.3.2