Audiolab 8000a Speaker Protection - diyAudio
Go Back   Home > Forums > Amplifiers > Solid State

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
Reply
 
Thread Tools Search this Thread
Old 15th May 2006, 08:47 AM   #1
diyAudio Member
 
Join Date: May 2006
Default Audiolab 8000a Speaker Protection

Does anyone know if a total electronics novice could adjust/disable the 8000a's speaker protection system?
Years ago Audiolab told me it could be adjusted at the factory so it is possible.
Thanks for any help.
  Reply With Quote
Old 15th May 2006, 08:52 AM   #2
diyAudio Moderator
 
pinkmouse's Avatar
 
Join Date: Apr 2002
Location: Chatham, England
What are you trying to achieve?
__________________
Rick: Oh Cliff / Sometimes it must be difficult not to feel as if / You really are a cliff / when fascists keep trying to push you over it! / Are they the lemmings / Or are you, Cliff? / Or are you Cliff?
  Reply With Quote
Old 15th May 2006, 09:18 AM   #3
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
The VI limiting circuit is disable-able, but I have to ask why you want to do it. If you feel it's encroaching on your listening it's probably time to buy a more powerful amp. The protection is there for a reason.
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 15th May 2006, 09:25 AM   #4
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

Yes a relative novice can adjust the trip limits in an Audiolab 8000A.

The procedure is outlined in the service manual but it is fiddly, I can't
remember the exact details, I think a set of resistor values is needed.

The trip limits should only be adjusted because the load is low impedance.

/sreten.
  Reply With Quote
Old 15th May 2006, 11:17 AM   #5
mikeks is offline mikeks  United Kingdom
Account Disabled
 
Join Date: Jun 2004
Location: Animal farm
Quote:
Originally posted by sreten
Hi,

Yes a relative novice can adjust the trip limits in an Audiolab 8000A.

The procedure is outlined in the service manual but it is fiddly, I can't
remember the exact details, I think a set of resistor values is needed.

The trip limits should only be adjusted because the load is low impedance.

/sreten.
Hi Sreten...you wouldn't happen to have a copy of that service manual, would you?
  Reply With Quote
Old 15th May 2006, 12:21 PM   #6
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

I do, somewhere at home, I'll have a look for it tonight.

/sreten.
  Reply With Quote
Old 15th May 2006, 01:15 PM   #7
anatech is offline anatech  Canada
diyAudio Moderator
 
anatech's Avatar
 
Join Date: Jun 2004
Location: Georgetown, On
Hi Sreten,
Quote:
you wouldn't happen to have a copy of that service manual, would you?
I'd be interested also if it's not too much trouble. I've repaired a few with a schematic only.

I'm still uneasy about messing with the protection circuit. You never want to disable it completely. That is asking for trouble.

-Chris
  Reply With Quote
Old 16th May 2006, 02:58 PM   #8
diyAudio Member
 
Join Date: May 2006
I't s because it doesn't go as loud as it should before it cuts the power.
When I spoke to Audiolab several years ago and described the other equipment and the listening environment, they said straight away that it must be set too low, but I couldn't afford to have them change it.
If anyone has a guide to doing this I'd appreciate a copy.
Thanks.
  Reply With Quote
Old 16th May 2006, 03:25 PM   #9
sreten is offline sreten  United Kingdom
diyAudio Member
 
Join Date: Nov 2003
Location: Brighton UK
Hi,

please tell me the serial number of the 8000A.
For the correct models the procedure is straightforward,
I was confusing it with resetting the bias.

The procedure prevents the mute relay operating on
high level bass transients into low impedance loads.

/sreten.
  Reply With Quote
Old 16th May 2006, 04:16 PM   #10
diyAudio Member
 
Join Date: May 2006
Thanks for your interest 'Sreten'

S/N: 207B76250

Jerry
  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
Audiolab 8000A Fault rjweatherill Solid State 38 22nd February 2014 03:52 PM
Audiolab 8000a dantzig65 Solid State 9 6th June 2011 02:48 PM
Help! Audiolab 8000A Matthewong Solid State 9 15th October 2007 06:09 PM
audiolab 8000a davephot Solid State 35 26th November 2006 10:25 PM
Audiolab 8000A - old version dudu Solid State 1 29th April 2006 06:34 AM


New To Site? Need Help?

All times are GMT. The time now is 04:55 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