Go Back   Home > Forums > Source & Line > Analog Line Level

Analog Line Level Preamplifiers , Passive Pre-amps, Crossovers, 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 15th January 2011, 03:45 PM   #1
diyAudio Member
 
Join Date: Aug 2002
Location: UK
Default Long cable query

Hi All
Have run a ten metre cable from my Denon 3808 to the sub.Also a straight stereo pre out to a power amp again through ten metres of cable.
I wish to put a switched attenuator in the sub line.Would the switched attenuator be better at the output of the Denon or next to the amp?
I would rather it next to the Denon.If that is the case would i need to add a line driver after the switched attenuator.Sorry but old boy newbie.
Thanks for any help.Amp input impedance is 33K
John
  Reply With Quote
Old 15th January 2011, 03:51 PM   #2
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Better near the sub, but I don't think you will notice with a sub if you do put it at the amp end.

Why do you need the attenuator? Does the sub not have a level control?
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 15th January 2011, 03:59 PM   #3
diyAudio Member
 
Join Date: Aug 2002
Location: UK
Thanks Richie00boy
It did have.Its a Paradigm PS1000 I think.But the internal amp was so naff I bypassed it.
Just drilled two holes for 2 banana plug sockets and swapped cables from amp output to Banana spades.
Miles better on a bridged Rotel RB981.
Maybe I should just try and see if any difference.
Smiffy
  Reply With Quote
Old 15th January 2011, 04:33 PM   #4
Did it Himself
diyAudio Member
 
richie00boy's Avatar
 
Join Date: Nov 2003
Location: Gloucestershire, England, UK
Can't you just set the volume on the Rotel to the appropriate level?
__________________
www.readresearch.co.uk my website for UK diy audio people - designs, PCBs, kits and more.
  Reply With Quote
Old 15th January 2011, 05:03 PM   #5
LAJ is offline LAJ  United States
diyAudio Member
 
Join Date: Mar 2008
Location: Atlanta Ga. USA
Default Why don't you...

just fix the level control on the sub? Contact the manufacturer and tell them how much you like their equipment and they just might send you the part for free.
  Reply With Quote
Old 15th January 2011, 05:20 PM   #6
DF96 is offline DF96  England
diyAudio Member
 
Join Date: May 2007
If you want to attenuate the signal from a long cable then generally best to put the attenuator at the end of the cable, not the beginning. Two reasons for this:
- attenuate any noise pickup as well as signal
- avoid driving the cable with a higher impedance than the driving end output

Under normal domestic conditions the difference might not be very big, so do whichever is more convenient.
  Reply With Quote
Old 16th January 2011, 07:21 AM   #7
diyAudio Member
 
Join Date: Aug 2002
Location: UK
Cheers all for the help.The Rotel is a power amp only.The volume control on the sub was fine its just that it sounded very dull.
Ss if it was only playing one note.
So I disconnected the internal sub amp and am driving it with the Rotel now.
Sounds a lot better and integrates with the rest of the system better
I will see if I can get it as close to the rotel as possible

Smiffy
  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
Buffer for long cable capacitance trv Construction Tips 10 28th May 2010 07:37 PM


New To Site? Need Help?

All times are GMT. The time now is 05:11 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