Balanced line level to drive RCA amp in bridged mode - 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 5th February 2012, 11:11 AM   #1
diyAudio Member
 
Join Date: Jul 2010
Default Balanced line level to drive RCA amp in bridged mode

Hi ,

Can i use Balanced output from my preamplifier to get splitted RCA signal from hot/cold and neutral pins to drive L+R channel of an amplifier and take output from hot pins of amplifier output thus making a bridge and hence converting a stereo amplifier into monoural bridged amplifier ?

Just wanted to know before making any go ahead....would simply cut the female XLR connector and attatch 2 RCAs on each output for my twin Yamaha B-5 amplifier.....want to have 2 monoblocks.......700W/channel into 8 ohs, and 60 W Class A per amp in Yamaha B-4 amp?

Please suggest
  Reply With Quote
Old 5th February 2012, 11:50 AM   #2
wahab is offline wahab  Algeria
diyAudio Member
 
Join Date: Nov 2009
Location: algeria/france
Your balanced XLR has a GROUND and two outputs wich are in opposed
phase , so you just have to use Ground/+ ouput for a RCA connector
and Ground/-output for the second one and plug onto right and left channel.

By convention the right channel hot pin output will be used as +
and the left channel HOT PIN output as -/VIRTUAL GROUND to connect the speaker.
  Reply With Quote
Old 5th February 2012, 11:50 AM   #3
AndrewT is online now AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
No.
Convert the amplifier to accept the balanced input and use the two signals from the input circuit to feed the two channels of the bridged amplifier.
__________________
regards Andrew T.
  Reply With Quote
Old 5th February 2012, 11:53 AM   #4
AndrewT is online now AndrewT  Scotland
diyAudio Member
 
Join Date: Jul 2004
Location: Scottish Borders
Wahab,
PIN1 of the output is not a signal reference voltage. PIN1 is connected directly to chassis and the two signal wires PIN2 & PIN3 do not necessarily reference to the chassis.
__________________
regards Andrew T.
  Reply With Quote
Old 5th February 2012, 11:54 AM   #5
Zen Mod is offline Zen Mod  Serbia
diyAudio Member
 
Zen Mod's Avatar
 
Join Date: Jan 2003
Location: ancient Batsch , behind Iron Curtain
Quote:
Originally Posted by muddasirwaheedmalik View Post
Hi ,

Can i use Balanced output from my preamplifier ....
yes , you can , if output of preamp is truly symmetrical
__________________
my Papa is smarter than your Nelson !
clean thread; Cook Book;PSM LS Cook Book;Baby DiyA ;Mighty ZM's Bloggg;Papatreasure;Papa... by Mighty ZM
  Reply With Quote
Old 5th February 2012, 11:56 AM   #6
diyAudio Member
 
Join Date: Jul 2010
i intend to use this Behringer DI box for unbalanced to balanced convertor:with two unbalanced inputs i can have upto 8 outputs, high input impedance of 1Mohm, 600 ohm output impedance, plus it has a ground lift switch.

But what about the conversion Andrew T, can i do it this way , i cannot understand what is being said here. my apologies. whats the difference in splitting the Balanced output from DI800 with ground lifted run each channel with hot/cold pin 2/3 and ground pin and take outputs from both hot terminals of speaker, in this way i would not have to open and modify amplifier ?

Is it doable?
  Reply With Quote
Old 5th February 2012, 11:57 AM   #7
wahab is offline wahab  Algeria
diyAudio Member
 
Join Date: Nov 2009
Location: algeria/france
Quote:
Originally Posted by AndrewT View Post
Wahab,
PIN1 of the output is not a signal reference voltage. PIN1 is connected directly to chassis and the two signal wires PIN2 & PIN3 do not necessarily reference to the chassis.
As pointed by Zenmod , if it s not a mock XLR , it s possible...

The signals are referenced to ground not to the chassis if it s
a safe XLR.

Last edited by wahab; 5th February 2012 at 12:00 PM.
  Reply With Quote
Old 5th February 2012, 11:57 AM   #8
diyAudio Member
 
Join Date: Jul 2010
would the output be completely balanced/symmetrical , i think so with this
BEHRINGER: DI800
  Reply With Quote
Old 5th February 2012, 12:00 PM   #9
diyAudio Member
 
Join Date: Jul 2010
BTW i also have KRELL KRC_HR preamplifer with a pair of XLR outputs and i assume they should be symmetrical as i am driving KRELL FPB 600 amplifier with XLR cables and ground pin removed for fully balanced operation
  Reply With Quote
Old 5th February 2012, 02:33 PM   #10
diyAudio Member
 
Speedskater's Avatar
 
Join Date: Sep 2002
Location: Lakewood, Ohio
Quote:
Originally Posted by AndrewT View Post
PIN1 of the output is not a signal reference voltage. PIN1 is connected directly to chassis and the two signal wires PIN2 & PIN3 do not necessarily reference to the chassis.
This is exactly CORRECT !
In as much as Pin #1 of an XLR connect is NOT part of the audio circuit, it should not be used as a reference or as part of the audio circuit.
__________________
Kevin
  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
line level unbalanced to balanced converter steevo Analog Line Level 17 16th February 2014 03:09 PM
balanced line level baffle step circuit Harolda Analog Line Level 2 5th September 2010 06:13 PM
Unbalanced to Balanced Line Level XFMR wrenchone Solid State 8 22nd October 2005 08:06 PM
RCA -> XLR balanced line transmitter eRiCdWoNg Parts 15 29th December 2003 11:44 PM
Line Level, Balanced Voltage Level... dkemppai Solid State 3 10th December 2002 11:04 PM


New To Site? Need Help?

All times are GMT. The time now is 09:38 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