How do you bridge two bridged amplifier? - Page 3 - 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 2nd October 2003, 01:19 PM   #21
Warp Engineer
On Holiday
 
AudioFreak's Avatar
 
Join Date: Oct 2001
Location: Queensland, Australia
The purpose of my post above was simply to provide the pic. Both amps are fed the same non-inverted signal. BTW, the X1000 uses an extra box which is basicly a bunch of isolation transformers before the inputs to allow such operation. Internally the X1000 has no Earth connection except on the case which is isolated from the circuit. The downside of this whole idea is that if the amps are slightly different in terms of frequency response or in the time domain, the output will get messed up to some extent.
__________________
- Dan
  Reply With Quote
Old 2nd October 2003, 01:40 PM   #22
UrSv is offline UrSv  Sweden
diyAudio Member
 
UrSv's Avatar
 
Join Date: Jan 2002
Location: Sweden
Quote:
Originally posted by AudioFreak
The purpose of my post above was simply to provide the pic. Both amps are fed the same non-inverted signal. BTW, the X1000 uses an extra box which is basicly a bunch of isolation transformers before the inputs to allow such operation. Internally the X1000 has no Earth connection except on the case which is isolated from the circuit. The downside of this whole idea is that if the amps are slightly different in terms of frequency response or in the time domain, the output will get messed up to some extent.
Thanks. As I said I had no idea how the X1000 was set up but they would need to be like that or similar to do it.
__________________
UrSv
Those who say it can't be done should not stop those who are doing it.
  Reply With Quote
Old 2nd October 2003, 04:11 PM   #23
diyAudio Member
 
Join Date: Feb 2001
Location: Mars
Here is a simple representation of two channels bridged.
We know this works.
Attached Images
File Type: jpg bridge.jpg (11.7 KB, 347 views)
  Reply With Quote
Old 2nd October 2003, 04:12 PM   #24
diyAudio Member
 
Join Date: Feb 2001
Location: Mars
Here is two bridged amplifiers in series.

Assume the power sources are individual batteries.

Will this work ?
Attached Images
File Type: jpg bridge-2.jpg (26.4 KB, 348 views)
  Reply With Quote
Old 2nd October 2003, 04:20 PM   #25
diyAudio Member
 
Join Date: Feb 2001
Location: Mars
http://www.carsound.com/ubb/ultimate...c;f=1;t=022066

Zapco Dave II posted;

In order to bridged two amplifiers, said amplifiers have to be single rail (dedicated mono) units. A bridging module is not necessarily needed, but it is CRITICAL that the gain structure for each amplifier is as close to identical as possible! Matching gains cannot be done by simply positioning each gain control in similar positions. There are several steps that need to be taken in order to do this correctly.

My advice would be to contact the manufacturer technical supoort folks to get the correct information for bridging two of their amps together.
  Reply With Quote
Old 2nd October 2003, 09:53 PM   #26
diyAudio Member
 
Join Date: Feb 2001
Location: Mars
We got a response;
http://www.carsound.com/ubb/ultimate...c;f=1;t=022066

Originally posted by Zapco Dave II:
In order to bridged two amplifiers, said amplifiers have to be single rail (dedicated mono) units. A bridging module is not necessarily needed, but it is CRITICAL that the gain structure for each amplifier is as close to identical as possible! Matching gains cannot be done by simply positioning each gain control in similar positions. There are several steps that need to be taken in order to do this correctly.

My advice would be to contact the manufacturer technical supoort folks to get the correct information for bridging two of their amps together.

--------------------------------------------------------------------------------


Richard Clark;
not true at all---------bridging two different amps is not much different than putting a 12 volt battery in series with a 6 volt battery to obtain 18 volts............RC



more


http://www.carsound.com/ubb/ultimate...1;t=001731;p=6

Richard Clark;
guys------its been so long and i have been so busy i can't even remember what has been covered and what hasn't-------at any rate i have no chance to spend much time on it now------a universal module that will work for any amp??????--------pretty difficult------or should i say rather complex in that such a versatile design would run the cost for most applications out of reason---------that is not to say that it cannot be done-------like i have stated-------ANY pair of amps can be bridged------some with better results than others-------amps are nothing more than "AC batteries" but unlike batteries they have more than 2 terminals------its the "other" terminals that can get you into trouble if you don't know what you are doing------i can easily bridge any two amps in a matter of minutes with no problem------if you have a pair that needs to be done badly enough then bring them to autosound and i guarantee that i can have any pair of amps bridged and working in 10 minutes or less or i'll pay you $1k for your trouble.................RC
  Reply With Quote
Old 2nd October 2003, 10:17 PM   #27
diyAudio Member
 
purplepeople's Avatar
 
Join Date: Mar 2003
Location: London, Ontario, Canada
Quote:
Originally posted by thylantyr
http://www.carsound.com/ubb/ultimate...c;f=1;t=022066

Zapco Dave II posted;

In order to bridged two amplifiers, said amplifiers have to be single rail (dedicated mono) units. A bridging module is not necessarily needed, but it is CRITICAL that the gain structure for each amplifier is as close to identical as possible! Matching gains cannot be done by simply positioning each gain control in similar positions. There are several steps that need to be taken in order to do this correctly.

My advice would be to contact the manufacturer technical supoort folks to get the correct information for bridging two of their amps together.
In general when bridging PA power amps, the gain is set to max so as to match them as closely as possible and levels set with the preamps or mixers.

:)ensen.
__________________
Those who claim to be making history are often the same ones repeating it.
  Reply With Quote
Old 2nd October 2003, 10:32 PM   #28
sss is offline sss  Israel
diyAudio Member
 
sss's Avatar
 
Join Date: Jul 2003
Location: Israel , haifa
Send a message via ICQ to sss
hellow guys

if u are talking about car amps then :

car battery is 12V so normal car amp will give u 12Vp-p (or 10-11Vp-p to be more accurate)
bridging two amps will give u 24Vp-p and thats it , u cant connect 2 bridged amps in series and get higher voltage (-higher power)
paralleling amps? well its possible , but why ? its better paralleling only the output transistors .


bridging 2 amps will give u higher voltage
paralleling 2 amps will give u higher current
  Reply With Quote
Old 3rd October 2003, 03:19 PM   #29
diyAudio Member
 
Join Date: Feb 2001
Location: Mars
Quote:
Originally posted by sss
hellow guys

if u are talking about car amps then :

car battery is 12V so normal car amp will give u 12Vp-p (or 10-11Vp-p to be more accurate)
bridging two amps will give u 24Vp-p and thats it , u cant connect 2 bridged amps in series and get higher voltage (-higher power)
paralleling amps? well its possible , but why ? its better paralleling only the output transistors .


bridging 2 amps will give u higher voltage
paralleling 2 amps will give u higher current
There are car amplifiers that run off the single +12v
battery, but there are also car amplifiers that have
high frequency switching power supplies (DC-DC converters),
12v input, +/- rail voltage output with isolated ground.
  Reply With Quote
Old 3rd October 2003, 03:58 PM   #30
diyAudio Member
 
Join Date: Sep 2002
Location: Colonia, NJ
Send a message via Skype™ to LukasLouw
"There are car amplifiers that run off the single +12v
battery, but there are also car amplifiers that have
high frequency switching power supplies (DC-DC converters),
12v input, +/- rail voltage output with isolated ground."

99% of car amps with switching supplies out there have no more than 1KOhm isolation between speaker and 12 volt grounds. The latest trend that I notice, is to connect speaker ground directly to 12 volt ground, with a diffferential input stage to break ground loops.

Lukas
  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
2 stk4050v bridged amplifier noubar Chip Amps 18 29th September 2013 05:48 AM
Im BAAAACK! Marathon amplifier question, won't work bridged mono! 240z4u Car Audio 11 3rd April 2008 02:56 AM
TDA amplifier , Bridge , 600 W . darkm4n Chip Amps 0 29th March 2004 12:48 PM
how to bridge an amplifier MV Car Audio 1 25th March 2004 05:11 PM
Sound of bridged amplifier Gabevee Solid State 17 23rd July 2002 09:01 PM


New To Site? Need Help?

All times are GMT. The time now is 09:27 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