Expert HELP on How to use RCAs from HU into amp (bridged amp) left right seperation?

[mendon mafia 10+ year member]

ok so im trying how to figure out how to get left and right seperation while my amp is bridged.

My amp is the SOUNDMAGUS (only one "N", the "N" in sound) CP91. heres a link to the amp:

http://www.soundmagus.com/CP91.html

Lets start with some background. Im only running front speakers (component set being ran passivly) My amp is a 4 channel and is bridged.

as of now i have front right and left from my headunit plugged into the A inupt RCA's of my amp. the B RCA inputs for the amp are not being used nor are the rear outputs of the HU. The amp is set with A as the master.

The B output channels of the amp are bridged and powering the right side of my speakers. the A output channels are also bridged and are powering the left side.

When i set the fader to the middle both sides are the same volume when i fade to the right there is no change. when i fade to the left the volume goes down by about half but on both sides (both sides put out the same volume only less of it)

What i want is to have it when i fade to the right the rights are on full power and the left is off anf visa versa. I want it this way because some of the music i listen to has sweeps from right to left and i dont want to miss out on these.

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[wesl56 10+ year member]

im guessing you dont have the manual, cause it should explain this in there, but heres how it usually goes (note that some amps dont require you to use Y splitters to feed both l and r inputs when in bridged mode, some do... you might wanna look into that):

you have the amp in 2ch mode, so turn the switch for that off

the rca cable hooked up to the left output of the headunit needs to go into a Y splitter, and then into the left and right A inputs on the amp

the rca cable hooked up the the right output from the headunit goes to another Y splitter, and then into the left and right B inputs

with this setup your headunit's left output channel is feeding the A side and the right output is feeding the B side

like i mentioned tho, some amps have a mode that wont require you to use a Y to feed both the l and r inputs when bridging two output channels, but typically they do

 

[mendon mafia 10+ year member]

yea i dont have the manual. I sent the company an email to try and get one but i dont think there going to reply.

so if i use a splitter i will be fine then?

why does nothing happen when i fade the headunit to the right? shouldnt the volume still decrease at least?

Im goin to try using splitters and see it that helps.

if i dont use splitters and leave it the way it is will i be able to hear all the fades in the music?

 

[wesl56 10+ year member]

why does nothing happen when i fade the headunit to the right? shouldnt the volume still decrease at least?

When i set the fader to the middle both sides are the same volume when i fade to the right there is no change. when i fade to the left the volume goes down by about half but on both sides (both sides put out the same volume only less of it)

it seems that the amp is only operating off of the input from the headunit's left output

 

[fasfocus00 5,000+ posts]

ok so im trying how to figure out how to get left and right seperation while my amp is bridged.
My amp is the SOUNDMAGUS (only one "N", the "N" in sound) CP91. heres a link to the amp:

http://www.soundmagus.com/CP91.html

Lets start with some background. Im only running front speakers (component set being ran passivly) My amp is a 4 channel and is bridged.

as of now i have front right and left from my headunit plugged into the A inupt RCA's of my amp. the B RCA inputs for the amp are not being used nor are the rear outputs of the HU. The amp is set with A as the master.

The B output channels of the amp are bridged and powering the right side of my speakers. the A output channels are also bridged and are powering the left side.

When i set the fader to the middle both sides are the same volume when i fade to the right there is no change. when i fade to the left the volume goes down by about half but on both sides (both sides put out the same volume only less of it)

What i want is to have it when i fade to the right the rights are on full power and the left is off anf visa versa. I want it this way because some of the music i listen to has sweeps from right to left and i dont want to miss out on these.

maybe you don't understand the concept of bridging. you are taking a stereo signal and making it a more powerful mono signal. mono mean "one", there is no left and right. if you want to adjust the sound you'd need to connect the rear output of you headunit to the rear of the amp. btw the fade if from to back and balance if left to right.

 

[wesl56 10+ year member]

maybe you don't understand the concept of bridging. you are taking a stereo signal and making it a more powerful mono signal. mono mean "one", there is no left and right. if you want to adjust the sound you'd need to connect the rear output of you headunit to the rear of the amp. btw the fade if from to back and balance if left to right.

that's when you're bridging a 2ch amp for a sub, but he is bridging a 4ch amp for a front stage... hes bridging channels 1 and 2 together for the left, and channels 3 and 4 together for the right. he's just gotta get the correct signal sent to each bridged side to be running in stereo

 

[fasfocus00 5,000+ posts]

that's when you're bridging a 2ch amp for a sub, but he is bridging a 4ch amp for a front stage... hes bridging channels 1 and 2 together for the left, and channels 3 and 4 together for the right. he's just gotta get the correct signal sent to each bridged side to be running in stereo

he's only got 1 left and right signal, how do you fade 1 left right signal that's being bridged? you can't. trust me, I'm right, he's gonna have to run the rear pre-out from the headunit to the amp.

 

[TurdFergueson2 5,000+ posts]

Maybe you have the rcas plugged into the wrong preouts. Like if you have 3 sets, you have them going into the sub outs or something.

 

[wesl56 10+ year member]

he's only got 1 left and right signal, how do you fade 1 left right signal that's being bridged? you can't. trust me, I'm right, he's gonna have to run the rear pre-out from the headunit to the amp.

he said "fade" but he meant "balance", as he only has two speakers... read the op

Im only running front speakers (component set being ran passivly) My amp is a 4 channel and is bridged.

 

[fasfocus00 5,000+ posts]

he said "fade" but he meant "balance", as he only has two speakers... read the op

why don't you learn how to do installs instead of telling me how to read. if he only has 1 set of RCAs in, it doesn't matter how many channels it goes through, you can't fade or balance the signal if it's bridged. how do you think the signal gets to the other channels? the amp just passes the signal through. the source unit controls the fade and balance not the amp. you trying to tell me that the way you bridge a 2 channel amp is different than a 4 channel amp? he needs to run 2 sets of RCAs (front and rear) to be able to control either fade or balance. if he connects both lefts to the front, that'll be the left, if he connects both rights to the rear that'll be the right. this is how he would balance left to right. if he just keeps the front to front and rear to rear he would have to use his fade control but it would still only change sound from left to right.

 

[squeak9798 5,000+ posts]

why don't you learn how to do installs instead of telling me how to read. I forgot more car audio stuff this morning than you've ever known. if he only has 1 set of RCAs in, it doesn't matter how many channels it goes through, you can't fade or balance the signal if it's bridged. how do you think the signal gets to the other channels? the amp just passes the signal through. the source unit controls the fade and balance not the amp. you trying to tell me that the way you bridge a 2 channel amp is different than a 4 channel amp? he needs to run 2 sets of RCAs (front and rear) to be able to control either fade or balance. if he connects both lefts to the front, that'll be the left, if he connects both rights to the rear that'll be the right. this is how he would balance left to right. if he just keeps the front to front and rear to rear he would have to use his fade control but it would still only change sound from left to right.

You are a fucking idiot. He does not need to use the rear outputs of the headunit.

wesl56's first post was correct. Use y-splitters to send the "left" signal to both channels 1 & 2 and the "right" signal to both channels 3 & 4.

 

[SicAudio 5,000+ posts]

he's only got 1 left and right signal, how do you fade 1 left right signal that's being bridged? you can't. trust me, I'm right, he's gonna have to run the rear pre-out from the headunit to the amp.

FASfocus is 100% correct. look up the manual and you will see //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[squeak9798 5,000+ posts]

FASfocus is 100% correct. look up the manual and you will see //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

Or he could save time and money and just use y-splitters //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

 

[wesl56 10+ year member]

why don't you learn how to do installs instead of telling me how to read. if he only has 1 set of RCAs in, it doesn't matter how many channels it goes through, you can't fade or balance the signal if it's bridged. how do you think the signal gets to the other channels? the amp just passes the signal through. the source unit controls the fade and balance not the amp. you trying to tell me that the way you bridge a 2 channel amp is different than a 4 channel amp? he needs to run 2 sets of RCAs (front and rear) to be able to control either fade or balance. if he connects both lefts to the front, that'll be the left, if he connects both rights to the rear that'll be the right. this is how he would balance left to right. if he just keeps the front to front and rear to rear he would have to use his fade control but it would still only change sound from left to right.

yes, thats what you're not understanding. i've already explained it, so mendon mafia, hope that clears it up for you.

 

[fasfocus00 5,000+ posts]

Or he could save time and money and just use y-splitters //content.invisioncic.com/y282845/emoticons/rolleyes.gif.c1fef805e9d1464d377451cd5bc18bfb.gif

yeah go ahead and skimp on the some splitter. that's the cheap shop manager that just wants to get the car out the shop. sorry man that's not how things should be done. he'll be much happier doing it the way that I said than taking a short cut like you suggest. thanks for calling me fvcking idiot b/c I'm right and you're lazy.