How to bridge both pair of channels of JL audio a4300 (or e4300)

Hi,

I have a simple question, Actually I cant believe myself for asking that but I am in a very strange situation.


I am running a pair of Morel Tempo 6 and single JL Audio 10w3v3 with my amp.. it sounds fine.. however It lacks a little bit of power and control with my speakers at higher volumes... so I have decided to buy a new mono amp for my sub, and bridge the a4300 to drive my Morel Tempos...


As far as understood from the manual, I bought a pair of "Y" cable to feed Channel1 and Channel2 with "right" signal and the others with "left" signal and connect the speakers as the manual describes... finally make a conservative gain setup and played ...

The sound was very very bad...when I came to 30-35(max62) from the head unit, it creates lots of distortion, clipping, weird, ...simply very bad sound ...


I have also realized the car lights are shaking ... it seems that takes a lot of current from battery even if the the engine running...

I have checked the amp temp, but it was cool..also the power ale is cool too (8awg)

I was very good before (with a sub and a pair of Tempos) also very loud without any distortion ...

What is wrong about my setup ?

Thank you....

 

Hi,

I have set the gains according to what the a4300documentation says, and a bit lower to protect my components.... The documentation informs that with 1khz signal, and no sound enhancements, the output voltage should be 24.6V .. but I declined a bit and set 20V


So I dont think that it is about the gains... and the connections of the speakers are as same the manual describes...

 

My components are 4ohms..

It works fine when you bridge a pair of channel for sub, and run a set of components with remining ones... how ever the things change when your bridge all


The documentation describes as follows, I think this is the way I sohuld go and what I have tried ..

"1) Left Channel Only or Right Channel Only
Information: If you wish to send a left-only
or right-only signal to a pair of the A4300’s
channels, use a “Y-Adaptor” to split the single
channel signal into both left and right RCA
inputs. This option is useful when using a pair
of the A4300’s channels to drive left channel
speakers only and the other pair of the A4300’s
channels to drive right channel speakers only."


I think I am doing what it is written ... right ? ?

 

You are right about my Y-Adapter configuration

there is an input selection switch for 3th and 4th channels.... It can be "Discrete" or "1&2", I have selected "Discrete" ....

the description of the usage as follows


"If you wish to send four discrete channels into
the A4300, simply use all four inputs (channels
1 & 2 and channels 3 & 4) and set the “CH 3&4
Input From” switch to “Discrete”.
If you wish to feed all four channels by using
only two channels of input, set the “CH 3&4
Input From” switch to “1&2” and use only the
inputs to channels 1 & 2."

 

I have set the HP and LP filters off and also the bass boost.

My deck is pioneer deh-p6000 has two deck outputs... I use one pair or them for this configuration.

To test my system I switched the HP to 50,63 and 80 Hz ... also switched this off too .. but nothing changes.... The sound is simply terrible whatever I choose...

 

This is how the connections looks like

Sorry for bad drawing...

 

I am going to try it,

However if I do that, IT should be dual mono .. because the amp sums the signals of channel 1,2 and channel 3,4

 

I think I have found the problem ...

The channel2 has a problem with my right component set.

When I connect the right component set to this channel(not bridged, just single) it sounds really bad.... but if I connect this speaker to my other channels, it sound fine....


The problem is, when I connect the other speaker (left component set) to this channel, it sounds fin (!?!) ... or If I connect a subwoofer to this channel it sounds right too ....


Simply my component set(right one) dose not like the out put of channel 2....
I will try the other channels (channel3&4)


I am very confused about that!

 

Yes,

The situation is very very confusing.....

I have realized that the problem is getting worse when the amp is getting hotter.. if the amp is cool, there is no problem ...

I have tried the other channels (3rd and 4th) Right component set works fine on the 3rd channel.. bad on 4th channel...

Tomorrow I am going to change the crossovers ...

 

I am going to uncover the doors again, and check the crossovers tomorrow.. but if one crossover is broken, how on earth it works on the other channels...?? !?!? ?!