Eclipse CD8454 vs. CD8053 ?

[james33440 10+ year member]

That is true about each having a 8V + and - RCA. That's what I was talking about. Also, the BLA doesn't send 16V, it's 10V. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

If anyone wants pics, I can take them now. My deck is still in my shed. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif I don't have the BLA but I can take pics of "all" the RCA's. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[squeak9798 5,000+ posts]

I used to own an 8053 AND the BLA.
The deal is, the HU has the ability to send a POSITIVE 8V and a NEGATIVE 8V for each (Front, Rear, Non-fader). The BLA then COMBINES the +8V and -8V and spits out a 16V balanced output. If the amplifier can only utilize 10v input, then that is all that it utilizes. The BLA however does convert to a 16v balanced signal.

NG

But if there is only a single cable coming out of the BLA for each output, then the signal is no longer balanced //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

 

[Hoot 10+ year member]

Yes, the deck does send the 16V to the BLA because of the + and - RCA's. However, you need the BLA "only" to convert the signal to a balanced 10V one. //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif

Again, precisely what I said. Well almost... from paragraph #2 of post #17:

Your head unit, when running the multiple pairs of RCAs (2 for each channel) produces 16 total, balanced volts. The BLA then converts the signal of these multiple RCA pairs back to 10-volts so that your amp can handle the input, and in doing this it converts the RCA runs from 6 pairs back to 3.

I called the signal "balanced" prior to the BLA.
In the Eclipse case, what does "balanced" actually mean with respect to the signal? What does BLA, or balanced line adaptor, mean? I realize James is saying that balanced refers to the signal following the BLA -- that the BLA balances the signal. Maybe this is precisely it. But... might it actually mean that the signal is balanced *prior* to the BLA and the adaptor then turns it into a traditional unbalanced signal? Might the the signal possibly be referred to as balanced because it has simultaneous positive and negative pairs? That is what I had orignally thought given the RCAs, following the BLA, turned normal (1 pair per front, rear, and sub), and normal = traditional = unbalanced.

I have enjoyed this discussion. //content.invisioncic.com/y282845/emoticons/thumbsup.gif.3287b36ca96645a13a43aff531f37f02.gif

 

[james33440 10+ year member]

Hoot, that's probably want it does. I was always under the assumption that you need the extra pairs of negative RCA's for the balanced signal. So, why then use a BLA to convert it back to a unbalanced signal? Maybe that's an easier way to boost voltage WAY UP.

Who knows. I don't even know what I am talking about. LOL.

 

[Hoot 10+ year member]

One thing is for sure, that is a lot of money for cables - 12 channels of 12-16 foot RCA adds up. Then, there is $100 for the BLA. Especially when you've already spent $600+ on the HU. Not to mention that's a lot of snakes running underneath your carpet. //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[squeak9798 5,000+ posts]

Ok, checked with my dealer today......

The outputs from the back of the HU are balanced outputs, the BLA converts that balanced signal back to an unbalanced signal for input into amps that don't accept direct balanced input.

So, the signal coming out of the BLA is an unbalanced signal, and should be mounted in your trunk (or near the amps, whereever they are).

 

[Hoot 10+ year member]

One thing is for sure- you need the BLA TO ACHIEVE 16v AND TO ACHIEVE balanced signal

Bend over, Max... //content.invisioncic.com/y282845/emoticons/spank.gif.0d78e34d42ea8780359e903aeb6697d6.gif
Just kiddin' ya. LOL //content.invisioncic.com/y282845/emoticons/smile.gif.1ebc41e1811405b213edfc4622c41e27.gif

 

[james33440 10+ year member]

Ok, checked with my dealer today......
The outputs from the back of the HU are balanced outputs, the BLA converts that balanced signal back to an unbalanced signal for input into amps that don't accept direct balanced input.

So, the signal coming out of the BLA is an unbalanced signal, and should be mounted in your trunk (or near the amps, whereever they are).

yeah, that's what I figured because you only have the one set of RCA's instead of the positive and negatives sets of RCAs.

 

[3.5Max6spd 10+ year member]

weird...Squeek I dont believe your dealer //content.invisioncic.com/y282845/emoticons/tongue.gif.6130eb82179565f6db8d26d6001dcd24.gif

Because you can run the deck unbalanced regardless by simply using a left and right pair from the 4 of each output-without the need of the BLA-so then what does that leave the purpose of the BLA to be?.... thats how 95% of 8053's are installed out there

The BLa converts a balanced signal onto single ended outputs so that they can be used with any amp.

 

[Hoot 10+ year member]

I don't understand what you don't understand, 3.5Max.

Without the BLA, you can't run all the snakes and you don't get the 16 volts traveling the length of your vehicle back to your amps. Sure, the voltage is converted back to a usable 8-10 volts just prior to the amps (essentially the same voltage as running w/out the BLA), but by using the BLA, the balanced signal helps to ensure that extraneous noise is rejected -- over the course of the run of the cables -- and so when it gets to the back of the vehicle, it is far cleaner/quieter than it would otherwise be.

 

[3.5Max6spd 10+ year member]

I don't understand what you don't understand, 3.5Max.
Without the BLA, you can't run all the snakes and you don't get the 16 volts traveling the length of your vehicle back to your amps. Sure, the voltage is converted back to a usable 8-10 volts just prior to the amps (essentially the same voltage as running w/out the BLA), but by using the BLA, the balanced signal helps to ensure that extraneous noise is rejected -- over the course of the run of the cables -- and so when it gets to the back of the vehicle, it is far cleaner/quieter than it would otherwise be.

What I've been saying is that you cannot get 16v balanced WITHOUT the BLA- what about that is hard to understand? From what you just stated, it seems we are on the same boat.

 

[3.5Max6spd 10+ year member]

Squeek....hoping werewolf @ ECA can speak on the matter- I bumped your thread

 

[squeak9798 5,000+ posts]

What I've been saying is that you cannot get 16v balanced WITHOUT the BLA- what about that is hard to understand? From what you just stated, it seems we are on the same boat.

The BLA won't give you 16V balanced because the signal coming out of the BLA is no longer a balanced signal //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif The HU will give you 16V balanced output, and 8V unbalanced output.

What the BLA allows you to do is run a balanced signal to your trunk with amps that doesn't accept a balanced signal. So, you run the balanced signal to the trunk (to reduce induced noise through the long run through the car), then convert it back to unbalanced via the BLA for amps that don't accept balanced input. That's it's purpose; to run a balanced signal with amps that don't accept balanced inputs. So, you run the balanced signal to the trunk, then have the BLA convert it back to unbalanced for the amps.

 

[3.5Max6spd 10+ year member]

The BLA won't give you 16V balanced because the signal coming out of the BLA is no longer a balanced signal //content.invisioncic.com/y282845/emoticons/wink.gif.608e3ea05f1a9f98611af0861652f8fb.gif The HU will give you 16V balanced output, and 8V unbalanced output.
What the BLA allows you to do is run a balanced signal to your trunk with amps that doesn't accept a balanced signal. So, you run the balanced signal to the trunk (to reduce induced noise through the long run through the car), then convert it back to unbalanced via the BLA for amps that don't accept balanced input. That's it's purpose; to run a balanced signal with amps that don't accept balanced inputs. So, you run the balanced signal to the trunk, then have the BLA convert it back to unbalanced for the amps.

Yeah I agree. The end result is an unbalanced signal if the amps dont accept it as such. How about in your application? Does that mean you'll get 16v straight from the deck?

So the BLA would be positioned closest to the amp, not the source according to your explanation with the lenght of the runs direct from the source. Holy moly rca costs //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

 

[squeak9798 5,000+ posts]

Yeah I agree. The end result is an unbalanced signal if the amps dont accept it as such. How about in your application? Does that mean you'll get 16v straight from the deck?

Should. 8V + and 8V - for each channel.

So the BLA would be positioned closest to the amp, not the source according to your explanation with the lenght of the runs direct from the source. Holy moly rca costs //content.invisioncic.com/y282845/emoticons/crazy.gif.c13912c32de98515d3142759a824dae7.gif

Yup, and Yup //content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif

That's the main thing that is steering me away from doing it (that and the fact I don't know if my amps will survive with 16V input). I had to go spend another $50 on RCA's this week end just to be able to run a 3-way system (highs, bandpass, sub). I'd lay down another $75 if I wanted to go balanced active //content.invisioncic.com/y282845/emoticons/eek.gif.771b7a90cf45cabdc554ff1121c21c4a.gif