My install's coming along nicely

[LosIsATool 5,000+ posts]

One CAN have only a single stereo input from a HU to a DSP, but why then did Alpine design and build a HU with six outputs and a DSP with six inputs? Funny how no one here can answer for me that question.
And in fact, you COULD only have ONE input to a DSP and let the DSP do all the signal splitting, etc. for it's multiple outputs.

John Kuthe...

Do you think they design HUs with the idea of hooking up a DSP? The outputs(preamp) on the HU is F/R/Sub. With a DSP, EVERY DSP they only need a single full range.

 

[JohnKuthe]

Do you think they design HUs with the idea of hooking up a DSP? The outputs(preamp) on the HU is F/R/Sub. With a DSP, EVERY DSP they only need a single full range.

I'd be fascinated to know exactly how my Alpine HU does it's internal signal splitting up between it's SIX RCA outputs. I'm pretty sure the two subwoofer outputs are simple low pass filters. And I know the INPUT to the HU is simple recorded stereo signal separation. But what and how does it generate front and back signals so separate and distinct they require separate RCA outputs? This I do not know, but I'm gonna run with it because I trust the engineers who designed this HU kinda knew what they were doing.

And I KNOW that once you get a signal into a DSP it can do anything with that signal it is designed to do with it. I'm an Electrical Engineer, remember? I learned how to design many simple digital and analog circuits and I know what signal processing is, and it's vastly complex.

John Kuthe...

 

[LosIsATool 5,000+ posts]

I'd be fascinated to know exactly how my Alpine HU does it's internal signal splitting up between it's SIX RCA outputs. I'm pretty sure the two subwoofer outputs are simple low pass filters. And I know the INPUT to the HU is simple recorded stereo signal separation. But what and how does it generate front and back signals so separate and distinct they require separate RCA outputs? This I do not know, but I'm gonna run with it because I trust the engineers who designed this HU kinda knew what they were doing.
And I KNOW that once you get a signal into a DSP it can do anything with that signal it is designed to do with it. I'm an Electrical Engineer, remember? I learned how to design many simple digital and analog circuits and I know what signal processing is, and it's vastly complex.

John Kuthe...

You are the absolute dumbest Electrical Engineer I've ever seen.

It's sending the same info to the rear it sends to the front. It just gives you a fader

 

[JohnKuthe]

You are the absolute dumbest Electrical Engineer I've ever seen.
It's sending the same info to the rear it sends to the front. It just gives you a fader

And you know this how? Yes, seems very simple but how do you KNOW this? Separate dedicated isolated from each other F and R preamp signals, or just a simple signal splitter off each of the two simple stereo source L and R preamp circuits??

You are probably correct. But I doubt you KNOW this 100% as a fact from the EVIDENCE of how the internal preamp HU circuits are designed and built. I think you are just accepting this as fact with little to no corroborating objective EVIDENCE, which is what I call "belief": accepting as fact with little to no evidence.

John Kuthe...

 

[LosIsATool 5,000+ posts]

And you know this how? Yes, seems very simple but how do you KNOW this? Separate dedicated isolated from each other F and R preamp signals, or just a simple signal splitter off each of the two simple stereo source L and R preamp circuits??
You are probably correct. But I doubt you KNOW this 100% as a fact from the EVIDENCE of how the internal preamp HU circuits are designed and built. I think you are just accepting this as fact with little to no corroborating objective EVIDENCE, which is what I call "belief": accepting as fact with little to no evidence.

John Kuthe...

It's called 25 years of doing it over and over. Also the FACT music is only recorded in 2.1. Again, doubt us all. If that all you are going to do please for the love of god, go away.

 

[NSTALN 10+ year member]

One CAN have only a single stereo input from a HU to a DSP, but why then did Alpine design and build a HU with six outputs and a DSP with six inputs? Funny how no one here can answer for me that question.
And in fact, you COULD only have ONE input to a DSP and let the DSP do all the signal splitting, etc. for it's multiple outputs.

John Kuthe...

That is correct....which is why I stated that the inputs can be configured to match your output configuration. I also own the PXA-h800 and the RUX.

When the input config is set to 5.1 you can use all of the outputs from your multi-channel RCA output headunit. In that config all channels will be considered 'AUX 1'.

Also correct a single optical input can be used withe the PXA-h800.

**I will add a quick note that the PXA may have (6) physical RCA inputs and your standard HU may have (6) physical outputs, these do not actually correspond intentionally as 'channels'...by this I mean when in 5.1 input config the PXA accepts inputs for front left(1), front right(2), rear left(3), rear right(4), center(5), sub(6). The output RCA's allow for (8) channels; FL high, FL low, FR high, FR low, RL, RR, Center, Sub. **

 

[JohnKuthe]

It's called 25 years of doing it over and over. Also the FACT music is only recorded in 2.1. Again, doubt us all. If that all you are going to do please for the love of god, go away.

Remember quadraphonic sound? I do, back in the late 1970's. It was a failed attempt at expanding the "stereo standard" to four discrete and distinct sound channels. And while I was merely a teenager I had the idea of an EIGHT channel audio system which could reproduce a moving audio signal in a room so spatially accurately it would sound on playback like the object emitting the sound was moving around in the room, and would that not have been really cool. Born to be an EE I suppose.

John Kuthe...

 

[The_Quiet_One 10+ year member]

Born to be an EE I suppose.
John Kuthe...

But yet you're not a EE...You're a RN because apparently you couldn't hack being an EE or a programmer.

 

[JessyBoy86]

I can't see what you're trying to do with this setup....but why the hell do you have RCAs going to the dsp and others straight to the amp ?

You just need a pair of full range RCAs from the HU to the DSP and then you dispatch everything from the DSP to all amps....im new to all this and i know what to do cuz it's kind of basic knowledge and i listen to what people here tell me. I wont ever hire a drunk "instaler guy" to do stupid things like this and rely on him.

You really need to cut the EE bullshit and listen to what real experienced dudes here has to say ! You only need to use all those RCA inputs in case you need all of those to build a full range signal for "x" reasons, like you might have to do with high level inputs for your speakers.

 

[hispls 5,000+ posts]

Remember quadraphonic sound?

Ever heard of 7.1 surround? It works ONLY when recorded with 7 channels and mixed for that sort of playback.

 

[LosIsATool 5,000+ posts]

Ever heard of 7.1 surround? It works ONLY when recorded with 7 channels and mixed for that sort of playback.

Not completely correct. Mine does 7.1 with logic 7. It's upmixed. Sometimes it sounds right and sometimes it don't.

 

[hispls 5,000+ posts]

Not completely correct. Mine does 7.1 with logic 7. It's upmixed. Sometimes it sounds right and sometimes it don't.

So basically it doesn't really work if the source material isn't recorded for that many channels. I've used "mixed" "surround" and IMO it sounds garbage when compared to a proper stereo setup.

 

[JohnKuthe]

I can't see what you're trying to do with this setup....but why the hell do you have RCAs going to the dsp and others straight to the amp ?

No, I'll have all six of the RCA outputs from my Alpine CDE-153BT HU going straight into the six RCA inputs of my Alpine PXA0H800 DSP. None of the outputs from my HU will be going to the speakers as they are right now.

You just need a pair of full range RCAs from the HU to the DSP and then you dispatch everything from the DSP to all amps....im new to all this and i know what to do cuz it's kind of basic knowledge and i listen to what people here tell me. I wont ever hire a drunk "instaler guy" to do stupid things like this and rely on him.

Yes but again I ask YOU, why does my Alpine CDE-153BT HU have SIX RCA outputs and my Alpine PXA-H800 DSP has SIX RCA inputs? Aha! ;-)

John Kuthe...

 

[LosIsATool 5,000+ posts]

So basically it doesn't really work if the source material isn't recorded for that many channels. I've used "mixed" "surround" and IMO it sounds garbage when compared to a proper stereo setup.

It depends. I unhooked the rears because it was normally nothing. Some tracks would have a bit more depth. One day I'm going to do every channel.

 

[JohnKuthe]

So basically it doesn't really work if the source material isn't recorded for that many channels. I've used "mixed" "surround" and IMO it sounds garbage when compared to a proper stereo setup.

True audiophiles eschew ANY and ALL signal processing, digital or otherwise. Analog only, as hi fi as they can get!

John Kuthe...