Pretty self explanatory. Im considering getting a H701 Processor to pair up with my 9835.

The 9835 doesnt have optical out, and cant control the H701, hence i also need the RUX-C701.

Setting it up, do i pass the audio via Ai-Net (from my understanding - yes), or via RCA?

Is this setup ideal? I dont really want to get a new optical HU just for the purpose.

Is there enough "SQ" via Ai-Net? Is it noisy or anything? ANY information regarding how id be setting it up would be appreciated.

Im not sure if i should do it or not. Ive maxed out the tunability of the 9835 (Bass Engine Pro, crossovers, 5 band PEQ, and 0.1ms T/A). And in saying that, without tooting my own horn, it sounds damn awesome, and im more than happy to leave it as it is. I dont think i would be able to get it any better, as i dont really use much EQ at all, i think i only have 3 EQ points in the whole thing.

From my understanding, ill be gaining the following:
* 31 band EQ
* 0.05ms T/A
* More crossover options and more slopes (30db, and 36db if im not mistaken?)
* The ability to run proper 3 way active + sub (currently i use the front preout for both 4" and tweet, meaning they are T/A'ed together, with my MRV-F545 doing the crossovers actively).
* I can run an MRV-F545 per side, one for left, one for right for uber good stereo separation.
* Anything else?

So, from my understanding, you would normally use optical out to send the audio to the processor, and its superior DAC's convert it, then send the signal to the amps via RCA. Whereas, if i set it up with Ai-Net, the HU DAC's still convert the audio, and send it analogue to the PXA, correct? Any downsides to this?

Also, what exactly does the RUX control (other than the processor). Is it volume via the RUX, and track selection etc etc via the 9835 still? If so that would be crap, because id probably have the RUX in the top HU DIN spot (in my AE92 Corolla), and the HU down below in the double DIN spot. I could put them together down the bottom, but this leaves the top spot empty. Can i still control everything via the 9835, and only use the RUX for adjusting settings? (This means i have the option to mount it in the car or not, which is a good thing)

Any info regarding the proposed setup, or any suggestions, would be awesome, before i go making the purchase.

Cheers!

yeah 99% sure you can just use the head unit for everything that isnt related to the PXA, like track, volume etc

although you can still adjust the volume using the RUX if you wish however i believe that it has the push in style button so you can set the volume, push the button in and forget about it

also i dont think you can adjust the RUX to have all the pretty colours that you love your 9835 for so much

If you use ainet connection to your hud the hud controls volume if you use rcas you have to control volume from the rux.
I will be getting a hud with optical you cant hear anything while music is playing but if you put it down to 0 volume i have niose that of never had with my car till after pxa was installed
The rux only has to be in the car while setting pxa then you can unplug and store rux if your connected with ainet or optical
Im only new to pxa so some of the more experenced guys should be able to help you more Pulse-R
31 band eq yes
0.5 T/A yes
crossover slope 36db no not from my understanding 30 db max
cheers xwfalcon

awww Mr maD , A pxa701?, u gonna go centre channel?

Thanks for the help so far. Yes, im waiting for the likes of shiny_car and/or Pulse-R to help.

zion, nah, im not going 5.1 or a centre channel. Just keeping what i have.

Basically i have a chance to buy a PXA for an unbeatable price (mates rates) so i dont think i should pass it up.

what have they ever won

hello

the PXA AiNet connection converts the H/U analog back to digital using a (not very nice) Analogue to Digital converter.

best to have digital if you can, but that HU not so it will likely have hiss noise.


otherwise, you know what features you want and the PXA has it.
the AiNet and the RCA use the same input internally, so no joy there.

I may look at a kit for external ADC or analogue input mods for the PXA, but that's a while away yet.

RCA.

No, not ideal. The H701 ADC-DAC circuit is noisy as f**k.

Ai-net wont be carrying your CD stream. Thats through RCA. It will carry radio though, and you wont notice any change there, plus it will also carry your control signals.

If it aint broke, why fix it? Keeping that in mind, the PXA is only a step up from current.

- Yes on the EQ (independant L/R)
- Yes on the TA (though a good installation doesnt rely on this, as you know
- Yes at 30dB (which is really quite horrible with the phase shift IMO) No at the 36dB (The P90 is 36, not the Alpine)
- Yes.
- You will NOT achieve any more stereo separation then you have now, if you have a good system already. Anything you will achieve, will be below audible levels. If you do increase SS, you have something else wrong in your system.

Yes. As mentioned before, your sending through Digital->DAC->RCA->ADC->Digital Processing->DAC->RCA. In the Alpine, its noisy.

You can setup using the RUX, then disconnect it and leave as is, using the Head for all your incar requirements (volume, track etc.)

hello, too.





CD audio will be via Ai-NET. there is NO need for RCA connections between the HU and PXA. there is a switch underneath all Ai-NET HUs (incl the 9835 of course). when you add the PXA, switch it to 'EQ/DIV' instead or 'NORM'. this activates the Ai-NET connection to suit the PXA, including sending audio. it will look something like this:

Click to view attachment

if you're really keen on SQ, then keep an eye out for a (secondhand) CHA-S624 CD changer. this has been discontinued for over a couple years now, but was the last one to feature a digital output. they crop up every now and then on ebay or here. alternatively, an older S604 or the DVD changer, DHA-S680 (older) or DHA-S690 (current). these provide a great upgrade option for the system; don't go too old, or else have it sent to alpine for a service first to ensure the laser is as-new.

Ahaha! I never had a need to flick that switch, so never utilized it! Goes to show

you're such a n00b. J/K!

Damn! Thats a shame. Its probably not a good idea then. I definitely dont want to have to buy a new HU. I think the only thing i would 'upgrade' to would be a CDA-7998R, which will probably be a bit tough to find now that they are discontinued. That, and im not even sure if it would fit in my car anyways, due to the 1.3 DIN face. OR, a DVD HU.



Fair enough. I was only really considering it because of the price i can get a H701 + Controller for, and basically thats the next 'step' from where i am now, if i want to get the stereo sounding better.


Even though shiny corrected you, regarding the RCAs and Ai-Net, i am guessing it will still be:
Digital>DAC>Ai-Net>ADC>Processing>DAC>RCA>Amp

Which is still noisy and far from ideal? Just how noisy? I have a very slight hiss/noise at 0 volume, which i think is common to all Alpine HU's, is it much louder/worse than this?



Yeah, i knew that would need changing. Thanks for clearing it up.


That is an option aswell, however, like everything, requires more money.

Looks like ill just have to leave my setup as is. :\

Thanks all for the help, awesome information as per usual, much appreciate it.

If you have anything further to add, feel free!

Cheers
Rick.

The 7998 face rotates outwards, so it actually fits in a 1 din pocket, even though its 1.5 DIN worth of real estate.

Yeah i know that the HU is still 1DIN in size, but the face would probably hit the dash.

Here is what i mean, the top left corner...



AE92 Corolla dash. Not sure if you are familiar with it.

7998 would have trouble in there, and still a bit noisy.

I'm investigating the IVA D105, and the DVA 9861 next week... will buy the one with least noise/best sound.

Please let us know Pulse-R how you go with new huds as im finding the noise from pxa ,ainet connection to my 9887 more frustrating than before now ive had more time to listen and will be going down same path trying to buy hud with optical out i was going to wait for iva-502e but not sure at the moment just want something with good sq and no noise when hooked up to pxa

cheers xwfalcon

Ah, so you are using a 9887 + H701/RUX, as i propose to use it, and you have audible noise?

I guess its not a good idea for me then. Dont think i want to spend more money on an Optical HU.

Yes thats my setup and would be the same as you, would run pxa through ainet cable cant here noise most of the time but on quite pieces of music when instruments stop and just singing can hear hiss not acceptable to me .

I will get opitical hud as love all the adjustment on pxa plus i need it for active 4 way as i have no factory passive crossovers for my 3 ways

cheers xwfalcon

mark..
I'll be running the exact same setup as you in the senator.. when i get my H701 next week..

for me.. i probably wont hear the hiss due to my disability... but it offers the extra control i need.. and am planning on getting a double din unit closer to the end of the year (looking at the w502e) as it'll fit in the VT dash..



might get simon to do some mods on it..

Thats great damo you will love all the functions on h-701 the hiss wasnt a concern at first but after a while ive started to notice it more my car came with factory premium sound system so i have 2din dash facia ready to go for 502e im a bit disappionted you cant get blackbird navagation for 502e in australia ,i changed dash for single din for 9887 when i started .But at the moment of got battery trouble grrrr got back to the factory tonite and my car wouldnt start and had trouble this morning d34 optima is only a month old grrrrrr

hmmm... pity bout the battery...

thanks for the heads up...

interesting about the 701 and 9887 combo

let us know if someone goes the 502 + 701 combo as im entertaining that idea myself in the aristo

I got the DVA-9861 seems to work ok