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Alpine PXA-H800 Processor Discussion Thread

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#3,062 ·
Hi Jim, I have a 2018 bmw m240 that came with the basic low-fi sys. I replaced the oem drivers in the front doors with Focal ifbmw's with in-line passive crossovers, the rear deck sp were replaced with jl C5-400cm mids, C5-075ct tweeters, and C5-525-XO. The amp is a JL xds 600/6v2 connected via the analog feed from the oem hu with a Technic harness. I purchased the Alpine HUX-h800 and am having difficulty getting the auto calibration to work as i keep getting the "volume too low" on both TCR and imprint despite increasing the input sensitivity on the amp. Also prior to running the imprint it calibrates the volume from the hu and i get "ok"
 
#3,063 ·
i tried doing a search and have spent hours combing through posts in this thread and others. I am trying to setup rew to properly suggest crossover filter settings that match the h800. I have read through all associated data and spec sheets. and alpine does not list what the crossover filters are, and if they change when going from 1st order to 2nd or 3rd order (6db,12db,18db etc. etc.)

based on all the info i have found i think it is reasonable to assume they are butterworth filters.. but can someone tell me for sure exactly what the filters are at each slope.. are they linkwitz riley, butterworth, bessel, etc?

it is just a huge time saver and helps with the learning curve of room eq wizard if i can get its suggested settings matched to the h800,s capabilities.. and i am basically a complete neophyte.
 
#3,065 ·
maresgti12 said:
Just an FYI Subwoofer level control is now available through the controller. You will need to send in the controller to Alpine to get it updated.

Sent from my SM-G950U using Tapatalk
Click to expand...


That's been available since way before I bought mine.. did you send it to them to have the firmware updated? The version for use with ina-w910 has sub level control on the head unit and the version you use with decks like the cda-9887 have sub level control on the rux.

As a side note to all you guys running the h800.. what average temps do you see on yours? Mine seems to hover around 117°F it's never caused a problem yet it seems high????
 
#3,068 ·
NeedfulThink said:
I connected my H800 (incl. RUX) via AI from HU (IVA D800R at EQ-Mode).
How can I additionally use one of the 3 AuxIns?
Click to expand...
Hi there NeedfulThink. I got notice of your post tonight (No idea why I haven't seen the earlier posts this year as well!)

To use AUX inputs, when Ai-Net is connected via an Alpine head unit currently I'm having to use the KCA-410c dual AUX input & dual CD changer input expander module. That allows me to switch to AUX input mode from the head unit Source button and it uses the Ai-Net analog stereo path on the bus to route audio to the PXA-H800 (just as my PXA-H701 I formerly owned did).

According to the PXA-H800 documentation:

"When an Ai-NET compatible head unit is connected, the source should be switched at the head unit. This feature is disabled on the Commander"

...which I'm sure you're probably already aware of.

However, as the PXA-H800 has the AUX capability built-in, it would make sense logically that we should be able to switch the PXA-H800 AUX input sources from the Ai-Net head unit.

Unfortunately I'm not convinced that's true, and I'll need to verify this by removing my KCA-410c and seeing if my DVA-7996 will still switch to the H800's AUX inputs.

For now, I can recommend you look for a low-priced KCA-410c. When I checked tonight the prices on eBay were ridiculously high (some of these eBay sellers are pretty stupid!) but I paid less than $100 as I recall. I've seen them for much cheaper :)

Hopefully this helps!
 
#3,069 ·
BillC said:
i tried doing a search and have spent hours combing through posts in this thread and others. I am trying to setup rew to properly suggest crossover filter settings that match the h800. I have read through all associated data and spec sheets. and alpine does not list what the crossover filters are, and if they change when going from 1st order to 2nd or 3rd order (6db,12db,18db etc. etc.)
Click to expand...
Hi Bill. That's a great question. As I believe, but would need to try to confirm, that they're likely Linkwitz-Riley crossovers and not Butterworth as if I'm not mistaken most car audio digital signal processors (DSPs) are L-R type.

Also the crossover types would not change based on the filter order, unless specified elsewhere. As I recall from my transforms class at college it was just another digital implementation of the same filter but basically an extension on the 1st order function.

I'm trying to recall if the PXA-H701 I used to used specified the order type, but I can't recall at the moment. However I'm 75% confident about it being L-R filter types as it's quite a "loose" standard in the industry.

I hope this helps some! I'll try to look and see if I find out more. Please post a comment or message me if you don't hear back, as sometimes I'm juggling several things during the week and I "drop" one if you will :)
 
#3,070 ·
BillC said:
As a side note to all you guys running the h800.. what average temps do you see on yours? Mine seems to hover around 117°F it's never caused a problem yet it seems high????
Click to expand...
Yeah, it's probably not a real issue, but that's definitely a bit warm for an audio DSP IC. Mine is also around 117-121 degrees.

I suspect there's either no heatsink or a poor one mounted on the DSP IC inside and that's likely a big contributing factor as well. I haven't opened my unit up yet but likely will soon to confirm this when I do something else unrelated.

The H701 ran pretty cool and also allowed subwoofer control from a connected Ai-Net head unit instead of requiring the RUX controller to be used, which disappointed me greatly when I discovered that.

The PXA-H701 was very reliable and worked great despite somewhat more limited than the PXA-H800.

However, the H800 has firmware bugs I've seen occur a number of times. This as well as some other flaws have affected my opinion of it fairly significantly although it does sound good and I still enjoy using it.
 
#3,071 ·
Agreed. For kicks I swapped in a pxa-h701 brain and its integration, and control, with the ina-w910 is much better, seamless too. With the rux the additional optical ports could be selected.. however this was not the case with the h800. All additional inputs on the h800 are no longer accessable when used with an ainet head unit (unless they are ainet devices.) To plug my cell phone in I had to use a 3.5mm to rca patch cable. And it is low voltage, the noise floor is appalling as well. When using the h800 and rux as a stand alone.. it is much more versatile with input options.

I believe the h701 used butterworth on the even order slopes and I am not sure on the odd order slopes. Alpine used to post this information with their products owners manual. They do not list it anywhere with the h800, I even emailed and called alpine tech support several months ago and never got a response from them. .... I recently experimented with a friends iPad mini, it has a digital optical output and with the correct upgrades even properly decodes Dolby, and other 5.1 surround recordings. With an FM radio app.. it worked well as the single source into the h800, and h701... it was very impressive! For now I will stay with alpine double din control primarily because of the CD changer and ability to control and feed it optically into the dsp.. I too have noticed the firmware quirks and bugs. About once a month it requires a restart to get it to act right. This is a currently sold and supported unit from Alpine and I cannot believe they have not issued a firmware update in 5 years or more as this is a known problem. I wonder if using the UK website firmware on a north American market brain is the cause of it? I bought mine used and did not receive the setup disks for firmware changes and had to download them.
 
#3,072 ·
I have subwoofer level control from the ina-w910 without use of the rux, when used with a cda-9887 I did not have subwoofer level control without the rux. (Talking about the h800) had sub level control with all ainet units and the 700, 701. I would be hard pressed to say the 700 or 701 are inferior.. sure they have limited analog input options, and no PC tuning options. Substantially less parametric eq.. but they do some things better than the h800 does. When I bought my 800 used 700 and 701 units were still very high priced. Now a brain and controller can be had for 400 or less and that is quite the bargain for what it is. I have contemplated selling the h800, yet know I will likely keep both as I have began to collect/hoard ainet stuff and I just cannot bring myself to part with it once i have it.
 
#3,073 ·
Hi Bill - ok thanks for that. I would be curious where you heard about the Butterworth detail, as I haven't gotten that level of detail yet I think.

Regarding the optical inputs:

1. You can use any CD head unit - I still have my old DVA-7996 and just unplugged the optical connection and have it plugged into my very nice Bose Bluetooth receiver.

I put the DVA in CD mode with the disc stopped. Works wonderfully!

2. I've also experimented doing the same as #1 but with Android devices with HDMI output and using an HDMI audio extractor with TOSLINK connection, for 5.1 sound.

It works great. I haven't worked out the Android device (tablet, likely) installation details yet but I'm very close.

The sound, in principle, should be bit-perfect all the way back to the PXA-H800 in that case. Bluetooth currently sounds excellent, but the protocol does require altering the audio, unfortunatetly.
 
#3,074 ·
Hello TryDoing,

thanks, we know the KCA-410c. We have 2 KCA-400c on spare...
But this is not the problem. And not the solution...
We need one AUX INPUT (why, is a very loooong story...)
So... the one and only question is:
How can we additionally use one (or more) of the 3 AUX INs?
That is absolutely necessary!

The install manual IM_PXA-H800, Page 16 says:

"If connecting DVA-5210, connect it between the unit and the head unit using an additional Ai-NET extension cable. In this case, also connect the audio output jacks (L=white/R=red) of DVA-5210 to the AUX INPUT CH-1 (L)/CH-2 (R) jacks of the unit."

...so these inputs are usable with a Ai-HU...!?!?

And no, we have no DVA-5210 ;-)
But the install manual say it. So there is somehow a way to use???

TryDoingSomethingNew said:
However, as the PXA-H800 has the AUX capability built-in, it would make sense logically that we should be able to switch the PXA-H800 AUX input sources from the Ai-Net head unit.
Click to expand...
we see it exactly like that! (...or from the RUX)
but we have no idea how :confused:
After a long time searching... we think... we need a Firmware Mod or so :surprised:

greetz!
 
#3,075 ·
If you are using a CD changer you could use a kca-801b. This would give you additional inputs.. I did not notice what head unit you are using. Many of them turn the rca outputs into additional inputs when you switch to eq/ div mode for ainet.. some do and some do not.
 
#3,076 ·
NeedfulThink said:
Hello all!

I connected my H800 (incl. RUX) via AI from HU (IVA D800R at EQ-Mode).
How can I additionally use one of the 3 AuxIns?
Is it possible somehow??
This is E X T R E M E L Y important for us!

many thanks!
Click to expand...

Please tell me exactly what you are wanting to input and the rest of your system and perhaps I can better suggest options. CD changer, ipod, dab, TV tuner... everything in your preamp section and then we can see what your options are.. your deck should have a set of rca inputs for an audio video input. You should also have the CD changer optical and ainet port on the h800. The kca-801b is an easy option to add an input if you are limited. Or as others have said the 410 or 400 multi changer hubs... curious if you would be interested in selling one of the multi changer hubs?
 
#3,077 · (Edited)
hello BillC,

thanks, but sorry...
the one and only question is:
How can we additionally use one (or more) of the 3 AUX INs at EQ-Mode?
Plz, no other options... like KCA aso...

Thx!

b.t.w. ...
BillC said:
Many of them turn the rca outputs into additional inputs when you switch to eq/ div mode for ainet..
Click to expand...
...this is little wrong!
the turned rca outputs into "additional inputs", after switch to eq/ div mode, goes DIRECTLY to the HU-Amps!
You NOT can use it like AUXxx input.

So you can use a PXA without external Amp :)
 
#3,079 ·
NeedfulThink said:
Hello TryDoing,
thanks, we know the KCA-410c. We have 2 KCA-400c on spare...
But this is not the problem. And not the solution...
We need one AUX INPUT (why, is a very loooong story...)
So... the one and only question is:
How can we additionally use one (or more) of the 3 AUX INs?
Click to expand...
Hello, you're not paying attention to what Bill and I are saying.

a) The KCA-410c is not the same as the KCA-400c.

b) The KCA-410c or using a CD changer adapter (as Bill mentioned) IS the solution

The KCA-410c is an AUX input adapter which provides 2 AUX inputs.

How can we additionally use one (or more) of the 3 AUX INs at EQ-Mode?

In aftermarket stereo mode (no Ai-Net) you can access the AUX inputs using the RUX controller. However, this function is not accessible when using an Ai-Net head unit.

Therefore the only other way is to disconnect the Ai-Net cable and use the RUX for volume and source input selection, including the AUX inputs.

It you're capable of modifying electronics & wiring, it is also possible to modify the Ai-Net cable and use the stereo analog channels (wired to female RCA jacks) which will allow bypassing the head unit's analog signal and effectively creating an AUX input.

However I probably wouldn't recommend that, given that other options exist.
 
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