I tried alot with the unit, now It works fine with an alternate firmware (Mal*y*k) on Android 5.1.1, so this issue is solved for me.
Statistics: Posted by Sebbel — Sun Jul 31, 2016 3:41 pm
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but I am so sorry to tell you that 4.4 Android can't be updated directly to 5.1 Android because of the machine firmware' limitation.
That means the unit with 5.1 Android system has its firmware programming into the unit without being able to change, which has the same firmware limitation with some other 4.4 or 4.4.4 Android unit. Our technician and factory professional man have test so many times , and they found the limitation of firmware would be disordered and caused lots of problem to the unit when updating the 4.4 unit to 5.1.
So, to avoid any unnecessary problem to our respected customers,we won't suggest you to update the unit from 4.4 to 5.1.
Regards
Statistics: Posted by Jammy — Tue Jul 26, 2016 9:15 am
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Sadly, I installed an older Android 4.4.4 to my device - can you tell me a download-link to an Android 5.1.1 for the RK3188 MTCC 1024x600? - Thank you.
EDIT: Forget the idea about diodes, it has only been a placebo for me.
Statistics: Posted by Sebbel — Sun Jul 24, 2016 8:02 pm
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Regards
Statistics: Posted by Jammy — Tue Jul 12, 2016 6:47 am
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thank you for this information, I will disconnect the red cable.
But please tell me, how to disable the Subwoofer-Output. Currently, now low frequencies are getting through the 4 Cinch-Cables, because the unit still splits them.
EDIT: One idea to disable it, is to lower the crossover-frequency to 0 Hz. I only need a ability to change the crossover-frequency.
This is a big disadvantage of the Pumpkin-System. On the most radios with a connection to an external subwoofer, you can adjust the crossofer-freq. like 50Hz, 80Hz, 100Hz - depending of your mid/high-speakers. Like the common 5.1-soundsystems for your homecinemasystems. If you have big speakers (with a bass-unit), you can lower the subwoofer to 50Hz. If you have this tweeting-speakers (small!), you need to increase it ti 80 or 100Hz, because they can't play the lower frequencies.
EDIT2: A short google-search linked me to this Thread: .
Please tell me, that this won't also counts for mine. 
Regards,
Sebastian
Statistics: Posted by Sebbel — Tue Jul 12, 2016 4:19 am
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After discussing your issue with our technician, he said that the subwoofer output RCA cable is used for connecting the external subwoofer device. but cause your car bose soundsystem does not have the SUB/SWR input, so you don't need to use the subwoofer output from our RCA cable, just like your previous Pioneer unit disable the subwoofer output, hope your understanding.
Please notice, you need to follow the below attached picture to disconnect the red little connectors. They have special use on other place for the factory. If you connect them, the unit will drain your car battery.
Regards
Statistics: Posted by Jammy — Tue Jul 12, 2016 3:30 am
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The A3 8P (2003-2011) has the right (40-pin)-connector and for the speaker, you'll need to take a view onto Tables B and C.
The description for "subwoofer" is completely missing, because you can't connect to it directly.
Regards,
Sebastian
Statistics: Posted by Sebbel — Mon Jul 11, 2016 9:43 pm
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There is no option to connect the SUB-out to the Bose-System! Please tell me, how to disable the subwoofer-output to gain the full HiFi-Range to the Cinch-Connectors. Currently, the Pumpkin splits the frequencies to low and high and the low frequs are getting to the sub-out, that is wrong.
I also checked the Link: , but that is a complete other system/plug (Audi A4?). It looks like the ISO-Connectors, but I have QUADLOCK on my Audi A3.
On this picture, you can see the previous Pioneer Unit, where the subwoofer-output has been disabled:
Here, you can see the Cinch-connection between my Pumpkin-Amp and the Quadlock-Connector:
And this is a direct Image to the connector:
And at last, the Pumpkin-Connector:
Regards,
Sebastian
Statistics: Posted by Sebbel — Mon Jul 11, 2016 4:29 pm
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Could you please send us the wiring diagram of your original radio?
We need this information to check and try to give you solution.
Regards
Statistics: Posted by Jammy — Mon Jul 11, 2016 8:42 am
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I'll check the link, but the rearspeakers worked I think - I'll check it again, but the worst nightmare is the subwoofer that isn't working. I urgently need to disable the subwoofer-output(/lowpassfilter) and to the full range sound to all 4 channels (otherwise, my BOSE-Amp won't lowpass to the subwoofer).
For the high-freq. noise, I think, I found a reason: the Baseunit needs to be grounded. If also the grounding won't work, there are also filters available, that will be connected between the cinch-connectors.
I already felt in love with this pumpkin-radio, but the sound got worse (have you ever heard electrical music, where everything below 100Hz has been cutted away?). :-/
Regards and thank you for support.
Statistics: Posted by Sebbel — Mon Jul 11, 2016 3:26 am
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For the engine noise, could you please take a video and upload it to youtube, then send the link to us?
We will help you check it.
For the subwoofer not working, please refer to the below forum to check.
viewtopic.php?f=13&t=277
Regards
Statistics: Posted by Jammy — Mon Jul 11, 2016 3:14 am
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two days ago, I installed my 11-RQ1221E (Android 5.1) and everything looked fine. But when listening to music, I have two serious issues:
- I can hear my engine highfrequently through the speakers (more revs -> higher beeping)
- my subwoofer isn't working anymore.
I would like to set a focus on the second problem. To connect the speakers, I need the Cinch-Cables (FL,FR,RL,RR), but the device seems to crossfade the sound to the subwoofer-output, that can't be connected to any cable, because Audi works with Bose, that uses an internal crossfader with his own frequency.
How can I disable the crossfade by the device itself? There must be a way to configure the DSP. I would do a telnet/ssh, if this would be possible, but I need to know, in what ini/cfg I need to change it.
Please don't answer with some <Equilizer-App>, because this also won't change the deviceconfiguration itself.
Regards,
Sebastian
Statistics: Posted by Sebbel — Sat Jul 09, 2016 12:23 pm
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