Distortion on RCA out - MTCD Android Head Units General

Hi,
I know the MTCE are not known for their sound quality but anybody have distortion on RCA level out? Even set the gain at the amplifier to minimum I get distortion when the volume slider goes higher than 20.
Why is that? I also feel like frequency response sucks on the RCA.
Is speaker level better from your experience?
Will a line driver help in this case?
Thank you for your time!
Laurent

Maybe your rca s are like mine and have a groundloop.
If your amp has highlevel input, id try using them

Had the same issue. Went with a AudioSource Matrix Line driver that definitely helped a lot in Sound Quality. Not where I wanted, after the line driver there was still a little noise so I got noise filters and gone (ground loop isolators are the same thing). Noise was gone but sound was not there completely. So I went with a JBL DSP. night and day. So clean coming from a crappy Android Unit. lol. I dont care what anyone says. these android units are the best way to go. Just need to beef them up at the outputs to get them sounding amazing.

What do you mean by a "JBL DSP"? Is it a JBL Amp with DSP capabilities or just a straight DSP? Are you still using the RCA line-level outputs or did you end up using the speaker-level outputs?
Thanks.

jtrosky said:
What do you mean by a "JBL DSP"? Is it a JBL Amp with DSP capabilities or just a straight DSP? Are you still using the RCA line-level outputs or did you end up using the speaker-level outputs?
Thanks.
Click to expand...
Click to collapse
Stand alone DSP.. I went with Audio Control Matrix to JBL Stand alone DSP. I used the RCA's but some noise filter on my single input to the line driver and then used the line driver to convert the signal since my line driver is also an EQ.. One (front) input and pushes my three outputs (Front, Rear and Sub). Sounds great but I recommend doing all three inputs and outputs. It boosts sound quality. I am waiting another set of interconnects to change from single input to three inputs.

Ok, thanks for the clarification. I gave up completely on my Eonon-branded Android 8 MTCE unit. Between the noise-related issues and the overall sound quality, I just wasn't happy with it. The WinCE unit I was coming from (Dynavin N7) just sounds *considerably* better, even when using the same external Kicker auto-tuning DSP amp and all of the same wiring in the car. So I've re-installed the WinCE unit and will use the Eonon for another project (creating a portable wooden "boombox" with the Eonon as the main "control center" and some component speakers I had laying around. Should make a nice portable do-it-all, touchscreen Android "media center".
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I use these headphones everyday for literally every audio purpose in my house, which includes my phone (HTC One), my console (PS3), and laptop. They are bid enough to give you all the bass you could want, and they are still light enough not to be an issue while moving around during my adventures. The cord is lightweight and also includes a mic on it that works for my phone and laptop. I've tried Bose and Beats By Dre and didn't notice anything that would make me want to spend an extra $200. This is the best bang for the buck for me for this style of headphones.I haven't had them long enough to know how long they will last but one thing I noticed was my old set broke because the wire got pulled from the speaker somehow. These speakers have a cord that can disconnect so they won't break. And if that wasn't enough to convince you how much I love these headphones I will get you 10 more reason.
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How do they stack up to other over-the-ear type headphones?
Sent from my HTCONE using Tapatalk

Review of Anker Bluetooth stereo headset w/lots of pics!!!

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anker
i also bought one
but to be honest, it doesn't work very well with my samsung
maybe not a great choice for me

Best Bluetooth to Aux Adapter

We have lost our Bluetooth to aux adapter we had in my wife's car. it was this model, but it seems like they have a newer one out now. https://www.amazon.com/dp/B004KPLS7K/ref=olp_product_details?_encoding=UTF8&me=
Anyone else have one they prefer?
me and two of my friends use this one: https://www.amazon.com/Mpow-Bluetooth-Receiver-Streaming-Hands-free/dp/B008AGQMQC/
Well, they have this one since I had the older one that's discontinued. That metal aux part comes out btw so you can run a regular cable.
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Thanks and I am glad you mentioned that. I saw that one but didnt want it because I didnt want that bulky thing sticking out of my aux LOL. I was quite set on aptx but i am reading some reviews and it seems like it really doesnt add much especially for stock car speakers. The fact that this is bluetooth 4.1 makes it attractive. Many are 4.0
I've been very happy with this one, and it supports Aptx:
iClever Himbox Bluetooth Hands-Free Car Kit with Clip, AptX, Multi-Point Access,3-Port USB Charger https://www.amazon.com/dp/B011NR0BY8
Now that i think of it, my previous one didnt have a battery and had to be plugged in. Sounds like a negative but it was great because you didnt have to turn it on and off. I think i am going to stick with one that has to be plugged in and turns on automatically.
Im looking at these right now:
https://www.amazon.com/gp/product/B0739RGDFJ/ref=ask_ql_qh_dp_hza#Ask
https://www.amazon.com/Brightech-Br...Connectivity-Simultaneously/dp/B00NP9SJ56#Ask
https://www.amazon.com/gp/product/B00RH29CJO?tag=ttr_bluetooth_car_kit-20
https://www.amazon.com/BK01-Bluetoo...r2-20&linkId=66bf6910a0d2d139fc2f8330ed93cc1f
dberthia said:
I've been very happy with this one, and it supports Aptx:
iClever Himbox Bluetooth Hands-Free Car Kit with Clip, AptX, Multi-Point Access,3-Port USB Charger https://www.amazon.com/dp/B011NR0BY8
Click to expand...
Click to collapse
thanks! adding this to my list. This is on the pricier end of what i am looking at but also checks all the boxes including aptx.
FYI, I also had to buy a ground loop noise isolator with that Himbox, since I was getting some interference noise.
Mpow Ground Loop Noise Isolator for Car Audio / Home Stereo System with 3.5mm Audio Cable (Black) https://www.amazon.com/dp/B019393MV2
JewRican said:
Thanks and I am glad you mentioned that. I saw that one but didnt want it because I didnt want that bulky thing sticking out of my aux LOL. I was quite set on aptx but i am reading some reviews and it seems like it really doesnt add much especially for stock car speakers. The fact that this is bluetooth 4.1 makes it attractive. Many are 4.0
Click to expand...
Click to collapse
I also bought a super flat and thin aux cable so I could reduce the footprint.

FM Tuner question

I recently purchased a Hizpo Android headunit with 9.0 it has 4gb of RAM and 64 internal storage. Anyway my question is, I noticed that the mp3's audio seems to sound alot better than just the FM Tuner. The FM audio sounds really weak. Is there any adjustments I can make to the settings or is that just the way it is. I have a 10 inch kicker Sub that is self amplified and sounds good on the mp3's but on the Tuner it is almost non existent. I don't have the external remote gain for the Sub, but is that what I need to get the sound closer to where the mp3's sound? The unit is installed in a 2007 Ford supercrew cab truck.
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Sent from my SM-A705MN using Tapatalk
Sometimes you need a signal booster like this and blue wire needs a 12v+
with-style said:
Sometimes you need a signal booster like this and blue wire needs a 12v+
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Hi,
I have looked on amazon.ca and wasn't sure which of the several units were what you were recommending.
There was a Mr Ho product with many positive reviews. here is a link;
https://www.amazon.ca/Mr-Ho-Antenna...ar+radio+signal+booster&qid=1605705299&sr=8-9
Can you share details on the product you recommended ?
Perhaps a web link or product name etc.
Thanks From Nova Scotia,
I've seen this.
with-style said:
Sometimes you need a signal booster like this and blue wire needs a 12v+
Click to expand...
Click to collapse
I used to have a cheap unit that I got from Ebay. It worked well enough to watch live TV through using PDA net. Great for long drives. My boss and I watched a Monday night game when we had to make a five hour drive. Be careful though. My TV service was noticeably lower than the MP3 volume and equalizer effect. I had to get a get an app to fix the issue. This was on an Android 4.2 and it was five years ago. I do know that they have apk's that balance the sound. Another option is to look at the code. Its not too difficult to figure out. This morning I found the one on my phone that sets the Bluetooth volume way low when it is channeled through a speaker. It was in the ".etc" file. Coders usually do a fair job at labeling each section. It was easy to see that the headphone, call, and hearing aid were all set with maximum values of 4800 with steps for each volume reference at double the speaker that was set at 2800. Careful with this though. If you're driving the sound through an amplifier, as I think you are and should with 10" subs, then you stand a chance of burning up the amp and/or blowing the speakers if you put too much out from the head unit pre-amp. Its better to adjust the MP3 down rather than the FM up.

Mitsubishi Lancer Dasaita HCT-PX30 (Rockchip RK3326) [RCA/LINE & SUB Outputs Not Working]

Hi,
I tried to connect my sub-woofer amp to my Dasaita headunit but the RCA/LINE outputs (which are labelled in english "FRONT L OUT" and "FRONT R OUT") have extremely weak signals. I also tried using the SUB wire (which is a green female RCA connector) but it was exactly the same and was too weak.
I then checked these output connectors by connecting my oscilloscope and having a look what was going on, and they were only at ~300mV which is ridiculously low.
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Why are they so weak and how can I increase them. Is there a setting in the Android menu I can change perhaps or is there a hardware modification I can do on the circuit board? Maybe I need a DSP module. I literally have no idea at this stage but any help or advice would be appreciated as I've done an intense Google search and I have only found several topics from users who have the same problem, but there is no solution.
The only next real idea I have would be for me to splice into the front left and front right speakers, but I really don't want to go splicing wires and then have to deal with the sub then 'popping' everytime I go to start the car. I'd rather have the headunit drive the outputs correctly.
Thanks.
Bump.
Crystal ball is blank. We could enter a guessing game
Post detailed info about head unit after contacting seller support
I tried contacting support but I cannot get a response from them.
What I've done in the meantime is drive my sub gain up to max and remove my high level line converter. I get a little more bass now, but it's still a bit weak. I cannot control it in the amplifier application either (dragging the slider does nothing even if I had it connected to the green [SUB] wire output) so I have to use the sound balance option instead and move the audio more towards the rear speakers to get more bass because I'm using the [REAR L OUT] and [REAR R OUT] connections. The lack of [SUB] out controlability might be a ROM (firmware) problem, but I don't want to go experimenting and changing ROM versions because I'll lose all my settings and data. As for the weak [REAR L OUT] and [REAR R OUT] voltages, that would most likely be a hardware problem (I do see 10K pulldown resistors in the schematics which might need to be lowered to a lower value).

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