MekedeTech DUDU7 Android Head Unit Review

[Eulipian]

More or less. I bought a few but at the end, made a combo of the parts I bought and what came with the van. I guess we got kind of lucky in the way someone had already put an aftermarket Kenwood in there so we were able to use its trim piece.

I also bought the double dins and those did not work at all. The single DIN gave us more flexibility as we didn't have to worry about the depth of the unit.

It would be great if you could give a bullet point summary of what to think about, what to avoid, and any new curse words you learned for anyone thinking about attempting this at home, Amir.

 

[Dunlavyphile]

In DUDUOS 3.6E.

Can someone please explain what this changes from the earlier release? The 96Hz?

https://forum.dudu-auto.com/d/2206-duduos-36e-official-update-now-on-ota-duduos-37-preview

 

[Mikescotland]

In DUDUOS 3.6E.

Can someone please explain what this changes from the earlier release? The 96Hz?

View attachment 478865
https://forum.dudu-auto.com/d/2206-duduos-36e-official-update-now-on-ota-duduos-37-preview

What they did basically is to remove AKM dsp headroom for EQ etc in "pass through" mode. Nothing else. So output is closer to 0dBf when file is 0dBf. I have some doubts though about quality as with UAPP I almost swear I can hear some distortions (or clipping). I have no means of testing spdif out though (no gear). Maybe @amirm could retest this mode, please?
96kHz is still up sampling of 48kHz.

 

[msandman02]

@amirm or anyone i guess... if I plan on only really using android auto and streaming YouTube music from my phone(I don't have hotspot and I'm not getting a sim for the dudu) is this overkill for my needs?

 

[amirm]

I think so. If you just need those features, you can find them in any head unit.

 

[msandman02]

I think so. If you just need those features, you can find them in any head unit.

i figured. The only thing is if i want 9" or bigger screen from a name brand is gonna cost probably the same or more and be less responsive. Maybe ill look into an android auto/carplay only device

 

[Marv2525]

Got a question, so if im using coaxial spdif pass thru I should be able to turn the vol/signal all the way up to tune my dsp. You said there was some noise? Should the signal range be backed off a couple dbs?

 

[Dunlavyphile]

If you decide to buy one of these units check out Mekede Mall. They will give you a custom frame and harness to fit your vehicle, provide advice and updates throughout the order process and charge a good price relative to Amazon. Use WhatsApp to communicate with them directly. They've replied to all my messages immediately.

 

[Mark185]

If you decide to buy one of these units check out Mekede Mall. They will give you a custom frame and harness to fit your vehicle, provide advice and updates throughout the order process and charge a good price relative to Amazon. Use WhatsApp to communicate with them directly. They've replied to all my messages immediately.

That was my experience when I purchased my 2nd DUDU7 unit. First one bought on Amazon for my truck. 2nd one purchased on Mekede Mall for BMW 540i. Very positive experience dealing directly with Mekede.

 

[toat]

I'm measuring the voltage out of the RCAs only at 0.5v with a 0db 40hz and 1khz test tone. Any idea why my voltage is so low? I have default settings and DTS off. Dts on actually makes it go up to 0.8v

 

[Mark185]

I'm measuring the voltage out of the RCAs only at 0.5v with a 0db 40hz and 1khz test tone. Any idea why my voltage is so low? I have default settings and DTS off. Dts on actually makes it go up to 0.8v

Something is wrong unless there is a problem with your source signal. What are you using as source? I used test tracks ripped to flac files and played them with my preferred music player called Power Amp. I measured 3.9-5.0 volts RMS depending on frequency. It has been a while since I tested mine.

 

[toat]

Something is wrong unless there is a problem with your source signal. What are you using as source? I used test tracks ripped to flac files and played them with my preferred music player called Power Amp. I measured 3.9-5.0 volts RMS depending on frequency. It has been a while since I tested mine.

Hmm that's quite odd. I'm using the 0db test tones from audio dynamics. Tried with 40hz and 1khz. Maxing out volume at 36/36. Multimeter and oscilloscope both read at 0.5v. I'm playing the files through VLC

If I send digital to my minidsp, both the multimeter and oscilloscope read correctly at 4.6v. Because of that, I think my test tone and meters are correct

 

[Marv2525]

Different ways you play the music like (off radio, BT, or type c) will give you Different volume levels. I noticed when setting up my signal chain.

 

[Marv2525]

That's great no one replies to this crap

 

[Dumdum]

That's great no one replies to this crap

What reply did you want? You made a statement not asked a question

 

[Marv2525]

What reply did you want? You made a statement not asked a question

No this is a question

 

[Dumdum]

Got a question, so if im using coaxial spdif pass thru I should be able to turn the vol/signal all the way up to tune my dsp. You said there was some noise? Should the signal range be backed off a couple dbs?

Perhaps tag the ‘you’ next time you want an answer instead of just posting otherwise the person you are talking too won’t know you’re asking them

 

[Mark185]

Got a question, so if im using coaxial spdif pass thru I should be able to turn the vol/signal all the way up to tune my dsp. You said there was some noise? Should the signal range be backed off a couple dbs?

Don't know who said there was some noise. If you use DUDU7 volume control with digital signal out, you lose some bits of resolution as you turn volume down. In theory, this degrades the SNR. In practice, it is not very noticeable in normal listening conditions with normal background noise in a car. It is only important if you are very picky about nearly bit perfect signal transmission from head unit to amplifier or DSP. Android makes bit perfect impossible with how it upsamples audio signals unless you have software that bypasses the Android audio processing. There are a few Android music players that appear to have this capability. Power Amp is one if you buy some upgrades to the basic package.

Every DSP I am familiar with allows you to set input stage gain even with optical or coax SPDIF so I do not see any point in backing off digital signal range on the head unit for tuning your DSP. The thing you need to focus on is not driving the DSP output stages into clipping and this varies with the DSP design. Example - Dayton Audio DSP-408 will clip at ~1.6-1.8 volts output. A Helix DSP may not clip until signal exceeds 4-10 volts at output depending on model.

 

[Dumdum]

Don't know who said there was some noise. If you use DUDU7 volume control with digital signal out, you lose some bits of resolution as you turn volume down. In theory, this degrades the SNR. In practice, it is not very noticeable in normal listening conditions with normal background noise in a car. It is only important if you are very picky about bit perfect signal transmission from head unit to amplifier or DSP. Every DSP I am familiar with allows you to set input stage gain even with optical or coax SPDIF so I do not see any point in backing off signal range on the head unit. The thing you need to focus on is not driving the DSP output stages into clipping and this varies with the DSP design. Example - Dayton Audio DSP-408 will clip at ~1.6-1.8 volts output. A Helix DSP may not clip until signal exceeds 8-10 volts at output depending on model.

Audiotec Fischer is 8v in the top models pro 3, ultra, ultra S and the Brax Dsp as well

The mini mk2 and Dsp.3s are 6v and the Dsp amps are generally 3v output on the preouts

As long as the signal is full scale there is no need to adjust any gains on the input section of any Audiotec Fischer Dsp, just set the output accordingly and set gains on amps if used, job done

Tbh if a digital source gets noisy it’s not a very good digital source and I’d bin it off