[Dan750iL]

Why it was so easy to miss the spelling errors:

 

[winkychevelle]

Why it was so easy to miss the spelling errors:
View attachment 401686

This may be true, but there is no excuse for poor Grammer and spelling. Everyone makes mistakes sure, and it's nothing to harp on, but if someone starts texting me like this paragraph they are getting put on ignore.

 

[Austin_Jim]

Agree, but I'll need to ditch the images or spend time getting rid is the white background of each image from where I snipped them from the net. Didn't have enough time.

I did that on mine. It was tedious, but I think the gray background looks better:

 

[ItsonlyaHONDA]

On your first diagram, I kind of liked that you called the Morel MW9 midbass drivers "Bastards" in Español.

("Cabron" instead of "Carbon")

Good luck at the comp.

 

[Bret]

How did you do that diagram? What software?

 

[BobTheBirdTurd]

How did you do that diagram? What software?
[/YouTube.

Used Snagit to grab the screen snips and Visio to do the design.

 

[Bret]

Very cool. Professional. Thanks.

 

[BobTheBirdTurd]

On an effort to eliminate some mechanical noise, I replaced my NavTV Zen A2B with a Mobridge A2B. It didn't 100% eliminate the noise. But remove 85% of it with default settings. I reduced the stereo gain 1.7db and it's almost completely silent now on digital input and better on main input. I also gained about 2db output vs the NavTV.

I also started running a new coax cable for a direct digital connection via a Topping D10 to the DSP. This will be used for comps and demos.

I had to make a new mount for the Mobridge.

Then got it installed where the NavTV was. I still need to tie up the molex connectors and secure the TOSLINK better, but other than that it's in.

 

[saltyone]

The lengths we go…

Looks like you solved your issue. Congrats! 😊

 

[BobTheBirdTurd]

The lengths we go…

Looks like you solved your issue. Congrats! 😊

View attachment 404098

View attachment 404099

Not really, I switched from digital volume to main and it's still there. I don't know what the hell the issue is. I'll just use digital volume. What weird, the main volume is substantially louder than it was. I mean like ALOT!

 

[saltyone]

Not really, I switched from digital volume to main and it's still there. I don't know what the hell the issue is. I'll just use digital volume. What weird, the main volume is substantially louder than it was. I mean like ALOT!

Have you spoken with Jeffrey about it? Surely, it’s something he’s seen. I use main volume with digital volume maxed out. My digital volume doesn’t seem to do much, truth be told. I just leave it maxed out…no issues. Of course, I’m Dodge vs. Ford. They seem like two entirely different worlds from a signal perspective.

 

[BobTheBirdTurd]

Have you spoken with Jeffrey about it? Surely, it’s something he’s seen. I use main volume with digital volume maxed out. My digital volume doesn’t seem to do much, truth be told. I just leave it maxed out…no issues. Of course, I’m Dodge vs. Ford. They seem like two entirely different worlds from a signal perspective.

If I keep main volume maxed out and switch source to digital, I was able to mostly get rid of it. It's still there if I put my ear to the speaker, but it's very faint. If I'm on digital input, it will adjust using the digital volume. I'm not sure where or if I can adjust the main output and leave the digital where it's output is now. I have a good work around and the Mobridge is an improvement on output, it just didn't fix my issue.

 

[JPIG]

If I keep main volume maxed out and switch source to digital, I was able to mostly get rid of it. It's still there if I put my ear to the speaker, but it's very faint. If I'm on digital input, it will adjust using the digital volume. I'm not sure where or if I can adjust the main output and leave the digital where it's output is now. I have a good work around and the Mobridge is an improvement on output, it just didn't fix my issue.

You should be able to tell the director to adjust master volume rather than digital input. It definitely sounds like your HU is sending in attenuated signal. I’ve just started diving into the digital realm so someone correct me if needed, but from what I understand digital volume control actually changes the data that is being sent, bits are dropped to create a quieter output. It’s not like analog where more or less voltage changes the vol. If the HU is quieter, it’s because it’s altering the data to the DSP. When you connect your computer to the dsp it’s sending an unmolested data stream so it’s louder. With that I’m mind I’d say you want the HU at 100% all the time to get the best sound.

I’d set the director to adjust master vol, put the HU vol on 100%, adjust dsp digital input to get the best signal possible without clipping or noise, adjust channel/master vol while using Oscope on your amp inputs(dsp outs) to get a good wave with no clip. Once you have that you can set amp gains to get final volume.

 

[BobTheBirdTurd]

You should be able to tell the director to adjust master volume rather than digital input. It definitely sounds like your HU is sending in attenuated signal. I’ve just started diving into the digital realm so someone correct me if needed, but from what I understand digital volume control actually changes the data that is being sent, bits are dropped to create a quieter output. It’s not like analog where more or less voltage changes the vol. If the HU is quieter, it’s because it’s altering the data to the DSP. When you connect your computer to the dsp it’s sending an unmolested data stream so it’s louder. With that I’m mind I’d say you want the HU at 100% all the time to get the best sound.

I’d set the director to adjust master vol, put the HU vol on 100%, adjust dsp digital input to get the best signal possible without clipping or noise, adjust channel/master vol while using Oscope on your amp inputs(dsp outs) to get a good wave with no clip. Once you have that you can set amp gains to get final volume.

Amps are set for Direct DSP, gains are bypassed and controlled by the Helix. DSP was configured by a pro, that includes gains structure during the config. He set everything by ear. My issue is the factory HU is introducing noise and I don't know why.

 

[JPIG]

Amps are set for Direct DSP, gains are bypassed and controlled by the Helix. DSP was configured by a pro, that includes gains structure during the config. He set everything by ear. My issue is the factory HU is introducing noise and I don't know why.

I thought you said when Jeffrey tuned it he plugged direct to the dsp and bypassed the HU? Either way I’d think the HU @ 100% would be the way to go, especially with the issue you’re having.

I have no idea how Dir DSP works but my 4/10 gains are at zero on tweeters and mids. I’m curious how the amp knows where it should be with ddsp. If it’s measuring and matching your input voltage I feel like that could bite you if you had signal issues upstream from there. Just because it’s so easy to do, I’d switch it off with gains all the way down to see if anything changes. The symptom is noise, but that may not be the problem. All signals will have noise. But if the good part of the signal(music) is not loud enough, you’ll have to boost down stream which will amplify the noise when there’s no music to cover it up.

Note- don’t take any of this as arguemtuive. I’m a serial troubleshooter and my mind has been on digital to analog gain structure for the last 3 months while I upgraded my and my wife’s setups.

 

[BobTheBirdTurd]

I thought you said when Jeffrey tuned it he plugged direct to the dsp and bypassed the HU? Either way I’d think the HU @ 100% would be the way to go, especially with the issue you’re having.

I have no idea how Dir DSP works but my 4/10 gains are at zero on tweeters and mids. I’m curious how the amp knows where it should be with ddsp. If it’s measuring and matching your input voltage I feel like that could bite you if you had signal issues upstream from there. Just because it’s so easy to do, I’d switch it off with gains all the way down to see if anything changes.

Note- don’t take any of this as arguemtuive. I’m a serial troubleshooter and my mind has been on digital to analog gain structure for the last 3 months while I upgraded my and my wife’s setups.

I believe it outputs a specific voltage depending on the channel selection in the DSP. It's not a gain issue, the system is dead silent from the DSP on. You adjust gain via the DSP which has clipping indicators on the channels. My issue isn't clipping, something is just introducing noise into the right channel and it's north of the Mobridge. The only thing north is the factory HU and factory wiring. It's not an alternator wine or a ground loop, sound is present vehicle running or not, and is only present when I go through the HU.

With digital input selected in the DSP, I was able to mostly eliminate it. With input set to "Main", output is greater and therefor the sound is more pronounce. I don't fully understand the difference, they are both set the same. Whether I adjust volume with Main or Digital, it still adjusting a digital signal. I don't use Analog in. My solution is going to be adjust some of the channel gaines and reduce it the best I can, and then use a DAP when it matters.

When Jeffrey tuned, he connected directly to the DSP they way I did today with a laptop. Bypassing the factory HU and NavTV. Connected that way, the system is dead silent, no hiss, wine, pops, nothing. Being that the HU connects digital, it shouldn't be picking up the noise

 

[mobridge]

Amps are set for Direct DSP, gains are bypassed and controlled by the Helix. DSP was configured by a pro, that includes gains structure during the config. He set everything by ear. My issue is the factory HU is introducing noise and I don't know why.

We actually can trouble shoot this noise further, we have a pretty advanced debug menu in our unit for this exact reason. Shoot me an email and we can figure out a time to take a look.

 

[JPIG]

I believe it outputs a specific voltage depending on the channel selection in the DSP. It's not a gain issue, the system is dead silent from the DSP on. You adjust gain via the DSP which has clipping indicators on the channels. My issue isn't clipping, something is just introducing noise into the right channel and it's north of the Mobridge. The only thing north is the factory HU and factory wiring. It's not an alternator wine or a ground loop, sound is present vehicle running or not, and is only present when I go through the HU.

With digital input selected in the DSP, I was able to mostly eliminate it. With input set to "Main", output is greater and therefor the sound is more pronounce. I don't fully understand the difference, they are both set the same. Whether I adjust volume with Main or Digital, it still adjusting a digital signal. I don't use Analog in. My solution is going to be adjust some of the channel gaines and reduce it the best I can, and then use a DAP when it matters.

When Jeffrey tuned, he connected directly to the DSP they way I did today with a laptop. Bypassing the factory HU and NavTV. Connected that way, the system is dead silent, no hiss, wine, pops, nothing. Being that the HU connects digital, it shouldn't be picking up the noise

But if he didn’t tune it from the HU that source level was not part of the tune and the source is where the issue seems to be. I’m not saying it’s a gain issue at heart. But IF it’s a noise/noise floor issue from the HU, your downstream gain setup could make it terrible, or it could make it not noticeable at all.

You said you’re surprised at how much louder the direct coax is than the HU. That alone would tell me I need more HU volume, even if it’s not related to the noise. I’d be willing to bet @mobridge will be able to shed some light on it. Keep digging, you’ve put too much work into that thing to have to pull out different source to compete!

 

[BobTheBirdTurd]

But if he didn’t tune it from the HU that source level was not part of the tune and the source is where the issue seems to be. I’m not saying it’s a gain issue at heart. But IF it’s a noise/noise floor issue from the HU, your downstream gain setup could make it terrible, or it could make it not noticeable at all.

You said you’re surprised at how much louder the direct coax is than the HU. That alone would tell me I need more HU volume, even if it’s not related to the noise. I’d be willing to bet @mobridge will be able to shed some light on it. Keep digging, you’ve put too much work into that thing to have to pull out different source to compete!

I get what your saying, I have another thread about this specific issue that has all of my troubleshooting steps done. Gain was rhe second thing I looked at, I had to reduce the gains to -12db to eliminate the noise. While present in the left channel, the issue is substantially worse in the right channel. It's nonexistent in the left unless I boost the left as high as it will go. Even then, it's very faint.

I am going to mess with the Mobridge some more, it is definitely louder that when I had the NavTV in, especially when I have Main selected as the input. Also, incase you are unaware, the HU connect to the Mobridge via CAN bus, which is a digital signal.

 

[JPIG]

When you said the noise increases with volume I assumed you were controlling vol with the director, is that correct? Does the noise increase with HU vol or stay the same?