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Discussion Starter #1
For the past 6 months I have been streaming bluetooth from my Samsung phone to my Dayton dsp. As I continue to try to get my system dialed in, I think the sound could be better. When I had the system installed I had them run a 3.5mm to rca cable so I could also try wired connection. But I bought a cheapo cable off ebay and it produces a slight alt whine that is super annoying. The whine isn't present when streaming bluetooth. So is an upgraded cable the solution? Shielded, double shielded, ofc, ofhc? Audioquest evergreen is $72. Blue jeans is $62. Any others I should look at?
Also is it possible I just have a bad cable path? I'd hate to spend the money on a cable and get the same alt whine.

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I would recommend trying one of the Amazon Basics or Monoprice cables first as a "low- cost" solution to eliminate the possibility that you may simply have a bad cable.

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The typical Monoprice cables are coax so I wonder if that would make it resistant enough to noise? I ordered two the other day to use my Fiio in the house and truck. I agree, Bluetooth audio generally sucks compared to a good solid wired connection.
 

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Do you get alternator whine only while phone is charging or does it not matter? I'd suspect the noise is mostly from ground loop introduced by the charger.
 

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For the past 6 months I have been streaming bluetooth from my Samsung phone to my Dayton dsp. As I continue to try to get my system dialed in, I think the sound could be better. When I had the system installed I had them run a 3.5mm to rca cable so I could also try wired connection. But I bought a cheapo cable off ebay and it produces a slight alt whine that is super annoying. The whine isn't present when streaming bluetooth. So is an upgraded cable the solution? Shielded, double shielded, ofc, ofhc? Audioquest evergreen is $72. Blue jeans is $62. Any others I should look at?
Also is it possible I just have a bad cable path? I'd hate to spend the money on a cable and get the same alt whine.

Sent from my SM-G975U using Tapatalk
The proximity of a cable to sources where it would pick up alt whine is the first thing to look at. Even a great, well shielded cable could pick up noise depending on how it's run... I would look at that first.
 

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Discussion Starter #9
Do you get alternator whine only while phone is charging or does it not matter? I'd suspect the noise is mostly from ground loop introduced by the charger.
I'm such a noob. I was only getting the alternator whine when the phone was charging. Thanks for the tip. Maybe I'll still upgrade the cable next time I plan on having the car apart.

So what I've really been trying to accomplish is make sure I have a quality connection for this new addition I picked up on black Friday sale. IFI Nano iDSD black label. I have a premium tidal subscription and I stream pretty much 100% of my music in the car. With this DAC I can take full advantage of the MQA recordings. Samsung phone to DAC to DSP. I have to admit I had some buyer's remorse while I waited for it to arrive, thinking how good could it really be. After a couple of days of listening I am blown away. The soundstage really opened up. Not just wide but depth as well. And the MQA tracks are impressive. I should probably do a separate review on it. For now I'll say it was worth every penny.


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Always more than what I like to pay but I have not been let down by iFi yet. Good products. Also +1 for the Blue Jeans MSA-1 Cable.
 

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Interested in the DAC application.

My 2009 doesn’t stream and with an upgraded sound system I was looking for the best wired connection available for playing lossless files. Options are an old iPhone 3 used as a dedicated iPod but it has limited memory, especially with Apple lossless files. It sounds the same as the Y-Cable connection for my iPhone 11 Pro that can hold my entire library. I am also testing a USB stick to play WAV files. I haven’t been satisfied with that so far but plan on more testing.

The one that stands out as the best sounding source is when I use my Oppo HA-2SE Portable Headphone Amplifier and DAC. It supports iPhone and Android. I connect my iPhone to the DAC with the lightning to USB cable than connect the 3.5 mm stereo line out to the cars 3.5 mm AUX input. I just bought a 3ft Monoprice 3.5mm Flat TRS Audio Patch Cable that makes it very easy to close the center console cover with the cable connected to the console located AUX input. I have a few Blue Jeans MSA-1 cables for other applications. Unfortunately, Oppo got out of the home audio business. I really like their products.

https://www.oppodigital.com/headphone-amplifier-ha-2SE/

I’m surprised by the improvement in sound going through the DAC, I really didn’t expect it. The problem is I lose the CIC integration including steering wheel control and album art. OK if I am happy to just play albums or play lists without skipping songs since with the DAC I need to use the iPhone to make changes.

I am planning a system for my X6 and again want the ideal connection for the highest resolution playback.
 
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