04-18-2017, 06:59 AM | #1 |
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Low Volume Output from USB
I'm having a small issue, when I'm trying to listen to music from my iPhone 7 Plus via lightning port (well other than Bluetooth I don't have any other options so ) with Apple's cable, the volume is extremely low compared to radio. No EQ setting or sound limit on the phone. When I switch between the radio and the USB without touching the volume knob there is a huge gap, I need the volume at least %50 to get decent sound out of the phone. I can't touch the volume setting on the iPhone when connected with USB, I can see it's almost full. Once I revert back to FM radio it will blast my ears off with the same setting. I have the HK system. I took it to the service once, they said they applied an update but it wasn't a huge improvement. Any ideas?
Last edited by omera60; 04-19-2017 at 04:19 AM.. |
04-18-2017, 02:43 PM | #2 | |
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Also keep in mind that the output voltage from the Lightning port is very low, and the HU simply doesn't have the gain -- or purposefully limits the gain -- to equalize volume from it via USB.
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04-18-2017, 02:54 PM | #3 |
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One other thing to try perhaps, plug into the aux in port in the armrest and max the volume on your phone.
When I went from USB drive for music to aux in with FiiO the volume increased probably 50%. So USB I had car volume up to 75% now closer to 50%. Not going to fix the problem but maybe trouble shoot some.
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04-18-2017, 06:42 PM | #4 |
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I've noticed the same issue using a USB thumb drive loaded with music and the base radio. I do not have any suggestions, but will be following this thread to see if there's a solution.
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04-19-2017, 04:17 AM | #5 | ||
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Gents,
Thank you for your replies. To begin with; Quote:
Quote:
Last edited by omera60; 04-20-2017 at 04:28 AM.. |
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04-19-2017, 09:53 AM | #6 | |
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Basically, you can't use Aux In with your phone as a straight connection; you're stuck with the Lightning port and Bluetooth. I'm 90 percent sure the audio interface in iDrive does not have source volume leveling, but I'd check just in case. Otherwise ... it's probably something you'll have to live with if you continue to use your phone. Another solution is a standalone DMP. Check out the recent install that BEM-S4 did here. It's quite cost effective for MUCH higher quality source material than the car's OEM systems can deliver. Another solution is to buy a used iPhone or iPod Touch with a headphone jack/Bluetooth that you can use as a dedicated music device.
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04-19-2017, 02:40 PM | #7 |
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Your other option, if you don't care about charging the phone, is a USB DAC / headphone amp that should solve your problem (VM help me out if I am talking out of my ass). Audioengine makes one I believe, I know FiiO has a number of different options.
If volume is your only concern and you don't much care about improving the audio quality, you could also look for a bluetooth DAC that should help and will allow you to still charge your phone. But Viffermike is right he and I just went through the entire dog and pony show on all of this shit. If you want to charge phone and improve sound, the DMP is really your only option. Last edited by BEM-S4; 04-19-2017 at 02:46 PM.. |
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04-19-2017, 02:49 PM | #8 |
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Like this for instance you'd plug into the aux port in the armrest and charge it there as well. Your phone you would charge someplace else, either center cigarette lighter or add USB to glovebox.
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04-19-2017, 03:46 PM | #9 | |
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Two alternate suggestions that BEM-S4 touches upon: 1). Use the Lightning-to-USB adapter that came with your iPhone 7 to feed a small inline USB DAC such as the AudioQuest Dragonfly Black ($100) or the FiiO K1 ($40), which also has a small headphone amp built-in that will boost the signal going to the Aux In jack. That way you get a good DAC that bypasses the one in the iPhone, extra juice to make up for the weak USB output, a form factor that allows you to control music with the iPhone. What you wouldn't be able to do is charge the phone simultaneously (though there are Lightning 'splitters' out there that are dubious at best). 2). The just-released FiiO i1 ($40), which is specifically designed for the iPhone 7. It basically does the same thing as the other options above, but is not as high quality and universal in application and use. It basically gives you back your headphone jack, but with some added juice. Here's a review.
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04-19-2017, 03:58 PM | #10 | ||
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One thing we haven't really touched on is what you are using for source files. If you're looking to stream Pandora for example the BT option may be the path of least resistance and make no noticeable impact on sound quality while still allowing you to charge your phone and boost the volume. FLAC files you're opening up a whole other can of worms that's not easily solvable without a DMP as Viffermike pointed out.
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04-19-2017, 11:28 PM | #11 | |
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I don't stream music, I only listen to what I have on my music library on the iPhone. It's a mix of iTunes downloads and CD transfers which are done with Apple Lossless Recoder. I also use Google Maps for traffic info (as BMW RTTI doesn't have a wide coverage in Turkey) so I also need to hear the voice commands from it as well, will these products work with that as well? Last edited by omera60; 04-20-2017 at 02:40 AM.. |
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04-20-2017, 06:02 AM | #12 | |
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04-20-2017, 09:16 AM | #13 | |
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If I were in your situation, I'd probably get the AudioQuest. It's generally the highest-rated of all the small-form USB DACs, and it's great to have to use with computers or anything else with a full-on USB connection but questionable music processing. It will make a significant difference with those CD-quality Apple Lossless files.
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04-21-2017, 11:22 AM | #14 |
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Hey Guys,
Thanks for the suggestions, I'm now diving deep for some research to figure out what suits me the best. Will report back on my choice once I have it. Best, Omer |
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04-21-2017, 11:33 AM | #15 | |
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