Symphony 2+ aux input

[Fast4esT]

Just got the correct Bose harness and aux input cable, installed it and everything works. So I'm noticing that there seems to be very little amplification for my aux input running from iPhone 6, and next to no bass. The cd function sounds fine and bass is there.
Is there a aux input level that can be adjusted? Volume is up all the way on phone, and plug is inserted all the way. I did notice some loud static when I try to adjust the plug In the phone.
It sounded better with the tape adapter in the old symphony.
I have aux input coded into the radio

Is the sound quality just that inferior with this? Friend has same setup in his car and I feel that it sounds a lot better in his.

[PreciseD]

I think I had to swap some wires on mine to get it to work properly. If you have the male 3.5mm plug I would try to pull it out just a hair and see if that helps. Sometimes they either don't go in deep enough or go in too deep (that's what she said).

[Fast4esT]

At the phone you mean? I'll mess with that. This was assembled by euro parts, so I assume it's correct. If I didn't have the coding correct it wouldn't work at all I expect. Waiting for pda to charge

[Airflite40]

I noticed in the symphony 2+ that the EQ settings are independent for each mode (AM/FM/CD/AUX). Check the EQ settings for Aux and adjust. I have to turn the volume up to 100% on my iPhone when I plug in, but it still sounds great (no clipping/static).
I guess I should have prefaced this by saying I have the non-Bose symphony 2+.

[Fast4esT]

Yeah it's funny, 100% phone volume is a must. Seems that when I had the non Bose harness, the sound was deeper and bassier. How high do you turn up your radio volume?
Aux EQ is set, and volume override in te menu is set at about 60%, I turn te radio up 70% and treble is good, but there's no depth, and not as much volume as expected

[Matt Devo]

Yeah it's funny, 100% phone volume is a must. Seems that when I had the non Bose harness, the sound was deeper and bassier. How high do you turn up your radio volume?
Aux EQ is set, and volume override in te menu is set at about 60%, I turn te radio up 70% and treble is good, but there's no depth, and not as much volume as expected

both the RNS-E and SII+ have a standard line-level AUX inputs, but your phone isn't outputting a line-level signal via the headphone jack, hence the lower-than-normal output when connected to a line-level input. There's no way a different harness would affect the sound level/characteristics unless it had electronics inline.

[gmudan]

I was extremely disappointed with my symphony ii+ aux volume, my symphony ii with a cassette to 3.5mm jack was way louder. I ditched the symphony ii+ for a RSN-E, and so far perfect. Even my radio works 10/10, and aux is close to perfect. Next up, speaker+ sub upgrade(stock location)

[Fast4esT]

That's where Im at, only reason I upgraded to 2+ was for aux input, over all no longer happy with it.
CDs sound great, but most music is streamed or on iTunes, I like having access to all the tunes.
Radio even sounded good when it picked up a station in my garage.
Recoded headunit, reset EQ.
Aux can't sound this bad, everything else I run through aux, like on the boat through alpine deck input it sounds great.
This setup sounds like I put my iPhone in a tin cup for amplification, I don't think the sub is even pumping with it. Highs are ok, but no mids or lows, turn volume on radio up almost full and no better.
Tape adapter on old symphony sounded loads better.
Will pull the decks again and check the input connections, I remember reading somebody having bad quality and the leads where not seated all the way in the harness.
It does sound like it's not making a full wired connection somewhere.

[Matt Devo]

That's where Im at, only reason I upgraded to 2+ was for aux input, over all no longer happy with it.
CDs sound great, but most music is streamed or on iTunes, I like having access to all the tunes.
Radio even sounded good when it picked up a station in my garage.
Recoded headunit, reset EQ.
Aux can't sound this bad, everything else I run through aux, like on the boat through alpine deck input it sounds great.
This setup sounds like I put my iPhone in a tin cup for amplification, I don't think the sub is even pumping with it. Highs are ok, but no mids or lows, turn volume on radio up almost full and no better.
Tape adapter on old symphony sounded loads better.
Will pull the decks again and check the input connections, I remember reading somebody having bad quality and the leads where not seated all the way in the harness.
It does sound like it's not making a full wired connection somewhere.

now that definitely sounds like a bad connection. make sure the pins are fully seated / not getting pushed out when the harness is connected to the HU

[Fast4esT]

Exactly what I'm thinking. Will report back

[Airflite40]

Mine sounds really really good. Much better bass than regular symphony and sounds just as good as the factory 10 speaker Bose system in my C5 A6.

[Fast4esT]

Euro parts sent me a new auxiliary input cable (very nice of them and thanks again) to try out. This cable sounds better than the last one but still has issues.
Plug 3.5 jack all the way into my phone and I get good sound from left channel and distorted high pitch sound from the right, and not much bass anywhere. If I pull the plug out just a bit then the right side sounds great and nothing comes from the left. There is no happy medium in between.
I tried my phone in a friends car with the same setup as mine and it sounds awesome, way more bass and balanced sound from both sides.
I have a cable with 3.5 male and female ends and Installed it between iPhone and euro parts auxiliary wire, and still get the exact same results, no good.
Find it funny that 2 cables from them could both be bad, gonna go to radio shack and get another cable and try again.
If any of you are having an issue with sound quality, especially if your cables are recent purchase, try what I have done and report back?
Maybe euro parts recieved a bad batch of cables

[Fast4esT]

Ugh, finally got it right, got balmce 98% equal to both sides and got the proper bass level!!!
Yay
Clipped the 3.5 jack from old tape adapter (non shielded) and cut the head off the euro parts aux cable, spliced the wired and presto, it works properly now, much better sound and correct column matching cd level.

Long story short, the supplied aux cable 3.5 jacks where the culprit

[diagnosticator]

Ugh, finally got it right, got balmce 98% equal to both sides and got the proper bass level!!!
Yay
Clipped the 3.5 jack from old tape adapter (non shielded) and cut the head off the euro parts aux cable, spliced the wired and presto, it works properly now, much better sound and correct column matching cd level.

Long story short, the supplied aux cable 3.5 jacks where the culprit

Yeah, it did not make sense that the problem was inherent with the Sym II+, since I have never heard of that before. As you found out, the interconnect is the cause of problems like this. This is the difference between quality audio parts and cheap crap. The crap parts often "look" alright, but it doesn't require much off tolerance manufacturing errors to completely destroy the functional performance.

[Fast4esT]

decided to do it right, and wired a input under the armrest, its out of sight and looks pretty good. Got a new double male end aux cable and 3.5 jack from radio shack, much easier than I expected. and the sound is far superior to what I had before, I honestly have no complaints about the sound now, had to turn the bass down even.

[diagnosticator]

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