Seeking for a linear, non-equalised analogue output, I encountered several settings in the Headunit of my F10 (2014).
My findings regarding the variant so far:
I adopted the frequency crossover for the Focals build in the door panels. The measurements of the door panel show a nice decreasing response. Surprisingly, var1 increases mid to high frequencies.
Moving the amplifier variant from internal to external
My interim conclusion is that there are 3 setting equalising the frequency response for (non-most) amplified BMW-Systems:
Below other settings are listed which I could not verify.
I would wish to share any experiance regarind those setting. Has anyone measured the frequency response from aux-input to HU-output?
Best wishes
Michael
My findings regarding the variant so far:
- Switching from Stereo to Hifi does not provide a low level output instead of high-level. It does reduce the level of upper frequency range compared to Stereo
- Variants 3 and 4 provide heavy increase in bass level; its sounds "boomy"
- Variant 2: noticeable reduction of high frequencies
- I don't believe that vari1 is linear, but closed ot linear that the other setting of var
I adopted the frequency crossover for the Focals build in the door panels. The measurements of the door panel show a nice decreasing response. Surprisingly, var1 increases mid to high frequencies.
Moving the amplifier variant from internal to external
- definitely reduces the output level of the HU. I have not measured it, but it may provide a voltage in the low-level range
- more noticable is the fact that the bass is more linear
- Even, when the setting is external, the variant (1-4) settings are effective, but with reduced impact
My interim conclusion is that there are 3 setting equalising the frequency response for (non-most) amplified BMW-Systems:
- AUDIO-SYSTEM
- AUDIO_SYSTEM_VAR
- AMPLIFIER_VARIANT
Below other settings are listed which I could not verify.
I would wish to share any experiance regarind those setting. Has anyone measured the frequency response from aux-input to HU-output?
Best wishes
Michael
AUDIO_TUNER_TRAFFIC | AUDIO_SYSTEM | stereo | 0x00 | BMW | Level increase in upper frequency range |
hifi | 0x01 | actual setting | |||
AUDIO_TUNER_TRAFFIC | AUDIO_SYSTEM_VAR | variant_1 | 0x00 | Less bass compared to var2 | |
variant_2 | 0x01 | Less high frequency compared to var1, var3, var4 | |||
variant_3 | 0x02 | high bass level | |||
variant_4 | 0x03 | high bass level | |||
AUDIO_TUNER_TRAFFIC | AMPLIFIER_VARIANT | internal | 0x00 | BMW | |
external | 0x01 | actual setting | Signal seem to be not much lower than "internal"; Sound appears to be much more linear, most recogniseable at low frequencies. | ||
AUDIO_TUNER_TRAFFIC | AUDIO_PROFILE | wert_01 | 0x00 | BMW | |
wert_02 | 0x01 | No difference recognised | |||
AUDIO_TUNER_TRAFFIC | AUDIO_OFFSET | nicht_aktiv | 0x00 | actual setting | No difference recognised |
aktiv | 0x01 | BMW |