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Equipment:
- NAB Broadcast and Audio System Test CD
- Tektronix TDS5104B Oscilloscope
Setup
- Test CD in Bose System CD changer, both swept and white noise tracks evaluated
- Scope FFT enabled with 1 Hz resolution, 250 Ksamples/s, capture length of 200 ms (1/5 of a second)
Observations
- From below 20 Hz to above 20 KHz, the head unit in the Bose labelled Clarion system is pretty flat.
- Using this high bit range CD, distortion products start to quickly emerge at volume levels labelled "20" and above. This means high level sources will start to produce distortion products that could be detectable to trained ears, probably around "24" for most sources. This is assuming good quality speakers and amps after the head unit.
Conclusion
- Upgrading the Murano's sound system should be focused on amplifiers and speakers, do not invest in changing the head unit. It's fine...
Here's a picture of an FFT from White Noise. I could optimise this, but hey, I saw enough to satisfy myself, so it is what it is.
You can see it roll off after 20 kHz, but my dog doesn't seem to care.
- NAB Broadcast and Audio System Test CD
- Tektronix TDS5104B Oscilloscope
Setup
- Test CD in Bose System CD changer, both swept and white noise tracks evaluated
- Scope FFT enabled with 1 Hz resolution, 250 Ksamples/s, capture length of 200 ms (1/5 of a second)
Observations
- From below 20 Hz to above 20 KHz, the head unit in the Bose labelled Clarion system is pretty flat.
- Using this high bit range CD, distortion products start to quickly emerge at volume levels labelled "20" and above. This means high level sources will start to produce distortion products that could be detectable to trained ears, probably around "24" for most sources. This is assuming good quality speakers and amps after the head unit.
Conclusion
- Upgrading the Murano's sound system should be focused on amplifiers and speakers, do not invest in changing the head unit. It's fine...
Here's a picture of an FFT from White Noise. I could optimise this, but hey, I saw enough to satisfy myself, so it is what it is.
You can see it roll off after 20 kHz, but my dog doesn't seem to care.
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