@Confused
I enjoy your decision to take tests for SAM.
I think some elements in the history of my SAM case might help you in your tests.
It all started when I noticed the temporary "explosions" of bass and sub-bass during the auditions. Initially I blamed the absence of room management / correction. However, when I analyzed the movement of the speaker membrane, I saw clearly that the anomaly is coming from here.
At this point I suspected that there is a problem with the SAM profile for my speakers.
First of all, I wanted to understand what he is doing and how SAM works, and what is the process of generating the SAM profile.
This movie helped me a lot: https://www.youtube.com/watch?v=AcLYb4sBhwQ. I strongly recommend you to watch it.
I realized that there are many parameters and factors that can generate an inappropriate profile. Here are some of them:
I requested from Devialet the parameters used for the SAM profile from my speakers, but they did not provide this info.
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Finally, if it helps you, here is the test scenario I used.
Use it very carefully, it may damage your speakers!
Configuration and setup:
Test scenario:
Result:
Between ~10 Hz and ~30 Hz, SAM ON is performing a very strong bass sound amplification. This is MUTCH more than a simple sound adjustment to match speakers (or SAM purpose: "SAM lets your system achieve perfect temporal alignment between the recorded signal and the acoustic pressure generated by your loudspeakers").
Inside the 12 ÷ 20 Hz range, things are getting really out of control: Expert PRO is generating clicks and distortions on the average speaker (maybe treble speaker too). The source sound is not containing such frequencies, but Expert PRO is "generating" such sounds, and they are pretty loud.
ELEC FS 409 on Devialet site (3 speakers)
ELEC FS 409 in reality (4 speakers)
I enjoy your decision to take tests for SAM.
I think some elements in the history of my SAM case might help you in your tests.It all started when I noticed the temporary "explosions" of bass and sub-bass during the auditions. Initially I blamed the absence of room management / correction. However, when I analyzed the movement of the speaker membrane, I saw clearly that the anomaly is coming from here.
At this point I suspected that there is a problem with the SAM profile for my speakers.
First of all, I wanted to understand what he is doing and how SAM works, and what is the process of generating the SAM profile.
This movie helped me a lot: https://www.youtube.com/watch?v=AcLYb4sBhwQ. I strongly recommend you to watch it.
I realized that there are many parameters and factors that can generate an inappropriate profile. Here are some of them:
- Use of a new (unused) speaker, which has a different bass response compared to a speaker that has been running and has been used for a while.
- The parameters of the speaker that have been introduced in the software can be incorrect. For example, for my speakers:
- Number of bass speakers (see pictures below): In the picture on the Devialet site are presented other speakers, which have one bass speaker, but mine have two. It is possible that in the parameters of the software it was introduced that the speaker has one bass speaker, instead of two.
- Bass reflex: my speakers have a "hidden" bass reflex: it is not a visible hole, but it is somewhere under the speaker. It is possible that in the parameters of the software it was introduced that the speaker does not have a bass reflex, instead of introducing that it has.
I requested from Devialet the parameters used for the SAM profile from my speakers, but they did not provide this info.
----------------------------------------------------------------------------------------------------------------------------------------------------------------
Finally, if it helps you, here is the test scenario I used.
Use it very carefully, it may damage your speakers!
Configuration and setup:
- FIRMWARE 13.1.3 DOS 2.2.4, and also FIRMWARE 13.0.0 DOS 2.2.2
- Configurator: SAM = on
- TONE \ BALANCE = 0%
- TONE \ BASS = 0.0 dB
- TONE \ TREBLE = 0.0 dB
- TONE \ SAM = 100%
Test scenario:
- Set volume to any value starting from -35 dB up to -30 dB
- Use "Online Tone Generator" https://www.szynalski.com/tone-generator/.
- Play sound starting from 1 Hz up to 100 Hz, using 1 Hz step.
- For each frequency played, use the remote and switch SAM on and off.
- Watch the bass speaker movement, and also listen to the sound.
Result:
Between ~10 Hz and ~30 Hz, SAM ON is performing a very strong bass sound amplification. This is MUTCH more than a simple sound adjustment to match speakers (or SAM purpose: "SAM lets your system achieve perfect temporal alignment between the recorded signal and the acoustic pressure generated by your loudspeakers").
Inside the 12 ÷ 20 Hz range, things are getting really out of control: Expert PRO is generating clicks and distortions on the average speaker (maybe treble speaker too). The source sound is not containing such frequencies, but Expert PRO is "generating" such sounds, and they are pretty loud.
ELEC FS 409 on Devialet site (3 speakers)
ELEC FS 409 in reality (4 speakers)
