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Great info about SAM in STEREO Magazin 10/2014
#2
Google translate:

STEREO: Monsieur Calmel, as the correction curves
determined for the individual speaker models?

Calmel: Basically with the latest measurement technology in the form
a Klippel system that records all relevant parameters,
with which we can feed our algorithms. two
Engineers for some time exclusively with speaker measurements
beschä? igt. Depends necessary effort
significantly from the respective type. A two-way speaker, whose
Tiefmitteltöner always up to about two or three kilohertz
up transfers, can be detected relatively quickly. Three-way
Structures are more complicated, because the crossover frequency
from deep in the midrange usually between 100 and
200 Hertz, which is exactly in the area, corrected the SAM.
The more abgestu in the transmission area? e chassis available
are, the more complicated the matter. A B & W CM10
to detect peripherally, can there ever a day
avail.

Further work place?

Oh, yes! How we measure in more complex speakers in the
Usually, the crossover and the chassis inside and outside
the housing by extracting and relating the results
as well as with a from the measurements of the housing and
Bassre? exö? calculations. A pretty extensive thing. for
Fortunately, many manufacturers or distributors support us with
Data about the e? ective mass of their membranes or details
to the course

Is there a corresponding verifications of the results?

Since our measurement space in the basement directly below our Paris
Showrooms located, we have extremely short distances and can
check the SAM-correction immediately in practice.

This involves more than just the group delays.

Yes, our goal is the comprehensive optimization of the area
below 200 Hz, where 90 percent of the error boxes
are to be sought. Therefore, there is an enhancement on
most. This includes the frequency response with a. Since we do not
to a Hertz can correct down, we cut depending on
the possibilities of the box the bottom layers steep? ankig from,
yes just what is possible with digital technology.

At the end of the database is to include 200 speakers.
How their selection?

Hi-fi fans can vote for their favorite via the website.
We then revise the models in this order,
which is actually automatically ensures that the most
most popular models here are early. the offer
been very well received. Maybe too good, because we had
been cases where people have tried hundreds of times for her box
to vote or have asked friends, it
do. We now want to stop by address queries.

BUT the most interesting are some measurements done by STEREO magazine. So PLEASE TRANSLATE this text into English:

Also for Wilson Audio Sophia3 (see box at right) is the bass
raised below 40 Hertz. Similarly, the effect can be observed that the bass response with increasing power
becomes flatter. At 50 watts also a lowering, however,
really only in the lowest register, because the Sophia 3 is of course considerably
potent and durable than B & W's 805 Diamond. The lower diagram shows the frequency corrections for two watts of power, if you reduce the effect of SAM manually (see display). At 25 percent is almost no bass boost detectable. The time correction remains unaffected.

Compact with the correction data for B & W 805 Diamond (l.)
fed to demonstrate our measurements on the amplifier output
of 120 plastic dynamic operation of the
SAM software. In addition to the time correction grabbing it below
50 Hertz relatively strong and lifts the bass, where the
Compact speakers fit increasingly must significantly. this
but only happens at low volumes where it to the speaker
no problems. The case of different
Levels determined curves show that the increase with
increasing power failure decreases, until it in
50-watt-line, where the chassis for linear operation probably quickly
would strike, even leads to a reduction. SAM
protects the woofer from overload, and you can even
hear louder than would be possible without correction.
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RE: Great info about SAM in STEREO Magazin 10/2014 - by Confused - 25-Sep-2014, 13:25

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